Double-valve-clack stop valve for breaking hammer

Abstract

The utility model provides a double-valve-clack stop valve for a breaking hammer, and belongs to the technical field of stop valves. The problem that in the prior art, a stop valve is complex to disassemble and assemble is solved. The valve comprises a valve body, a double-valve-clack structure and a cylindrical pin, the whole valve body is in a rectangular body shape, a valve cavity is formed in the center of the valve body, the double-valve-clack structure is in an integrated long-strip shape, a valve clack head is arranged at one end of the double-valve-clack structure, the double-valve-clack structure is fixedly installed in the valve cavity, and the valve clack head is connected with the outer end of the valve body in a sealed mode. A first sealing groove is formed in the double-valve-clack structure, a first check ring and a first sealing ring are installed in the first sealing groove, a second sealing groove is formed in the inner wall of the valve cavity, and a second check ring and a second sealing ring are installed in the second sealing groove. The utility model has the advantages of simple assembly, accurate positioning and good sealing performance.

Description

Technical Field

[0001] This utility model belongs to the field of gate valve technology and relates to a double-disc gate valve for hydraulic breakers. Background Technology

[0002] The shut-off valve of the hydraulic breaker is a key component installed in the hydraulic system of the hydraulic breaker. It is used to control the flow of hydraulic oil, ensure the safety of the equipment during maintenance or shutdown, and regulate the working state of the hydraulic circuit.

[0003] Chinese patent publication number CN208169551U discloses a double-valve shut-off valve for a hydraulic breaker, comprising a valve body, a valve stem, a main valve disc, a valve cover, and an inlet chamber and an outlet chamber within the valve body. The valve cover is mounted on the valve body, and the valve stem passes through the valve cover, with its lower end extending into the valve body and connecting to the main valve disc. The main valve disc has a main valve disc cavity, and a pressure relief bottom hole and a pressure relief side hole are provided on the main valve disc. The valve disc has a bottom surface that communicates with the inner cavity of the main valve disc. The pressure relief side hole is located on the side wall of the main valve disc and communicates with the inner cavity of the main valve disc. The lower end of the valve stem passes through the inner cavity of the main valve disc, and an auxiliary valve disc is integrally connected to the lower end of the valve stem inside the inner cavity of the main valve disc. The auxiliary valve disc is directly integrally connected to the valve stem. A pressure cap that covers the top of the inner cavity of the main valve disc is fixedly installed on the main valve disc. The valve stem moves through the pressure cap. A step is provided between the auxiliary valve disc and the valve stem. The step abuts against the pressure cap when the valve stem rises.

[0004] The patent provides a dual-disc shut-off valve, but the assembly process requires disassembling the valve stem and gland to maintain the sealing rings of the main and auxiliary valve discs, which is complex. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the prior art by providing a dual-valve shut-off valve for hydraulic breakers.

[0006] The objective of this utility model can be achieved through the following technical solution: A double-valve shut-off valve for a hydraulic breaker, comprising a valve body, a double-valve structure, and a cylindrical pin. The valve body is generally rectangular with a valve cavity at its center. The double-valve structure is an integral elongated strip with one end configured as a valve head. The double-valve structure is fixedly installed inside the valve cavity, and the valve head is sealed to the outer end of the valve body. A first sealing groove is provided on the double-valve structure, in which a first retaining ring and a first sealing ring are installed. A second sealing groove is provided on the inner wall of the valve cavity, in which a second retaining ring and a second sealing ring are installed. An installation groove is provided near the end of the double-valve structure, in which a shaft elastic retaining ring is fixedly installed.

[0007] In the aforementioned dual-valve shut-off valve for a hydraulic breaker, the dual-valve structure has an upper sealing hole and a lower sealing hole, and the valve body is provided with an upper sealing element and a lower sealing element, which are respectively sealed and connected to the upper sealing hole and the lower sealing hole.

[0008] In the aforementioned double-disc shut-off valve for a hydraulic breaker, the valve disc head end is configured as a clamping ring, which is fitted and installed against the valve body end face, and a limit notch is provided in the clamping ring.

[0009] In the aforementioned double-valve shut-off valve for a hydraulic breaker, a mounting hole is provided in the valve body, a cylindrical pin is installed in the mounting hole and one end of the cylindrical pin extends out of the mounting hole, and the side end face of the limiting notch contacts the cylindrical pin.

[0010] Compared with the prior art, the dual-valve shut-off valve for hydraulic breakers provided by this utility model has the following beneficial effects: 1. The dual-valve structure adopts a long strip-shaped integrated design, reducing the number of parts, directly inserting into the valve body and valve cavity, and using cylindrical pins and limiting notches for quick positioning, shortening assembly time; 2. The cylindrical pin is embedded in the valve body mounting hole, making zero-gap contact with the limiting notches of the dual valves, ensuring high circumferential positioning accuracy, preventing valve core rotation or axial movement, and forming radial and axial double limiting with the fit of the clamping ring to the valve body end face, ensuring that the sealing surface of the dual valves is always precisely aligned with the valve body seat, maintaining the coaxiality of the sealing surface even under the high-frequency impact of the hydraulic breaker, avoiding sealing failure due to positioning deviation; 3. The upper sealing hole and lower sealing hole form a double sealing barrier with the upper sealing element and lower sealing element of the valve body, respectively, and with the first sealing ring and second sealing ring in the first sealing groove and second sealing groove, the sealing performance of this utility model is enhanced. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0012] Figure 2 This is a schematic diagram of the exploded structure of this utility model;

[0013] Figure 3 This is a cross-sectional structural diagram of the present invention.

[0014] In the diagram: 1. Valve body; 11. Valve cavity; 12. Second sealing groove; 13. Mounting hole; 2. Double valve disc structure; 21. Valve disc head; 22. First sealing groove; 23. Mounting groove; 24. Upper sealing hole; 25. Lower sealing hole; 26. Compression ring; 27. Limiting notch; 3. Cylindrical pin; 4. First retaining ring; 5. First sealing ring; 6. Second retaining ring; 7. Second sealing ring; 8. Shaft elastic retaining ring; 9. Upper seal; 10. Lower seal. Detailed Implementation

[0015] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0016] like Figures 1 to 3 As shown, this embodiment includes a valve body 1, a double valve disc structure 2, and a cylindrical pin 3. The valve body 1 is rectangular in shape and has a valve cavity 11 at its center. The double valve disc structure 2 is an integral elongated strip, with one end of the double valve disc structure 2 set as a valve disc head 21. The double valve disc structure 2 is fixedly installed inside the valve cavity 11. The inner end of the valve disc head 21 is set as a clamping ring 26, which is fitted to the end face of the valve body 1. A first sealing groove 22 is provided on the side of the double valve disc structure 2 near the valve disc head 21. A first retaining ring 4 and a first sealing ring 5 are installed in the first sealing groove 22. A second sealing groove 12 is provided on the side of the inner wall of the valve cavity 11 away from the valve disc head 21. A second retaining ring 6 and a second sealing ring 7 are installed in the second sealing groove 12. An installation groove 23 is provided near the end of the double valve disc structure 2. An elastic retaining ring 8 for shafts is fixedly installed in the installation groove 23.

[0017] Specifically, such as Figures 2 to 3 As shown, the first sealing ring 5 and the second sealing ring 7 are located on the inner side of the first sealing groove 22 and the second sealing groove 12, respectively. The first retaining ring 4 and the second retaining ring 6 are located on the outer side of the first sealing groove 22 and the second sealing groove 12, respectively. The first retaining ring 4 and the second retaining ring 6 fix the first sealing ring 5 and the second sealing ring 7 in the first sealing groove 22 and the second sealing groove 12, respectively.

[0018] like Figures 2 to 3 As shown, the double valve structure 2 has an upper sealing hole 24 and a lower sealing hole 25. The valve body 1 is provided with an upper sealing element 9 and a lower sealing element 10, which are respectively sealed to the upper sealing hole 24 and the lower sealing hole 25.

[0019] To elaborate further, such as Figures 1 to 3 As shown, a limiting notch 27 is provided in the clamping ring 26, and an installation hole 13 is provided in the valve body 1. The cylindrical pin 3 is installed in the installation hole 13 and one end of the cylindrical pin 3 extends out of the installation hole 13. The side end face of the limiting notch 27 contacts the cylindrical pin 3, so as to realize the rapid positioning of the double valve structure 2.

[0020] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0021] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A double-valve shut-off valve for a hydraulic breaker, comprising a valve body (1), a double-valve structure (2), and a cylindrical pin (3), wherein the valve body (1) is generally rectangular and has a valve cavity (11) at its center, characterized in that: The double valve structure (2) is an integral elongated strip and one end of the double valve structure (2) is set as a valve head (21). The double valve structure (2) is fixedly installed inside the valve cavity (11) and the valve head (21) is sealed to the outer end of the valve body (1). A first sealing groove (22) is provided on the double valve structure (2). A first retaining ring (4) and a first sealing ring (5) are installed in the first sealing groove (22). A second sealing groove (12) is provided on the inner wall of the valve cavity (11). A second retaining ring (6) and a second sealing ring (7) are installed in the second sealing groove (12). An installation groove (23) is provided near the end of the double valve structure (2). A shaft elastic retaining ring (8) is fixedly installed in the installation groove (23).

2. A dual-poppet shutoff valve for a breaking hammer as defined in claim 1, characterized in that: The double valve structure (2) has an upper sealing hole (24) and a lower sealing hole (25). The valve body (1) is provided with an upper sealing element (9) and a lower sealing element (10). The upper sealing element (9) and the lower sealing element (10) are respectively sealed and connected to the upper sealing hole (24) and the lower sealing hole (25).

3. A dual-poppet stop valve for a breaking hammer as defined in claim 1, characterized in that: The valve disc head (21) end is configured with a clamping ring (26), which is fitted to the end face of the valve body (1), and a limit notch (27) is provided in the clamping ring (26).

4. A dual-poppet stop valve for a breaking hammer as defined in claim 3, characterized in that: The valve body (1) has an installation hole (13), the cylindrical pin (3) is installed in the installation hole (13) and one end of the cylindrical pin (3) extends out of the installation hole (13), and the side end face of the limiting notch (27) is in contact with the cylindrical pin (3).

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