Active compression sealing tool

Abstract

The utility model discloses an active compression sealing tool which is characterized by comprising a pull rod, a protection assembly, an O-shaped sealing ring and an adjusting assembly. The sealing tool is convenient and fast to install and good in sealing effect, excessive extrusion of the O-shaped sealing ring is avoided, the service life of the O-shaped sealing ring is prolonged, and the tool is convenient and fast to assemble.

Description

Technical Field

[0001] The utility model relates to the technical field of parts detection, in particular to an active compression sealing tool. Background Art

[0002] During the processing of parts, many parts need to be connected by welding. This forms welds between the components, and a sealing test is required to detect whether there is leakage at the welds. A Chinese patent (CN217605200U) discloses a sealing fixture for component weld sealing tests. The sealing fixture is easy to install and can effectively prevent the sealing ring from being scratched during installation, thereby affecting the sealing effect, ensuring the accuracy of the test. However, there are still some problems in the actual use of the sealing fixture:

[0003] (1) When the sealing tool is installed, in order to ensure the sealing effect, the protective component is often squeezed too tightly, which causes the ring groove to over-extrude the sealing ring, exceeding the elastic deformation range of the sealing ring, and reducing the service life of the sealing ring;

[0004] (2) The fixing ring is fixed to one end of the core rod, and the interference fit assembly method makes the assembly of the sealing tool itself more troublesome. Utility Model Content

[0005] In view of the above-mentioned defects or deficiencies in the prior art, it is desired to provide an active compression sealing tool that is easy to install, has good sealing effect, avoids excessive extrusion of the O-ring, extends the service life of the O-ring, and the tool itself is easy to assemble.

[0006] The utility model provides an active compression sealing tool, comprising:

[0007] A pull rod, one end of which is provided with a limit member;

[0008] The protective assembly includes an end sleeve, a middle sleeve, and a top sleeve that are sequentially slidably sleeved on the pull rod in a direction away from the limit member; an annular groove is formed on the outer periphery of the pull rod between the end sleeve and the middle sleeve and between the middle sleeve and the top sleeve; a limit ring is provided in the annular groove and is slidably sleeved with the pull rod, and is used to limit the minimum width of the annular groove so that it does not exceed the elastic deformation range of the O-ring;

[0009] An O-shaped sealing ring is sleeved on the outer circumference of the limiting ring in the annular groove. The outer diameter of the O-shaped sealing ring in its natural state is smaller than the outer diameter of the annular groove. The outer diameter of the O-shaped sealing ring after being squeezed by the side wall of the annular groove is larger than the outer diameter of the annular groove. 1 / 2 of the difference between the outer diameters of the annular groove and the limiting ring is larger than the wire diameter of the O-shaped sealing ring;

[0010] An adjusting assembly is fixedly connected to one end of the pull rod away from the limiting member and is used for squeezing the top sleeve to adjust the width of the annular groove.

[0011] Furthermore, the limiting member is a clamping ring, and a circle of clamping grooves is circumferentially formed at one end of the pull rod away from the adjusting assembly, and the clamping ring is sleeved in the clamping groove.

[0012] Furthermore, the limiting ring located between the end sleeve and the middle sleeve is integrally formed with the end sleeve or the middle sleeve, and the limiting ring located between the middle sleeve and the top sleeve is integrally formed with the middle sleeve or the top sleeve.

[0013] Furthermore, the width of the annular groove gradually increases from the groove bottom to the groove opening.

[0014] Furthermore, a positioning ring is fixedly provided on the outer periphery of the top sleeve away from one end of the middle sleeve.

[0015] Furthermore, the adjustment assembly includes a screw rod coaxially fixedly connected to the pull rod, an adjustment nut is threadedly sleeved on the screw rod, the inner diameter of the adjustment nut is larger than the outer diameter of the pull rod, and an end cap is fixedly connected to the end of the screw rod away from the pull rod, and the side wall of the end cap is densely covered with anti-slip grooves.

[0016] Compared with the prior art, the beneficial effects of the present invention are:

[0017] (1) The sealing tool of the present invention sets a limit ring in the ring groove, which limits the minimum width of the ring groove, so that it squeezes the O-ring to achieve the sealing effect without exceeding the elastic deformation range of the O-ring. It is easy to install and has a good sealing effect, avoids excessive extrusion of the O-ring, and extends the service life of the O-ring.

[0018] (2) One end of the protective component is limited by a clamping ring. After the top sleeve, the middle sleeve and the end sleeve are put on the pull rod one by one, the clamping ring is inserted into the slot to complete the assembly of the sealing tooling. The assembly of the tooling itself is very convenient.

[0019] It should be understood that the contents described in the summary of the utility model are not intended to limit the key or important features of the embodiments of the utility model, nor are they intended to limit the scope of the utility model. Other features of the utility model will become easier to understand through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Other features, objects and advantages of the present invention will become more apparent from the detailed description of the non-limiting embodiments made with reference to the following drawings:

[0021] Figure 1 This is a schematic diagram of the structure of the active compression sealing tooling;

[0022] Figure 2 Schematic diagram of the cross-sectional structure of the active compression sealing tooling;

[0023] Figure 3 It is a structural diagram of the O-ring;

[0024] Figure 4 This is a structural diagram of the active compression sealing tooling installed on the part.

[0025] Numbers in the figure: 1, pull rod; 2, protective assembly; 3, O-ring; 4, adjustment assembly;

[0026] 11. Limiting piece; 12. Card slot;

[0027] 21. End sleeve; 22. Middle sleeve; 23. Top sleeve; 24. Ring groove; 25. Limit ring; 26. Positioning ring;

[0028] 41. Screw; 42. Adjusting nut; 43. End cap; 44. Anti-slip pattern. DETAILED DESCRIPTION

[0029] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are intended only to illustrate the relevant utility model and are not intended to limit the scope of the utility model. It should also be noted that, for ease of description, only the portions relevant to the utility model are shown in the accompanying drawings.

[0030] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0031] Please refer to Figures 1 to 4 , an embodiment of the utility model provides an active compression sealing tool, comprising:

[0032] A pull rod 1, one end of which is provided with a limit member 11;

[0033] The protective assembly 2 includes an end sleeve 21, a middle sleeve 22, and a top sleeve 23 that are sequentially slidably mounted on the pull rod 1 in a direction away from the limit member 11; annular grooves 24 are formed on the outer periphery of the pull rod 1 between the end sleeve 21 and the middle sleeve 22, and between the middle sleeve 22 and the top sleeve 23; a limit ring 25 is provided in the annular groove 24 and is slidably mounted on the pull rod 1, and is used to limit the minimum width of the annular groove 24 so that it does not exceed the elastic deformation range of the O-ring 3;

[0034] The O-ring 3 and the outer circumference of the limiting ring 25 in the annular groove 24 are both sleeved with the O-ring 3. The outer diameter R1 of the O-ring 3 in its natural state is smaller than the outer diameter R2 of the annular groove 24. The outer diameter of the O-ring 3 after being squeezed by the side wall of the annular groove 24 is larger than the outer diameter R2 of the annular groove 24. 1 / 2 of the difference between the outer diameters of the annular groove 24 and the limiting ring 25 is larger than the wire diameter R3 of the O-ring 3.

[0035] The adjusting assembly 4 is fixedly connected to one end of the pull rod 1 away from the limiting member 11 and is used for squeezing the top sleeve 23 to adjust the width of the annular groove 24 .

[0036] In this embodiment, if Figure 4 As shown, before the side wall hole of the part is sealed, the O-ring 3 is received in the annular groove 24 formed by the protective component 2 , and the annular groove 24 plays a protective role for the O-ring 3 .

[0037] When sealing the sidewall hole, the sealing tool is inserted into the main channel of the part. When the O-ring 3 passes by the sharp metal edge at the intersection of the main channel and the sidewall hole, the O-ring 3 will not be scratched by the sharp metal edge. After the two sealing rings 3 are distributed on both sides of the sidewall hole, the width of the annular groove 24 is adjusted by adjusting the component 4, squeezing the O-ring 3 in the annular groove 24, increasing the outer diameter of the O-ring 3. When one limiting ring 25 is pressed between the end sleeve 21 and the middle sleeve 22, and the other limiting ring 25 is pressed between the middle sleeve 22 and the top sleeve 23, the annular groove 24 can no longer be reduced. At this time, the O-ring 3 is tightened in the main channel, forming a seal. Then, a high-pressure medium is injected into the component welded to the sidewall hole. After maintaining pressure for a period of time, the weld is checked for leakage to test the quality of the weld.

[0038] The limiting ring 25 limits the minimum width of the ring groove 24, so that it squeezes the O-ring 3 to achieve a sealing effect without exceeding the elastic deformation range of the O-ring 3. It is easy to install and has a good sealing effect, avoids excessive extrusion of the O-ring 3, and extends the service life of the O-ring 3.

[0039] In a preferred embodiment, if Figure 1 and Figure 2 As shown, the limiting member 11 is a clamping ring, and a circle of clamping grooves 12 are circumferentially defined at one end of the pull rod 1 away from the adjusting assembly 4 , and the clamping ring is sleeved in the clamping groove 12 .

[0040] In this embodiment, when assembling the sealing tool itself, the top sleeve 23, the middle sleeve 22 and the end sleeve 21 are put on the pull rod 1 one by one, and then the clamping ring is inserted into the clamping groove 12. At this time, the clamping ring forms a limit for one end of the protective component 2, and the assembly of the sealing tool is completed, and the assembly is convenient.

[0041] In a preferred embodiment, if Figure 2As shown, the limiting ring 25 located between the end sleeve 21 and the middle sleeve 22 is integrally formed with the end sleeve 21 or the middle sleeve 22, and the limiting ring 25 located between the middle sleeve 22 and the top sleeve 23 is integrally formed with the middle sleeve 22 or the top sleeve 23, which reduces the number of components to be assembled in the sealing tooling and further improves its assembly convenience.

[0042] In a preferred embodiment, if Figure 2 As shown, the width of the annular groove 24 gradually increases from the bottom of the groove to the groove mouth, forming an inverted trapezoidal segment surface. After the inner wall of the annular groove 24 squeezes the O-ring 3, a wider sealing surface is formed, which improves the sealing effect.

[0043] In a preferred embodiment, if Figure 1 and Figure 2 As shown, a circle of positioning ring 26 is fixedly provided on one end of the top sleeve 23 away from the middle sleeve 22. When the positioning ring 26 is against the orifice of the main channel of the part, the two O-rings 3 are just distributed on both sides of the side wall hole, which has a good positioning effect and ensures accurate sealing.

[0044] In a preferred embodiment, if Figure 1 and Figure 2 As shown, the adjustment assembly 4 includes a screw 41 coaxially fixedly connected to the pull rod 1, an adjusting nut 42 is threadedly sleeved on the screw 41, the inner diameter of the adjusting nut 42 is larger than the outer diameter of the pull rod 1, and an end cap 43 is fixedly connected to the end of the screw 41 away from the pull rod 1, and the side wall of the end cap 43 is densely covered with anti-slip grooves 44.

[0045] In this embodiment, the sealing tool is inserted into the main channel until the positioning ring 26 rests against the orifice of the main channel. At this time, the O-ring 3 is distributed on both sides of the side wall hole; then the adjusting nut 42 is tightened with a wrench, and the screw 41 is rotated through the end cap 43. With the cooperation of the adjusting nut 42 and the screw 41, the adjusting nut 42 squeezes the top sleeve 23, thereby reducing the width of the annular groove 24, until the limiting ring 25 makes the width of the annular groove 24 unable to continue to decrease, and the O-ring 3 forms an effective seal, with a reasonable structural design and convenient operation.

[0046] In this specification, the terms "connect," "install," and "fix" should be understood broadly. For example, "connect" can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a direct connection or an indirect connection through an intermediary. Those skilled in the art will understand the specific meanings of these terms in this application based on the specific circumstances.

[0047] Throughout this specification, terms such as "one embodiment" or "some embodiments" mean that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present application. In this specification, schematic representations of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0048] The above are merely preferred embodiments of the present application and are not intended to limit the present application. Those skilled in the art will readily appreciate that various modifications and variations are possible. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of the present application shall be included within the scope of protection of the present application.

Claims

1. An active compression sealing tool, characterized in that: include: A pull rod (1), one end of which is provided with a limiting member (11); A protective assembly (2) comprises an end sleeve (21), a middle sleeve (22) and a top sleeve (23) which are sequentially slidably sleeved on the pull rod (1) in a direction away from the limiting member (11); an annular groove (24) is formed on the outer periphery of the pull rod (1) between the end sleeve (21) and the middle sleeve (22) and between the middle sleeve (22) and the top sleeve (23); a limiting ring (25) is provided in the annular groove (24) and is slidably sleeved with the pull rod (1) for limiting the minimum width of the annular groove (24) so ​​that it does not exceed the elastic deformation range of the O-ring (3); An O-type sealing ring (3) is sleeved on the outer periphery of the limiting ring (25) in the annular groove (24), the outer diameter of the O-type sealing ring (3) in a natural state is smaller than the outer diameter of the annular groove (24), the outer diameter of the O-type sealing ring (3) after being squeezed by the side wall of the annular groove (24) is larger than the outer diameter of the annular groove (24), and 1 / 2 of the difference between the outer diameters of the annular groove (24) and the limiting ring (25) is larger than the wire diameter of the O-type sealing ring (3); An adjusting assembly (4) is fixedly connected to an end of the pull rod (1) away from the limiting member (11) and is used for squeezing the top sleeve (23) to adjust the width of the annular groove (24).

2. The active compression sealing tool according to claim 1, characterized in that: The limiting member (11) is a clamping ring, and a circle of clamping grooves (12) are circumferentially formed at one end of the pull rod (1) away from the adjustment assembly (4), and the clamping ring is sleeved in the clamping groove (12).

3. The active compression sealing tool according to claim 1, characterized in that: The limiting ring (25) located between the end sleeve (21) and the middle sleeve (22) is integrally formed with the end sleeve (21) or the middle sleeve (22), and the limiting ring (25) located between the middle sleeve (22) and the top sleeve (23) is integrally formed with the middle sleeve (22) or the top sleeve (23).

4. The active compression sealing tool according to claim 1, characterized in that: The width of the annular groove (24) gradually increases from the groove bottom to the groove opening.

5. The active compression sealing tool according to claim 1, characterized in that: A positioning ring (26) is fixedly provided on the outer periphery of one end of the top sleeve (23) away from the middle sleeve (22).

6. The active compression sealing tool according to claim 1, characterized in that: The adjustment assembly (4) includes a screw (41) coaxially fixedly connected to the pull rod (1), an adjustment nut (42) is threadedly sleeved on the screw (41), the inner diameter of the adjustment nut (42) is larger than the outer diameter of the pull rod (1), and an end cap (43) is fixedly connected to the end of the screw (41) away from the pull rod (1), and the side wall of the end cap (43) is densely covered with anti-slip grooves (44).

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