Multistage rod type charging gun

Abstract

The multi-stage rod type charging gun comprises a multi-stage driving rod, a valve head and a multi-stage charging pipe, the valve head is installed at the lower end of the multi-stage driving rod, the multi-stage driving rod is installed in the multi-stage charging pipe, and the multi-stage charging pipe comprises a driving pipe, a three-way charging pipe and a gun pipe. The driving pipe is connected with the gun barrel at the bottom through a straight pipe of the three-way charging pipe; the multi-stage driving rod comprises a driving main rod, a driving auxiliary rod and a driven rod; a corrugated pipe is installed between the driving main rod and the driving auxiliary rod, the top of the corrugated pipe is connected with the driving pipe in a sealed mode, and the driving auxiliary rod moves between the driving pipe and the three-way material filling pipe. The multi-stage rod type charging gun provided by the utility model meets the design requirement of a novel corrugated pipe mounting structure, and an original two-stage driving rod is adjusted into a three-stage driving rod, so that the corrugated pipe can be clamped and sealed, and the multi-stage rod type charging gun adapts to the gas volume change in the telescopic process of the corrugated pipe.

Description

Technical Field

[0001] This utility model relates to the field of filling machines, and in particular to multi-stage rod-type filling guns. Background Technology

[0002] The applicant filed a utility model patent application in 2023 with patent application number 2023219372528 and invention name "Material Filling Gun". Although the technical solution of the patent adopts a corrugated tube (i.e., the sealing tube in the patent) structure, the corrugated tube is open, so only one main rod 41 and one connecting rod 42 are needed to achieve the drive, which is a two-rod drive structure.

[0003] Therefore, the applicant has applied for a barrel air-tight structure for an explosion-proof filling gun. The technical solution of this application uses a bellows with a different structure. However, the existing two-bar drive structure cannot be used to achieve the same result. Therefore, it is necessary to design the drive structure of the filling gun based on the new bellows structure. Utility Model Content

[0004] The technical problem to be solved by this utility model embodiment is to provide a multi-stage rod-type filling gun, which solves the problem that the traditional two-rod drive structure cannot meet the requirements of the new bellows structure.

[0005] To solve the above-mentioned technical problems, this utility model provides a multi-stage rod-type filling gun, including a multi-stage drive rod, a valve head, and a multi-stage filling tube. The valve head is installed at the lower end of the multi-stage drive rod, which is installed in the multi-stage filling tube. The multi-stage filling tube includes a drive tube, a three-way filling tube, and a gun barrel. The drive tube is connected to the gun barrel at the bottom through a straight section of the three-way filling tube. The multi-stage drive rod includes a main drive rod, a secondary drive rod, and a driven rod. A bellows is installed between the main drive rod and the secondary drive rod, and the top of the bellows is sealed to the drive tube. The secondary drive rod moves between the drive tube and the three-way filling tube.

[0006] The side tube of the three-way filling tube is connected to the feeding tube.

[0007] Two guide support blocks arranged in a cross shape are provided on the driven rod, and both ends of each guide support block are slidably connected to the inner wall of the gun barrel.

[0008] The two guide support blocks are located near the valve head, and the distance between them and the valve head is greater than the length of the extension and retraction stroke of the multi-stage drive rod, so that the two guide support blocks are both located inside the barrel during the extension and retraction movement of the multi-stage drive rod.

[0009] A limiting sleeve is also installed between the drive tube and the three-way filling tube. The drive auxiliary rod passes through the center of the limiting sleeve, so that the drive auxiliary rod is slidably connected to the limiting sleeve. An air hole is opened on the limiting sleeve.

[0010] The top surface of the limiting sleeve is adapted to the bottom shape of the bellows, both being conical structures.

[0011] The bottom of the valve head is conical, and notches are machined on both sides of the valve head to form a straight cross-section.

[0012] The multi-stage rod-type filling gun provided by this utility model meets the design requirements of a new bellows installation structure. It adjusts the original two-stage drive rod to a three-stage drive rod, thereby clamping and sealing the bellows and adapting to the gas volume changes during the expansion and contraction of the bellows. While completing the multi-stage drive structure, it can also effectively ensure the stability of the drive rod transmission. In particular, through the guiding and limiting function of the limiting sleeve, the drive auxiliary rod can be driven stably. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the overall structure of the new type of corrugated pipe.

[0014] Figure 2 This is a 3D view of a multi-stage rod-type filling gun.

[0015] Figure 3 This is a cross-sectional view of a multi-stage rod-type charging gun.

[0016] Figure 4 This is a three-dimensional view of a multi-stage drive rod.

[0017] In the picture:

[0018] 1. Multi-stage drive rod; 11. Main drive rod; 12. Secondary drive rod; 13. Driven rod; 131. Guide support block; 14. Bellows;

[0019] 2. Valve head;

[0020] 3. Multi-stage filling tube; 31. Drive tube; 32. Three-way filling tube; 33. Gun barrel; 34. Limiting sleeve. Detailed Implementation

[0021] To make the above-mentioned objects, features, and advantages of this utility model more apparent and understandable, the specific embodiments of this utility model will be described in detail below with reference to the accompanying drawings. Many specific details are set forth in the following description to provide a full understanding of this utility model. However, this utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar modifications without departing from the spirit of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed below.

[0022] like Figure 1-4As shown, this utility model provides a multi-stage rod-type filling gun, including a multi-stage drive rod 1, a valve head 2, and a multi-stage filling tube 3. The valve head 2 is installed at the lower end of the multi-stage drive rod 1, and the multi-stage drive rod 1 is installed in the multi-stage filling tube 3. The multi-stage filling tube 3 includes a drive tube 31, a three-way filling tube 32, and a gun barrel 33. The drive tube 31 is connected to the bottom gun barrel 33 through the straight tube of the three-way filling tube 32. The multi-stage drive rod 1 includes a drive main rod 11, a drive auxiliary rod 12, and a driven rod 13. A bellows 14 is installed between the drive main rod 11 and the drive auxiliary rod 12, and the top of the bellows 14 is sealed to the drive tube 31. The drive auxiliary rod 12 moves between the drive tube and the three-way filling tube 32.

[0023] The side tube of the three-way filling tube 32 is connected to the feeding tube.

[0024] Two guide support blocks 131 arranged in a cross shape are provided on the driven rod 13, and the two ends of each guide support block 131 are slidably connected to the inner wall of the gun barrel.

[0025] The two guide support blocks 131 are located near the valve head, and the distance between them is greater than the length of the extension and retraction stroke of the multi-stage drive rod, so that the two guide support blocks are both located inside the barrel during the extension and retraction movement of the multi-stage drive rod.

[0026] A limiting sleeve 34 is also installed between the drive tube 31 and the three-way filling tube 32. The drive auxiliary rod passes through the center of the limiting sleeve, so that the drive auxiliary rod is slidably connected to the limiting sleeve. An air hole is opened on the limiting sleeve.

[0027] The top surface shape of the limiting sleeve 34 is adapted to the bottom shape of the bellows, both being conical structures.

[0028] The bottom of the valve head 2 is conical, and notches are machined on both sides of the valve head to form a straight cross-section.

[0029] The multi-stage rod-type filling gun provided by this utility model meets the design requirements of a new bellows installation structure. It adjusts the original two-stage drive rod to a three-stage drive rod, thereby clamping and sealing the bellows and adapting to the gas volume changes during the expansion and contraction of the bellows. While completing the multi-stage drive structure, it can also effectively ensure the stability of the drive rod transmission. In particular, through the guiding and limiting function of the limiting sleeve, the drive auxiliary rod can be driven stably.

[0030] The technical features of the above embodiments can be combined in any way. For the sake of brevity, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this specification.

[0031] The above embodiments only illustrate several implementation methods of this utility model, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of the utility model patent. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of this utility model, and these all fall within the protection scope of this utility model. Therefore, the protection scope of this utility model patent should be determined by the appended claims.

Claims

1. A multi-stage rod-type filling gun, comprising a multi-stage drive rod, a valve head, and a multi-stage filling tube, characterized in that, The valve head is installed at the lower end of the multi-stage drive rod, which is installed in the multi-stage filling tube. The multi-stage filling tube includes a drive tube, a three-way filling tube, and a gun barrel. The drive tube is connected to the gun barrel at the bottom through a straight section of the three-way filling tube. The multi-stage drive rod includes a main drive rod, a secondary drive rod, and a driven rod. A bellows is installed between the main drive rod and the secondary drive rod, and the top of the bellows is sealed to the drive tube. The secondary drive rod moves between the drive tube and the three-way filling tube.

2. The multi-stage rod-type filling gun according to claim 1, characterized in that, The side tube of the three-way filling tube is connected to the feeding tube.

3. The multi-stage rod-type filling gun according to claim 1, characterized in that, The driven rod is also provided with two cross-shaped guide support blocks, and the two ends of each guide support block are slidably connected to the inner wall of the barrel.

4. The multi-stage rod-type filling gun according to claim 1, characterized in that, The two guide support blocks are located near the valve head, and the distance between them and the valve head is greater than the length of the extension and retraction stroke of the multi-stage drive rod, so that the two guide support blocks are both located inside the barrel during the extension and retraction movement of the multi-stage drive rod.

5. The multi-stage rod-type filling gun according to claim 1, characterized in that, A limiting sleeve is also installed between the drive tube and the three-way filling tube. The drive auxiliary rod passes through the center of the limiting sleeve, so that the drive auxiliary rod is slidably connected to the limiting sleeve. An air hole is opened on the limiting sleeve.

6. The multi-stage rod-type filling gun according to claim 5, characterized in that, The top surface of the limiting sleeve is adapted to the bottom shape of the bellows, both being conical structures.

7. The multi-stage rod-type filling gun according to claim 1, characterized in that, The bottom of the valve head is conical, and notches are machined on both sides of the valve head to form a straight cross-section.

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