One-way valve reverse airtight-vacuum extraction tool

Abstract

The present invention relates to the technical field of airtight detection structure, and specifically to a one-way valve reverse airtight vacuum extraction tool, comprising a joint body, a conversion head, a rod body and a head, the outer side wall of the joint body is provided with a coaxial first external thread section and an O-ring, the joint body is provided with a central through hole, the conversion head is fixed to one end of the joint body, the conversion head is a cylindrical structure, the inner cavity of the conversion head is coaxial with and connected to the central through hole, and the inner diameter of the conversion head is larger than the aperture of the central through hole; the head is fixed to the first end of the rod body and placed in the inner cavity of the conversion head, the rod body gap passes through the central through hole and the second end extends out of the central through hole, the second end of the rod body is provided with a second external thread section, and the head is provided with a connecting portion suitable for connecting the central through hole and the inner cavity. The tool can open the one-way valve from the reverse direction, and can also ensure reliable connection and sealing with the one-way valve, and will not cause unnecessary damage to the product during the airtight and vacuum extraction process.

Description

Technical Field

[0001] The invention relates to the technical field of airtight detection structures, and in particular to a one-way valve reverse airtight-vacuum extraction tool. Background Art

[0002] There is a one-way valve on the market with a structure like Figure 1 As shown, it includes a valve installation cylinder 100, a valve body 200 and a valve stem 300. The valve installation cylinder 100 is fixed on the side wall 400 of the product. The outer end of the valve installation cylinder 100 is provided with a first internal thread section. The valve body 200 is sealed and fixed to the inner end of the valve installation cylinder 100. The valve stem 300 is installed in the valve body 200. The outer end of the valve stem 300 extends out of the valve body 200 and is provided with a second internal thread section. The first internal thread section is mainly used to connect with external equipment that requires gas and liquid, such as connecting the return line of cooling water when the engine is running-in; the second internal thread section is mainly used to thread the handle so that the one-way valve can be opened in the reverse direction through the handle to clean the inside of the valve. The main function of this one-way valve is: when the product is not working, it blocks the gas and liquid in the external environment from entering the cavity; during the operation of the product, it allows the gas and water in the cavity to be smoothly discharged to the external environment through the one-way valve.

[0003] In some cases, after the one-way valve is assembled, it is necessary to open the one-way valve from the outside to perform vacuum and airtightness inspection on the sealing condition inside the pipeline. However, due to the lack of special tools, vacuum and airtightness inspection are difficult to perform. Summary of the invention

[0004] In order to overcome the technical defect in the prior art that it is difficult to evacuate and test the air tightness of the inner pipeline of the one-way valve after assembly due to the lack of special tools, the present invention provides a one-way valve reverse airtightness-vacuuming tool.

[0005] The present invention provides a one-way valve reverse airtight-vacuum extraction tool, comprising:

[0006] A conversion joint, comprising a joint body and a conversion head, the outer side wall of the joint body is provided with a coaxial first external thread section and an O-ring, the first external thread section is suitable for threading a first internal thread section of a one-way valve, the joint body is provided with a central through hole coaxial with the O-ring, the conversion head is fixed to one end of the joint body and is suitable for connecting an airtight-vacuum device, the conversion head is a cylindrical structure, the inner cavity of the conversion head is coaxial with and communicated with the central through hole, and the diameter of the inner cavity is larger than the aperture of the central through hole;

[0007] The pull rod includes a head and a rod body, wherein the head is fixed to the first end of the rod body and is placed in the inner cavity of the conversion head, the rod body gap passes through the central through hole and the second end extends out of the central through hole, the second end of the rod body is provided with a second external thread section, the second external thread section is suitable for screwing the second internal thread section of the one-way valve, and the head is provided with a connecting portion suitable for connecting the central through hole and the inner cavity.

[0008] Optional, one-way valve reverse airtight-vacuum extraction tool also includes:

[0009] The washer is pressed on the bottom of the inner cavity through the head, the inner diameter of the washer is larger than the diameter of the rod body, and the connecting part is connected with the central through hole through the inner hole of the washer.

[0010] Optionally, the gasket is gap-matched with the inner cavity.

[0011] Optionally, the gasket is provided with a notch connecting its inner circle and outer circle.

[0012] Optionally, the connecting portion is a plurality of notches evenly distributed along the circumference of the head, the notches are arranged along the radial direction of the head, and the minimum diameter corresponding to the notches is equal to the diameter of the rod body.

[0013] Optionally, a cross groove is provided on the end surface of the head away from the rod body, and four notches are provided corresponding to the cross groove.

[0014] Optionally, the outer side surface of the conversion head is provided with a third external thread section suitable for threading the airtight-vacuum extraction device.

[0015] Optionally, the outer side wall of the connector body is further provided with a polygonal screwing portion, and the screwing portion is located on a side of the first external thread section close to the conversion head.

[0016] The technical solution provided by the present invention has the following advantages compared with the prior art:

[0017] The one-way valve reverse airtight-vacuum extraction tool of the present invention comprises a conversion joint and a pull rod, the conversion joint comprises a joint body and a conversion head, and the pull rod comprises a head and a rod body; the joint body is fixed to the first internal thread section of the one-way valve through a first external thread section, and a sealing connection between the joint body and the valve mounting cylinder is achieved through an O-ring, so that the one-way valve has only one passage leading to the outside world, namely, the central through hole and the inner cavity; the head is placed in the inner cavity of the conversion head, and the head ensures the communication between the central through hole and the inner cavity of the conversion head through a notch, so as to ensure the smooth passage of the one-way valve to the outside world; the conversion head The head is connected to the airtight-vacuuming device, so that the airtight-vacuuming device can be connected to the aforementioned channel, and be ready for vacuuming or airtightness inspection; the rod body passes through the joint body and is connected to the second internal thread section of the one-way valve, and the bottom of the inner cavity blocks the head, converting the rotational motion of the pull rod into the linear motion of the valve stem of the one-way valve. The valve stem can be moved outward by rotating the pull rod, so that the one-way valve can be opened in the opposite direction from the outside, and the airtight-vacuuming device can be connected to the inside of the one-way valve through the inner cavity, the notch, and the center through hole in turn, completing the vacuuming and airtightness inspection. This tool can open the one-way valve from the reverse direction, and can also ensure reliable connection and sealing with the one-way valve, and will not cause unnecessary damage to the product during the airtight and vacuuming process. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the invention and, together with the description, serve to explain the principles of the invention.

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative labor.

[0020] Figure 1 It is a structural schematic diagram of a one-way valve in the prior art;

[0021] Figure 2 A cross-sectional view of a one-way valve reverse airtight-vacuum extraction tool according to an embodiment of the present invention;

[0022] Figure 3 It is an assembly cross-sectional view of the one-way valve reverse airtight-vacuum extraction tool and the one-way valve according to an embodiment of the present invention;

[0023] Figure 4 is a cross-sectional view of the conversion joint according to an embodiment of the present invention;

[0024] Figure 5 for Figure 4 End view at A in the middle;

[0025] Figure 6 A front view of the pull rod according to an embodiment of the present invention;

[0026] Figure 7 for Figure 6 Right side view of the structure shown in;

[0027] Figure 8 It is a schematic diagram of the structure of the gasket described in an embodiment of the present invention.

[0028] in:

[0029] 1. Conversion joint; 11. Joint body; 111. First external threaded section; 112. Center through hole; 113. Screw-on portion; 12. Conversion head; 121. Inner cavity; 122. Third external threaded section; 13. O-ring; 2. Pull rod; 21. Head; 211. Notch; 212. Cross groove; 22. Rod body; 221. Second external threaded section; 3. Washer; 31. Notch; 100. Mounting tube; 200. Valve body; 300. Valve stem; 400. Product side wall. DETAILED DESCRIPTION

[0030] In order to more clearly understand the above-mentioned objectives, features and advantages of the present invention, the scheme of the present invention will be further described below. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0031] In the following description, many specific details are set forth to facilitate a full understanding of the present invention, but the present invention may also be implemented in other ways different from those described herein; it is obvious that the embodiments in the specification are only part of the embodiments of the present invention, rather than all of the embodiments.

[0032] In one embodiment, Figures 2 to 7As shown, a one-way valve reverse airtight-vacuuming tool is provided, comprising: a conversion joint 1, which comprises a joint body 11 and a conversion head 12, the outer side wall of the joint body 11 is provided with a coaxial first external thread section 111 and an O-ring 13, the first external thread section 111 is suitable for threading the first internal thread section of the one-way valve, the joint body 11 is provided with a central through hole 112 coaxial with the O-ring 13, the conversion head 12 is fixed to one end of the joint body 11 and is suitable for connecting the airtight-vacuuming device, the conversion head 12 is a cylindrical structure, and the inner cavity 121 of the conversion head 12 Coaxial and connected with the central through hole 112, the diameter of the inner cavity 121 is larger than the aperture of the central through hole 112; the pull rod 2 includes a head 21 and a rod body 22, the head 21 is fixed to the first end of the rod body 22 and is placed in the inner cavity 121 of the conversion head 12, the rod body 22 has a gap passing through the central through hole 112 and the second end extends out of the central through hole 112, the second end of the rod body 22 is provided with a second external thread section 221, the second external thread section 221 is suitable for threading the second internal thread section of the one-way valve, and the head 21 is provided with a connecting portion suitable for connecting the central through hole 112 and the inner cavity 121.

[0033] Specifically, to facilitate the installation of the O-ring 13, an annular groove may be provided on the outer wall of the joint body 11, and the O-ring 13 may be embedded in the annular groove by utilizing its elasticity and partially protrude from the annular groove so as to achieve a sealing effect through elastic extrusion.

[0034] Specifically, the relative positions of the first external thread section 111 and the O-ring 13 are not limited. If the side of the conversion head 12 is defined as the outer side, the first external thread section 111 can be located on the outer side of the O-ring 13 or on the inner side of the O-ring 13. The former is preferably adopted. Figure 2 As shown, the first external thread section 111 is located outside the O-ring 13, which can prevent the liquid inside the one-way valve from entering the first external thread section 111, thereby avoiding damage to the structure of the first external thread section 111 caused by long-term retention of liquid.

[0035] Specifically, the structure of the conversion head 12 connected to the airtight vacuum device depends on the interface of the airtight vacuum device, for example Figure 2 and Figure 4 As shown, the outer side surface of the conversion head 12 is provided with a third external thread section 122 suitable for threading with an airtight vacuum device.

[0036] It is easy to understand that the cylindrical structure is a tubular structure with a hollow interior and open ends.

[0037] Specifically, the conversion head 12 and the connector body 11 may be integrally formed, or may be fixedly connected by welding or other methods.

[0038] Specifically, the head 21 and the rod body 22 can be integrally formed, or fixedly connected by welding or other methods.

[0039] Specifically, the connecting portion may be a through hole that passes through the head 21, or may be a through hole that passes through the head 21. Figure 7 The gap 211 described in.

[0040] In specific implementation, the connector body 11 is fixed to the first internal thread section of the one-way valve through the first external thread section 111, and the sealing connection between the connector body 11 and the valve mounting cylinder is realized through the O-ring 13, so that the one-way valve has only one passage to the outside, namely, the central through hole 112 and the inner cavity 121; the head 21 is placed in the inner cavity 121 of the conversion head 12, and the head 21 ensures the communication between the central through hole 112 and the inner cavity 121 of the conversion head 12 through the notch 211, so as to ensure the smooth passage of the one-way valve to the outside; the conversion head 12 is connected to the airtight-vacuum device, so The airtight vacuum device can be connected to the aforementioned channel to prepare for vacuuming or airtightness inspection; the rod body 22 penetrates the joint body 11 and is connected to the second internal thread section of the one-way valve. The bottom of the inner cavity 121 blocks the head 21, and the rotational movement of the pull rod 2 is converted into the linear movement of the valve stem of the one-way valve. The valve stem can be moved outward by rotating the pull rod 2, thereby opening the one-way valve in the opposite direction from the outside, and then the airtight vacuum device can be connected to the inside of the one-way valve through the inner cavity 121, the notch 211, and the center through hole 112 in turn, completing the vacuuming and airtightness inspection. This tool can open the one-way valve from the reverse direction, and can also ensure reliable connection and sealing with the one-way valve, and will not cause unnecessary damage to the product during the airtight and vacuuming process.

[0041] In some embodiments, reference Figure 2 and Figure 3 The one-way valve reverse airtight-vacuum extraction tool also includes: a gasket 3, which is pressed on the bottom of the inner cavity 121 through the head 21, the inner diameter of the gasket 3 is larger than the diameter of the rod body 22, and the connecting part is connected with the central through hole 112 through the inner hole of the gasket 3.

[0042] It is easy to understand that, since the inner diameter of the gasket 3 is larger than the diameter of the rod body 22 , a gap is left between the gasket 3 and the rod body 22 , and the gap is used for the circulation of gas and liquid.

[0043] In specific implementation, the opening of the check valve by the pull rod 2 can be adjusted by the gasket 3. Because the second internal thread section of the check valve has a certain depth, the initial threaded length of the second external thread section 221 and the second internal thread section can be reduced by the gasket 3, thereby increasing the length of the second internal thread section that is not threaded, and then when the pull rod 2 is rotated to the limit, the upper limit of the opening of the check valve can be increased. If the opening of the check valve needs to be increased, the thickness of the gasket 3 can be increased; if the opening of the check valve needs to be reduced, the thickness of the gasket 3 can be reduced or the gasket 3 can be eliminated.

[0044] Furthermore, the gasket 3 is clearance-matched with the inner cavity 121. The inner cavity 121 limits the position of the gasket 3 to ensure the assembly position of the gasket 3, thereby ensuring the coaxiality of the inner hole of the gasket 3 and the pull rod 2, and further ensuring that the connecting part can be connected with the central through hole 112 through the inner hole.

[0045] Further, refer to Figure 8 The gasket 3 is provided with a notch 31 connecting its inner circle and outer circle. The gas and liquid can not only realize the communication between the central through hole 112 and the inner cavity 121 through the connecting part, but also realize the communication between the central through hole 112 and the inner cavity 121 through the gap formed by the gap fit between the notch 31 and the inner cavity 121 of the gasket 3, so that the flow of gas and liquid is smoother.

[0046] Furthermore, the connecting portion is a plurality of notches 211 uniformly distributed along the circumference of the head 21, the notches 211 are arranged along the radial direction of the head 21, and the minimum diameter corresponding to the notches 211 is equal to the diameter of the rod body 22. Because the inner diameter of the washer 3 is larger than the diameter of the rod body 22, and the minimum diameter corresponding to the notches 211 is equal to the diameter of the rod body 22, the notches 211 and the inner hole of the washer 3 have a common area, and the inner cavity 121 is connected to the central through hole 112 through this part of the common area. In addition, setting the connecting portion in the shape of the notch 211 is also conducive to ensuring the structural strength of the pull rod 2.

[0047] Further, refer to Figure 7 The end surface of the head 21 away from the rod body 22 is provided with a cross groove 212, and four notches 211 are provided corresponding to the cross grooves 212. On the one hand, the pull rod 2 can be rotated through the cross grooves 212 using a slotted or cross screwdriver, which is more convenient; on the other hand, the notches 211 are provided corresponding to the cross grooves 212, so that the pull rod 2 is subjected to uniform force when rotating, which is more conducive to ensuring the structural strength of the pull rod 2.

[0048] In some embodiments, reference Figure 5 The outer wall of the connector body 11 is also provided with a polygonal screwing portion 113, which is located on the side of the first external thread section 111 close to the conversion head 12. The conversion connector 1 can be rotated by a wrench through the screwing portion 113, which is more convenient.

[0049] Based on the above specific implementation methods, the method of using this tool is as follows:

[0050] S1. Apply grease to the O-ring 13 and install it into the annular groove of the conversion joint 1;

[0051] S2. Use a wrench to screw the adapter 1 into the first internal thread section of the one-way valve through the screwing portion 113;

[0052] S3. Place the gasket 3 into the inner cavity 121;

[0053] S4. Insert the pull rod 2 into the central through hole 112 so that the second end of the rod body 22 is threadedly connected to the second internal threaded section of the one-way valve, and continue to screw the screw to open the one-way valve;

[0054] S5. Connect the airtight - vacuum device to the conversion head 12 for vacuuming or airtightness testing;

[0055] S6. After the test, disconnect the airtight vacuum device and remove the tool.

[0056] The above description is only a specific embodiment of the present invention, so that those skilled in the art can understand or implement the present invention. Various modifications to these embodiments will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments described herein, but should conform to the widest scope consistent with the principles and novel features invented herein.

Claims

1. A one-way valve reverse airtight-vacuum extraction tool, It is characterized in that include: A conversion joint (1), comprising a joint body (11) and a conversion head (12), the outer side wall of the joint body (11) being provided with a coaxial first external thread section (111) and an O-ring (13), the first external thread section (111) being suitable for being threadedly connected to a first internal thread section of a one-way valve, the joint body (11) being provided with a central through hole (112) coaxial with the O-ring (13), the conversion head (12) being fixed to one end of the joint body (11) and being suitable for being connected to an airtight-vacuum device, the conversion head (12) being a cylindrical structure, the inner cavity (121) of the conversion head (12) being coaxial with and connected to the central through hole (112), the diameter of the inner cavity (121) being larger than the aperture of the central through hole (112); A pull rod (2), comprising a head (21) and a rod body (22), wherein the head (21) is fixed to the first end of the rod body (22) and is disposed in the inner cavity (121) of the conversion head (12), the rod body (22) passes through the central through hole (112) and the second end extends out of the central through hole (112), the second end of the rod body (22) is provided with a second external thread section (221), the second external thread section (221) is suitable for being threadedly connected to the second internal thread section of the one-way valve, and the head (21) is provided with a connecting portion suitable for connecting the central through hole (112) and the inner cavity (121).

2. The one-way valve reverse airtight-vacuum extraction tool according to claim 1, It is characterized in that Also includes: A washer (3) is pressed into the bottom of the inner cavity (121) through the head (21); the inner diameter of the washer (3) is greater than the diameter of the rod body (22); and the connecting portion is connected to the central through hole (112) through the inner hole of the washer (3).

3. The one-way valve reverse airtight-vacuum extraction tool according to claim 2, It is characterized in that The gasket (3) is clearance-matched with the inner cavity (121).

4. The one-way valve reverse airtight-vacuum extraction tool according to claim 3, It is characterized in that The gasket (3) is provided with a notch (31) connecting its inner circle and outer circle.

5. The one-way valve reverse airtight-vacuum extraction tool according to any one of claims 2 to 4, It is characterized in that The connecting portion is a plurality of notches (211) uniformly distributed along the circumference of the head (21), the notches (211) are arranged along the radial direction of the head (21), and the minimum diameter corresponding to the notches (211) is equal to the diameter of the rod body (22).

6. The one-way valve reverse airtight-vacuum extraction tool according to claim 5, It is characterized in that A cross groove (212) is provided on the end surface of the head (21) away from the rod body (22), and four notches (211) are provided corresponding to the cross grooves (212).

7. The one-way valve reverse airtight-vacuum extraction tool according to claim 1, It is characterized in that The outer side surface of the conversion head (12) is provided with a third external thread section (122) suitable for threading with an airtight vacuum device.

8. The one-way valve reverse airtight-vacuum extraction tool according to claim 1, It is characterized in that The outer side wall of the joint body (11) is further provided with a polygonal screwing portion (113), and the screwing portion (113) is located on a side of the first external thread section (111) close to the conversion head (12).

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