Glue gun for construction engineering

Abstract

The present invention relates to the technical field of glue guns, and discloses a glue gun for construction engineering, including a gun housing, a connecting and mixing assembly, an auxiliary injection assembly, and a driving assembly. The gun housing includes a gun body and a gun handle, and one end of the gun body is provided with a mounting frame for installing a double-tube glue cartridge; the connecting and mixing assembly includes a connector and a delivery pipe, one end of the connector is fixedly connected to the discharge port, and the other end of the connector is rotatably connected to one end of the delivery pipe; the auxiliary injection assembly, the auxiliary injection assembly is connected to the other end of the delivery pipe, and is used to pressurize and spray the mixed raw materials; the driving assembly is used to push two extrusion plates to press the colloid in the double-tube glue cartridge into the delivery pipe, and drive the delivery pipe to rotate. The present invention can improve the performance of polyurea glue by mixing the raw materials extruded in the double-tube glue cartridge by rotating the delivery pipe. In addition, pressure can be applied to the inside of the nozzle from multiple positions, which is beneficial to the injection of polyurea glue.

Description

Technical Field

[0001] The invention relates to the technical field of glue guns, and more particularly to a glue gun for construction engineering. Background Art

[0002] Polyurea coating is a kind of dust-free material polyurea coating, which has the characteristics of strong adhesion, friction resistance, and high hardness, and is often used for architectural seam beautification. Polyurea hose is usually composed of two material tubes, and the two material tubes respectively store isocyanate components and amino compound components. These two components react to form polyurea elastomer substances. Polyurea hose is usually used with a glue gun, and the pressure of the glue gun is used to squeeze the polyurea glue in the polyurea hose out from the outlet.

[0003] However, when using the existing glue gun, the isocyanate component and the amino compound component in the two material tubes are usually squeezed into the delivery pipe first, and then the gas pressure is applied at the nozzle to spray the colloid from the nozzle. However, the mixing degree of the isocyanate component and the amino compound component is limited, which will affect the performance of the polyurea glue, and the gas is usually arranged perpendicular to the flow direction of the polyurea glue, which will affect the circulation of the polyurea glue. Summary of the invention

[0004] The invention provides a glue gun for construction engineering, which solves the technical problems in the related art that the mixing degree of isocyanate component and amino compound component is limited and the introduced gas will affect the circulation of polyurea glue.

[0005] The present invention provides a glue gun for construction engineering, which is used to squeeze out glue in a double-tube glue cartridge, one end of the double-tube glue cartridge is provided with a discharge port, and the other end of the double-tube glue cartridge is provided with two extrusion plates, the glue gun for construction engineering comprises: a gun housing, the gun housing comprises a gun body and a gun handle connected to the bottom of the gun body, a chamber is provided inside the gun body, one end of the gun body is provided with a mounting frame, the mounting frame is used to install the double-tube glue cartridge; a connecting mixing component, which is connected to the discharge port and is used to mix and transport the raw materials in the double-tube glue cartridge, and comprises: a connecting head and a transport pipe, one end of the connecting head is fixedly connected to the discharge port, and the other end of the connecting head is rotatably connected to one end of the transport pipe; an auxiliary injection component, the auxiliary injection component The auxiliary injection assembly is connected to the other end of the delivery pipe, and is used to pressurize and spray the mixed raw materials. It includes: a nozzle, a nozzle, an air intake shell and a support frame. One end of the nozzle is rotatably connected to the other end of the delivery pipe, and the other end of the nozzle is connected to the nozzle. A plurality of air inlets are provided on the nozzle. The air intake shell is arranged on the nozzle and wraps the plurality of air inlets. An air intake pipe connected to the plurality of air inlets is arranged on the air intake shell. The two ends of the support frame are fixedly connected to the discharge port and the nozzle respectively; a driving assembly, which is arranged on the gun housing, and is used to push the two extrusion plates to press the raw materials in the double-tube rubber cartridge into the delivery pipe, and drive the delivery pipe to rotate.

[0006] As a further improvement of the present invention, the mounting frame includes a connecting plate and a plurality of connecting rods, the two ends of the plurality of connecting rods are respectively connected to the gun housing and the connecting plate, and an installation cavity is defined between the gun housing, the connecting plate and the plurality of connecting rods, and the double-tube rubber cartridge is installed in the installation cavity.

[0007] As a further improvement of the present invention, the driving assembly includes: a motor, a first transmission shaft, a second transmission shaft and two parallel rack plates, the axes of the first transmission shaft and the second transmission shaft are parallel to each other and are both rotatably connected in the chamber, one end of the first transmission shaft extends into the inside of the gun handle and is fixedly connected to the output end of the motor, the first transmission shaft and the second transmission shaft are respectively fixedly connected with a first gear and a second gear that match each other, the first gear and the second gear are respectively matched with the two rack plates, the two rack plates correspond one-to-one to the two extrusion plates, the two rack plates are slidably connected in the chamber and one end of each rack plate passes through the gun body and selectively cooperates with the corresponding extrusion plates; it also includes: a transmission assembly, one end of the transmission assembly is connected to the second transmission shaft, and the other end is connected to the delivery pipe, which is used to transfer the kinetic energy of the first transmission shaft to the delivery pipe to drive the delivery pipe to rotate.

[0008] As a further improvement of the present invention, the transmission assembly includes: a third transmission shaft and a transmission rod, the third transmission shaft is rotatably connected in the chamber, and its axis is parallel to the axis of the second transmission shaft, a first pulley assembly is transmission-connected between the second transmission shaft and the third transmission shaft, a first bevel gear is fixedly connected to the third transmission shaft, the transmission rod is rotatably connected to the gun body, one end of the transmission rod extends into the chamber and is fixedly connected to a second bevel gear that matches the first bevel gear, and the other end of the transmission rod passes through the connecting plate and is transmission-connected to the conveying pipe by a second pulley assembly.

[0009] As a further improvement of the present invention, an auxiliary frame is fixedly connected to the support frame, and the auxiliary frame is rotatably connected to the conveying pipe.

[0010] As a further improvement of the present invention, an air intake cavity is formed between the air intake shell and the nozzle, and the air intake cavity is constructed as an annular structure coaxial with the nozzle.

[0011] As a further improvement of the present invention, the plurality of air inlets are distributed in a circular array about the axis of the nozzle.

[0012] As a further improvement of the present invention, the air inlet is an inclined structure, and in the direction from the outside to the inside of the nozzle, the air inlet is inclined toward one side of the nozzle.

[0013] As a further improvement of the present invention, the caulking gun for construction engineering further includes: a moving plate, the moving plate is slidably connected in the chamber, and the moving plate is fixedly connected to the other ends of the two rack plates.

[0014] As a further improvement of the present invention, the transmission rod is arranged at the bottom of the conveying pipe.

[0015] The beneficial effects of the present invention are:

[0016] 1. The present invention connects the discharge port of the double-tube rubber cartridge with the delivery pipe by providing a connector, and drives the delivery pipe to rotate by a driving assembly, so that the raw materials extruded in the double-tube rubber cartridge can be mixed by utilizing the rotation of the delivery pipe, thereby improving the performance of the polyurea rubber. In addition, by providing a plurality of inclined air inlets in a circumferential annular array on the nozzle, pressure can be applied to the inside of the nozzle from multiple positions, thereby better driving the polyurea rubber to flow, and providing a greater pressure for the polyurea rubber, which is beneficial to the injection of the polyurea rubber.

[0017] 2. The present invention designs a transmission assembly, which can simultaneously control the extrusion of the extrusion plate by the rack plate and the rotation of the conveying pipe through a single motor, thereby saving parts and space and facilitating control. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of a first stereoscopic structure of a glue gun for construction engineering according to an embodiment of the present invention;

[0019] Figure 2 It is a partial structural schematic diagram of a second three-dimensional structural schematic diagram of a glue gun for construction engineering according to an embodiment of the present invention;

[0020] Figure 3 This is a schematic diagram of a partial structure of a glue gun for construction engineering according to an embodiment of the present invention;

[0021] Figure 4 It is a three-dimensional cross-sectional structural schematic diagram of a glue gun for construction engineering according to an embodiment of the present invention;

[0022] Figure 5 It is a schematic diagram of a top cross-sectional structure of a glue gun for construction engineering according to an embodiment of the present invention;

[0023] Figure 6 It is a partial structural schematic diagram of a first main cross-section of a glue gun for construction engineering according to an embodiment of the present invention;

[0024] Figure 7 It is a partial structural schematic diagram of a second main cross-section of a glue gun for construction engineering according to an embodiment of the present invention;

[0025] Figure 8 It is a third main cross-sectional structural schematic diagram of a glue gun for construction engineering according to an embodiment of the present invention;

[0026] Fig. 9 yes Figure 8 The enlarged schematic diagram of point A in the middle;

[0027] Fig.10 The present invention is a schematic diagram of a side cross-sectional structure of a glue gun for construction engineering according to an embodiment of the present invention.

[0028] In the figure: 1, gun shell; 11, gun body; 111, chamber; 12, gun handle; 13, mounting frame; 131, connecting plate; 132, connecting rod; 2, double-tube rubber cylinder; 21, discharge port; 22, extrusion plate; 3, connecting mixing assembly; 31, connecting head; 32, conveying pipe; 4, auxiliary injection assembly; 41, nozzle; 411, air inlet; 42, nozzle; 43, air inlet shell; 431, air inlet pipe; 44, support frame; 441. Auxiliary frame; 45. Air inlet chamber; 5. Driving assembly; 51. Motor; 52. First transmission shaft; 53. Second transmission shaft; 54. Rack plate; 55. First gear; 56. Second gear; 57. Transmission assembly; 571. Third transmission shaft; 572. Transmission rod; 573. First bevel gear; 574. Second bevel gear; 575. First pulley assembly; 576. Second pulley assembly; 6. Moving plate. DETAILED DESCRIPTION

[0029] The subject matter described herein will now be discussed with reference to example embodiments. It should be understood that the discussion of these embodiments is only to enable those skilled in the art to better understand and implement the subject matter described herein, and the functions and arrangements of the elements discussed may be changed without departing from the scope of protection of the contents of this specification. Each example may omit, replace or add various processes or components as needed. In addition, the features described relative to some examples may also be combined in other examples.

[0030] like Figure 1-Figure 10 As shown, a glue gun for construction engineering is used to spray out the polyurea glue in the double-tube glue barrel 2. One end of the double-tube glue barrel 2 is provided with a discharge port 21, and the other end of the double-tube glue barrel 2 is provided with two extrusion plates 22. It should be noted that the outer structure of the discharge port 21 is a cylindrical structure with one side open and the inside hollow, and two discharge pipes are provided inside, and the two discharge pipes are respectively connected to the two pipes of the double-tube glue barrel 2. By extruding the two extrusion plates 22 toward the discharge port 21, the isocyanate component and the amino compound in the double-tube glue barrel 2 can be squeezed out, and then mixed to obtain the polyurea glue.

[0031] The glue gun for construction engineering includes: a gun housing 1, a connecting and mixing component 3, an auxiliary injection component 4 and a driving component 5. Among them, the gun housing 1 mainly plays a supporting and mounting role. The gun housing 1 includes a gun body 11 and a gun handle 12. The gun handle 12 is fixedly connected to the bottom of the gun body 11. The gun body 11 is provided with a chamber 111 inside. The chamber 111 mainly plays a mounting role. A mounting frame 13 is fixedly connected to one end of the gun body 11. The mounting frame 13 is used to install a double-tube glue cartridge 2. Specifically, the mounting frame 13 includes a connecting plate 131 and a plurality of connecting rods 132. The connecting plate 131 is arranged on a side away from the gun housing 1. The two ends of the plurality of connecting rods 132 are fixedly connected to the gun housing 1 and the connecting plate 131, respectively, so that the connection between the connecting plate 131 and the gun housing 1 can be made more stable and reliable. Moreover, an installation cavity is defined between the gun housing 1, the connecting plate 131 and the plurality of connecting rods 132. It should be noted that the axes of the plurality of connecting rods 132 are the same as the moving direction of the extrusion plate 22, and the plurality of connecting rods 132 are installed at the bottom and sides of the gun housing 1 and the connecting plate 131, so that an opening can be formed above the plurality of connecting rods 132, that is, there is an opening above the installation cavity, and the double-tube rubber cartridge 2 can be placed inside the installation cavity through the opening.

[0032] In addition, if Figure 1 As shown, the connecting and mixing assembly 3 is connected to the discharge port 21, and is used to mix and transport the raw materials in the double-tube rubber cartridge 2. It includes: a connector 31 and a delivery pipe 32. One end of the connector 31 is fixedly connected to the discharge port 21, and the other end of the connector 31 is rotatably connected to one end of the delivery pipe 32. The connector 31 is a tubular structure, which is used to connect the discharge port 21 with the delivery pipe 32, so as to facilitate mixing the raw materials in the double-tube rubber cartridge 2. The connector 31 is connected to the inside of the discharge port 21, and the connection between the connector 31 and the discharge port 21 can be an interference fit or a threaded connection. The other end of the connector 31 is rotatably connected to the delivery pipe 32, that is, the delivery pipe 32 can rotate relative to the connector 31, so that when the two raw materials in the double-tube rubber cartridge 2 enter the delivery pipe 32 from the discharge port 21 and the connector 31, they can be mixed more fully under the rotation of the delivery pipe 32, thereby improving the performance of the polyurea adhesive.

[0033] In addition, if Figure 1 , Figure 8 and Fig. 9As shown, the auxiliary injection assembly 4 is connected to the other end of the delivery pipe 32, and is used to pressurize and spray the mixed raw materials, and includes a nozzle 41, a nozzle 42, an air intake shell 43 and a support frame 44. One end of the nozzle 41 is rotatably connected to the other end of the delivery pipe 32, and the other end of the nozzle 41 is fixedly connected to the nozzle 42, so that the delivery pipe 32, the nozzle 41 and the nozzle 42 can form a flow path, and the polyurea glue that flows into the delivery pipe 32 and is mixed can flow to the nozzle 42 through the nozzle 41, and then be sprayed out from the nozzle 42.

[0034] Furthermore, if Fig. 9 As shown, the nozzle 41 is provided with a plurality of air inlets 411, the air inlet shell 43 is arranged on the nozzle 41 and forms a wrap around the plurality of air inlets 411, the air inlet shell 43 is provided with an air inlet pipe 431 connected with the plurality of air inlets 411, and the two ends of the support frame 44 are respectively fixedly connected with the discharge port 21 and the nozzle 41. Among them, the air inlet 411 and the air inlet pipe 431 can both play the role of air intake, and the air inlet pipe 431 is connected with an external air source. When in use, the external air source flows from the air inlet pipe 431 into the air inlet shell 43, and then passes into the nozzle 41 through the plurality of air inlets 411, so that the polyurea glue flowing through the nozzle 41 can be pressurized and ejected. The design of the plurality of air inlets 411 can intake air into the nozzle 41 from multiple positions, so that the polyurea glue can be pressurized from multiple positions, reducing the pressure of the gas on the polyurea glue in one direction, thereby reducing the influence on the flow of the polyurea glue, and making the flow of the polyurea glue more stable.

[0035] In addition, if Figure 2 and Figure 3 As shown, the two ends of the support frame 44 are fixedly connected to the discharge port 21 and the nozzle 41, respectively, so that the connection between the discharge port 21 and the nozzle 41 can be more stable, so that the conveying pipe 32 can be better rotated relative to the discharge port 21 and the nozzle 41. Of course, the two ends of the support frame 44 can also be fixedly connected to the connector 31 and the nozzle 41, respectively.

[0036] As an optional embodiment, Figure 2 As shown, an auxiliary frame 441 is fixedly connected to the support frame 44, and the auxiliary frame 441 is rotatably connected to the delivery pipe 32. Among them, the auxiliary frame 441 mainly plays a supporting role. By fixing the auxiliary frame 441 to the support frame 44, the connection between the auxiliary frame 441 and the support frame 44 can be made more reliable and stable, and the auxiliary frame 441 can better play a supporting role. By rotatably connecting the auxiliary frame 441 to the delivery pipe 32, the auxiliary frame 441 can be used to support the delivery pipe 32, so that the delivery pipe 32 can rotate more stably, so that the raw materials can be better mixed.

[0037] As an optional embodiment, Fig. 9As shown, an air intake cavity 45 is formed between the air intake shell 43 and the nozzle 41, and the air intake cavity 45 is constructed as an annular structure coaxial with the nozzle 41. In other words, there is a gap between the nozzle 41 and the air intake shell 43, and the gap is the air intake cavity 45. The air source can enter the air intake cavity 45 from the air intake pipe 431, and then enter the inside of the nozzle 41 from the air inlet 411. The air intake cavity 45 is constructed as an annular structure coaxial with the nozzle 41, so that the air intake cavity 45 can wrap the nozzle 41 more evenly, so that the air in the air intake cavity 45 can be distributed more evenly in the circumferential direction of the nozzle 41, which is conducive to reducing the pressure difference between the air entering the inside of the nozzle 41 from different air inlets 411, so that the polyurea glue can flow better.

[0038] As an optional embodiment, Figure 7 As shown, the plurality of air inlets 411 are distributed in a circular array about the axis of the nozzle 41. In this way, the distribution of the plurality of air inlets 411 can be more uniform, and the air pressure of the two air inlets 411 in the same radial direction can be balanced in a direction perpendicular to the flow direction of the polyurea adhesive, thereby reducing the contact between the polyurea adhesive and the inner wall of the nozzle 41, and making the flow of the polyurea adhesive smoother.

[0039] As an optional embodiment, Fig. 9 As shown, the air inlet 411 is an inclined structure, and in the direction from the outside to the inside of the nozzle 41, the air inlet 411 is inclined toward one side of the nozzle 42. In other words, the air inlet 411 is inclined toward the flow direction of the polyurea glue, so that when the air enters the nozzle 41 from the air inlet 411, the polyurea glue can be better driven to flow, thereby providing a greater pressure for the polyurea glue, which is beneficial to the injection of the polyurea glue.

[0040] In addition, if Figure 4-Figure 6 As shown, the driving assembly 5 is disposed on the gun housing 1 , and is used to push the two squeezing plates 22 to press the raw materials in the double-tube rubber cartridge 2 into the delivery tube 32 , and drive the delivery tube 32 to rotate.

[0041] Specifically, the driving assembly 5 includes a motor 51, a first transmission shaft 52, a second transmission shaft 53 and two parallel rack plates 54. The axes of the first transmission shaft 52 and the second transmission shaft 53 are parallel to each other and are both rotatably connected in the chamber 111. One end of the first transmission shaft 52 extends into the interior of the gun handle 12 and is fixedly connected to the output end of the motor 51. The first transmission shaft 52 and the second transmission shaft 53 are respectively fixedly connected with a first gear 55 and a second gear 56 that match each other. The first gear 55 and the second gear 56 are respectively matched with the two rack plates 54. The two rack plates 54 correspond one-to-one to the two extrusion plates 22. The two rack plates 54 are slidably connected in the chamber 111 and one end of each rack plate passes through the gun body 11 to selectively cooperate with the corresponding extrusion plates 22.

[0042] It should be noted that the axial direction of the first transmission shaft 52 and the second transmission shaft 53 is perpendicular to the moving direction of the extrusion plate 22, and the moving direction of the two rack plates 54 is the same as the moving direction of the extrusion plate 22. One end of the two rack plates 54 passes through the gun body 11 and selectively cooperates with the corresponding extrusion plate 22, that is, when it is necessary to extrude the raw material in the double-tube rubber cartridge 2, the rack plate 54 can be driven to extrude the extrusion plate 22, so that the raw material in the double-tube rubber cartridge 2 can be extruded.

[0043] Specifically, when in use, the motor 51 is started, and the motor 51 drives the first transmission shaft 52 to rotate. The rotation of the first transmission shaft 52 can drive the second transmission shaft 53 to rotate through the engagement of the first gear 55 and the second gear 56. Since the first gear 55 and the second gear 56 are respectively engaged with the two rack plates 54, the rotation of the first gear 55 and the second gear 56 can drive the two rack plates 54 to rotate in the same direction, and then the two rack plates 54 can extrude the two extrusion plates 22 to achieve the extrusion of the raw materials in the double-tube rubber cylinder 2.

[0044] In addition, the driving assembly 5 also includes a transmission assembly 57, one end of which is connected to the second transmission shaft 53, and the other end of which is connected to the delivery pipe 32, for transmitting the kinetic energy of the first transmission shaft 52 to the delivery pipe 32 to drive the delivery pipe 32 to rotate.

[0045] Specifically, the transmission assembly 57 includes: a third transmission shaft 571 and a transmission rod 572. The third transmission shaft 571 is rotatably connected in the chamber 111, and its axis is parallel to the axis of the second transmission shaft 53. A first pulley assembly 575 is transmission-connected between the second transmission shaft 53 and the third transmission shaft 571. A first bevel gear 573 is fixedly connected to the third transmission shaft 571. The transmission rod 572 is rotationally connected to the gun body 11. One end of the transmission rod 572 extends into the chamber 111 and is fixedly connected to a second bevel gear 574 adapted to the first bevel gear 573. The other end of the transmission rod 572 passes through the connecting plate 131 and is transmission-connected to the conveying pipe 32 by a second pulley assembly 576. It should be noted that the axis of the transmission rod 572 is the same as the moving direction of the extrusion plate 22.

[0046] During use, when the second transmission shaft 53 rotates, the second transmission shaft 53 can drive the third transmission shaft 571 to rotate through the transmission of the first pulley assembly 575. The rotation of the third transmission shaft 571 can drive the transmission rod 572 to rotate through the engagement between the first bevel gear 573 and the second bevel gear 574. The rotation of the transmission rod 572 can drive the conveying pipe 32 to rotate through the transmission of the second pulley assembly 576, thereby achieving the mixing of the two raw materials, thereby improving the performance of the polyurea adhesive.

[0047] As an optional embodiment, Figure 4 As shown, the glue gun for construction engineering further includes a moving plate 6, which is slidably connected in the chamber 111, and the moving plate 6 is fixedly connected to the other ends of the two rack plates 54. The moving plate 6 mainly plays a connecting and supporting role. The other ends of the two rack plates 54 are fixedly connected by the moving plate 6, so that the two rack plates 54 can be connected together, thereby improving the stability between the two rack plates 54. Moreover, the moving plate 6 is slidably connected in the chamber 111, so that the movement of the two rack plates 54 can be more stable, so that the extrusion plate 22 can be better extruded.

[0048] As an optional embodiment, Figure 1 and Figure 2 As shown, the transmission rod 572 is arranged at the bottom of the delivery pipe 32. The transmission rod 572 is arranged at the bottom of the delivery pipe 32, which can reduce the interference between the transmission rod 572 and other components and the external environment, and the arrangement is more reasonable.

[0049] It should be noted that the device also includes a circuit board, which is a prior art.

[0050] The above describes an embodiment of the present embodiment, but the present embodiment is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are merely illustrative and not restrictive. Under the guidance of the present embodiment, ordinary technicians in this field can also make many forms, all of which are within the protection of the present embodiment.

Claims

1. A glue gun for construction engineering, which is used to squeeze out glue in a double-tube glue barrel (2), wherein one end of the double-tube glue barrel (2) is provided with a discharge port (21), and the other end of the double-tube glue barrel (2) is provided with two extrusion plates (22), characterized in that: The construction engineering glue gun comprises: A gun case (1), the gun case (1) comprising a gun body (11) and a gun handle (12) connected to the bottom of the gun body (11), a chamber (111) is provided inside the gun body (11), a mounting frame (13) is provided at one end of the gun body (11), and the mounting frame (13) is used to mount a double-tube rubber cartridge (2); A connecting mixing assembly (3) is connected to the discharge port (21) and is used to mix and transport the raw materials in the double-tube rubber cartridge (2), comprising: a connecting head (31) and a transport pipe (32), one end of the connecting head (31) is fixedly connected to the discharge port (21), and the other end of the connecting head (31) is rotatably connected to one end of the transport pipe (32); An auxiliary injection assembly (4), the auxiliary injection assembly (4) is connected to the other end of the conveying pipe (32) and is used to pressurize and spray the mixed raw materials, and comprises: a nozzle (41), a nozzle (42), an air intake shell (43) and a support frame (44), one end of the nozzle (41) is rotatably connected to the other end of the conveying pipe (32), the other end of the nozzle (41) is connected to the nozzle (42), a plurality of air intake ports (411) are provided on the nozzle (41), the air intake shell (43) is arranged on the nozzle (41) and wraps the plurality of air intake ports (411), an air intake pipe (431) connected to the plurality of air intake ports (411) is arranged on the air intake shell (43), and the two ends of the support frame (44) are fixedly connected to the discharge port (21) and the nozzle (41), respectively; A driving assembly (5), the driving assembly (5) being arranged on the gun housing (1) and used for pushing the two extrusion plates (22) to press the raw materials in the double-tube rubber cartridge (2) into the conveying tube (32) and drive the conveying tube (32) to rotate; the driving assembly (5) comprises: a motor (51), a first transmission shaft (52), a second transmission shaft (53) and two mutually parallel rack plates (54), the axes of the first transmission shaft (52) and the second transmission shaft (53) being parallel to each other and both being rotatably connected in the chamber (111), one end of the first transmission shaft (52) extending into the The gun handle (12) is fixedly connected to the output end of the motor (51), and the first transmission shaft (52) and the second transmission shaft (53) are respectively fixedly connected with a first gear (55) and a second gear (56) that match each other. The first gear (55) and the second gear (56) are respectively matched with the two rack plates (54). The two rack plates (54) correspond to the two extrusion plates (22) one by one. The two rack plates (54) are slidably connected in the chamber (111) and one end of each of them passes through the gun body (11) and selectively matches with the corresponding extrusion plate (22); The invention also comprises a transmission assembly (57), one end of which is connected to the second transmission shaft (53), and the other end of which is connected to the delivery pipe (32), and is used for transmitting the kinetic energy of the first transmission shaft (52) to the delivery pipe (32), so as to drive the delivery pipe (32) to rotate.

2. A glue gun for construction engineering according to claim 1, characterized in that: The mounting frame (13) comprises a connecting plate (131) and a plurality of connecting rods (132), the two ends of the plurality of connecting rods (132) being respectively connected to the gun housing (1) and the connecting plate (131), and a mounting cavity is defined between the gun housing (1), the connecting plate (131) and the plurality of connecting rods (132), and the double-tube rubber cartridge (2) is mounted in the mounting cavity.

3. A glue gun for construction engineering according to claim 2, characterized in that: The transmission assembly (57) comprises: a third transmission shaft (571) and a transmission rod (572); the third transmission shaft (571) is rotatably connected in the chamber (111), and its axis is parallel to the axis of the second transmission shaft (53); a first pulley assembly (575) is transmission-connected between the second transmission shaft (53) and the third transmission shaft (571); a first bevel gear (573) is fixedly connected to the third transmission shaft (571); the transmission rod (572) is rotatably connected to the gun body (11); one end of the transmission rod (572) extends into the chamber (111) and is fixedly connected to a second bevel gear (574) adapted to the first bevel gear (573); the other end of the transmission rod (572) passes through the connecting plate (131) and is transmission-connected to the conveying pipe (32) via a second pulley assembly (576).

4. A glue gun for construction engineering according to claim 1, characterized in that: An auxiliary frame (441) is fixedly connected to the support frame (44), and the auxiliary frame (441) is rotatably connected to the conveying pipe (32).

5. A caulking gun for construction engineering according to claim 1, characterized in that: An air intake cavity (45) is formed between the air intake shell (43) and the nozzle (41), and the air intake cavity (45) is constructed as an annular structure coaxial with the nozzle (41).

6. A glue gun for construction engineering according to claim 5, characterized in that: The plurality of air inlets (411) are distributed in a circular array about the axis of the nozzle (41).

7. A glue gun for construction engineering according to claim 6, characterized in that: The air inlet (411) is an inclined structure; in a direction from the outside to the inside of the nozzle (41), the air inlet (411) is inclined toward one side of the nozzle (42).

8. A glue gun for construction engineering according to claim 2, characterized in that: The glue gun for construction engineering further comprises: a moving plate (6), wherein the moving plate (6) is slidably connected in the chamber (111), and the moving plate (6) is fixedly connected to the other ends of the two rack plates (54).

9. A glue gun for construction engineering according to claim 3, characterized in that: The transmission rod (572) is arranged at the bottom of the conveying pipe (32).

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