Dry burning prevention device of concrete high-temperature steam curing equipment

Abstract

The utility model provides an anti-dry-burning device of concrete high-temperature steam-curing equipment, and relates to the technical field of circuits. According to the dry burning prevention device of the concrete high-temperature steam-curing equipment, the concrete high-temperature steam-curing equipment is provided with a water inlet pipeline, and the water inlet pipeline is provided with a protruding branch pipeline in the water inlet direction. The anti-dry-burning device comprises a water plugging cap, an elastic sealing piece, an ejector rod and an anti-dry-burning circuit. The dry burning prevention circuit comprises a first contact, a first wire, a first parallel branch, a coil of a contactor, a transformer, a second wire, a second contact, an air switch, a second contact of the contactor and a heating wire of the concrete high-temperature steam curing equipment. According to the anti-dry-burning device of the concrete high-temperature steam-curing equipment, the current in the heating wire of the concrete high-temperature steam-curing equipment can be cut off through the connection relation among all the parts of the anti-dry-burning device under the condition that water is suddenly cut off, and dry burning cannot be caused.

Description

Technical Field

[0001] The utility model relates to the technical field of circuits, in particular to an anti-dry burning device for high-temperature concrete steam curing equipment. Background Art

[0002] Concrete usually needs to be cured after pouring to ensure the appearance quality and structural performance of concrete components. High-temperature curing relies on the condensation of steam on concrete to transfer the heat of steam to concrete to achieve the purpose of curing concrete components. At present, the existing electric heating concrete high-temperature curing equipment is not equipped with an anti-dry burning device. When using the concrete high-temperature curing equipment, if the water supply is suddenly stopped, dry burning may occur, which is likely to damage the concrete high-temperature curing equipment and may even cause a fire, posing a major safety hazard. Utility Model Content

[0003] The technical problem to be solved by the utility model is that the existing high-temperature concrete steaming equipment is not provided with an anti-dry burning device, which has a great safety hazard.

[0004] To achieve the above-mentioned purpose, the embodiment of the utility model provides the following technical solutions: a dry burning prevention device for high-temperature steam curing equipment of concrete, the high-temperature steam curing equipment of concrete is provided with a water inlet pipe, and the water inlet pipe is provided with a protruding branch pipe along the water inlet direction. The dry burning prevention device includes a water blocking cap, an elastic sealing sheet, a mandrel and a dry burning prevention circuit. The water blocking cap and the elastic sealing sheet are arranged at the outlet of the branch pipe, and the water blocking cap fixes the elastic sealing sheet at the outlet of the branch pipe to prevent water from flowing out of the outlet of the branch pipe. The first end of the mandrel is arranged at the opening of the water blocking cap, and the second end of the mandrel extends into the through hole of the first fixing device. The dry burning prevention circuit includes a first contact, a first wire, a first parallel branch, a coil of a contactor, a transformer, a second wire, a second contact, an air switch, a second contact of the contactor and a heating wire of the high-temperature steam curing equipment of concrete. The first contact is arranged at a through hole on one side of the first fixing device away from the water blocking cap, and the first contact is connected to one end of the first wire. The other end of the first wire is electrically connected to one end of the first parallel branch. The other end of the first parallel branch is electrically connected to one end of the coil of the contactor, the other end of the coil of the contactor is electrically connected to the first end of the first side of the transformer, the second end of the first side of the transformer is electrically connected to one end of the second wire, and the other end of the second wire is electrically connected to the second contact. The first parallel branch includes a first contact of the contactor connected in parallel and a manual reset button switch. The first contact of the contactor is a normally open contact. The transformer is used to convert the voltage of the second side of the transformer into the voltage of the first side of the transformer. The first wire is fixed on the first fixing device, and the second wire is fixed on the second fixing device. The second fixing device contacts the second contact to limit the position of the second contact. One end of the second contact of the contactor is respectively connected to the first end of the second side of the transformer, the second end of the second side of the transformer and one end of the air switch. The other end of the second contact of the contactor is electrically connected to the heating wire of the concrete high-temperature steaming equipment. The other end of the air switch is connected to the power grid. The second contact of the contactor is a normally open contact. When there is water flowing into the water inlet pipe, the water flows to fill the branch pipe, and the middle part of the elastic sealing sheet is pushed out by the water flow in the branch pipe to extrude the push rod, and drives the push rod to move toward the first contact to push the first contact to maintain connection with the second contact.

[0005] Optionally, the first end of the push rod is fixedly connected to a contact plate, which is arranged at the opening of the water blocking cap. When the middle part of the elastic sealing sheet is pushed out of the opening of the water blocking cap by the water flow filled in the branch pipe, the side of the contact plate away from the push rod contacts the elastic sealing sheet.

[0006] Optionally, the outer side of the portion of the push rod exposed between the contact plate and the through hole of the first fixing device is wrapped with an elastic device, and the expansion and contraction direction of the elastic device is the same as the moving direction of the push rod.

[0007] Optionally, the length of a portion of the push rod exposed outside the through hole of the first fixing device is smaller than the length of a portion of the push rod extending into the through hole of the first fixing device.

[0008] Optionally, a toothed structure is provided on the side of the water blocking cap in contact with the branch pipe, and a toothed structure matching with the toothed structure of the water blocking cap is provided on the side of the branch pipe close to the water blocking cap. The toothed structure of the water blocking cap is fixedly connected to the toothed structure of the branch pipe.

[0009] Optionally, the length of the first wire is greater than the length of the second wire, the position at which the first wire is fixed on the first fixing device is far away from the first contact, and the distance between the position at which the first wire is fixed on the first fixing device and the first contact is greater than the distance between the position at which the second wire is fixed on the second fixing device and the second contact.

[0010] Optionally, the first end of the second side of the transformer is connected to one end of the first fuse, and the other end of the first fuse is connected between one end of the second contact of the contactor and one end of the air switch. The second end of the second side of the transformer is connected to one end of the second fuse, and the other end of the second fuse is connected between one end of the second contact of the contactor and one end of the air switch.

[0011] Optionally, the material of the first contact and / or the material of the second contact is copper alloy.

[0012] The beneficial effect of the utility model is that the utility model provides an anti-dry burning device for concrete high-temperature steaming equipment, which can stop the current in the heating wire of the concrete high-temperature steaming equipment through the connection relationship between the various components of the anti-dry burning device when the water is suddenly cut off, and will not cause dry burning. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the technical solution of the present invention, the following is a brief introduction to the drawings required for use in some embodiments of the present invention. Obviously, the drawings described below are only drawings of some embodiments of the present invention. For those of ordinary skill in the art, other drawings can also be obtained based on these drawings. In addition, the drawings described below can be regarded as schematic diagrams, and are not intended to limit the actual size of the product involved in the embodiments of the present invention, the actual process of the method, the actual timing of the signal, etc.

[0014] Figure 1 is a cross-sectional structural diagram of an anti-dry burning device of a concrete high-temperature steam curing device according to some embodiments;

[0015] Figure 2 A cross-sectional structural diagram of another anti-dry burning device of a concrete high temperature steam curing device according to some embodiments

[0016] Figure 3A cross-sectional structural diagram of a device for preventing dry burning of yet another concrete high-temperature steam curing device according to some embodiments;

[0017] Figure 4 is a cross-sectional schematic diagram of a first fixing device and a push rod according to some embodiments;

[0018] Figure 5 A cross-sectional structural diagram of another anti-dry burning device of a concrete high-temperature steam curing device according to some embodiments;

[0019] Figure 6 It is a cross-sectional structural diagram of another anti-dry burning device of concrete high-temperature steam curing equipment according to some embodiments. DETAILED DESCRIPTION

[0020] The following will be combined with the accompanying drawings to clearly and completely describe the technical solutions in some embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments provided by the utility model, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the utility model.

[0021] Some embodiments of the utility model provide a dry burning prevention device for high temperature concrete steam curing equipment, such as Figure 1 As shown, the concrete high temperature steam curing equipment is provided with a water inlet pipe 01, and the water inlet pipe 01 is provided with a protruding branch pipe 02 along the water inlet direction. The anti-dry burning device includes a water blocking cap 03, an elastic sealing sheet 04, a top rod 05 and an anti-dry burning circuit. The anti-dry burning circuit includes a first contact 06, a first wire 07, a first parallel branch, a coil KM11 of a contactor, a transformer T, a second wire 08, a second contact 09, an air switch QS, a second contact KM13 of a contactor and a heating wire HW of the concrete high temperature steam curing equipment.

[0022] Understandably, if Figure 1 As shown, the direction indicated by the arrow is the water flow direction. The water inlet pipe 01 is connected to the float valve of the concrete high temperature steam curing equipment along the lower side of the water inlet direction.

[0023] like Figure 1 As shown, the water blocking cap 03 and the elastic sealing sheet 04 are arranged at the outlet of the branch pipe 02, and the water blocking cap 03 fixes the elastic sealing sheet 04 at the outlet of the branch pipe 02 to prevent water from flowing out of the outlet of the branch pipe 02. The water blocking cap 03 is provided with an opening at the center of the outlet of the branch pipe 02, and the first end of the top rod 05 is provided at the opening of the water blocking cap 03, and the second end of the top rod 05 extends into the through hole of the first fixing device G1.

[0024] like Figure 1As shown, the first contact 06 is arranged at the through hole on the side of the first fixture G1 away from the water blocking cap 03, and the first contact 06 is connected to one end of the first wire 07. The other end of the first wire 07 is electrically connected to one end of the first parallel branch. The other end of the first parallel branch is electrically connected to one end of the coil KM11 of the contactor, the other end of the coil KM11 of the contactor is electrically connected to the first end T11 of the first side of the transformer T, the second end T12 of the first side of the transformer T is electrically connected to one end of the second wire 08, and the other end of the second wire 08 is electrically connected to the second contact 09. The first parallel branch includes the first contact KM12 of the contactor and the manual reset button switch RST connected in parallel. The first contact KM12 of the contactor is a normally open contact. The transformer T is used to convert the voltage on the second side of the transformer T into the voltage on the first side of the transformer T. The first wire 07 is fixed on the first fixture G1, and the second wire 08 is fixed on the second fixture G2. The second fixture G2 contacts the second contact 09 to limit the position of the second contact 09.

[0025] like Figure 1 As shown, one end of the second contact KM13 of the contactor is respectively connected to the first end T21 of the second side of the transformer T, the second end T22 of the second side of the transformer T and one end of the air switch QS. The other end of the second contact KM13 of the contactor is electrically connected to the heating wire HW of the concrete high temperature steam curing equipment. The other end of the air switch QS is connected to the power grid. The second contact KM13 of the contactor is a normally open contact.

[0026] like Figure 1 As shown, when water flows into the water inlet pipe 01, the water flows to fill the branch pipe 02, and the middle part of the elastic sealing sheet 04 is pushed out by the water flow filled in the branch pipe 02 to extrude the push rod 05, and drives the push rod 05 to move toward the direction of the first contact 06 until the first contact 06 is pushed to maintain connection with the second contact 09.

[0027] In some embodiments, the side of the water blocking cap 03 that contacts the branch pipe 02 is provided with a tooth structure (not shown in the figure), and the side of the branch pipe 02 close to the water blocking cap 03 is provided with a tooth structure (not shown in the figure) that matches the tooth structure of the water blocking cap 03. The tooth structure of the water blocking cap 03 is engaged with the tooth structure of the branch pipe 02.

[0028] It can be understood that the toothed structure of the water shutoff cap 03 and the toothed structure of the branch pipe 02 can be engaged together, so that the water shutoff cap 03 can be connected to the branch pipe 02 more firmly.

[0029] Exemplarily, the toothed structure of the water shutoff cap 03 is similar to the internal thread structure of a nut, and the toothed structure of the branch pipe 02 is similar to the external thread structure of a screw. By rotating the water shutoff cap 03, the toothed structure of the water shutoff cap 03 can be rotated to engage with the toothed structure of the branch pipe 02, so as to establish a more stable connection between the water shutoff cap 03 and the branch pipe 02.

[0030] Understandably, if Figure 1 As shown, the water shutoff cap 03 is provided with an opening at the center of the outlet of the branch pipe 02, and the opening can be set to be circular to facilitate the elastic sealing sheet 04 to be pushed out. In actual application, the size of the center opening of the water shutoff cap 03 can be set according to the application scenario.

[0031] Understandably, if Figure 1 As shown, the elastic sealing sheet 04 is circular, and the center of the elastic sealing sheet 04 is located on the center line of the branch pipe 02 (cylindrical). In order to more clearly show the positional relationship between the outlet of the branch pipe 02, the water blocking cap 03 and the elastic sealing sheet 04, Figure 1 The distance between the water blocking cap 03 and the opening of the branch pipe 02 is enlarged. In actual application, the water blocking cap 03 can press the circumference of the elastic sealing sheet 04 tightly against the outlet of the branch pipe 02 to prevent the elastic sealing sheet 04 from falling out from the central opening of the water blocking cap 03.

[0032] In some embodiments, Figure 2 As shown, the first end of the push rod 05 is fixedly connected to a contact plate 051, and the contact plate 051 is arranged at the opening of the water blocking cap 03. When the middle part of the elastic sealing sheet 04 is pushed out of the opening of the water blocking cap 03 by the water flow filled in the branch pipe 02, the side of the contact plate 051 away from the push rod 05 contacts the elastic sealing sheet 04.

[0033] For example, the mandrel 05 can be cylindrical or rectangular, and the mandrel 05 is arranged parallel to the pipe wall of the branch pipe 02, and in the direction parallel to the branch pipe 02, the center line of the mandrel 05 coincides with the center line of the branch pipe 02, that is, the longitudinal center line of the mandrel 05 passes through the center of the elastic sealing sheet 04, such an arrangement can make the force on the mandrel 05 more uniform. The position where the mandrel 05 is fixedly connected to the contact plate 051 can be set at the center position of the contact plate 051.

[0034] For example, the contact plate 051 may be circular or triangular. The contact plate 051 may increase the contact area between the push rod 05 and the elastic sealing sheet 04, so that the force on the push rod 05 is more uniform.

[0035] Understandably, if Figure 2As shown, a cap stopper 031 may be provided at the opening of the water blocking cap 03. The cap stopper 031 may be tubular and the wall of the cap stopper 031 is arranged parallel to the wall of the branch pipe 02. The cap stopper 031 may prevent the position where the contact plate 051 and the elastic sealing sheet 04 are connected from being displaced to affect the normal operation of the anti-dry-burning circuit.

[0036] In some embodiments, Figure 3 As shown, the outer side of the portion of the push rod 05 exposed between the contact plate 051 and the through hole of the first fixing device G1 is wrapped with an elastic device 052. The expansion and contraction direction of the elastic device 052 is the same as the moving direction of the push rod.

[0037] Exemplarily, the elastic device 052 may be a spring. When there is water flow in the branch pipe 02, the water flow squeezes the elastic sealing sheet 04 until the elastic sealing sheet 04 contacts the contact plate 051, and the contact plate 051 squeezes the elastic device 052 and drives the push rod 05 to move toward the first contact 06, and the elastic device 052 is in a compressed state. In the case of a sudden water outage, the water flow in the branch pipe 02 will not squeeze the elastic sealing sheet 04, and the contact plate 051 will not be able to continue squeezing the elastic device 052. The elastic device 052 will release pressure and return to a normal state, so that the contact plate 051 is subjected to the force of the elastic device 052 and moves toward the elastic sealing sheet 04, thereby driving the push rod 05 to leave the first contact 06 and return to the through hole of the first fixing device G1. The first contact 06 is no longer squeezed by the push rod 05 and moves away from the second contact 09.

[0038] In some embodiments, Figure 4 As shown, the length L of the portion of the push rod 05 exposed outside the through hole of the first fixing device G1 is smaller than the length H of the portion of the push rod 05 extending into the through hole of the first fixing device G1.

[0039] It can be understood that the top rod 05 is not fixedly connected to any component, so if the length L of the portion of the top rod 05 exposed outside the through hole of the first fixture G1 is less than the length H of the portion of the top rod 05 extending into the through hole of the first fixture G1, most of the top rod 05 is confined in the through hole of the first fixture G1. Thus, the portion of the top rod 05 extending into the through hole of the first fixture G1 can confine the top rod 05 in the through hole of the first fixture G1, so that the top rod 05 is not easy to be separated from the through hole of the first fixture G1, and will not affect the normal operation of the anti-dry burning device provided by the embodiment of the utility model.

[0040] It can be understood that in actual applications, the sizes, specifications and shapes of the water blocking cap 03, the elastic sealing sheet 04, the top rod 05, the contact plate 051 and the elastic device 052 can be set according to actual conditions.

[0041] In some embodiments, the material of the first contact 06 and / or the material of the second contact 09 is copper alloy.

[0042] It can be understood that copper alloy has the advantages of good corrosion resistance, high strength, good conductivity, high melting point, etc., which can make the anti-dry burning device of the concrete high-temperature steaming equipment provided in the embodiment of the utility model more stable.

[0043] In some embodiments, the length of the first wire 07 is greater than the length of the second wire 08, the position at which the first wire 07 is fixed on the first fixture G1 is far away from the first contact 06, and the distance between the position at which the first wire 07 is fixed on the first fixture G1 and the first contact 06 is greater than the distance between the position at which the second wire 08 is fixed on the second fixture G2 and the second contact 09.

[0044] It can be understood that, according to the lever principle, setting the length of the first wire 07 to be greater than the length of the second wire 08, and fixing the first wire 07 on the first fixing device G1 at a position away from the first contact 06 can make it easier for the push rod 05 to push the first contact 06 to contact the second contact 09.

[0045] For example, Figure 5 As shown, the first wire 07 is fixed to the first fixing device G1 by two screws, and the second wire 08 is fixed to the second fixing device G2 by two screws.

[0046] It can be understood that the materials of the first fixing device G1 and the second fixing device G2 are both insulating materials, such as wood blocks. The first fixing device G1 and the second fixing device G2 can be fixed near the outlet of the branch pipe 02. The second fixing device G2 is also used to limit the position of the second contact 09, so the second contact 09 can also be fixed on the second fixing device G2, or it can be not fixed on the second fixing device G2.

[0047] In some embodiments, Figure 6 As shown, the first end T21 of the second side of the transformer T is connected to one end of the first fuse FU1, and the other end of the first fuse FU1 is connected between one end of the second contact KM13 of the contactor and one end of the air switch QS. The second end T22 of the second side of the transformer T is connected to one end of the second fuse FU2, and the other end of the second fuse FU2 is connected between one end of the second contact KM13 of the contactor and one end of the air switch QS.

[0048] It can be understood that the first fuse FU1 and the second fuse FU2 can prevent the voltage on the second side of the transformer T from being too large, causing a sudden change in the voltage on the first side of the transformer T and damaging the anti-dry-burning circuit.

[0049] Exemplarily, the voltage on the second side of the transformer T may be the voltage of the grid, and the voltage on the first side of the transformer T may be 36V.

[0050] It can be understood that the voltage across the coil KM11 of the contactor (i.e., the voltage on the first side of the transformer T) can be any one of 380V, 220V, 36V, 24V, and 12V. Setting the voltage across the coil KM11 of the contactor (i.e., the voltage on the first side of the transformer) to 36V or below 36V can better ensure the safety performance of the device.

[0051] The working principle of a dry burning prevention device for high temperature steam curing equipment of concrete provided by some embodiments of the utility model is described below.

[0052] It can be understood that when there is water flowing into the water inlet pipe 01, the water flow fills the branch pipe 02, the elastic sealing sheet 04 is squeezed by the water flow filled in the branch pipe 02, and the middle part of the elastic sealing sheet 04 is pushed out by the water flow filled in the branch pipe 02 to contact with the contact plate 051, and drives the push rod 05 (at this time, the elastic device 052 is in a compressed state) to push the first contact 06 to maintain connection with the second contact 09. At this time, if the air switch QS is closed, then when the staff manually presses the manual reset switch RST, the coil KM11 of the contactor, the manual reset switch RST, the first side of the transformer T, the first contact 06 and the second contact 09 form a closed loop. When the coil KM11 of the contactor is energized, the first contact KM12 of the contactor and the second contact KM13 of the contactor are closed, so that even if the staff releases the manual reset switch RST, the coil KM11 of the contactor, the first contact KM12 of the contactor, the first side of the transformer T, the first contact 06 and the second contact 09 can form a closed loop, so that the coil KM11 of the contactor can remain energized, and the first contact KM12 of the contactor and the second contact KM13 of the contactor can remain in a closed state. When the second contact KM13 remains in a closed state, the power grid, the air switch QS, and the heating wire HW of the concrete high-temperature steaming and curing equipment form a closed loop, so that there is a continuous current in the heating wire HW of the concrete high-temperature steaming and curing equipment, and the heating wire HW of the concrete high-temperature steaming and curing equipment works normally.

[0053] It can be understood that if the water supply is suddenly stopped and no water flows into the water inlet pipe 01, without any precautions, the water flow in the branch pipe 02 is not full, so that the water flow cannot squeeze the elastic sealing sheet 04, and the middle part of the elastic sealing sheet 04 cannot be pushed out. At this time, the elastic device 052 releases the pressure from the compressed state due to the elastic force. During the process of releasing the pressure of the elastic device 052, the contact plate 051 drives the push rod 05 to move in the direction of the elastic sealing sheet 04, and the push rod 05 retracts into the through hole of the first fixing device G1, and the push rod 05 no longer contacts the first contact 06. The first contact 06 returns to its original position because it is no longer subjected to external force, that is, the first contact 06 and the second Contact 09 is no longer connected, and the closed loop formed by the contactor coil KM11, the contactor first contact KM12, the first side of the transformer T, the first contact 06 and the second contact 09 is disconnected. The contactor coil KM11 loses power, and the contactor first contact KM12 and the contactor second contact KM13 are disconnected. The closed loop formed by the power grid, the air switch QS, and the heating wire HW of the concrete high-temperature steaming equipment is disconnected. There is no current in the heating wire HW of the concrete high-temperature steaming equipment, and heating cannot continue, thereby preventing dry burning in the case of water outage, protecting the concrete high-temperature steaming equipment, and preventing fires caused by dry burning.

[0054] It can be understood that the anti-dry burning device for high-temperature concrete steaming equipment provided by the utility model can be used for pure electric high-temperature concrete steaming equipment, and can also be used for both gas-fired and electric-heated high-temperature concrete steaming equipment. A gas electronic valve is added to the gas pipeline, and the anti-dry burning device for high-temperature concrete steaming equipment provided by the utility model can be combined with the anti-dry burning function of the anti-dry burning device.

[0055] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any changes or substitutions that a person skilled in the art can think of within the technical scope disclosed by the utility model should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A dry burning prevention device for high temperature concrete steam curing equipment, characterized in that: The concrete high temperature steam curing equipment is provided with a water inlet pipe, and the water inlet pipe is provided with a protruding branch pipe along the water inlet direction; the anti-dry burning device includes a water blocking cap, an elastic sealing sheet, a push rod and an anti-dry burning circuit; The water blocking cap and the elastic sealing sheet are arranged at the outlet of the branch pipe, and the water blocking cap fixes the elastic sealing sheet at the outlet of the branch pipe to prevent water from flowing out of the outlet of the branch pipe; the water blocking cap is provided with an opening at the center of the outlet of the branch pipe, and the first end of the mandrel is provided at the opening of the water blocking cap, and the second end of the mandrel extends into the through hole of the first fixing device; The anti-dry burning circuit includes a first contact, a first wire, a first parallel branch, a coil of a contactor, a transformer, a second wire, a second contact, an air switch, a second contact of the contactor and a heating wire of a concrete high-temperature steam curing device; The first contact is arranged at a through hole on a side of the first fixing device away from the water blocking cap, the first contact is connected to one end of the first wire, the other end of the first wire is electrically connected to one end of the first parallel branch; the other end of the first parallel branch is electrically connected to one end of the coil of the contactor, the other end of the coil of the contactor is electrically connected to the first end of the first side of the transformer, the second end of the first side of the transformer is electrically connected to one end of the second wire, the other end of the second wire is electrically connected to the second contact; the first parallel branch includes a first contact of the contactor connected in parallel and a manual reset button switch; the first contact of the contactor is a normally open contact; The transformer is used to convert the voltage on the second side of the transformer into the voltage on the first side of the transformer; the first wire is fixed on a first fixing device, and the second wire is fixed on a second fixing device; the second fixing device is in contact with the second contact to limit the position of the second contact; One end of the second contact of the contactor is respectively connected to the first end of the second side of the transformer, the second end of the second side of the transformer and one end of the air switch; the other end of the second contact of the contactor is electrically connected to the heating wire of the concrete high-temperature steaming equipment; the other end of the air switch is connected to the power grid; the second contact of the contactor is a normally open contact; When water flows into the water inlet pipe, the water flows to fill the branch pipe, and the middle portion of the elastic sealing sheet is pushed out by the water flow in the branch pipe to squeeze the push rod, and drives the push rod to move toward the first contact to push the first contact to maintain connection with the second contact.

2. The anti-dry burning device of the concrete high temperature steam curing equipment according to claim 1, characterized in that: The first end of the push rod is fixedly connected to a contact plate, and the contact plate is arranged at the opening of the water blocking cap; when the middle part of the elastic sealing sheet is pushed out of the opening of the water blocking cap by the water flow filled in the branch pipe, the side of the contact plate away from the push rod contacts the elastic sealing sheet.

3. The anti-dry burning device of the concrete high temperature steam curing equipment according to claim 2, characterized in that: An elastic device is wrapped around the outer side of the portion of the push rod exposed between the contact plate and the through hole of the first fixing device; the expansion and contraction direction of the elastic device is the same as the moving direction of the push rod.

4. The anti-dry burning device of a concrete high temperature steam curing equipment according to any one of claims 1 to 3, characterized in that: The length of the portion of the push rod exposed outside the through hole of the first fixing device is smaller than the length of the portion of the push rod extending into the through hole of the first fixing device.

5. The anti-dry burning device of the concrete high temperature steam curing equipment according to claim 1, characterized in that: The side of the water blocking cap in contact with the branch pipe is provided with a toothed structure, and the side of the branch pipe close to the water blocking cap is provided with a toothed structure that matches the toothed structure of the water blocking cap; the toothed structure of the water blocking cap is engaged with the toothed structure of the branch pipe.

6. The anti-dry burning device of the concrete high temperature steam curing equipment according to claim 1, characterized in that: The length of the first wire is greater than that of the second wire, the position at which the first wire is fixed on the first fixing device is far away from the first contact, and the distance between the position at which the first wire is fixed on the first fixing device and the first contact is greater than the distance between the position at which the second wire is fixed on the second fixing device and the second contact.

7. The anti-dry burning device of the concrete high temperature steam curing equipment according to claim 1, characterized in that: The first end of the second side of the transformer is connected to one end of the first fuse, and the other end of the first fuse is connected between one end of the second contact of the contactor and one end of the air switch; the second end of the second side of the transformer is connected to one end of the second fuse, and the other end of the second fuse is connected between one end of the second contact of the contactor and one end of the air switch.

8. The anti-dry burning device of the concrete high temperature steam curing equipment according to claim 1, characterized in that: The material of the first contact and / or the material of the second contact is copper alloy.

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