An explosion-proof valve with a self-locking protection mechanism oil cylinder

Abstract

The utility model discloses an explosion -proof valve with self -locking protection mechanism oil cylinder, including valve body, the inside of valve body is established with sealed chamber, push and extrude the chamber, install the chamber and the communicating chamber, the inside sealed chamber of valve body is equipped with the sealing head, the tail end fixed mounting of sealing head has the first spring, the center of sealing head is established with the trickle hole, and one end clamping installation of sealing head has the block, one side fixed connection of block has the second spring, the utility model discloses a sealing head can be closely with sealed chamber and fit, and the block is sealed to sealing head, and the pressure groove on sealing head is pushed and extruded through the auxiliary chamber, and the auxiliary hydraulic oil can push sealing head, and through the impact of hydraulic oil in the flowing process to the push -on plate, make the push -on plate can realize rotation, make the rotating push -on plate can increase the flow rate of hydraulic oil, improve the discharge capacity and speed of second connecting pipe to hydraulic oil, reduce the danger in the valve body.

Description

Technical Field

[0001] This utility model relates to hydraulic cylinders, specifically to explosion-proof valves, and to an explosion-proof valve for a hydraulic cylinder with a self-locking protection mechanism. Background Technology

[0002] Excavator hydraulic cylinder self-locking systems are divided into hydraulic self-locking and mechanical self-locking. Hydraulic self-locking involves installing a valve to maintain pressure, preventing the hydraulic oil in the cylinder from returning to the oil tank, and keeping the cylinder oil chamber filled with pressurized oil. However, this pressure-maintaining self-locking is not very safe and reliable; if there is a leak, the plunger will still slowly return to its original position.

[0003] A mechanical self-locking cylinder involves attaching a nut to the plunger of the hydraulic cylinder. When the cylinder rises to the desired position, the nut is rotated all the way down until it contacts the cylinder body, thus fixing the plunger at the required height. When pressure needs to be released, the nut is screwed back on to return the plunger to its original position. This type of cylinder has a specific name: a self-locking hydraulic cylinder.

[0004] An explosion-proof valve is a valve designed to prevent accidents caused by the rupture of hydraulic lines. With increasing safety awareness among the Chinese people, many hydraulic systems are now using these explosion-proof valves.

[0005] Explosion-proof valves differ fundamentally from traditional one-way throttle valves. When a hydraulic line suddenly ruptures, the explosion-proof valve connected to the inlet of the actuator (usually a hydraulic cylinder) will quickly shut off, preventing an accident. Explosion-proof valves are mainly used in the hydraulic systems of equipment without mechanical locking systems, such as large mechanical stages, lifts, elevators, and automotive inspection and repair beams, primarily serving a protective function to prevent safety accidents. They are a type of locking measure in hydraulic systems.

[0006] Existing explosion-proof valves are typically supported by springs during use. When the hydraulic oil increases in pressure, it pushes against the sealing head. However, when the hydraulic oil increases in pressure, the pressure is too high, which can easily cause the hydraulic oil delivery pipeline to rupture before the spring is fully compressed. Utility Model Content

[0007] One objective of this invention is to provide a new technology solution for an explosion-proof valve with a cylinder having a self-locking protection mechanism.

[0008] According to a first aspect of the present invention, an explosion-proof valve with a self-locking protection mechanism cylinder is provided, comprising a valve body, wherein a sealing cavity is provided inside the valve body, a pushing cavity is provided on one side of the sealing cavity, an installation cavity is provided on one side of the pushing cavity, and a communicating cavity is provided between the upper part of the installation cavity and the upper part of the sealing cavity.

[0009] The valve body has a sealing head inside the sealing cavity, and the sealing head and the sealing cavity are sealed together. A first spring is fixedly installed at the tail end of the sealing head. The first spring is located in the pushing cavity and the mounting cavity in sequence. One end of the first spring is fixedly connected to the inner wall of the mounting cavity. A fine flow hole is opened in the center of the sealing head. A blocking block is engaged at one end of the sealing head. A second spring is fixedly connected to one side of the blocking block. The second spring is located in the pushing cavity and the mounting cavity in sequence. One end of the second spring is fixedly connected to the inner wall of the mounting cavity.

[0010] Optionally, the sealing cavity is provided with two auxiliary cavities, and one end of the connecting cavity is connected to the auxiliary cavities on both sides through a connecting cavity.

[0011] Optionally, a pressure groove is provided on the outer side of the sealing head, the pressure groove is correspondingly provided with the auxiliary cavity, and one end of the sealing head is provided with an inclined surface adapted to the sealing cavity.

[0012] Optionally, one end of the sealing head is provided with a first mounting groove, one end of the first spring is fixedly connected to the inside of the first mounting groove, one end of the sealing block is provided with a second mounting groove, one end of the second spring is fixedly installed inside the second mounting groove, one end of the mounting cavity is fixedly provided with a positioning ring and a positioning post, the other end of the first spring is fixedly connected to the positioning ring, and the other end of the second spring is fixedly connected to the positioning post.

[0013] Optionally, a limiting cylinder is fixedly provided at one end of the sealing head, the second spring is movably located inside the limiting cylinder, the diameter of the sealing block is the same as the inner diameter of the limiting cylinder, and an overflow hole is provided on the limiting cylinder.

[0014] Optionally, an oil inlet chamber is provided on one side of the sealing cavity, a first connecting pipe is provided at one end of the valve body, the first connecting pipe is correspondingly arranged with the oil inlet chamber, a second connecting pipe is provided at the lower end of the sealing cavity, an oil outlet chamber is provided at the lower part of the pushing cavity, the second connecting pipe is correspondingly arranged with the oil outlet chamber, and a stepped ring is provided on both the first connecting pipe and the second connecting pipe.

[0015] Optionally, a shaft is fixedly installed inside the second connecting pipe, and a lever is movably installed on the shaft. The diameter of the lever is smaller than the inner diameter of the second connecting pipe.

[0016] Optionally, threaded mounting holes are provided at the four corners of the valve body.

[0017] According to one embodiment of this disclosure, the present invention uses a first spring to push the sealing head, so that the sealing head can fit tightly with the sealing cavity, thereby improving the sealing performance and preventing hydraulic oil leakage. The second spring pushes the sealing block, so that the sealing block can seal the sealing head. Furthermore, the setting of the second spring allows the sealing block to tightly seal the fine flow holes of the sealing head.

[0018] Furthermore, the design of the fine flow hole and the second spring facilitates the hydraulic oil to push open the sealing block under low pressure, allowing the hydraulic oil to flow into the interior of the connecting cavity through the overflow hole. The auxiliary cavity then pushes the pressure groove on the sealing head, and the auxiliary hydraulic oil can push the sealing head, enabling the sealing head to be pushed under lower hydraulic oil pressure, thus protecting the safety of the hydraulic oil pipeline.

[0019] Furthermore, the diameter of the second connecting pipe is smaller than that of the first connecting pipe, which can continuously maintain the internal pressure of the valve body. In order to increase the flow rate of hydraulic oil and reduce the internal danger of the valve body caused by maintaining the internal pressure, a deflector is installed inside the second connecting pipe via a shaft. The deflector is rotated by the impact of the hydraulic oil during its flow, which increases the flow rate of hydraulic oil, increases the discharge volume and speed of hydraulic oil from the second connecting pipe, and reduces the internal danger of the valve body.

[0020] Other features and advantages of the present invention will become clear from the following detailed description of exemplary embodiments of the present invention with reference to the accompanying drawings. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments of the present invention and, together with their description, serve to explain the principles of the present invention.

[0022] Figure 1 This is a schematic diagram of the overall structure of an explosion-proof valve with a self-locking protection mechanism cylinder in one embodiment;

[0023] Figure 2 This is a cross-sectional schematic diagram of an explosion-proof valve with a self-locking protection mechanism cylinder in one embodiment;

[0024] Figure 3 This is a schematic diagram of the front end of the internal structure of an explosion-proof valve with a self-locking protection mechanism cylinder in one embodiment;

[0025] Figure 4 This is a schematic diagram of the rear end of the internal structure of an explosion-proof valve with a self-locking protection mechanism cylinder in one embodiment.

[0026] Figure 5This is a cross-sectional schematic diagram of the internal structure of an explosion-proof valve with a self-locking protection mechanism cylinder in one embodiment;

[0027] Figure 6 This is a cross-sectional schematic diagram of the second connecting pipe of an explosion-proof valve with a self-locking protection mechanism cylinder in one embodiment.

[0028] The following are marked in the diagram: 1. Valve body; 2. First connecting pipe; 3. Second connecting pipe; 4. Oil inlet chamber; 5. Sealing chamber; 6. Pushing chamber; 7. Mounting chamber; 8. Connecting chamber; 9. Connecting chamber; 10. Auxiliary chamber; 11. Oil discharge chamber; 12. Sealing head; 13. Narrow flow hole; 14. Pressure groove; 15. Sealing block; 16. First mounting groove; 17. Second mounting groove; 18. Limiting cylinder; 19. Overflow hole; 20. First spring; 21. Second spring; 22. Positioning ring; 23. Positioning pin; 24. Inclined surface; 25. Shaft; 26. Paddle plate; 27. Stepped ring; 28. Threaded mounting hole. Detailed Implementation

[0029] Various exemplary embodiments of the present invention will now be described in detail with reference to the accompanying drawings. It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps set forth in these embodiments do not limit the scope of the present invention.

[0030] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the invention or its application or use.

[0031] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, such techniques, methods, and equipment should be considered part of the specification.

[0032] In all the examples shown and discussed herein, any specific values ​​should be interpreted as merely exemplary and not as limitations. Therefore, other examples of exemplary embodiments may have different values.

[0033] like Figure 1-6 As shown, an explosion-proof valve with a self-locking protection mechanism cylinder includes a valve body 1, a sealing cavity 5 is provided inside the valve body 1, a pushing cavity 6 is provided on one side of the sealing cavity 5, an installation cavity 7 is provided on one side of the pushing cavity 6, and a connecting cavity 8 is provided between the upper part of the installation cavity 7 and the upper part of the sealing cavity 5.

[0034] The valve body 1 has a sealing head 12 inside the sealing cavity 5. The sealing head 12 and the sealing cavity 5 are sealed together. A first spring 20 is fixedly installed at the tail end of the sealing head 12. The first spring 20 is located in the pushing cavity 6 and the mounting cavity 7 in sequence. One end of the first spring 20 is fixedly connected to the inner wall of the mounting cavity 7. A fine flow hole 13 is opened in the center of the sealing head 12. A blocking block 15 is engaged at one end of the sealing head 12. A second spring 21 is fixedly connected to one side of the blocking block 15. The second spring 21 is located in the pushing cavity 6 and the mounting cavity 7 in sequence. One end of the second spring 21 is fixedly connected to the inner wall of the mounting cavity 7.

[0035] In this embodiment, preferably, the sealing cavity 5 is provided with two auxiliary cavities 10, and one end of the connecting cavity 8 is connected to the auxiliary cavities 10 on both sides through the connecting cavity 9;

[0036] It should be noted that the connection cavity 9 is designed to facilitate the connection between the connecting cavity 8 and the auxiliary cavities 10 on both sides, so that the overflowing hydraulic oil can flow into the auxiliary cavity 10.

[0037] In this embodiment, preferably, a pressure groove 14 is provided on the outer side of the sealing head 12, the pressure groove 14 is correspondingly provided with the auxiliary cavity 10, and one end of the sealing head 12 is provided with an inclined surface 24 adapted to the sealing cavity 5.

[0038] It should be noted that a pressure groove 14 is provided on the sealing head 12, and the pressure groove 14 and the auxiliary cavity 10 are correspondingly set when the sealing head 12 is installed for sealing. This allows the overflowing hydraulic oil to push against the pressure groove 14, and the auxiliary hydraulic oil to push against the sealing head 12, so that the sealing head 12 can move by pushing.

[0039] In this embodiment, preferably, one end of the sealing head 12 is provided with a first mounting groove 16, one end of the first spring 20 is fixedly connected to the inside of the first mounting groove 16, one end of the sealing block 15 is provided with a second mounting groove 17, one end of the second spring 21 is fixedly installed inside the second mounting groove 17, one end of the mounting cavity 7 is fixedly provided with a positioning ring 22 and a positioning post 23, the other end of the first spring 20 is fixedly connected to the positioning ring 22, and the other end of the second spring 21 is fixedly connected to the positioning post 23;

[0040] It should be noted that the first mounting groove 16 and the positioning ring 22 facilitate the fixed installation of the first spring 20, maintaining the stability of the first spring 20 when subjected to compression and extension. Similarly, the second mounting groove 17 and the positioning post 23 facilitate the fixed installation of the second spring 21, maintaining the stability of the second spring 21 when subjected to compression and extension.

[0041] In this embodiment, preferably, a limiting cylinder 18 is fixedly provided at one end of the sealing head 12, the second spring 21 is movably located inside the limiting cylinder 18, the diameter of the sealing block 15 is the same as the inner diameter of the limiting cylinder 18, and an overflow hole 19 is provided on the limiting cylinder 18.

[0042] It should be noted that the limiting cylinder 18 is used to limit the second spring 21 and the sealing block 15, and the second spring 21 is located inside the first spring 20, which can limit the sealing block 15 and maintain the stability of the sealing block 15.

[0043] In this embodiment, preferably, an oil inlet chamber 4 is provided on one side of the sealing cavity 5, a first connecting pipe 2 is provided at one end of the valve body 1, the first connecting pipe 2 is correspondingly provided with the oil inlet chamber 4, a second connecting pipe 3 is provided at the lower end of the sealing cavity 5, an oil discharge chamber 11 is provided at the lower part of the pushing cavity 6, the second connecting pipe 3 is correspondingly provided with the oil discharge chamber 11, and a stepped ring 27 is provided on both the first connecting pipe 2 and the second connecting pipe 3.

[0044] It should be noted that the oil inlet chamber 4 facilitates the flow of hydraulic oil into the sealed chamber 5, and the first connecting pipe 2 facilitates the connection of the hydraulic oil pipeline. Similarly, the oil outlet chamber 11 facilitates communication with the pushing chamber 6, enabling the hydraulic oil to be discharged when the pressure increases. The second connecting pipe 3 connects to the hydraulic oil pipeline, facilitating the return of hydraulic oil. The stepped ring 27 facilitates the sealing installation of the hydraulic oil pipeline.

[0045] In this embodiment, preferably, a shaft 25 is fixedly installed inside the second connecting pipe 3, and a lever 26 is movably installed on the shaft 25. The diameter of the lever 26 is smaller than the inner diameter of the second connecting pipe 3.

[0046] It should be noted that the lever plate 26 is installed through the shaft 25, and the lever plate 26 can be rotated by the impact of hydraulic oil. The rotating lever plate 26 can also increase the discharge speed of hydraulic oil and reduce the danger caused by the pressure of hydraulic oil to the valve body 1.

[0047] In this embodiment, preferably, threaded mounting holes 28 are provided at the four corners of the valve body 1;

[0048] It should be noted that the threaded mounting holes 28 at the four corners of the valve body 1 are designed to facilitate the fixing and installation of the valve body 1 with bolts, thereby maintaining the stability of the valve body 1.

[0049] The specific operational procedures for this application are as follows:

[0050] When in use, first fix the valve body 1 with bolts and threaded mounting holes 28, and then connect it to the hydraulic oil return pipeline through the first connecting pipe 2 and the second connecting pipe 3 so that the hydraulic oil can form a return channel.

[0051] When the hydraulic oil pressure increases, it flows into the oil inlet chamber 4 through the first connecting pipe 2. At this time, the sealing head 12 is tightly fitted into the sealing chamber 5 to improve the sealing performance. Then, when the hydraulic oil pressure increases, it flows into the fine flow hole 13. When the hydraulic oil pressure increases, that is, when the hydraulic oil pressure is greater than the elastic force of the second spring 21, the hydraulic oil pushes the sealing block 15 open, allowing the sealing block 15 to enter the limiting cylinder 18. At this time, the hydraulic oil flows into the pushing chamber 6 and the mounting chamber 7 through the overflow hole 19, and then into the connecting chamber 8. Then, it flows into the auxiliary chamber 10 through the connecting chamber 9, allowing the overflowing hydraulic oil to enter the pressure groove 14. The hydraulic oil in the auxiliary oil inlet chamber 4 pushes the sealing head 12. That is, when the pressure of the hydraulic oil combined with the pushing force of the overflowing hydraulic oil on the pressure groove 14 is greater than the elastic force of the first spring 20, the sealing head 12 is pushed into the pushing chamber 6. Then, the hydraulic oil flows into the second connecting pipe 3 through the oil discharge chamber 11.

[0052] Furthermore, a lever 26 is installed inside the second connecting pipe 3 via a shaft 25. The flow of hydraulic oil impacts the lever 26, causing it to rotate. This rotation increases the flow rate of the hydraulic oil, thereby increasing the discharge volume and speed of the hydraulic oil from the second connecting pipe 3 and reducing the internal hazards of the valve body 1.

[0053] Although specific embodiments of the present invention have been described in detail by way of examples, those skilled in the art should understand that the above examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Those skilled in the art should understand that modifications can be made to the above embodiments without departing from the scope and spirit of the present invention. The scope of the present invention is defined by the appended claims.

Claims

1. An explosion-proof valve with a hydraulic cylinder having a self-locking protection mechanism, characterized in that: The valve body (1) includes a sealing cavity (5) inside the valve body (1), a pushing cavity (6) is provided on one side of the sealing cavity (5), an installation cavity (7) is provided on one side of the pushing cavity (6), and a connecting cavity (8) is provided between the upper part of the installation cavity (7) and the upper part of the sealing cavity (5). The valve body (1) is provided with a sealing head (12) inside the sealing cavity (5). The sealing head (12) and the sealing cavity (5) are sealed together. A first spring (20) is fixedly installed at the tail end of the sealing head (12). The first spring (20) is located in the pushing cavity (6) and the mounting cavity (7) in sequence. One end of the first spring (20) is fixedly connected to the inner wall of the mounting cavity (7). A fine flow hole (13) is opened in the center of the sealing head (12). A blocking block (15) is engaged at one end of the sealing head (12). A second spring (21) is fixedly connected to one side of the blocking block (15). The second spring (21) is located in the pushing cavity (6) and the mounting cavity (7) in sequence. One end of the second spring (21) is fixedly connected to the inner wall of the mounting cavity (7).

2. The explosion-proof valve with a self-locking protection mechanism cylinder according to claim 1, characterized in that: The sealing cavity (5) has two auxiliary cavities (10), and one end of the connecting cavity (8) is connected to the auxiliary cavities (10) on both sides through the connecting cavity (9).

3. The explosion-proof valve with a self-locking protection mechanism cylinder according to claim 2, characterized in that: The sealing head (12) has a pressure groove (14) on its outer side, and the pressure groove (14) is correspondingly provided with the auxiliary cavity (10). One end of the sealing head (12) is provided with an inclined surface (24) that is adapted to the sealing cavity (5).

4. The explosion-proof valve with a self-locking protection mechanism cylinder according to claim 1, characterized in that: One end of the sealing head (12) is provided with a first mounting groove (16), and one end of the first spring (20) is fixedly connected to the inside of the first mounting groove (16). One end of the sealing block (15) is provided with a second mounting groove (17), and one end of the second spring (21) is fixedly installed inside the second mounting groove (17). One end of the mounting cavity (7) is fixedly provided with a positioning ring (22) and a positioning post (23). The other end of the first spring (20) is fixedly connected to the positioning ring (22), and the other end of the second spring (21) is fixedly connected to the positioning post (23).

5. The explosion-proof valve with a self-locking protection mechanism cylinder according to claim 1, characterized in that: One end of the sealing head (12) is fixedly provided with a limiting cylinder (18), the second spring (21) is movably located inside the limiting cylinder (18), the diameter of the sealing block (15) is the same as the inner diameter of the limiting cylinder (18), and an overflow hole (19) is provided on the limiting cylinder (18).

6. The explosion-proof valve with a self-locking protection mechanism cylinder according to claim 1, characterized in that: The sealing cavity (5) has an oil inlet cavity (4) on one side, and the valve body (1) has a first connecting pipe (2) at one end. The first connecting pipe (2) is corresponding to the oil inlet cavity (4). The sealing cavity (5) has a second connecting pipe (3) at the lower end. The pushing cavity (6) has an oil discharge cavity (11) at the lower part. The second connecting pipe (3) is corresponding to the oil discharge cavity (11). The first connecting pipe (2) and the second connecting pipe (3) are both provided with stepped rings (27).

7. The explosion-proof valve with a self-locking protection mechanism cylinder according to claim 6, characterized in that: A shaft (25) is fixedly installed inside the second connecting pipe (3), and a lever (26) is movably installed on the shaft (25). The diameter of the lever (26) is smaller than the inner diameter of the second connecting pipe (3).

8. The explosion-proof valve with a self-locking protection mechanism cylinder according to claim 1, characterized in that: The valve body (1) has threaded mounting holes (28) at its four corners.

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