Device for replacing sliding sealing ring under vacuum and replacement method thereof

Abstract

The invention discloses a device for replacing a sliding sealing ring under vacuum. The device comprises a first vacuum opening, a sealing piston, a sealing ring to be replaced, a vacuum hoop, a vacuum pipe, a replacement sealing ring, a movable sealing ring, a first replacement rod, a second replacement rod, a threaded rod and a second vacuum opening. The sealing piston is sealed with the vacuum pumping opening through a sealing ring (to be replaced); during replacement, the vacuum pipe and the vacuum pumping opening are sealed through the vacuum hoop, gas in the vacuum pipe is exhausted through the second vacuum opening, and the vacuum pipe and the vacuum pumping opening are both in a vacuum state. The sealing piston is pulled out through the threaded rod, then the sealing ring to be replaced is picked out through the first replacement rod, and the replaced sealing ring is pushed into a sealing groove of the sealing piston by pushing the second replacement rod. And the sealing piston is reset by using the threaded rod to achieve the replacement purpose. By pushing and pulling the replacement rod, the sealing ring needing to be replaced can be replaced in a closed container under the condition that the sealing piston is not replaced.

Description

Technical Field

[0001] The invention belongs to the field of vacuum technology, and in particular relates to a device for replacing a sliding sealing ring under vacuum and a replacement method thereof. Background Art

[0002] Vacuum treatment is a common treatment method in modern industry and is widely used in various fields. After the vacuum equipment has finished extracting the vacuum, in order to maintain the vacuum degree of the vacuum chamber, a plug is usually used to seal the vacuum port. There are various forms of plugs, among which the most commonly used is the sealing piston. This kind of plugging method is simple, convenient, and easy to operate. Compared with other plugging methods such as vacuum valves, it has the advantages of small space and high reliability. When encountering a situation where the sealing piston needs to be replaced, the previous method is often to use a device to replace the entire plug. This replacement method has the following disadvantages: First, the replacement device is large, and in order to ensure smooth replacement, it is often necessary to reserve a large enough space; second, it is necessary to prepare a replacement piston in advance, and it is impossible to handle temporary emergencies; third, because a sufficient number of replacement pistons need to be prepared, the cost is high. Therefore, it is necessary to invent a device that can replace the sealing ring of the vacuum piston without replacing the piston and destroying the vacuum, so as to deal with emergencies and reduce costs.

[0003] Prior art document 1 (CN116833722A) discloses a method for replacing a vacuum plug, but the disadvantage of the prior art is that it is still essentially to replace the entire plug. In the face of an emergency or when there is no plug in reserve, it is still impossible to replace only the sealing ring on the plug. How to replace the sealing ring on the plug without replacing the plug and destroying the vacuum is a problem that must be solved.

[0004] Therefore, there is an urgent need for a device that can replace the sealing ring on the plug without replacing the plug and without destroying the vacuum. Summary of the invention

[0005] In order to solve the deficiencies in the prior art, the present invention provides a device for replacing a sliding sealing ring under vacuum and a replacement method thereof.

[0006] The present invention adopts the following technical solution.

[0007] The first aspect of the present invention discloses a device for replacing a sliding sealing ring under vacuum, comprising: a first vacuum port, a sealing piston, a sealing ring to be replaced, a vacuum clamp, a vacuum tube, a replacement sealing ring, a movable sealing ring, a first replacement rod, a second replacement rod, a threaded rod, and a second vacuum port, characterized in that:

[0008] The sealing piston forms a vacuum sealing structure with the inner wall of the first vacuum port through the sealing ring to be replaced;

[0009] The vacuum tube forms a vacuum sealing structure with the first vacuum port through a vacuum clamp; the vacuum tube forms a vacuum sealing structure with the first replacement rod, the second replacement rod, and the threaded rod through a plurality of movable sealing rings; the vacuum tube and the second vacuum port form a vacuum sealing structure through a vacuum clamp;

[0010] The first replacement rod, the second replacement rod and the threaded rod can all slide freely in the length direction, and due to the performance of the movable sealing ring, their sliding will not affect the vacuum sealing performance of the vacuum tube;

[0011] The threaded rod can move along the length direction and connect with the threaded port of the sealing piston to separate the sealing piston from the first vacuum port;

[0012] The second vacuum port is connected to an external vacuum pump and is used to draw a vacuum from the vacuum tube.

[0013] Preferably, a barb is provided at the end of the inner surface of the first replacement rod, which can hook a sealing ring of any non-metallic material; the outer surface of the first replacement rod is smooth, and the replacement sealing ring can slide on the outer surface of the first replacement rod.

[0014] Preferably, the end of the first replacement rod, ie, the section with the barb, has a smooth and curved tip.

[0015] Preferably, the second replacement rod can slide freely on the outer surface of the first replacement rod; the second replacement rod can smoothly push the replacement sealing ring.

[0016] Preferably, the end of the threaded rod has a thread of a certain length, and the length matches the threaded hole of the sealing piston; the length of the threaded rod is longer than the vacuum tube.

[0017] Preferably, the surface of the vacuum tube has second vacuum ports, and the number of the second vacuum ports is not limited.

[0018] A second aspect of the present invention discloses a method for replacing a sliding sealing ring on a sealing piston under a vacuum state, based on the device for replacing a sliding sealing ring under a vacuum, comprising the following steps:

[0019] Step 1, check the integrity of the equipment and prepare replacement materials, connect the vacuum tube to the first vacuum port, and ensure that the vacuum tube is in a vacuum state;

[0020] Step 2, replace the sealing ring;

[0021] Step 3, reset the device and remove the device.

[0022] Preferably, step 1 specifically includes:

[0023] Step 1.1, determine the seal ring that needs to be replaced, and insert a replacement seal ring of the same model into the first replacement rod;

[0024] Step 1.2, connect the vacuum tube to the vacuum port and seal it with a vacuum clamp;

[0025] Step 1.3, connect the second vacuum port to the vacuum pump to draw vacuum in the vacuum tube.

[0026] Preferably, step 2 specifically includes:

[0027] Step 2.1, after the vacuum in the vacuum tube is no higher than the vacuum inside the sealing piston, push the threaded rod to connect the threaded rod with the sealing piston and pull out the sealing piston;

[0028] Step 2.2, push the first replacement rod to the sealing ring to be replaced, and use the barb of the first replacement rod to hook the sealing ring to be replaced;

[0029] Step 2.3, pull the first replacement rod outward to the rear of the sealing piston, so that the sealing ring to be replaced is separated from the sealing groove of the sealing piston;

[0030] Step 2.4, push the first replacement rod inward again so that the first replacement rod is located in the sealing groove of the sealing piston;

[0031] Step 2.5, push the second replacement rod, and use the second replacement rod to push the replacement sealing ring into the sealing groove.

[0032] Preferably, step 3 specifically includes:

[0033] Step 3.1: After the sealing ring is replaced, push the threaded rod inward to reset the sealing piston;

[0034] Step 3.2: After confirming that the sealing piston is fully pushed in, rotate the threaded rod to separate the threaded rod from the sealing piston;

[0035] Step 3.3, open the second vacuum port to restore the vacuum tube to normal pressure, dismantle the device and recycle the waste sealing ring.

[0036] The beneficial effect of the present invention is that, compared with the prior art,

[0037] In the prior art, when replacing the plug, the entire plug is often replaced using a device. This replacement method has the following disadvantages: 1. The replacement device is relatively large, and in order to ensure smooth replacement, a sufficiently large space is often required; 2. The replacement piston needs to be prepared in advance, and temporary emergency situations cannot be handled; 3. Since a sufficient number of replacement pistons need to be prepared, the cost is relatively high.

[0038] The present invention realizes the replacement of the sealing ring by providing a matching vacuum tube and a replacement rod, and by combining the actions of the replacement rods, without replacing the sealing piston and without destroying the vacuum. This replacement device and method can not only save the production cost of the sealing piston, but also, in the face of an emergency such as vacuum destruction, there is no need to wait for the new sealing piston to be manufactured, and only a new sealing ring can be used to complete the replacement.

[0039] In summary, the device can effectively reduce the cost of vacuum chamber maintenance, reduce the risk of vacuum chamber damage, and can still replace the sealing ring when using the device in a narrow operating space. When responding to an emergency, the device can also complete the emergency response without replacing the piston. BRIEF DESCRIPTION OF THE DRAWINGS

[0040] Figure 1 It is a schematic diagram of the structure of a device for replacing a sliding sealing ring under vacuum in the present invention;

[0041] In the figure: 1. First vacuum port; 2. Sealing piston; 3. Sealing ring to be replaced; 4. Vacuum clamp; 5. Vacuum tube; 6. Replacement sealing ring; 7. Movable sealing ring; 8. First replacement rod; 9. Second replacement rod; 10. Threaded rod; 11. Second vacuum port;

[0042] Figure 2 It is a schematic diagram of the structural relationship between the first replacement rod, the second replacement rod, the vacuum tube, and the replacement sealing ring;

[0043] Figure 3 It is a step of replacing the sealing ring during the implementation of the present invention;

[0044] Figure 4 This is the step of replacing the sealing ring during the implementation of the present invention. DETAILED DESCRIPTION

[0045] In order to better understand the technical solution of the present invention, the following is a detailed description through specific embodiments:

[0046] See also Figure 1 , Embodiment 1 of the present invention discloses a device for replacing a sliding sealing ring under vacuum, the device comprising a first vacuum port 1, a sealing piston 2, and a vacuum tube 5;

[0047] The first vacuum port 1 is a vacuum port of the vacuum chamber, the sealing piston 2 is placed in the first vacuum port 1, and the sealing ring 3 is used to seal the two.

[0048] The sealing ring 3 is a sealing ring to be replaced, and the number is not limited. The sealing ring is made of non-metal, and the common materials are fluororubber and nitrile rubber;

[0049] The material of the sealing piston 2 is not limited, and common materials are stainless steel, copper, aluminum alloy, etc.

[0050] The vacuum tube 5 forms a vacuum sealing structure with the first replacement rod 8, the second replacement rod 9 and the threaded rod 10 through a plurality of movable sealing rings 7; the vacuum tube 5 and the second vacuum port 11 form a vacuum sealing structure through a vacuum clamp;

[0051] There is no limit to the number of the movable sealing rings 7, and the material thereof is non-metal, and common materials are fluororubber and nitrile rubber; during the pushing process of the first replacement rod 8, the second replacement rod 9, and the threaded rod 10, the movable sealing ring 7 is always in a working state;

[0052] The inner end of the first replacement rod 8 has a barb, which can hook any non-metallic sealing ring; the outer surface of the first replacement rod 8 is smooth, and the replacement sealing ring 6 can slide on the outer surface of the first replacement rod 8; the end of the first replacement rod 8, that is, the section with the barb, has a smooth and curved tip;

[0053] The second replacement rod 9 can slide freely on the outer surface of the first replacement rod 8; the second replacement rod 9 can smoothly push the replacement sealing ring 6;

[0054] The end of the threaded rod 10 has a thread of a certain length, and the length matches the threaded hole of the sealing piston 2; the length of the threaded rod 10 is longer than the vacuum tube 5;

[0055] In a preferred but non-limiting embodiment of the present invention, the vacuum tube 5 is made of common materials for vacuum containers such as stainless steel, and can also be made of transparent non-metallic materials such as acrylic;

[0056] In a preferred but non-limiting embodiment of the present invention, the first replacement rod 8, the second replacement rod 9, and the threaded rod 10 are made of copper, aluminum, or other common materials with good mechanical properties; the sealing ring 3 to be replaced, the replacement sealing ring 6, and the movable sealing ring 7 are made of fluororubber, nitrile rubber, or other common materials that can be used to make sealing components with good sealing properties;

[0057] In a preferred but non-limiting embodiment of the present invention, the current lead conductive rod 1 is arranged on the left side of the electric device 4 .

[0058] In a preferred but non-limiting embodiment of the present invention, the outer surface of the first changing rod 8 is smooth; the lengths of the first changing rod 8, the second changing rod 9, and the threaded rod 10 are greater than the length of the vacuum tube;

[0059] Further preferably, the first changing rod 8, the second changing rod 9 and the threaded rod 10 all have operating handles, and the operating handles have no limit structure relative to each other.

[0060] In a preferred but non-limiting embodiment of the present invention, the replacement seal ring 6 needs to be placed outside the first replacement rod 8, such as Figure 2 As shown. The second replacement rod 9 does not contact the replacement sealing ring 6, and during the movement of the first replacement rod 8, the second replacement rod 9 does not contact the replacement sealing ring 6 at all times;

[0061] In a preferred but non-limiting embodiment of the present invention, when the first replacement rod 8 is used to take out the sealing ring 3 to be replaced, the sealing ring 3 to be replaced is hooked with a barb and dragged backward to be separated from the sealing groove. Figure 3 and Figure 4 As shown; during the dragging process, the replacement sealing ring 3 may be damaged, but since the replacement sealing ring 3 is usually not reusable, the damage does not affect the use of the device.

[0062] In a preferred but non-limiting embodiment of the present invention, the shape of the contact surface between the second replacement rod 9 and the replacement seal ring 6 is not limited;

[0063] Embodiment 2 of the present invention provides a method for slipping a sliding sealing ring on a sealing piston under a vacuum state, comprising the following steps:

[0064] Step 1, check the integrity of the equipment and prepare replacement materials, connect the vacuum tube to the first vacuum port, and ensure that the vacuum tube is in a vacuum state;

[0065] Step 1 specifically includes:

[0066] Step 1.1, determine the seal ring that needs to be replaced, and insert the replacement seal ring of the same model into the first replacement rod; if the seal ring fails, the failed seal ring should be determined first, and a vacuum test is usually performed using a helium leak test method.

[0067] Step 1.2, connect the vacuum tube to the vacuum port and seal it with a vacuum clamp;

[0068] Step 1.3, connect the second vacuum port to the vacuum pump to draw vacuum in the vacuum tube.

[0069] Step 2, replace the sealing ring;

[0070] Step 2 specifically includes:

[0071] Step 2.1, after the vacuum in the vacuum tube is no higher than the vacuum inside the sealing piston, push the threaded rod to connect the threaded rod with the sealing piston and pull out the sealing piston;

[0072] Step 2.2, push the first replacement rod to the sealing ring to be replaced, and use the barb of the first replacement rod to hook the sealing ring to be replaced;

[0073] Step 2.3, pull the first replacement rod outward to the rear of the sealing piston, so that the sealing ring to be replaced is separated from the sealing groove of the sealing piston;

[0074] Step 2.4, push the first replacement rod inward again so that the first replacement rod is located in the sealing groove of the sealing piston;

[0075] Step 2.5, push the second replacement rod, and use the second replacement rod to push the replacement sealing ring into the sealing groove.

[0076] Step 3, reset the device and remove the device.

[0077] Step 3 specifically includes:

[0078] Step 3.1: After the sealing ring is replaced, push the threaded rod inward to reset the sealing piston;

[0079] Step 3.2: After confirming that the sealing piston is fully pushed in, rotate the threaded rod to separate the threaded rod from the sealing piston;

[0080] Step 3.3, open the second vacuum port to restore the vacuum tube to normal pressure, dismantle the device and recycle the waste sealing ring.

[0081] The beneficial effect of the present invention is that, compared with the prior art,

[0082] In the prior art, when replacing the plug, the entire plug is often replaced using a device. This replacement method has the following disadvantages: 1. The replacement device is relatively large, and in order to ensure smooth replacement, a sufficiently large space is often required; 2. The replacement piston needs to be prepared in advance, and temporary emergency situations cannot be handled; 3. Since a sufficient number of replacement pistons need to be prepared, the cost is relatively high.

[0083] The present invention realizes the replacement of the sealing ring by providing a matching vacuum tube and a replacement rod, and by combining the actions of the replacement rods, without replacing the sealing piston and without destroying the vacuum. This replacement device and method can not only save the production cost of the sealing piston, but also, in the face of an emergency such as vacuum destruction, there is no need to wait for the new sealing piston to be manufactured, and only a new sealing ring can be used to complete the replacement.

[0084] In summary, the device can effectively reduce the cost of vacuum chamber maintenance, reduce the risk of vacuum chamber damage, and can still replace the sealing ring when using the device in a narrow operating space. When responding to an emergency, the device can also complete the emergency response without replacing the piston.

[0085] Those skilled in the art should recognize that the above embodiments are only used to illustrate the present invention, and are not intended to limit the present invention. As long as they are within the spirit of the present invention, any changes or modifications to the above embodiments will fall within the scope of the claims of the present invention.

Claims

1. A device for replacing a sliding sealing ring under vacuum, comprising: A first vacuum port (1), a sealing piston (2), a sealing ring to be replaced (3), a vacuum clamp (4), a vacuum tube (5), a replacement sealing ring (6), a movable sealing ring (7), a first replacement rod (8), a second replacement rod (9), a threaded rod (10), and a second vacuum port (11), characterized in that: The sealing piston (2) forms a vacuum sealing structure with the inner wall of the first vacuum port (1) through the sealing ring (3) to be replaced; the vacuum tube (5) forms a vacuum sealing structure with the first vacuum port (1) through the vacuum clamp (4); The vacuum tube (5) forms a vacuum sealing structure with a first replacement rod (8), a second replacement rod (9) and a threaded rod (10) through a plurality of movable sealing rings (7); the vacuum tube (5) and a second vacuum port (11) form a vacuum sealing structure through a vacuum clamp; the first replacement rod (8), the second replacement rod (9) and the threaded rod (10) can all slide freely in the length direction and are sealed by the movable sealing ring (7) during the sliding process, and their sliding will not affect the vacuum sealing performance of the vacuum tube (5); the threaded rod (10) can move in the length direction and is connected to the threaded port of the sealing piston (2) to separate the sealing piston (2) from the first vacuum port (1); The second vacuum port (11) is connected to an external vacuum pump and is used to draw a vacuum from the vacuum tube (5).

2. The device for replacing a sliding sealing ring under vacuum according to claim 1, characterized in that: The end of the inner surface of the first replacement rod (8) has a barb that can hook onto a sealing ring of any non-metallic material; the outer surface of the first replacement rod (8) is smooth, and the replacement sealing ring (6) can slide on the outer surface of the first replacement rod (8).

3. The device for replacing a sliding sealing ring under vacuum according to claim 2, characterized in that: The end of the first replacement rod (8), that is, the section with the barb, has a smooth and curved tip.

4. The device for replacing a sliding sealing ring under vacuum according to claim 1, characterized in that: The second replacement rod (9) can slide freely on the outer surface of the first replacement rod (8); the second replacement rod (9) can smoothly push the replacement sealing ring (6).

5. The device for replacing a sliding sealing ring under vacuum according to claim 1, characterized in that: The end of the threaded rod (10) has a thread of a certain length, the length of which matches the threaded hole of the sealing piston (2); the length of the threaded rod (10) is longer than the vacuum tube (5).

6. The device for replacing a sliding sealing ring under vacuum according to claim 1, characterized in that: The surface of the vacuum tube (5) has second vacuum ports (11), and the number of the second vacuum ports (11) is not limited.

7. A method for replacing a sliding sealing ring on a sealing piston under vacuum, based on a device for replacing a sliding sealing ring under vacuum as claimed in any one of claims 1 to 6, characterized in that: The following steps are involved: Step 1, check the integrity of the equipment and prepare replacement materials, connect the vacuum tube to the first vacuum port, and ensure that the vacuum tube is in a vacuum state; Step 2, replace the sealing ring; Step 3, reset the device and remove the device.

8. The method for slipping a sliding seal ring on a sealing piston under vacuum conditions according to claim 7, characterized in that: Step 1 specifically includes: Step 1.1, determine the seal ring that needs to be replaced, and insert a replacement seal ring of the same model into the first replacement rod; Step 1.2, connect the vacuum tube to the vacuum port and seal it with a vacuum clamp; Step 1.3, connect the second vacuum port to the vacuum pump to draw vacuum in the vacuum tube.

9. The method for slipping a sliding seal ring on a sealing piston under vacuum state according to claim 7, characterized in that: Step 2 specifically includes: Step 2.1, after the vacuum in the vacuum tube is no higher than the vacuum inside the sealing piston, push the threaded rod to connect the threaded rod with the sealing piston and pull out the sealing piston; Step 2.2, push the first replacement rod to the sealing ring to be replaced, and use the barb of the first replacement rod to hook the sealing ring to be replaced; Step 2.3, pull the first replacement rod outward to the rear of the sealing piston, so that the sealing ring to be replaced is separated from the sealing groove of the sealing piston; Step 2.4, push the first replacement rod inward again so that the first replacement rod is located in the sealing groove of the sealing piston; Step 2.5, push the second replacement rod, and use the second replacement rod to push the replacement sealing ring into the sealing groove.

10. The method for slipping a sliding seal ring on a sealing piston under vacuum state according to claim 7, characterized in that: Step 3 specifically includes: Step 3.1: After the sealing ring is replaced, push the threaded rod inward to reset the sealing piston; Step 3.2: After confirming that the sealing piston is fully pushed in, rotate the threaded rod to separate the threaded rod from the sealing piston; Step 3.3, open the second vacuum port to restore the vacuum tube to normal pressure, dismantle the device and recycle the waste sealing ring.

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