Gun barrel air-tight sealing structure of anti-explosion charging gun

Abstract

The gun barrel air-tight sealing structure of the anti-explosion charging gun comprises a driving main rod, a driving auxiliary rod, a driving pipe, a charging pipe, a corrugated pipe and a fixing sleeve, the lower portion of the driving main rod is connected with the driving auxiliary rod, the corrugated pipe is connected to the driving main rod in a sleeved mode, and the lower end of the corrugated pipe is clamped and sealed by the driving main rod and the driving auxiliary rod; the lower end of the driving pipe is in butt joint with the material filling pipe. The driving main rod and the driving auxiliary rod are located in a pipe cavity formed by butt joint of the driving pipe and the material filling pipe. And the top of the corrugated pipe is clamped by the fixing sleeve and the driving pipe, so that the corrugated pipe is hermetically connected with the top of the driving pipe. According to the gun barrel airtight sealing structure of the anti-explosion charging gun, the bottom of the corrugated pipe is connected with the driving main rod in a sealed mode, and the top of the fixing sleeve is further sealed with the driving main rod through the sealing ring, so that dust outside the driving main rod can be prevented from falling into the corrugated pipe; and materials in the charging gun can be completely prevented from leaking through the driving main rod due to pressure.

Description

Technical Field

[0001] This utility model relates to the field of filling machines, and in particular to the air-tight structure of the gun barrel of an explosion-proof filling gun. Background Technology

[0002] The applicant filed a utility model patent application in 2023 with patent number 2023219372528, entitled "Material Filling Gun." The patent's technical solution employs a corrugated pipe structure called a sealing tube 70. The upper end of the sealing tube is sealed to the valve stem via a locking ring 71, while the lower end is fixed within the pipe wall. This structure has been validated in application; however, material can still enter the sealing tube, and this material is highly likely to accumulate inside the sealing tube over a long period, leading to contamination. Furthermore, the upper part is sealed only by a single locking ring, essentially a standalone sealing structure. If the pressure inside the filling gun becomes too high, it may break through the sealing limitation of the locking ring 71, posing a risk of material leakage through the upper end of the gun stem. Utility Model Content

[0003] The technical problem to be solved by this utility model embodiment is to provide a gun barrel air-sealing structure for an explosion-proof filling gun, which solves the problem that the existing sealing structure is simple and easily breaks through the sealing limit when encountering high pressure filling, thus leading to leakage.

[0004] To solve the above-mentioned technical problems, this utility model provides a gas-tight structure for the barrel of an explosion-proof filling gun, including a main drive rod, a secondary drive rod, a drive tube, a filling tube, a bellows, and a fixing sleeve, wherein: the lower part of the main drive rod is connected to the secondary drive rod, the bellows is sleeved on the main drive rod, and the lower end of the bellows is clamped and sealed by the main drive rod and the secondary drive rod; the lower end of the drive tube is connected to the filling tube, and the main drive rod and the secondary drive rod are located in the cavity formed by the connection of the drive tube and the filling tube; the top of the bellows is clamped by the fixing sleeve and the drive tube, so that the top of the bellows and the drive tube are sealed together.

[0005] The bellows adopts an integrated structure and is made of elastic material. The top of the bellows is a fixed ring with a flat structure, and the bottom of the bellows is a conical surface with a through hole in the center. A screw that connects and locks the main drive rod and the auxiliary drive rod passes through the through hole and clamps and seals the bottom of the bellows.

[0006] The bottom of the main drive rod is provided with a screw, and the top of the auxiliary drive rod is provided with an internal threaded hole. The screw is locked to the internal threaded hole.

[0007] The upper part of the fixed sleeve is also provided with a sealing ring, which is sleeved on the drive main rod and has a sliding sealing connection with the drive main rod.

[0008] An air inlet pipe is also provided on the side wall of the fixed sleeve, and the air inlet of the air inlet pipe is located between the fixed ring and the sealing ring of the bellows.

[0009] A limiting seat is also clamped between the drive tube and the filling tube. The drive auxiliary rod passes through the limiting seat, and the limiting seat is provided with at least one air hole in its circumference.

[0010] The upper surface of the limiting seat is a concave inner conical surface, the shape of which is adapted to the conical surface at the bottom of the bellows.

[0011] The explosion-proof filling gun barrel air-sealing structure provided by this utility model has a bellows bottom that is sealed to the drive rod and moves synchronously with the drive rod. The top of the bellows is pressed and sealed against the inner wall of the drive tube, so that the bellows expands and contracts adaptively as the drive rod moves. Since the top of the fixed sleeve is also sealed to the drive rod through a sealing ring, dust outside the drive rod can be prevented from falling into the bellows. A long, elastically expandable sealing structure is formed between the bellows and the drive rod, which can completely prevent the material in the filling gun from leaking through the drive rod due to pressure. Attached Figure Description

[0012] Figure 1 This is a schematic diagram of the overall structure of the explosion-proof filling gun of this utility model.

[0013] Figure 2 for Figure 1 A magnified view of a portion of the image.

[0014] Figure 3 This is a schematic diagram of the compressed state of a bellows.

[0015] Figure 4 This is a schematic diagram of the bellows in its elongated state.

[0016] In the picture:

[0017] 1. Drive main rod; 2. Drive auxiliary rod; 3. Drive tube; 4. Filling tube; 5. Corrugated tube; 6. Fixing sleeve; 7. Limiting seat; 71. Air hole; Detailed Implementation

[0018] 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.

[0019] like Figure 1-4 As shown, this utility model provides an airtight structure for the barrel of an explosion-proof filling gun, including a main drive rod 1, a secondary drive rod 2, a drive tube 3, a filling tube 4, a bellows tube 5, and a fixing sleeve 6. The lower part of the main drive rod 1 is connected to the secondary drive rod 2. The bellows tube 5 is sleeved on the main drive rod 1, and its lower end is clamped and sealed by the main drive rod 1 and the secondary drive rod 2. The lower end of the drive tube 3 is connected to the filling tube 4. The main drive rod 1 and the secondary drive rod 2 are located in the cavity formed by the connection of the drive tube 3 and the filling tube 4. The top of the bellows tube 5 is clamped by the fixing sleeve and the drive tube 3, thus sealing the top of the bellows tube 5 and the top of the drive tube 3.

[0020] The filling pipe 4 has a three-way pipe structure, in which the part that accommodates the drive rod is a vertical pipe, which is also directly connected to the drive pipe. There is also a bypass pipe for filling, which is connected to the feeding pipe. The structure of the drive pipe 3 defines the drive space, so that the bellows 5 can extend and retract within the drive pipe 3, and stops when it reaches the bottom limit seat 7.

[0021] like Figure 3-4 As shown, the bellows 5 adopts an integral structure and is made of elastic material. The top of the bellows 5 is a fixed ring with a planar structure, the bottom of the bellows is a conical surface, and a through hole is provided in the center. The screw that connects and locks between the main drive rod 1 and the auxiliary drive rod 2 passes through the through hole and clamps and seals the bottom of the bellows.

[0022] The bottom of the main drive rod 1 is provided with a screw, and the top of the auxiliary drive rod 2 is provided with an internal threaded hole. The screw is locked into the internal threaded hole. Through the connection of the main drive rod 1 and the auxiliary drive rod 2, the bottom of the bellows 5 is fixed and the bellows is sealed to the main drive rod 1.

[0023] The diameter of the main drive rod 1 is larger than that of the auxiliary drive rod, and the mating surfaces of both the main drive rod and the auxiliary drive rod are set as planes, thereby pressing the bottom of the bellows 5 tightly to achieve a seal.

[0024] The upper part of the fixed sleeve 6 is also provided with a sealing ring, which is sleeved on the drive main rod and has a sliding sealing connection with the drive main rod.

[0025] An air inlet pipe is also provided on the side wall of the fixed sleeve 6, and the air inlet of the air inlet pipe is located between the fixed ring and the sealing ring of the corrugated pipe.

[0026] A limiting seat 7 is also clamped between the drive tube 3 and the filling tube 4. The limiting seat 7 has a through hole in its center. The drive auxiliary rod passes through the limiting seat 7. The limiting seat has at least one air hole in its circumference. The design of the air hole can adapt to the volume change between the bellows and the drive tube caused by the expansion and contraction of the bellows 5. When the bellows extends downward, the gas is squeezed out from the drive tube to the filling tube through the air hole 71. When the bellows contracts upward, the gas is drawn into the drive tube from the filling tube through the air hole.

[0027] The limit seat 7 also serves as a guide for the drive linkage. The drive linkage has a uniform diameter at both the top and bottom.

[0028] The upper surface of the limiting seat 7 is a concave inner conical surface, the shape of which is adapted to the conical surface at the bottom of the bellows.

[0029] The explosion-proof filling gun barrel air-sealing structure provided by this utility model has a bellows bottom that is sealed to the drive rod and moves synchronously with the drive rod. The top of the bellows is pressed and sealed against the inner wall of the drive tube, so that the bellows expands and contracts adaptively as the drive rod moves. Since the top of the fixed sleeve is also sealed to the drive rod through a sealing ring, dust outside the drive rod can be prevented from falling into the bellows. A long, elastically expandable sealing structure is formed between the bellows and the drive rod, which can completely prevent the material in the filling gun from leaking through the drive rod due to pressure.

[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 gas-tight structure for the barrel of an explosion-proof filling gun, characterized in that, The device includes a main drive rod, a secondary drive rod, a drive tube, a filling tube, a bellows, and a fixing sleeve. The lower part of the main drive rod is connected to the secondary drive rod. The bellows is sleeved on the main drive rod, and its lower end is clamped and sealed by the main drive rod and the secondary drive rod. The lower end of the drive tube is connected to the filling tube. The main drive rod and the secondary drive rod are located within the cavity formed by the connection of the drive tube and the filling tube. The top of the bellows is clamped by the fixing sleeve and the drive tube, creating a sealed connection between the tops of the bellows and the drive tube.

2. The gas-tight structure of the gun barrel of the explosion-proof filling gun according to claim 1, characterized in that, The bellows adopts an integrated structure and is made of elastic material. The top of the bellows is a fixed ring with a flat structure, and the bottom of the bellows is a conical surface with a through hole in the center. A screw that connects and locks the main drive rod and the auxiliary drive rod passes through the through hole and clamps and seals the bottom of the bellows.

3. The gas-tight structure of the gun barrel of the explosion-proof filling gun according to claim 1, characterized in that, The bottom of the main drive rod is provided with a screw, and the top of the auxiliary drive rod is provided with an internal threaded hole. The screw is locked to the internal threaded hole.

4. The gas-tight structure of the gun barrel of the explosion-proof filling gun according to claim 1, characterized in that, The upper part of the fixed sleeve is also provided with a sealing ring, which is sleeved on the drive main rod and has a sliding sealing connection with the drive main rod.

5. The gas-tight structure of the gun barrel of the explosion-proof filling gun according to claim 4, characterized in that, An air inlet pipe is also provided on the side wall of the fixed sleeve, and the air inlet of the air inlet pipe is located between the fixed ring and the sealing ring of the bellows.

6. The gas-tight structure of the gun barrel of the explosion-proof filling gun according to claim 1, characterized in that, A limiting seat is also clamped between the drive tube and the filling tube. The drive auxiliary rod passes through the limiting seat, and the limiting seat is provided with at least one air hole in its circumference.

7. The gas-tight structure of the gun barrel of the explosion-proof filling gun according to claim 6, characterized in that, The upper surface of the limiting seat is a concave inner conical surface, the shape of which is adapted to the conical surface at the bottom of the bellows.

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