Cavity sealing tool

Abstract

The utility model relates to a cavity sealing tool which comprises a rear end check block, a first end check block and a second end check block, the rear end check block is provided with a groove and a first through hole, and the first through hole is formed in the groove; the mandrel screw is provided with a limiting pin and a screw head, the mandrel screw is provided with a sealing section between the limiting pin and the screw head, the sealing section penetrates through the first through hole, and the limiting pin abuts against the interior of the groove; the expansion piece is arranged on the sealing section in a sleeving mode, and when the screw head is close to the rear end check block, the expansion piece is extruded by the screw head and then expands; according to the utility model, the cavity channel plugging effect is improved, the damage to workpieces can be avoided, and the assembly efficiency is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of sealing, in particular to a cavity sealing tool. Background Art

[0002] In traditional processing enterprises, many workpieces need to be cleaned to meet the cleanliness requirements. Some workpieces need to be cleaned multiple times during the entire process to meet the requirements of different processes. A workpiece currently needs to be friction welded to form a sealed cooling water chamber; the workpiece needs to be cleaned once after processing to ensure the cleanliness requirements of the internal water chamber. Only after the cleaning is completed can the two cover plates be welded to the workpiece to form a sealed cooling water chamber. After the welding is completed, other parts of the workpiece are processed and cleaned. In order to prevent impurities such as cutting fluid and aluminum chips from entering the cooling water chamber, the inlet and outlet of the cooling water chamber need to be sealed.

[0003] The workpiece needs to enter the cleaning machine for cleaning. During the cleaning process, negative pressure needs to be drawn to remove water vapor. Ordinary rubber plugs can only solve the sealing of the water cavity under positive pressure or no pressure difference. Therefore, the existence of pressure difference will cause the rubber plug to fall off. When the workpiece enters the vacuum pool of the cleaning machine, the gas outside the workpiece is vacuumed, while the water cavity of the workpiece is still at atmospheric pressure. In this way, the pressure difference will blow out the rubber plug and the seal will fail. If you want to prevent the rubber plug from falling off, a sufficiently large interference fit is required, which will make the rubber plug difficult to assemble. Utility Model Content

[0004] To this end, the technical problem to be solved by the utility model is to overcome the problem in the prior art that the air pressure difference will blow out the rubber plug and cause the sealing failure, and then provide a cavity sealing tool, which not only improves the cavity sealing effect, but also avoids workpiece damage and improves assembly efficiency.

[0005] In order to solve the above technical problems, the utility model provides a cavity sealing tool, comprising:

[0006] a rear end stopper, which is provided with a groove and a first through hole, wherein the first through hole is arranged in the groove;

[0007] A mandrel screw, which is provided with a limit pin and a screw head, wherein the mandrel screw is provided with a sealing section between the limit pin and the screw head, the sealing section passes through the first through hole and the limit pin abuts against the groove;

[0008] An expansion piece is sleeved on the sealing section, and when the screw head approaches the rear end stopper, the expansion piece is squeezed by the screw head and then expands.

[0009] In one embodiment of the utility model, it also includes a front end stopper sleeved on the sealing section, the front end stopper is provided with a first accommodating groove and a second through hole, the second through hole is arranged at the bottom of the first accommodating groove, the sealing section passes through the second through hole, and the screw head is located in the first accommodating groove and abuts against the front end stopper.

[0010] In one embodiment of the present invention, the front end stopper and the rear end stopper are both made of rigid non-metallic material.

[0011] In one embodiment of the utility model, the front end stopper is provided with a guiding inclined surface.

[0012] In one embodiment of the present invention, the diameter of the rear end stopper is greater than the diameter of the front end stopper.

[0013] In one embodiment of the utility model, an O-type sealing ring is further included. The O-type sealing ring is sleeved on the annular groove of the sealing section, and the O-type sealing ring is always located between the front end stopper and the sealing section.

[0014] In one embodiment of the utility model, it also includes a handle connected to one end of the spindle screw opposite to the screw head, and the handle is arranged perpendicular to the spindle screw.

[0015] In one embodiment of the present invention, the rear end stopper is provided with a second accommodating groove, and the groove is arranged at the bottom of the second accommodating groove.

[0016] In one embodiment of the present invention, a side wall of the rear end stopper is provided with a mounting hole, and the mounting hole is connected to the second accommodating groove.

[0017] In one embodiment of the present invention, the expansion member is configured as an expansion ball, and the expansion ball is configured to be made of rubber material.

[0018] The above technical solution of the utility model has the following beneficial effects compared with the prior art:

[0019] The cavity sealing tool described in the utility model utilizes a front end block to squeeze the expansion member to cause the expansion member to expand and achieve sealing, which not only increases the friction between the expansion member and the inner wall of the cavity, effectively improving the sealing effect of the cavity, but also avoids damage to the workpiece by the sealing tool, thereby improving assembly efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to make the content of the utility model easier to understand, the utility model is further described in detail according to the specific embodiments of the utility model in combination with the accompanying drawings, wherein

[0021] Figure 1It is a schematic diagram of the structure of the cavity sealing tool in the preferred embodiment of the utility model.

[0022] Figure 2 for Figure 1 A schematic structural diagram of a cross-sectional view of the cavity sealing tool excluding the handle is shown.

[0023] Figure 3 for Figure 1 A schematic structural diagram of a top view of the cavity sealing tool excluding the handle is shown.

[0024] Explanation of the markings in the specification: 1. front end stopper; 11. guide slope; 12. first accommodating groove; 2. expansion piece; 3. rear end stopper; 31. second accommodating groove; 32. groove; 33. step surface; 34. mounting hole; 4. handle; 5. spindle screw; 51. annular groove; 52. sealing section; 6. O-ring; 7. limit pin. DETAILED DESCRIPTION

[0025] The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments so that those skilled in the art can better understand the present invention and implement it, but the embodiments are not intended to limit the present invention.

[0026] Example

[0027] In one embodiment of the present invention, referring to Figure 2 As shown, a cavity sealing tool of the utility model comprises:

[0028] A rear end stopper 3, which is set as a cylindrical structure, and is coaxially provided with a groove 32 and a first through hole, and the first through hole is set in the groove 32;

[0029] The spindle screw 5 is provided with a limit pin 7 and a screw head. A through hole is provided in the radial direction of the spindle screw 5. The limit pin 7 is inserted in the through hole. The spindle screw 5 is provided with a sealing section 52 between the limit pin 7 and the screw head. The sealing section 52 passes through the first through hole and the limit pin 7 abuts against the groove 32. When the limit pin 7 abuts against the groove 32, the spindle screw 5 cannot move to one side of the workpiece. The spindle screw 5 is an M10 stainless steel screw to prevent rust.

[0030] The expansion member 2 is sleeved on the sealing section 52. When the screw head approaches the rear end stopper 3, the expansion member 2 is squeezed by the screw head and then expands and seals. The friction between the expansion ball and the cavity becomes larger, thereby sealing the cavity.

[0031] In one embodiment of the present invention, referring to Figure 1As shown, it also includes a front end block 1 sleeved on the sealing section 52, the front end block 1 is provided with a first accommodating groove 12 and a second through hole, the second through hole is arranged at the bottom of the first accommodating groove 12, the sealing section 52 passes through the second through hole, and the screw head is located in the first accommodating groove 12 and abuts against the front end block 1, the screw head can block the front end block 1, and when the screw head approaches the rear end block 3, the screw head can also push the front end block 1 to squeeze the expansion ball.

[0032] In one embodiment of the present invention, referring to Figure 1 As shown, the front end stopper 1 and the rear end stopper 3 are both made of rigid non-metallic materials, such as polytetrafluoroethylene, etc., which can effectively prevent the inner wall of the cavity and the surface of the workpiece from being scratched while ensuring that the expansion ball is fully squeezed.

[0033] In one embodiment of the present invention, referring to Figure 2 As shown, the front end stopper 1 is provided with a guiding inclined surface 11, which facilitates the front end stopper 1 to be quickly inserted into the cavity.

[0034] In one embodiment of the present invention, referring to Figure 1 As shown, the diameter of the rear end stopper 3 is greater than the diameter of the front end stopper 1, so that the front end stopper 1 can be inserted into the cavity and the rear end stopper 3 can fully rest on the workpiece.

[0035] In one embodiment of the present invention, referring to Figure 2 As shown, it also includes an O-ring 6, which is sleeved on the annular groove 51 of the sealing section 52. The annular groove 51 is located between the sealing section 52 and the front end block 1. The length of the front end block 1 is sufficient, and the O-ring 6 is always located between the front end block 1 and the sealing section 52. The O-ring 6 can prevent the cutting fluid from penetrating into the water cavity of the workpiece along the outer cylindrical surface of the core shaft screw.

[0036] In one embodiment of the present invention, referring to Figure 1 As shown, it also includes a handle 4 connected to the end of the spindle screw 5 opposite to the end where the screw head is provided, and the handle 4 is arranged perpendicular to the spindle screw 5, and the handle 4 is conducive to pulling and turning the spindle screw 5.

[0037] In one embodiment of the present invention, referring to Figure 1As shown, the rear end block 3 is provided with a second accommodating groove 31. Since the limit pin 7 is vertically inserted on the core shaft screw 5, the groove wall of the second accommodating groove 31 can limit the two ends of the limit pin 7. The groove 32 is arranged at the bottom of the second accommodating groove 31. The groove 32 is used to form a step surface 33 with a height difference at the bottom of the second accommodating groove 31. When the limit pin 7 leaves the groove 32 and rotates ninety degrees, it can abut on the step surface 33 to fix the tightness of the expansion ball. The groove 32 of the rear end block 3 can be made into different depths to form step surfaces 33 with different height differences, so as to flexibly adjust the tightness of the expansion ball.

[0038] In one embodiment of the present invention, referring to Figure 1 As shown, a mounting hole 34 is provided on the side wall of the rear end stopper 3 , and the mounting hole 34 is connected to the second receiving groove 31 . The mounting hole 34 is used to insert the limiting pin 7 into the through hole of the spindle screw 5 .

[0039] In one embodiment of the present invention, referring to Figure 1 As shown, the expansion member 2 is configured as an expansion ball, and the expansion ball is configured as a rubber material, and a rubber expansion ball with a diameter of 22 mm is preferably selected. In this embodiment, the diameter of the cavity is 24.6 mm.

[0040] The working principle of the cavity sealing tool of the utility model is:

[0041] When the expansion ball is in a free state, insert the screw head, the front end block 1 and the expansion ball into the cavity, ensure that the rear end block 3 is pressed against the workpiece, hold the rear end block 3 still by hand, grasp the handle 4 and pull the handle 4 to the side away from the workpiece, so that the core shaft screw 5 moves relative to the rear end block 3, and the front end block 1 presses the expansion ball to make the expansion ball expand and block the cavity, then rotate the core shaft screw 5 ninety degrees, so that the limit pin 7 rotates ninety degrees and then presses against the step surface 33 of the groove 32, the core shaft screw 5 is positioned, and the tightness of the expansion ball remains unchanged. When unsealing, hold the rear end block 3 tightly by hand, rotate the core shaft screw 5 ninety degrees, so that the limit pin 7 is aligned with the groove 32, then loosen the core shaft screw 5, so that the expansion ball returns to a free state, and remove the sealing tool.

[0042] Obviously, the above embodiments are merely examples for the purpose of clear explanation and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the invention of the utility model.

Claims

1. A cavity sealing tool, characterized in that: include, a rear end stopper, which is provided with a groove and a first through hole, wherein the first through hole is arranged in the groove; A mandrel screw, which is provided with a limit pin and a screw head, wherein the mandrel screw is provided with a sealing section between the limit pin and the screw head, the sealing section passes through the first through hole and the limit pin abuts against the groove; An expansion piece is sleeved on the sealing section, and when the screw head approaches the rear end stopper, the expansion piece is squeezed by the screw head and then expands.

2. A cavity sealing tool according to claim 1, characterized in that: It also includes a front end stopper sleeved on the sealing section, the front end stopper is provided with a first accommodating groove and a second through hole, the second through hole is arranged at the bottom of the first accommodating groove, the sealing section passes through the second through hole, and the screw head is located in the first accommodating groove and abuts against the front end stopper.

3. A cavity sealing tool according to claim 2, characterized in that: The front end stopper and the rear end stopper are both configured to be rigid non-metallic materials.

4. A cavity sealing tool according to claim 2, characterized in that: The front end stopper is provided with a guiding inclined surface.

5. A cavity sealing tool according to claim 2, characterized in that: The diameter of the rear end stopper is greater than the diameter of the front end stopper.

6. A cavity sealing tool according to claim 2, characterized in that: It also includes an O-type sealing ring, which is sleeved on the annular groove of the sealing section, and the O-type sealing ring is always located between the front end stopper and the sealing section.

7. A cavity sealing tool according to claim 1, characterized in that: It also includes a handle connected to one end of the spindle screw opposite to the screw head, and the handle is arranged vertically to the spindle screw.

8. The cavity sealing tool according to claim 1, characterized in that: The rear end stopper is provided with a second accommodating groove, and the groove is arranged at the bottom of the second accommodating groove.

9. A cavity sealing tool according to claim 8, characterized in that: The side wall of the rear end stopper is provided with a mounting hole, and the mounting hole is connected to the second accommodating groove.

10. The cavity sealing tool according to claim 1, characterized in that: The expansion member is configured as an expansion ball, and the expansion ball is configured as a rubber material.

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