A quick-connect pressure-holding valve for automotive nylon tubing

Abstract

This utility model discloses a quick-connect pressure-holding valve for automotive nylon tubing, relating to the field of automotive parts technology. It includes a pressure-holding valve connector and a quick-connect connector connected together. The pressure-holding valve connector includes a pressure-holding valve body and a sealing rod. The pressure-holding valve body has a through-hole vertically extending into the air passage. The upper end of the sealing rod is slidably inserted into the air passage from bottom to top. When the sealing rod slides upward to a predetermined position, its lower end seals the lower opening of the air passage. The quick-connect connector includes a quick-connect body, a retaining ring, and a dustproof rod. The lower end of the quick-connect body is inserted into the air passage from top to bottom, and a through hole is provided in the middle of the quick-connect body. The retaining ring is located at the lower opening of the through hole. The dustproof rod is inserted into the through hole, and its lower end passes through the retaining ring, extends into the air passage, and extends to the upper end of the sealing rod.

Description

Technical Field

[0001] This utility model relates to the field of automotive parts technology, specifically to a quick-connect pressure-holding valve for automotive nylon tubing. Background Technology

[0002] A pressure-holding valve is a valve used to control the pressure inside a pipeline. Its main function is to automatically open the valve when the internal pressure of the pipeline exceeds a preset value, releasing the excess pressure and thus protecting the pipeline and equipment from damage due to excessive pressure. Existing pressure-holding valve structures cannot accommodate the rapid insertion of nylon tubing. Utility Model Content

[0003] In view of the deficiencies in the existing technology, the purpose of this utility model is to provide a quick-insertion pressure-holding valve for automotive nylon tubes, which can meet the requirements of quick insertion of nylon tubes, and maintain pressure when the tube is not inserted, and maintain bidirectional ventilation after insertion.

[0004] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a quick-connect pressure-holding valve for automotive nylon tubing, comprising a pressure-holding valve connector and a quick-connect connector connected together. The pressure-holding valve connector includes a pressure-holding valve body and a sealing rod. The pressure-holding valve body has an air passage extending vertically. The upper end of the sealing rod is slidably inserted into the air passage from bottom to top. When the sealing rod slides upward to a predetermined position, the lower end of the sealing rod can block the lower opening of the air passage. The quick-connect connector includes a quick-connect body, a retaining ring, and a dustproof rod. The lower end of the quick-connect body is inserted into the air passage from top to bottom, and a through hole is provided in the middle of the quick-connect body. The retaining ring is located at the lower opening of the through hole. The dustproof rod is inserted into the through hole, and the lower end of the dustproof rod passes through the retaining ring, extends into the air passage, and extends to the upper end of the sealing rod.

[0005] A further improvement is that a gap is left between the lower end of the dustproof rod and the upper end of the sealing rod.

[0006] A further improvement is made in that: the sealing rod includes a return spring and a hollow first rod body, a plug is provided at the lower end of the first rod body, a first sealing groove is provided on the outer side wall of the plug, and a first sealing ring is installed in the first sealing groove; an opening groove is provided on the side wall of the first rod body near the plug; the return spring is sleeved on the outside of the first rod body and is used to apply an upward elastic force to the first rod body.

[0007] A further improvement is that: a first flared mouth is provided at the lower opening of the air passage, a first limiting step adapted to the retaining ring is provided at the upper end of the air passage, and an internal thread adapted to the lower end of the quick-connect body is provided on the inner side wall of the air passage above the first limiting step.

[0008] A further improvement is that: a connector is provided at the lower end of the pressure holding valve body, a first external thread is provided on the outer side wall of the connector, and a second sealing ring is provided at the junction of the connector and the pressure holding valve body.

[0009] A further improvement is that the dustproof rod includes a second rod body, the upper end of which is provided with a dustproof cap, and the middle of the dustproof cap is provided with a positioning hole; the lower end of the second rod body is provided with a plurality of expansion springs, and at least one expansion spring is provided with two limiting protrusions adapted to the retaining ring, and the retaining ring is located between the two limiting protrusions.

[0010] A further improvement is that the upper end of the retaining ring tapers inward to form a conical surface, a notch is provided on one side of the retaining ring, a positioning plane is provided on the outer wall of the other side of the retaining ring, and several conical anti-detachment rings are provided on the inner wall of the retaining ring.

[0011] A further improvement is made in that: a second flared mouth is provided at the lower opening of the through hole, and a second sealing groove and an installation groove are provided sequentially from bottom to top on the upper end of the inner sidewall of the through hole; a third sealing ring is installed in the second sealing groove, and a compression sleeve is installed in the installation groove.

[0012] A further improvement is that the inner wall of the clamping sleeve is provided with a positioning groove, and a dustproof ring is installed in the positioning groove.

[0013] A further improvement is that: a nut boss is provided on the upper end of the outer side wall of the quick-connect body, and a fourth sealing ring is provided at the junction of the bottom of the nut boss and the quick-connect body; a second external thread is provided on the lower outer side wall of the quick-connect body to match the pressure-holding valve connector.

[0014] The beneficial effects of this utility model are as follows:

[0015] This invention enables rapid insertion of nylon tubing, maintains pressure when not inserted, and ensures bidirectional ventilation after insertion. Attached Figure Description

[0016] Figure 1 This is a perspective view of the quick-connect pressure-holding valve for automotive nylon tubing in this embodiment of the present invention;

[0017] Figure 2 This is a perspective view of the other side of the quick-connect pressure-holding valve for automotive nylon tubing in this embodiment of the present invention;

[0018] Figure 3 This is a cross-sectional view of the quick-connect pressure-holding valve for automotive nylon tubing in this embodiment of the present invention;

[0019] Figure 4 This is a schematic diagram of the pressure-holding valve connector in an embodiment of this utility model;

[0020] Figure 5This is an exploded view of the pressure-holding valve connector in an embodiment of this utility model;

[0021] Figure 6 This is a cross-sectional view of the pressure-holding valve connector in an embodiment of this utility model;

[0022] Figure 7 This is a schematic diagram of the structure of the pressure-holding valve body in an embodiment of this utility model;

[0023] Figure 8 This is a cross-sectional view of the pressure-holding valve body in an embodiment of the present utility model;

[0024] Figure 9 This is a schematic diagram of the sealing rod in an embodiment of the present invention;

[0025] Figure 10 This is a structural schematic diagram of the sealing rod from another perspective in an embodiment of this utility model;

[0026] Figure 11 This is a cross-sectional view of the sealing rod in an embodiment of the present invention;

[0027] Figure 12 This is a schematic diagram of the quick-connect connector in an embodiment of the present invention;

[0028] Figure 13 This is an exploded view of the quick-connect connector in an embodiment of this utility model;

[0029] Figure 14 This is a cross-sectional view of the quick-connect connector in an embodiment of this utility model;

[0030] Figure 15 This is a schematic diagram of the quick-connect body in an embodiment of the present invention;

[0031] Figure 16 This is a cross-sectional view of the quick-connect body in an embodiment of this utility model;

[0032] Figure 17 This is a schematic diagram of the sealing rod in an embodiment of the present invention;

[0033] Figure 18 This is a structural schematic diagram of the sealing rod from another perspective in an embodiment of this utility model;

[0034] Figure 19 This is a cross-sectional view of the sealing rod in an embodiment of the present invention;

[0035] Figure 20 This is a schematic diagram of the retaining ring in an embodiment of the present invention;

[0036] Figure 21 This is a cross-sectional view of the retaining ring in an embodiment of the present invention;

[0037] Figure 22 This is a schematic diagram of the compression sleeve in an embodiment of the present invention;

[0038] Figure 23 This is a cross-sectional view of the clamping sleeve in an embodiment of this utility model;

[0039] Figure 24 This is a diagram showing the working state of the quick-connect pressure-holding valve for automotive nylon tubing in this embodiment of the present invention.

[0040] Figure label:

[0041] 1-Pressure holding valve connector; 11-Pressure holding valve body; 111-Air passage; 112-First flare; 113-First limiting step; 114-Internal thread; 115-Connector part; 116-First external thread; 12-Sealing rod; 121-First rod body; 122-Plug; 123-First sealing groove; 124-Opening groove; 13-First sealing ring; 14-Reset spring; 15-Second sealing ring;

[0042] 2-Quick-connect connector; 21-Quick-connect body; 211-Second flared mouth; 212-Through hole; 213-Mounting groove; 214-Second sealing groove; 215-Nut boss; 216-Second external thread; 22-Dustproof rod; 221-Second rod body; 222-Dustproof cap; 223-Positioning hole; 224-Expansion spring; 225-Limiting protrusion; 23-Snap ring; 231-Notch; 232-Conical surface; 233-Conical anti-disengagement ring; 234-Positioning plane; 24-Pressure sleeve; 241-Positioning groove; 25-Dustproof ring; 26-Third sealing ring; 27-Fourth sealing ring. Detailed Implementation

[0043] The embodiments of this utility model are described in detail below. Examples of the embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout.

[0044] In the description of this utility model, it should be noted that the directional terms such as "center", "horizontal (X)", "longitudinal (Y)", "vertical (Z)", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", and "counterclockwise" indicate the orientation and positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. They should not be construed as limiting the specific protection scope of this utility model.

[0045] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features. Thus, the use of "first" and "second" to define a feature may explicitly or implicitly include one or more of that feature. In the description of this utility model, "several" or "a number" means two or more, unless otherwise explicitly specified.

[0046] The following description, in conjunction with the accompanying drawings, further illustrates specific embodiments of the present invention, making the technical solution and beneficial effects of the present invention clearer and more explicit. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain the present invention, but should not be construed as limiting the present invention.

[0047] See Figures 1-3 As shown, this utility model embodiment provides a quick-connect pressure-holding valve for automotive nylon tubing, including a pressure-holding valve connector 1 and a quick-connect connector 2 (quick-connect, non-quick-pull type).

[0048] See Figures 4-11 As shown, the pressure-holding valve connector 1 includes a pressure-holding valve body 11 and a sealing rod 12. The pressure-holding valve body 11 has a through-hole 111. The upper end of the sealing rod 12 is slidably inserted into the 111 from bottom to top. When the sealing rod 12 slides upward to a predetermined position, the lower end of the sealing rod 12 can block the lower opening of the 111. Specifically, the sealing rod 12 includes a return spring 14 and a hollow first rod body 121. A plug 122 is provided at the lower end of the first rod body 121. A first sealing groove 123 is provided on the outer side wall of the plug 122. A first sealing ring 13 is installed in the first sealing groove 123. An opening groove 124 is provided on the side wall of the first rod body 121 near the plug 122. The return spring 14 is sleeved on the outside of the first rod body 121 and is used to apply an upward elastic force to the first rod body 121. The lower opening of the air passage 111 is provided with a first flared mouth 112, and the upper end of the air passage 111 is provided with a first limiting step 113 adapted to the retaining ring 23. The inner sidewall of the air passage 111, above the first limiting step 113, is provided with an internal thread 114 adapted to the lower end of the quick-connect body 21. The lower end of the pressure holding valve body 11 is provided with a connector 115, the outer sidewall of the connector 115 is provided with a first external thread 116, and a second sealing ring 15 is provided at the junction of the connector 115 and the pressure holding valve body 11.

[0049] See Figures 12-23As shown, the quick-connect connector 2 includes a quick-connect body 21, a retaining ring 23, and a dustproof rod 22. The lower end of the quick-connect body 21 is inserted into the air passage 111 from top to bottom, and a through hole 212 is provided in the middle of the quick-connect body 21. The retaining ring 23 is located at the lower opening of the through hole 212. The dustproof rod 22 is inserted into the through hole 212, and the lower end of the dustproof rod 22 passes through the retaining ring 23, extends into the air passage 111, and extends to the upper end of the sealing rod 12. Specifically, a gap is left between the lower end of the dustproof rod 22 and the upper end of the sealing rod 12. The dustproof rod 22 includes a second rod body 221. A dustproof cap 222 is provided at the upper end of the second rod body 221, and a positioning hole 223 is provided in the middle of the dustproof cap 222. A plurality of expansion springs 224 are provided at the lower end of the second rod body 221, and at least one expansion spring 224 has two limiting protrusions 225 that are adapted to the retaining ring 23. The retaining ring 23 is located between the two limiting protrusions 225. The upper end of the retaining ring 23 converges inward to form a conical surface 232. A notch 231 is provided on one side of the retaining ring 23, and a positioning plane 234 is provided on the outer wall of the other side of the retaining ring 23. A plurality of conical anti-detachment rings 233 are provided on the inner wall of the retaining ring 23. A second flared opening 211 is provided at the lower end of the through hole 212. A second sealing groove 214 and a mounting groove 213 are sequentially provided from bottom to top on the upper end of the inner sidewall of the through hole 212. A third sealing ring 26 is installed in the second sealing groove 214, and a clamping sleeve 24 is installed in the mounting groove 213. A positioning groove 241 is provided on the inner sidewall of the clamping sleeve 24, and a dustproof ring 25 is installed in the positioning groove 241. A nut boss 215 is provided on the upper end of the outer sidewall of the quick-connect body 21, and a fourth sealing ring 27 is provided at the junction of the bottom of the nut boss 215 and the quick-connect body 21. A second external thread 216, compatible with the pressure-holding valve connector 1, is provided on the lower outer sidewall of the quick-connect body 21.

[0050] See Figure 24 As shown, the working principle of the quick-connect connector 2 of this utility model is as follows:

[0051] 1. The dustproof rod connects the quick-connect body and the retaining ring to form a whole that will not fall off. After the quick-connect is installed, the dustproof rod prevents dust from entering. When in use, simply pull out the dustproof rod and insert it into the tube.

[0052] 2. After the tube is inserted, the sealing ring inside the quick-connect fitting provides a seal. The dust seal prevents dust and dirt from entering the quick-connect fitting during use. The sealing ring at the threaded part of the fitting prevents air leakage at the threaded area.

[0053] 3. After the nylon tube is inserted through the retaining ring, the retaining ring's barbs have a conical structure, allowing for easy insertion. When the tube is pulled out, the retaining ring and the tube body move upwards together, where they are blocked by the conical surface inside the tube body. The retaining ring's barbs become increasingly embedded in the tube body, thus securing the tube body.

[0054] 4. If you want to remove the tube, you can only disassemble the quick connector, remove the tube body, reinstall the quick connector, and then reinsert the tube.

[0055] See Figure 24 As shown, the working principle of the pressure-holding valve connector 1 of this utility model is as follows:

[0056] 1. In the free state, the sealing rod is lifted by the spring, and the sealing ring on the sealing rod contacts the conical surface of the body, sealing the gas below to achieve a pressure-maintaining effect.

[0057] 2. When inserting the nylon tube, due to the action of the retaining ring, the nylon tube can only be inserted and cannot be pulled out. The nylon tube pushes open the sealing rod and remains in this state, the seal fails, and bidirectional airflow is achieved inside.

[0058] In the description of this specification, references to terms such as "an embodiment," "preferred," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of this utility model. Illustrative expressions of the above terms in this specification 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 one or more embodiments or examples.

[0059] Based on the above description of the structure and principle, those skilled in the art should understand that this utility model is not limited to the specific embodiments described above. Improvements and substitutions based on this utility model using techniques known in the art all fall within the protection scope of this utility model and should be defined by the claims.

Claims

1. A nylon tube quick connect pressure maintaining valve for an automobile, comprising a pressure maintaining valve connector (1) and a quick connect connector (2) connected to each other, characterized in that: The pressure holding valve connector (1) includes a pressure holding valve body (11) and a sealing rod (12). The pressure holding valve body (11) has an air passage (111) that runs vertically through it. The upper end of the sealing rod (12) can be slidably inserted into the air passage (111) from bottom to top. When the sealing rod (12) slides upward to a predetermined position, the lower end of the sealing rod (12) can block the lower opening of the air passage (111). The quick-connect connector (2) includes a quick-connect body (21), a retaining ring (23), and a dustproof rod (22); the lower end of the quick-connect body (21) is inserted into the air passage (111) from top to bottom, and a through hole (212) is provided in the middle of the quick-connect body (21); the retaining ring (23) is provided at the lower opening of the through hole (212); the dustproof rod (22) is inserted into the through hole (212), and the lower end of the dustproof rod (22) passes through the retaining ring (23), extends into the air passage (111), and extends to the upper end of the sealing rod (12).

2. The quick-connect pressure-holding valve for automotive nylon tubing according to claim 1, characterized in that: There is a gap between the lower end of the dustproof rod (22) and the upper end of the sealing rod (12).

3. The quick-connect pressure-holding valve for automotive nylon tubing according to claim 1, characterized in that: The sealing rod (12) includes a return spring (14) and a hollow first rod body (121). A plug (122) is provided at the lower end of the first rod body (121). A first sealing groove (123) is provided on the outer side wall of the plug (122). A first sealing ring (13) is installed in the first sealing groove (123). An opening groove (124) is provided on the side wall of the first rod body (121) near the plug (122). The return spring (14) is sleeved on the outside of the first rod body (121) and is used to apply an upward elastic force to the first rod body (121).

4. The quick-connect pressure-holding valve for automotive nylon tubing according to claim 1, characterized in that: The lower end of the air passage (111) is provided with a first flared mouth (112), the upper end of the air passage (111) is provided with a first limiting step (113) that is compatible with the retaining ring (23), and the inner sidewall of the air passage (111) is provided with an internal thread (114) that is compatible with the lower end of the quick-connect body (21) at a position above the first limiting step (113).

5. The quick-connect pressure-holding valve for automotive nylon tubing according to claim 1, characterized in that: The lower end of the pressure holding valve body (11) is provided with a connector (115), the outer side wall of the connector (115) is provided with a first external thread (116), and a second sealing ring (15) is provided at the junction of the connector (115) and the pressure holding valve body (11).

6. The quick-connect pressure-holding valve for automotive nylon tubing according to claim 1, characterized in that: The dustproof rod (22) includes a second rod body (221), the upper end of the second rod body (221) is provided with a dustproof cap (222), and the middle part of the dustproof cap (222) is provided with a positioning hole (223); the lower end of the second rod body (221) is provided with a plurality of expansion springs (224), and at least one expansion spring (224) is provided with two limiting protrusions (225) that are adapted to the retaining ring (23), and the retaining ring (23) is located between the two limiting protrusions (225).

7. The quick-connect pressure-holding valve for automotive nylon tubing according to claim 1, characterized in that: The upper end of the retaining ring (23) is tapered inward to form a conical surface (232). A notch (231) is provided on one side of the retaining ring (23). A positioning plane (234) is provided on the outer wall of the other side of the retaining ring (23). Several conical anti-detachment rings (233) are provided on the inner wall of the retaining ring (23).

8. The quick-connect pressure-holding valve for automotive nylon tubing according to claim 1, characterized in that: The lower opening of the through hole (212) is provided with a second flared mouth (211), and the upper end of the inner sidewall of the through hole (212) is provided with a second sealing groove (214) and an installation groove (213) from bottom to top; a third sealing ring (26) is installed in the second sealing groove (214), and a clamping sleeve (24) is installed in the installation groove (213).

9. The quick-connect pressure-holding valve for automotive nylon tubing according to claim 8, characterized in that: The inner wall of the clamping sleeve (24) is provided with a positioning groove (241), and a dustproof ring (25) is installed in the positioning groove (241).

10. The quick-connect pressure-holding valve for automotive nylon tubing according to claim 1, characterized in that: The upper end of the outer side wall of the quick-connect body (21) is provided with a nut boss (215), and a fourth sealing ring (27) is provided at the junction of the bottom of the nut boss (215) and the quick-connect body (21); the lower end of the outer side wall of the quick-connect body (21) is provided with a second external thread (216) that is compatible with the pressure holding valve connector (1).

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