Novel thermal shrinkage gun

Abstract

The novel thermal shrinkage gun comprises a handle assembly and a venturi tube assembly, the handle assembly is provided with the venturi tube assembly, the venturi tube assembly comprises a first tube body and a second tube body which are connected, a trumpet-shaped tube opening is formed in the tail end of the second tube body located on the rear portion, and an air inlet nozzle is arranged in the tube opening cavity. The thermal shrinkage gun is characterized in that a gas inlet nozzle is arranged on the periphery of a shell of the thermal shrinkage gun body, supporting legs are arranged on the periphery wall of the shell of the gas inlet nozzle and connected with the cavity wall of a pipe cavity, a notch is formed in the position, below the gas inlet nozzle, of the cavity wall of the pipe cavity, and a gas inlet pipeline is arranged at the notch and communicated with the gas inlet nozzle. The air inlet nozzle is directly fixed in the tail end pipe opening of the second pipe body in the Venturi pipe assembly through the supporting legs, the air inlet nozzle does not need to be supported by a handle assembly, the length of the thermal shrinkage gun is shortened, and use is convenient.

Description

Technical Field

[0001] The utility model relates to the technical field of heat drying devices, in particular to a novel heat shrink gun. Background Art

[0002] Heat shrink guns are widely used in packaging and other fields. Taking gas-type heat shrink guns as an example, their common components include a handle assembly, a venturi tube assembly, a combustion nozzle, an igniter mechanism, etc. The venturi tube assembly is installed at the top of the handle assembly, the combustion nozzle is installed at the air outlet of the venturi tube assembly, and the igniter mechanism is installed at the combustion nozzle. The venturi tube is generally composed of two sections of the front and rear tube body. The air intake nozzle is fixed on the handle part corresponding to the tail end of the rear tube body, and the air intake nozzle is used to transport gas into the tube body cavity. The handle directly supports the air intake nozzle, which makes the overall gun body length larger, which is inconvenient to use in some working areas and needs to be improved. Utility Model Content

[0003] In order to solve at least one of the above technical defects, the utility model provides the following technical solutions:

[0004] The present application document discloses a novel heat shrink gun, comprising a handle assembly and a venturi tube assembly. The venturi tube assembly is arranged on the handle assembly, and the venturi tube assembly comprises a tube body 1 and a tube body 2 connected to each other. The tail end of the tube body 2 at the rear is provided with a trumpet-shaped tube mouth, an air intake nozzle is arranged in the tube mouth, and a support leg is arranged on the peripheral wall of the shell of the air intake nozzle, and the support leg is connected to the wall of the tube mouth, a notch is arranged on the wall of the tube mouth below the air intake nozzle, an air intake pipe is arranged at the notch, and the air intake pipe is connected to the air intake nozzle.

[0005] In this solution, the structure of the heat shrink gun is improved, and the air inlet nozzle is directly fixed to the tail end pipe opening of the tube body 2 in the Venturi tube assembly through the support legs. There is no need for a handle assembly to support the air inlet nozzle, which helps to shorten the length of the heat shrink gun and facilitates use.

[0006] Furthermore, legs are arranged at circumferential intervals on the peripheral wall of the shell of the air intake nozzle, a cavity is arranged in the leg below the shell and the end of the air intake pipe is connected with the inlet of the cavity, the outlet of the cavity is connected with the air intake port at the shell, and the cavity formed in the leg facilitates the connection between the air intake pipe and the air intake nozzle and facilitates assembly.

[0007] Furthermore, the legs are distributed in a triangular shape to improve the stability of the support.

[0008] Furthermore, a support block is arranged on the cavity wall at the pipe mouth, and the end of the leg abuts the support block. Fixing holes are arranged on the support block and the corresponding cavity wall of the pipe mouth, and threaded holes are arranged at the ends of the legs corresponding to the fixing holes, so that fasteners extend from the fixing holes and engage with the threaded holes to be connected. Adding the support block facilitates stable abutment with the legs, and the fasteners cooperate with the threaded holes to better fix the legs.

[0009] Furthermore, a limit block is provided at the cavity wall in front of the support block, and the peripheral surface of the end of the support leg abuts against the limit block. When the air intake nozzle is installed, the limit block abuts against the support leg to limit movement, which is convenient for subsequent fastening.

[0010] Compared with the prior art, the utility model has the following beneficial effects:

[0011] 1. The utility model designs the structure of the heat shrink gun, and the air inlet nozzle is directly fixed in the tail end pipe opening of the venturi tube assembly, eliminating the supporting part of the handle assembly, which helps to shorten the length of the heat shrink gun and is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0013] Figure 1 It is a schematic diagram of the structure of the novel heat shrink gun in Example 1;

[0014] Figure 2 is a schematic diagram of the installation structure of the air inlet nozzle in Example 1;

[0015] Wherein, the accompanying drawings are marked as follows:

[0016] 1. Handle assembly; 2. Venturi tube assembly; 3. Combustion nozzle; 4. Mask; 5. Ignition mechanism; 6. Fasteners; 7. Intake nozzle; 8. Legs; 9. Support block; 10. Grip; 11. Trigger; 12. Protective frame; 13. Limit block; 14. Intake duct; 21. Tube body one; 22. Tube body two; 23. Notch; 81. Cavity. DETAILED DESCRIPTION

[0017] The utility model is further described below in conjunction with the accompanying drawings and specific embodiments.

[0018] Example 1

[0019] like Figure 1 , Figure 2As shown, in this example, the novel heat shrink gun includes a handle assembly 1 and a venturi tube assembly 2. The handle assembly 1 is a common pistol-type grip 10 and is equipped with a trigger 11. A valve, an air inlet nozzle and other mechanisms are installed in the grip 10 cavity. The venturi tube assembly 2 is a common two-end tube assembly structure. The front is a tube body 1 21, and a tube body 22 is installed at the tail end of the tube body 1 21. The tail end of the tube body 22 is in a trumpet shape, and a combustion nozzle 3 is installed at the head end of the tube body 1 21. An igniter mechanism 5 and a mask 4 are installed on the combustion nozzle 3. The igniter mechanism 5 is connected to the trigger 11, and a protective frame 12 can be optionally installed in front of the trigger. After the gas enters the combustion nozzle cavity, the trigger is pulled to start the igniter mechanism to burn the gas in the combustion nozzle.

[0020] The improvements in this example are as follows: an air intake nozzle 7 is installed in the trumpet-shaped tube cavity at the rear end of the tube body 22, and a support leg 8 is integrally formed on the peripheral wall of the shell of the air intake nozzle 7. The support legs 8 are distributed in a triangular shape along the circumferential direction, and the support legs 8 extend radially along the shell of the air intake nozzle 7. The ends of the support legs 8 are connected to the wall of the tube cavity. Under this structure, the air intake nozzle does not need to be supported by the handle assembly, which helps to shorten the length of the heat shrink gun and is convenient to use.

[0021] like Figure 2 As shown, a notch 23 is formed at the wall of the nozzle cavity below the air intake nozzle 7, and an air intake pipe 14 is installed at the notch 23. For example, one end of the air intake pipe 14 is connected to a flow channel formed in the lower peripheral wall of the tube body 22, one end of the flow channel is connected to the air intake nozzle at the handle, and the other end of the flow channel is connected to the air intake pipe. For example, the end of the air intake pipe is inserted into the flow channel cavity, and the other end of the air intake pipe 14 extends from the notch 23 and is connected to the air intake nozzle 7.

[0022] As for the connection between the air intake pipe and the air intake nozzle, if a cavity 81 is preformed in the support leg 8 under the shell, the end of the air intake pipe 14 extends from the notch 23 and is inserted into the entrance of the cavity to form a connection, the outlet of the cavity 81 corresponds to and is connected with the air intake at the shell, and the combustion gas flowing into the air intake pipe 14 flows into the flow channel of the air intake nozzle 7 through the cavity in the support leg 8, and then is sprayed into the two cavities of the tube body.

[0023] To facilitate the docking of the legs, in this example, a support block 9 is formed on the cavity wall at the pipe mouth. The top surface of the support block 9 is horizontal to better abut the leg. The end of the leg 8 abuts the support block 9. A through hole, i.e., a fixing hole, is formed on the support block 9 and the corresponding cavity wall of the pipe mouth. A threaded hole is formed at the end of the leg corresponding to the fixing hole. Bolts are used as fasteners 6. After the leg is installed in place, the bolts are extended from the fixing holes and engaged with the threaded holes to complete the fixation. Note that only the upper leg is fixed by the fasteners, and the lower leg does not need to be fixed.

[0024] In addition, a limit block 13 can be formed at the cavity wall in front of the support block 9. The limit block 13 is higher than the support block 9. The end circumference of the support leg 8 abuts against the limit block 13. When the air intake nozzle is installed, the limit block abuts against the support leg until it cannot move forward. The support leg is installed in place and fixed with fasteners.

[0025] The above are only preferred implementations of the utility model. The protection scope of the utility model is not limited to the above embodiments. All technical solutions under the idea of ​​the utility model belong to the protection scope of the utility model. It should be pointed out that for ordinary technicians in this technical field, some improvements and modifications without departing from the principle of the utility model should also be regarded as the protection scope of the utility model.

Claims

1. A novel heat shrink gun, comprising a handle assembly (1) and a venturi tube assembly (2), wherein the handle assembly (1) is provided with the venturi tube assembly (2), wherein the venturi tube assembly (2) comprises a first tube body (21) and a second tube body (22) connected to each other, wherein the second tube body (22) at the rear has a trumpet-shaped tube opening at its rear end, and wherein: An air intake nozzle (7) is arranged in the cavity of the pipe, a support leg (8) is arranged on the peripheral wall of the shell of the air intake nozzle (7), the support leg (8) is connected to the cavity wall of the pipe, a notch (23) is arranged on the cavity wall below the air intake nozzle (7), an air intake pipe (14) is arranged at the notch (23), and the air intake pipe (14) is connected to the air intake nozzle (7).

2. The novel heat shrink gun according to claim 1, characterized in that: The peripheral wall of the shell of the air intake nozzle (7) is provided with supporting legs (8) at intervals along the circumferential direction, a cavity (81) is provided in the supporting legs (8) below the shell, and the end of the air intake pipe (14) is connected to the cavity inlet, and the outlet of the cavity (81) is connected to the air intake port of the shell.

3. The novel heat shrink gun as claimed in claim 2, characterized in that: The supporting legs (8) are distributed in a triangular shape.

4. The novel heat shrink gun according to claim 1, characterized in that: A support block (9) is arranged on the cavity wall at the pipe mouth, and the end of the support leg (8) abuts against the support block (9). A fixing hole is arranged on the support block and the corresponding cavity wall of the pipe mouth, and a threaded hole is arranged at the end of the support leg corresponding to the fixing hole, so that a fastener (6) extends from the fixing hole and is engaged with the threaded hole for connection.

5. The novel heat shrink gun as claimed in claim 4, characterized in that: A limit block (13) is provided at the cavity wall in front of the support block (9), and the peripheral surface of the end of the support leg (8) abuts against the limit block (13).

Images