Quick-change hydraulic control one-way valve for teaching

Abstract

The utility model provides a kind of quick switching hydraulic control check valve for teaching, including valve body and threaded plug-in hydraulic control check valve, valve body has check valve threaded connection mouth, A threaded connection mouth, B threaded connection mouth and X threaded connection mouth;Valve body has first oil channel, second oil channel, third oil channel, fourth oil channel, fifth oil channel and valve cavity, threaded plug-in hydraulic control check valve is connected with check valve threaded connection mouth thread;Threaded plug-in hydraulic control check valve separates out sealed cavity b, sealed cavity a and sealed cavity x respectively;First oil channel is communicated with second oil channel;Second oil channel is communicated with third oil channel;Third oil channel is communicated with sealed cavity a;Fourth oil channel is communicated with sealed cavity b;Fifth oil channel is communicated with sealed cavity x;A threaded connection mouth is communicated with first oil channel, B threaded connection mouth is communicated with fourth oil channel, X threaded connection mouth is communicated with fifth oil channel.The utility model has the beneficial effects of lightweight design, convenient operation;Quick switching, efficiency is doubled;Sealing is reliable, leakage is sharply reduced.

Description

Technical Field

[0001] This utility model relates to a quick-connect hydraulic control check valve for teaching purposes. Background Technology

[0002] Hydraulic transmission is an important teaching content for mechanical engineering majors. As a key control component of hydraulic systems, the working principle and application experiments of the hydraulic control check valve are a core part of hydraulics teaching. Currently, hydraulic laboratories in universities and vocational colleges generally use standard industrial hydraulic control check valves for teaching demonstrations and experimental operations. These valves are typically connected to the hydraulic lines of the experimental platform via threaded pipe fittings.

[0003] The existing teaching experimental equipment has the following main problems: First, standard industrial hydraulic check valves are large and heavy, and the valve blocks are mostly made of steel, making it inconvenient for students to frequently disassemble and move them; second, the threaded connection method requires the use of tools such as wrenches, and the connection and disassembly of each oil port takes a long time, resulting in low hands-on efficiency for students within the limited class time; third, repeated disassembly and assembly can easily lead to thread wear and damage to the sealing ring, causing oil leakage, which not only pollutes the experimental environment but also increases maintenance costs and safety hazards; in addition, the industrial valve interface standard does not match the rapid connection requirements of the teaching experimental platform, making it difficult to achieve rapid pipeline replacement, which affects the teaching progress and experimental results.

[0004] Therefore, existing technologies are insufficient to meet the requirements of modern hydraulic teaching for ease of operation, experimental efficiency, and safety and environmental protection. There is an urgent need for a lightweight hydraulic control check valve device that is specifically designed for teaching and can be quickly connected and disassembled.

[0005] The existing technology has the following main defects and shortcomings:

[0006] (1) Poor ease of operation: The industrial hydraulic check valve uses a threaded pipe joint connection method, which requires the use of tools such as wrenches for tightening. Each disassembly and assembly takes a long time. In the limited experimental class time, the number of times students can actually operate is limited, which makes it difficult to meet the teaching needs of repeated practice.

[0007] (2) Insufficient adaptability to teaching: Standard industrial valve blocks are generally made of steel, which are large in size and heavy in weight. Students have to carry and disassemble them frequently, which is labor-intensive and does not meet the lightweight and portable characteristics of teaching devices, thus affecting the experimental experience.

[0008] (3) Significant reliability issues: Threaded connections are prone to problems such as thread wear, seal damage, and improper tightening torque during repeated disassembly and assembly, leading to frequent hydraulic oil leaks. Leaks not only waste oil and pollute the environment, but also pose safety hazards, while increasing equipment maintenance costs and experimental preparation time. Summary of the Invention

[0009] The problem this invention aims to solve is to provide a quick-connect hydraulic control check valve for teaching purposes, overcoming the shortcomings of existing technologies.

[0010] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a quick-connect hydraulic control check valve for teaching, including a valve body and a threaded hydraulic control check valve, wherein one side of the valve body has a check valve threaded connection port, and the valve body has an A threaded connection port, a B threaded connection port and an X threaded connection port.

[0011] The valve body has a first oil passage, a second oil passage, a third oil passage, a fourth oil passage, a fifth oil passage, and a valve cavity adapted to the threaded plug-in hydraulic control check valve. The valve cavity is connected to the threaded connection port of the check valve, and the threaded plug-in hydraulic control check valve is threadedly connected to the threaded connection port of the check valve.

[0012] The threaded hydraulic control check valve isolates the valve cavity into sealing cavity b, sealing cavity a, and sealing cavity x, respectively. The sealing cavity a, the sealing cavity b, and the sealing cavity x are distributed along the axial direction of the valve cavity from near the threaded connection port of the check valve towards the interior of the valve body.

[0013] One end of the first oil passage is connected to the outside of the valve body, and the other end is connected to the second oil passage; one end of the second oil passage is connected to the outside of the valve body, and the other end is connected to the third oil passage; one end of the third oil passage is connected to the outside of the valve body, and the other end is connected to the sealing cavity a; one end of the fourth oil passage is connected to the outside of the valve body, and the other end is connected to the sealing cavity b; one end of the fifth oil passage is connected to the outside of the valve body, and the other end is connected to the sealing cavity x.

[0014] The A threaded connection is connected to the first oil passage, the B threaded connection is connected to the fourth oil passage, and the X threaded connection is connected to the fifth oil passage.

[0015] The A-threaded connection port is connected to an A-port quick-change connector, the B-threaded connection port is connected to a B-port quick-change connector, and the X-threaded connection port is connected to an X-port quick-change connector.

[0016] A ball plug is provided at the end of the first oil passage, the second oil passage, the third oil passage, the fourth oil passage, and the fifth oil passage that is connected to the valve body.

[0017] Optionally, a sealing ring is provided between the threaded hydraulic control check valve and the threaded connection port of the check valve.

[0018] Optionally, the A-port quick-change connector, the B-port quick-change connector, and the X-port quick-change connector are all self-closing quick-change connectors.

[0019] Optionally, the quick-change connectors A, B, and X all integrate a steel ball locking mechanism and an automatic sealing valve core.

[0020] The advantages and positive effects of this utility model are:

[0021] (1) Lightweight design and easy operation: The valve block is made of high-strength aluminum alloy material, which is about 50% lighter than the traditional steel valve block. Students can operate it with one hand, which greatly reduces the labor intensity when frequently disassembling and assembling, and significantly improves the ease of operation of teaching experiments.

[0022] (2) Quick connection, doubled efficiency: The oil port is equipped with a self-closing quick-connect coupling, which realizes the pipeline "one plug and it is connected, one pull and it is disconnected", without the need for wrenches or other tools. The connection time is shortened from 3-5 minutes of traditional threaded connection to less than 10 seconds, and the effective experimental time is increased by more than 50%, which meets the needs of repeated practice and teaching.

[0023] (3) Reliable sealing and significantly reduced leakage: The quick-change connector has a built-in automatic sealing valve core, which, together with the end face sealing structure, fundamentally solves the problem of seal ring wear and leakage caused by repeated disassembly and assembly of threaded connections. The cleanliness of the experimental bench is significantly improved, and safety hazards are eliminated.

[0024] (4) Compact structure and modular integration: The hydraulic control check valve, oil circuit channel and quick-change interface are integrated into a valve block of 99mm×74mm×35mm, which is about 40% smaller than the industrial valve. This makes it easy to flexibly arrange and quickly assemble various hydraulic circuits on the experimental platform, realizing the modularization and standardization of the teaching device. Attached Figure Description

[0025] Figure 1 This is a schematic diagram of the overall structure of a specific embodiment of this utility model;

[0026] Figure 2 yes Figure 1 A perspective structural diagram;

[0027] Figure 3 yes Figure 1 Schematic diagram of the middle valve body structure;

[0028] Figure 4 yes Figure 1 Schematic diagram of a threaded hydraulic control check valve;

[0029] Figure 5 yes Figure 3 Perspective structural diagram;

[0030] In the diagram: 1. Threaded hydraulic control check valve; 1-1. Threaded hydraulic control check valve connecting thread; 1-2. Inlet / outlet ports; 1-3. Sealing ring; 1-4. First O-ring; 1-5. Second O-ring; 2. Valve body; 2-1. Check valve threaded connection port; 2-2. A threaded connection port; 2-3. B threaded connection port; 2-4. X threaded connection port; 2-5. Valve cavity; 2-5-1. Sealing cavity a; 2-5-2. Sealing cavity b; 2-5-3. Sealing cavity x; 2-6. First oil passage; 2-7. Second oil passage; 2-8. Third oil passage; 2-9. Fourth oil passage; 2-10. Fifth oil passage; 3. Ball plug; 4. A-port quick-change connector; 5. B-port quick-change connector; 6. X-port quick-change connector. Detailed Implementation

[0031] The present invention will be further described in detail below with reference to specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the present invention. In the description of the present invention, it should be understood that the terms "center," "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer," etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings and are only for the convenience of describing the present invention 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, and therefore should not be construed as a limitation of the present invention. In the description of the present invention, it should be noted that unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, it can refer to a fixed connection, a detachable connection, or an integral connection; it can refer to a mechanical connection or an electrical connection; it can refer to a direct connection or an indirect connection through an intermediate medium; it can refer to the internal connection of two components. For those skilled in the art, the specific meaning of the above terms in the present invention can be understood through specific circumstances.

[0032] like Figures 1-5 As shown, this utility model provides a quick-connect hydraulic control check valve for teaching, including a valve body 2 and a threaded hydraulic control check valve 1. One side of the valve body 2 has a check valve threaded connection port 2-1, and the valve body 2 has an A threaded connection port 2-2, a B threaded connection port 2-3 and an X threaded connection port 2-4.

[0033] The valve body 2 has a first oil passage 2-6, a second oil passage 2-7, a third oil passage 2-8, a fourth oil passage 2-9, a fifth oil passage 2-10, and a valve cavity 2-5 adapted to the threaded hydraulic control check valve 1. The valve cavity 2-5 is connected to the threaded connection port 2-1 of the check valve. The threaded hydraulic control check valve 1 is threadedly connected to the threaded connection port 2-1 of the check valve. A sealing ring 1-3 is provided between the two to increase the sealing performance.

[0034] The threaded hydraulic control check valve 1 isolates the valve chamber 2-5 into sealing chambers b2-5-2, a2-5-1, and x2-5-3, respectively. The sealing chambers a2-5-1, b2-5-2, and x2-5-3 are distributed along the axial direction of the valve chamber 2-5 from near the threaded connection port 2-1 of the check valve towards the interior of the valve body 2.

[0035] One end of the first oil passage 2-6 is connected to the outside of the valve body 2, and the other end is connected to the second oil passage 2-7; one end of the second oil passage 2-7 is connected to the outside of the valve body 2, and the other end is connected to the third oil passage 2-8; one end of the third oil passage 2-8 is connected to the outside of the valve body 2, and the other end is connected to the sealing cavity a2-5-1; one end of the fourth oil passage 2-9 is connected to the outside of the valve body 2, and the other end is connected to the sealing cavity b2-5-2; one end of the fifth oil passage 2-10 is connected to the outside of the valve body 2, and the other end is connected to the sealing cavity x2-5-3.

[0036] A threaded connection port 2-2 is connected to the first oil passage 2-6, B threaded connection port 2-3 is connected to the fourth oil passage 2-9, and X threaded connection port 2-4 is connected to the fifth oil passage 2-10;

[0037] Connect quick-change connector 4 to threaded connector 2-2; connect quick-change connector 5 to threaded connector 2-3; connect quick-change connector 6 to threaded connector 2-4.

[0038] A ball plug 3 is installed at the end of the first oil passage 2-6, the second oil passage 2-7, the third oil passage 2-8, the fourth oil passage 2-9, and the fifth oil passage 2-10 that is connected to the valve body 2.

[0039] The A-port quick-change connector 4, B-port quick-change connector 5, and X-port quick-change connector 6 are all self-closing quick-change connectors. The A-port quick-change connector 5, the B-port quick-change connector 6, and the X-port quick-change connector 7 all integrate a steel ball locking mechanism and an automatic sealing valve core.

[0040] In this embodiment, the valve body 2 of the above-mentioned structure is integrally milled from 7075-T6 high-strength aluminum alloy using a CNC machining center. Its dimensions are 99mm × 74mm × 35mm. The surface of the valve body 2 is anodized, with an oxide film thickness of 15-20μm to enhance corrosion resistance and wear resistance. The diameter of the five precision-machined oil passages inside the valve body 2 (first oil passage 2-6, second oil passage 2-7, third oil passage 2-8, fourth oil passage 2-9, and fifth oil passage 2-10) is preferably φ5mm to ensure smooth fluid flow and reduce pressure loss. The one-way valve threaded connection port 2-1 on the side of the valve body 2 connects to the third oil passage 2-8, fourth oil passage 2-9, and fifth oil passage 2-10. For ease of machining, each oil passage has a process plug hole at its end, which is sealed using a ball plug 3 during assembly.

[0041] The threaded connection port 2-1 of the one-way valve is located at the center of the side of the valve body 2, such as... Figure 5 As shown, the one-way valve threaded connection port 2-1 and the valve cavity it penetrates are combined into a 4-step bore with a φ12mm countersunk hole at the bottom. A standard thread is machined inside the bore. The effective length of the thread in the one-way valve threaded connection port 2-1 is 13mm. The second sealing O-ring 1-4 and the third O-ring 1-5 on the hydraulic control one-way valve 1 are connected via this thread. Figure 3 As shown, sealing cavities a2-5-1, b2-5-2, and x2-5-3 can be isolated respectively.

[0042] The threaded plug-in hydraulic control check valve 1 is a standard threaded cartridge valve, matched with the valve cavity 2-5 inside the valve body 2. The valve core opening pressure is 0.05MPa, the control ratio is 3:1, and the rated flow rate is 20L / min. During assembly, screw the threaded plug-in hydraulic control check valve 1 into the check valve threaded connection port 2-1, and tighten it to a torque of 45-50N·m.

[0043] The oil inlet / outlet 1-2 on the sealing cavity a2-5-1 of the threaded hydraulic check valve 1 is connected to the A threaded connection port 2-2 on the top surface of the valve body 2 through the first oil passage 2-6, the second oil passage 2-7, and the third oil passage 2-8 inside the valve body 2; the oil inlet / outlet 1-2 on the sealing cavity b2-5-2 of the threaded hydraulic check valve 1 is connected to the B threaded connection port 2-3 on the top surface of the valve body 2 through the fourth oil passage 2-9 inside the valve body 2; the oil inlet / outlet 1-2 on the sealing cavity x2-5-3 of the threaded hydraulic check valve 1 is connected to the X threaded connection port 2-4 on the top surface of the valve body 2 through the fifth oil passage 2-10 inside the valve body 2.

[0044] In this embodiment, a self-closing quick-connect coupling is used. The coupling has an external thread of G1 / 4, a rated pressure of 31.5 MPa, and a flow rate of 40 L / min. Before assembly, a 10×1.5 mm nitrile rubber O-ring is inserted into the sealing groove, and then the quick-connect coupling is screwed into the mounting hole with a tightening torque of 25 N·m.

[0045] The working process of the above structure is as follows: In the initial state of the experiment, when the electromagnetic directional valve is in the right position, quick connector 4 at port A is connected to the oil outlet of the electromagnetic directional valve, quick connector 5 at port B is connected to the oil cylinder inlet, and quick connector 6 at port X is connected to the control oil pipeline. When there is no control oil at quick connector 6 at port X, the hydraulic check valve 1 is in a one-way opening state, and the pressure oil flows freely from quick connector 4 at port A to quick connector 5 at port B, returning to the oil tank through quick connector 5, pressing the oil cylinder downward, while the connection between quick connector 5 at port B and quick connector 4 at port A is closed. When the electromagnetic directional valve is in the left position, control oil is introduced into quick connector 6 at port X, and the control piston in the hydraulic check valve 1 pushes open the check valve core, allowing the oil in quick connector 5 at port B to flow back to the oil tank at port A, thus moving the oil cylinder upward.

[0046] Application Example: In the "Hydraulic Locking Circuit" experiment, students only need to connect the A threaded connector 2-2 and B threaded connector 2-3 of this device to the two chambers of the hydraulic cylinder respectively via quick-connect couplings, and connect the X threaded connector 2-4 to the control oil circuit. The setup time is reduced from 8 minutes with traditional threaded connections to 1 minute, and zero leakage is achieved during class. After the experiment, the connection is easily disconnected, eliminating the need to clean any leaks, thus improving classroom experiment efficiency by 60%.

[0047] The embodiments of this utility model have been described in detail above, but the content described is only a preferred embodiment of this utility model and should not be considered as limiting the scope of implementation of this utility model. All equivalent changes and improvements made in accordance with the claims of this utility model should still fall within the patent coverage of this utility model.

Claims

1. A quick-change hydraulic control oneway valve for teaching purposes, characterized in that: The valve body includes a valve body and a threaded hydraulic control check valve. One side of the valve body has a check valve threaded connection port, and the valve body has an A threaded connection port, a B threaded connection port and an X threaded connection port. The valve body has a first oil passage, a second oil passage, a third oil passage, a fourth oil passage, a fifth oil passage, and a valve cavity adapted to the threaded plug-in hydraulic control check valve. The valve cavity is connected to the threaded connection port of the check valve, and the threaded plug-in hydraulic control check valve is threadedly connected to the threaded connection port of the check valve. The threaded hydraulic control check valve isolates the valve cavity into sealing cavity b, sealing cavity a, and sealing cavity x, respectively. The sealing cavity a, the sealing cavity b, and the sealing cavity x are distributed along the axial direction of the valve cavity from near the threaded connection port of the check valve towards the interior of the valve body. One end of the first oil passage is connected to the outside of the valve body, and the other end is connected to the second oil passage; one end of the second oil passage is connected to the outside of the valve body, and the other end is connected to the third oil passage; one end of the third oil passage is connected to the outside of the valve body, and the other end is connected to the sealing cavity a; one end of the fourth oil passage is connected to the outside of the valve body, and the other end is connected to the sealing cavity b; one end of the fifth oil passage is connected to the outside of the valve body, and the other end is connected to the sealing cavity x. The A threaded connection is connected to the first oil passage, the B threaded connection is connected to the fourth oil passage, and the X threaded connection is connected to the fifth oil passage. The A-threaded connection port is connected to an A-port quick-change connector, the B-threaded connection port is connected to a B-port quick-change connector, and the X-threaded connection port is connected to an X-port quick-change connector. A ball plug is provided at the end of the first oil passage, the second oil passage, the third oil passage, the fourth oil passage, and the fifth oil passage that is connected to the valve body.

2. The quick-change hydraulic control oneway valve for teaching purposes according to claim 1, characterized in that: A sealing ring is provided between the threaded plug hydraulic control check valve and the threaded connection port of the check valve.

3. The quick-change hydraulic control oneway valve for teaching purposes according to claim 1 or 2, characterized in that: The A-port quick-change connector, the B-port quick-change connector, and the X-port quick-change connector are all self-closing quick-change connectors.

4. The quick-change hydraulic control oneway valve for teaching purposes according to claim 3, characterized in that: The quick-change connectors A, B, and X all integrate a steel ball locking mechanism and an automatic sealing valve core.

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