A quick-connect connector for a hinged pneumatic brake flow restrictor valve

Abstract

This utility model discloses a quick-connect fitting for a hinged pneumatic brake flow-limiting valve, relating to the field of quick-connect fitting technology. It includes a straight-insertion fitting body, a hinged steering body, and a flow-limiting valve core. One end of the straight-insertion fitting body is connected to the valve port of the valve body, and the other end of the straight-insertion fitting body is rotatably mounted with the hinged steering body, which houses the flow-limiting valve core. The flow-limiting valve core limits excessive air pressure, preventing pressure fluctuations in the pipeline and ensuring the fitting is resistant to excessive impact, thus providing a buffering effect. The hinged steering body and the flow-limiting valve are integrally embedded, allowing them to rotate concentrically. By fixing the hinged clamping sleeve in the forward direction and assembling a lugless elastic retaining ring, the hinged fitting body can rotate freely. The gap in the flow-limiting valve core stores a certain amount of pressure, preventing pressure loss. The end of the flow-limiting valve core has a guiding function, preventing incorrect assembly and increasing recognizability.

Description

Technical Field

[0001] This utility model relates to the field of quick-connect coupling technology, and in particular to a quick-connect coupling for a hinged pneumatic brake flow restrictor valve. Background Technology

[0002] The piping systems used in commercial vehicle braking systems mostly employ quick-connect couplings. These straight-in quick-connect couplings are primarily used in fixed and rotary types, offering flexible installation. They can also be rotated using specialized tools. Among the various control valves in the braking system, such as four-circuit protection valves, quick-release valves, pressure reducing valves, relay valves, master cylinders, EBS, ABS, ESC, etc., these control valves need to be rotatable and have functions such as detection and flow limiting. Furthermore, dangerous goods transport trucks should be equipped with electronic braking systems, which require couplings with detection and flow limiting functions. Rotatable couplings facilitate installation and avoid installation interference. To meet the requirements of installation efficiency, prevent excessive braking pressure, prevent pressure loss, better adapt to system safety, prevent rear wheel lock-up, and ensure high connection reliability, it is necessary to develop corresponding quick-connect couplings with flow limiting valve functions. Utility Model Content

[0003] The purpose of this utility model is to provide a quick-connect fitting for a hinged pneumatic brake flow restrictor valve to solve the problems existing in the prior art. It features quick installation, easy assembly, and is not easily disassembled after assembly, thus ensuring the reliability of the connection. At the same time, it also serves as a flow restrictor and buffer for the assembly pipeline.

[0004] To achieve the above objectives, the present invention provides the following solution: The present invention provides a quick-connect fitting for a hinged pneumatic brake flow restrictor valve, comprising a straight-insertion fitting body, a hinged steering body, and a flow restrictor valve core. One end of the straight-insertion fitting body is connected to the valve port of the valve body, and the other end of the straight-insertion fitting body is rotatably mounted with the hinged steering body. The flow restrictor valve core is assembled inside the hinged steering body.

[0005] In one embodiment, a sealing ring is installed on the inner wall of the valve port connection end of the plug-in connector body, and the sealing ring is connected to the valve port to form a seal.

[0006] In one embodiment, the inner wall of the direct-insertion connector body connected to the valve port of the valve body is further provided with a positioning ring and a clamping sleeve in sequence. The positioning ring is used to install and position the valve port of the valve body; the pressure ring at the valve port is pressed against the clamping sleeve.

[0007] In one embodiment, a spacer is also provided between the sealing ring and the positioning ring.

[0008] In one embodiment, an anti-misalignment hinge clamping sleeve is installed on the inner wall of the direct-insertion connector body and the connecting end of the articulated steering body, and the articulated steering body is rotatably engaged in the anti-misalignment hinge clamping sleeve.

[0009] In one embodiment, a sealing ring is provided between the connecting end of the articulated steering body and the inner wall of the straight-insertion connector body.

[0010] In one embodiment, a spring retainer is provided at the anti-misalignment hinge clamping sleeve, and the articulated steering body is engaged in the anti-misalignment hinge clamping sleeve by the spring retainer.

[0011] In one embodiment, the spring retainer is a lugless spring retainer.

[0012] In one embodiment, the earless spring retainer ring adopts a double retainer ring structure, with each retainer ring being a semi-arc structure and the two retainer rings being symmetrically arranged.

[0013] In one embodiment, a sealing ring is installed on the inner wall of the articulated steering body, and the flow limiting valve core is connected to the sealing ring to form a seal.

[0014] The present invention achieves the following beneficial technical effects compared to the prior art:

[0015] The quick-connect fitting of the articulated pneumatic brake flow-limiting valve of this utility model includes a straight-insertion fitting body, an articulated steering body, and a flow-limiting valve core. One end of the straight-insertion fitting body is connected to the valve port of the valve body, and the other end of the straight-insertion fitting body is rotatably mounted with the articulated steering body, which is equipped with the flow-limiting valve core. The use of the flow-limiting valve core can limit excessive air pressure, preventing air pressure fluctuations in the pipeline, ensuring that the air pressure does not cause excessive impact on the fitting, and acting as a buffer; it improves assembly efficiency, facilitates the inspection of incorrect installation, is very suitable for connection, and improves product quality. The articulated steering body and the flow-limiting valve are integrally embedded, allowing them to rotate concentrically. By fixing the articulated clamping sleeve in the forward direction and assembling a lugless elastic retaining ring, the articulated fitting body can be freely rotated. The gap in the flow-limiting valve core can store a certain amount of pressure to prevent pressure loss. The end of the flow-limiting valve core has a guiding function, preventing incorrect installation and increasing recognizability. Attached Figure Description

[0016] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0017] Figure 1This diagram shows the assembly method of the quick-connect fitting for a hinged pneumatic brake flow restrictor valve in a bend.

[0018] Figure 2 This diagram illustrates the assembly method of the quick-connect fitting for a straight-through articulated pneumatic brake flow restrictor.

[0019] Figure 3 This is a diagram illustrating the assembly method of the quick-connect fitting for a hinged pneumatic brake flow restrictor valve in a three-way valve.

[0020] Figure 4 This is a schematic diagram of the flow-limiting valve core.

[0021] Among them, 1. Straight-insertion connector body; 2. Sealing ring; 3. Spacer; 4. Positioning ring; 5. Compression sleeve; 6. Pressure ring; 7. Spring retaining ring; 8. Articulated steering body; 9. Flow limiting valve core; 91. Guide anti-misalignment zone; 92. Buffer flow limiting zone; 93. Fixed limit zone; 10. Anti-misalignment articulated compression sleeve. Detailed Implementation

[0022] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0023] The purpose of this utility model is to provide a quick-connect fitting for a hinged pneumatic brake flow restrictor valve to solve the problems existing in the prior art. It features quick installation, easy assembly, and is not easily disassembled after assembly, thus ensuring the reliability of the connection. At the same time, it also serves as a flow restrictor and buffer for the assembly pipeline.

[0024] To make the above-mentioned objectives, features and advantages of this utility model more apparent and understandable, the utility model will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0025] like Figures 1-3 As shown, this utility model provides a quick-connect connector for a hinged pneumatic brake flow limiting valve, including a straight-insertion connector body 1, a hinged steering body 8, and a flow limiting valve core 9. One end of the straight-insertion connector body 1 is connected to the valve port of the valve body, and the other end of the straight-insertion connector body 1 is rotatably mounted with the hinged steering body 8. The flow limiting valve core 9 is assembled inside the hinged steering body 8.

[0026] In one embodiment, a sealing ring 2 is installed on the inner wall of the valve port connection end of the direct-insertion connector 1, and the sealing ring 2 is connected to the valve port to form a seal; a positioning ring 4 and a clamping sleeve 5 are also sequentially arranged on the inner wall of the valve port connection end of the direct-insertion connector 1, the positioning ring 4 is used to install and position the valve port of the valve body; a pressure ring 6 at the valve port is pressed against the clamping sleeve 5; a spacer 3 is also provided between the sealing ring 2 and the positioning ring 4.

[0027] The straight-insertion connector body 1 is connected to the valve ports of each valve body via threads. The sealing ring 2 on the straight-insertion connector body 1 is compressed and connected to the valve to form a seal. Both ends of the straight-insertion connector body 1 can be connected in this manner. Figure 1 , Figure 2 and Figure 3 As shown, for other straight-through connectors 1 such as bends, straight-throughs, and tees, when pre-installed on the valve, after the straight-through connector 1 is connected to the valve through internal and external threads, the straight-through connector 1 is required to remain in one direction while the hinged steering body 8 rotates to achieve the function of steerable flow restriction.

[0028] In one embodiment, an anti-misalignment hinge clamping sleeve 10 is installed on the inner wall of the direct-insertion connector body 1 and the connection end of the articulated steering body 8, and the articulated steering body 8 is rotatably engaged in the anti-misalignment hinge clamping sleeve 10.

[0029] In one embodiment, a sealing ring 2 is provided between the connecting end of the articulated steering body 8 and the inner wall of the straight-insertion connector body 1.

[0030] In one embodiment, a spring retainer ring 7 is provided at the anti-misalignment hinge clamping sleeve 10 (which has been disclosed in the invention patent with publication number CN114962829A, and will not be described in detail here). The articulated steering body 8 is snapped into the anti-misalignment hinge clamping sleeve 10 by the spring retainer ring 7. The spring retainer ring 7 is an earless spring retainer ring 7. The earless spring retainer ring 7 adopts a double retainer ring structure, each retainer ring is a semi-arc structure, and the two retainer rings are symmetrically arranged. A sealing ring 2 is installed on the inner wall of the articulated steering body 8, and the flow limiting valve core 9 is connected to the sealing ring 2 to form a seal.

[0031] like Figure 4As shown, the flow-limiting valve core 9 is composed of three sections: the first section is the guide error-prevention zone 91, the middle section is the buffer flow-limiting zone 92, and the last section is the fixed limiting zone 93. The surface of the fixed limiting zone 93 is provided with several error-prevention protrusions, the vertical cross-section of which is trapezoidal. The flow-limiting valve core 9 is a hollow cylinder, with a chamfered edge at the front end and a flared shape at the rear end. This invention, by giving the flow-limiting valve core 9 an error-prevention function, significantly saves assembly time in automated production. Using the flow-limiting valve core 9 prevents assembly errors, reduces the labor intensity of operators, improves assembly efficiency, facilitates the inspection of misassemblies, and is highly suitable for connections, thus improving product quality.

[0032] Specifically, the flow-limiting valve core 9 limits excessive air pressure, preventing impact on the valve body's sealing ring, buffer tank, etc. The flow-limiting valve core 9, with its guiding function, acts as a mis-proofing mechanism, preventing assembly errors. The assembly of the flow-limiting valve core 9 is inherently identifiable. The first section, the guide and mis-proofing zone 91, specifically guides and limits the flow, and is coaxial with the steering body using an interference fit. The second section is the buffer flow-limiting zone 92, which buffers the airflow using a symmetrical 4-hole design, thus dispersing and buffering excess air pressure. The third section, the fixed limiting zone 93, fixes the steering body using a trapezoidal groove design with a transition fit, ensuring a defined installation position and preventing the flow-limiting valve core from rotating or moving within the steering body.

[0033] Working principle of flow limiting valve core 9:

[0034] Gas enters through the fixed limiting zone 93. Due to the large cross-sectional area of ​​the through-hole in the fixed limiting zone 93, a large amount of gas passes through, forming a large volume of gas in a short time. Then, it passes through the buffer flow limiting zone 92. Because the buffer flow limiting zone 92 is open and has a large gap with the articulated steering body 8, some gas dissipates outward through the four rectangular holes and enters the gap between the articulated steering body 8 and the flow limiting valve core 9, forming an airflow circulation and remaining in the sealed space. Another portion of the gas enters the assembly connector through the guide error prevention zone 91. This diversion of the two gas flows reduces the original gas pressure, thus achieving the purpose of flow limiting. When the air compressor briefly stops supplying gas, the gas stored in the buffer flow limiting zone 92 will replenish some of the gas, allowing for a continuous gas supply. At the same time, reducing fluctuations also reduces the impact of gas on sealing parts, thereby reducing the pressure on the whole vehicle. This avoids braking system failure caused by pressure fluctuations or overload, and also prevents brake lock-up due to excessive braking pressure, thus improving safe driving.

[0035] This utility model specifically relates to a hinged, flow-limiting quick-connect air brake connector, primarily used for connecting automotive air brake lines. It comprises a straight-insertion connector body 1 and a hinged steering body 8. In its component state, after the straight-insertion connector body 1 is assembled, anti-misalignment hinge clamping sleeves 10 are installed onto the hinged steering body 8. After the anti-misalignment hinge clamping sleeves 10 are fully installed, a groove on the hinged steering body 8 aligns with the end of the anti-misalignment hinge clamping sleeve 10, and is secured by a retaining ring without ear loops. These retaining rings are heat-treated to provide excellent elasticity, preventing continuous contact. To ensure reliable connection, a double retaining ring is used. Due to the semi-circular structure of the retaining ring, it will not fall off after installation. This prevents the anti-misalignment hinge clamping sleeve 10 from falling off the articulated steering body 8 and ensures that the articulated steering body 8 and the anti-misalignment hinge clamping sleeve 10 can rotate freely. Then, the sealing ring 2 is installed on the articulated steering body 8, followed by the assembly of the flow limiting valve core 9, which serves to limit flow and buffer. The assembled articulated steering body 8 assembly is then installed onto the quick-connect body to form a free-rotating quick-connect assembly with flow limiting function.

[0036] Cross-sectional and 3D views of quick-connect fittings for bends, multi-way fittings, and tee fittings are available in [reference needed]. Figure 1-3 .

[0037] The flow-limiting valve core 9 limits excessive air pressure, preventing impact on the valve body's sealing ring 2, buffer tank, etc. The flow-limiting valve core 9, with its guiding function, prevents incorrect assembly. The error-proof hinged clamping sleeve 10 has identifiable correct and incorrect assembly orientation; incorrect assembly will result in assembly failure. Correct assembly allows for smooth insertion into the main body of the hinged steering body 8, clearly indicating the correct position. Incorrect assembly will result in failure to insert into the main body, with the end protruding, and the inability to assemble the earless elastic retaining ring, ultimately preventing subsequent installation into the main body.

[0038] The quick-connect connector of the articulated air brake flow limiting valve in this utility model mainly solves the problem of articulated flow limiting of straight-plug quick-connect connectors. During vehicle assembly, the air pressure of the vehicle may sometimes be abnormal. Flow limiting in the air brake line is mainly achieved through the use of a flow limiting device. This device can effectively control the pressure in the brake line, preventing damage to the braking system or other safety problems caused by excessive pressure. The function of the flow limiting device is to prevent pressure loss. In case of failure, using a flow limiting valve core 9 or other flow limiting devices can prevent pressure loss in the braking equipment and maintain stable braking pressure. It improves system safety by preventing excessive pressure in the brake line, avoiding braking system failure due to pressure fluctuations or overload. It prevents rear wheel lock-up; in some braking systems, the flow limiting device can prevent rear wheel lock-up due to excessive braking pressure, thereby improving vehicle braking performance and safety. It also significantly reduces the labor intensity of operators. The integrated design avoids the need for built-in valve cores in the pipeline, while also reducing the risk of leakage. It also meets assembly requirements. The assembly connectors are easy to connect, have a simple structure, and allow for quick plugging and unplugging. Given the requirement for high connection reliability, we need to develop quick-connect connectors with corresponding functions. Therefore, this type of connector has the functions of rotation, error prevention, and current limiting.

[0039] It should be noted that, for those skilled in the art, it is obvious that this utility model is not limited to the details of the above exemplary embodiments, and that it can be implemented in other specific forms without departing from the spirit or essential characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects, and the scope of this utility model is defined by the appended claims rather than the foregoing description. Therefore, all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model, and no reference numerals in the claims should be construed as limiting the scope of the claims.

[0040] This utility model uses specific examples to illustrate its principles and implementation methods. The above description of the embodiments is only for the purpose of helping to understand the method and core idea of ​​this utility model. At the same time, for those skilled in the art, there will be changes in the specific implementation methods and application scope based on the idea of ​​this utility model. In summary, the content of this specification should not be construed as a limitation of this utility model.

Claims

1. A quick-connect fitting for a hinged pneumatic brake flow restrictor valve, characterized in that: It includes a straight-insertion connector body, a hinged steering body, and a flow-limiting valve core. One end of the straight-insertion connector body is connected to the valve port of the valve body, and the other end of the straight-insertion connector body is rotatably mounted with the hinged steering body. The flow-limiting valve core is assembled inside the hinged steering body.

2. The quick-connect fitting for the articulated pneumatic brake flow limiting valve according to claim 1, characterized in that: A sealing ring is installed on the inner wall of the valve port connection end of the direct-insertion connector body, and the sealing ring is connected to the valve port to form a seal.

3. The quick-connect fitting for the articulated pneumatic brake flow limiting valve according to claim 2, characterized in that: The inner wall of the direct-insertion connector body, which connects to the valve port of the valve body, is also provided with a positioning ring and a clamping sleeve in sequence. The positioning ring is used to install and position the valve port of the valve body; the pressure ring at the valve port is pressed against the clamping sleeve.

4. The quick-connect fitting for the articulated pneumatic brake flow limiting valve according to claim 3, characterized in that: A spacer is also provided between the sealing ring and the positioning ring.

5. The quick-connect fitting for the articulated pneumatic brake flow limiting valve according to claim 1, characterized in that: An anti-misalignment hinge clamping sleeve is installed on the inner wall of the direct-insertion connector body and the connection end of the articulated steering body. The articulated steering body is rotatably engaged in the anti-misalignment hinge clamping sleeve.

6. The quick-connect fitting for the articulated pneumatic brake flow limiting valve according to claim 5, characterized in that: A sealing ring is provided between the connecting end of the articulated steering body and the inner wall of the straight-insertion connector body.

7. The quick-connect fitting for the articulated pneumatic brake flow limiting valve according to claim 5, characterized in that: A spring retainer ring is provided at the anti-misalignment hinge clamping sleeve, and the hinged steering body is engaged in the anti-misalignment hinge clamping sleeve by the spring retainer ring.

8. The quick-connect fitting for the articulated pneumatic brake flow limiting valve according to claim 7, characterized in that: The spring retainer is a lugless spring retainer; the lugless spring retainer adopts a double retainer structure, each retainer is a semi-arc structure, and the two retainers are symmetrically arranged.

9. The quick-connect fitting for the articulated pneumatic brake flow limiting valve according to claim 1, characterized in that: The inner wall of the articulated steering body is fitted with a sealing ring, and the flow limiting valve core is connected to the sealing ring to form a seal.

10. The quick-connect fitting for the articulated pneumatic brake flow limiting valve according to claim 1, characterized in that: The flow limiting valve core is composed of three sections: the first section is the guide and error prevention zone, the middle section is the buffer flow limiting zone, and the last section is the fixed limiting zone. The surface of the fixed limiting zone is provided with several error prevention protrusions, and the vertical cross-sectional shape of the error prevention protrusions is set in a trapezoidal shape. The flow limiting valve core is set in a hollow cylindrical shape, the front edge of the flow limiting valve core is chamfered, and the rear end of the flow limiting valve core is set in a flared shape.

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