Quartering hammer reversing valve, quartering hammer middle cylinder body and hydraulic quartering hammer

Abstract

The utility model provides a breaking hammer reversing valve, a breaking hammer middle cylinder body and a hydraulic breaking hammer, and relates to the field of hydraulic breaking hammers, the breaking hammer reversing valve comprises a valve body, a sliding valve cavity is arranged in the valve body, a valve core is assembled in the valve body, and a first shallow groove is formed in a valve body sealing assembly face where the valve body and the breaking hammer middle cylinder body are assembled in a sealing mode, the first shallow groove avoids a valve body oil port formed in the valve body. When the breaking hammer reversing valve and the breaking hammer middle cylinder body are assembled in a sealed mode, the first shallow groove forms an avoiding cavity on the periphery of the valve body oil port. The breaking hammer reversing valve or the breaking hammer middle cylinder body is grooved, a certain gap can be formed between sealing assembly faces during assembly, the effect of creeping of the breaking hammer reversing valve and the breaking hammer middle cylinder body on sealing grease is relieved, diffusion of the sealing grease between the sealing assembly faces is slowed down, carbonization precipitation in the sealing assembly faces is reduced, and the service life of the breaking hammer reversing valve or the breaking hammer middle cylinder body is prolonged. The sealing effect is ensured, hydraulic oil is prevented from overflowing, and the equipment response precision is ensured.

Description

Technical Field

[0001] This utility model belongs to the field of hydraulic breakers, specifically relating to a breaker reversing valve, a breaker cylinder body, and a hydraulic breaker. Background Technology

[0002] Hydraulic breakers are key pieces of equipment in mining, demolition, and other fields. They break hard objects by converting hydraulic energy into high-frequency impact force from a piston. During operation, they experience dual vibrations: the vibration of the mechanical components themselves and the impact generated by periodic pressure fluctuations in the hydraulic system. The valve body and cylinder, as core precision-fitting components, are typically sealed using both a sealing ring and the metal mating surface. Current assembly processes require applying sealing grease to the sealing ring, inserting it into the sealing groove on the bottom of the valve body, and then tightening the valve body and cylinder together.

[0003] The existing technology has the following technical problems: High-frequency hydraulic fluctuations continuously impact the sealing unit, causing some sealing grease to creep and seep out from the sealing interface, intruding into the gap between the valve body and cylinder assembly surfaces. During hydraulic breaker operation, the valve body and cylinder assembly surfaces reciprocate with hydraulic pressure changes, repeatedly crushing residual grease. After the hydraulic system heats up, the temperature of the valve body and cylinder assembly surfaces also increases significantly. Under high temperature, high pressure, and mechanical crushing, the organic macromolecules in the grease carbonize, especially around the high-pressure channels where the hydraulic fluctuation amplitude is greater and the creeping phenomenon is more intense, making carbonization more likely. The carbonized layer forms an irregular isolation layer on the assembly surface, disrupting the tight fit between metal surfaces. Carbonization accumulation around the high-pressure channels exacerbates seal failure, leading to hydraulic oil leakage. Furthermore, carbonized particles intrude into the precision fitting gaps with the hydraulic oil, easily causing delayed response and jamming of the breaker's reversing valve, and in severe cases, causing abnormal system pressure fluctuations. Utility Model Content

[0004] The present invention aims to provide a breaker reversing valve, a breaker cylinder, and a hydraulic breaker to solve the above-mentioned technical problems.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is as follows: a reversing valve for a hydraulic breaker is provided, including a valve body, a spool valve chamber is provided inside the valve body and a valve core is assembled thereon, and a first shallow groove is provided on the valve body sealing assembly surface where the valve body is sealed to the cylinder body of the hydraulic breaker, wherein the first shallow groove avoids the valve body oil port opened on the valve body.

[0006] When the breaker reversing valve is sealed and assembled with the cylinder body of the breaker, the first shallow groove forms a clearance cavity on the outer periphery of the valve body oil port.

[0007] In one embodiment, a first shallow groove is formed on the valve body sealing assembly surface, and a plurality of valve body oil ports are disposed in the first shallow groove.

[0008] In one embodiment, the first shallow groove is provided with a plurality of protrusions adapted to abut against the cylinder of the breaker hammer, the protrusions being distributed at intervals between the plurality of valve body oil ports.

[0009] In one embodiment, a plurality of first shallow grooves are formed on the valve body sealing assembly surface, and the plurality of first shallow grooves surround the plurality of valve body oil ports, forming an annular clearance cavity at the valve body oil ports.

[0010] In one embodiment, a sealing groove suitable for accommodating a sealing ring is formed on the end face of the valve body oil port to form a seal with the cylinder body of the breaker hammer.

[0011] In one embodiment, a dustproof groove suitable for installing a dustproof sealing ring is provided on the outer peripheral surface of the valve body sealing assembly surface.

[0012] On the other hand, the present invention provides a cylinder body for a hydraulic breaker, wherein the cylinder body is provided with a cylinder body sealing assembly surface suitable for sealing and assembling a hydraulic breaker reversing valve, and a second shallow groove is also provided on the cylinder body sealing assembly surface, wherein the second shallow groove avoids the cylinder body oil port opened on the cylinder body of the hydraulic breaker.

[0013] When the cylinder body of the breaker is assembled with the breaker reversing valve, the second shallow groove forms a clearance cavity on the outer periphery of the oil port of the cylinder body.

[0014] In one embodiment, a sealing groove suitable for accommodating a sealing ring is formed on the end face of the cylinder oil port.

[0015] In one embodiment, the second shallow groove is provided with a plurality of protrusions adapted to abut against the breaker directional valve, the protrusions being distributed at intervals between the plurality of cylinder oil ports.

[0016] On the other hand, this utility model provides a hydraulic breaker, including a sealed-assembly breaker cylinder body and a breaker reversing valve, wherein the cylinder oil port on the breaker cylinder body corresponds to and is sealed with the valve body oil port on the breaker reversing valve; wherein...

[0017] The sealing assembly surface of the hydraulic breaker reversing valve is provided with a first shallow groove, which avoids the valve body oil port provided on the valve body.

[0018] And / or a second shallow groove is provided on the sealing assembly surface of the cylinder body in the breaker hammer, the second shallow groove being provided in correspondence with the first shallow groove;

[0019] After the cylinder body and the directional valve of the breaker are assembled, a clearance cavity is formed between the outer periphery of the sealed cylinder body oil port and the valve body oil port and the groove wall of the shallow groove.

[0020] The beneficial effects of this utility model are as follows:

[0021] A slotted design is made on the directional valve or cylinder body of the hydraulic breaker. During assembly, a certain gap can be formed on the outer periphery of the oil port on the sealing assembly surface. This reduces the effect of the creep of the directional valve and cylinder body on the sealing grease, slows down the diffusion of the sealing grease between the sealing assembly surfaces, reduces carbonization and precipitation in the sealing assembly surfaces, ensures sealing effect, prevents hydraulic oil overflow, and ensures equipment response accuracy. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the reversing valve for the hydraulic breaker of this utility model;

[0023] Figure 2 This is a schematic diagram of the cylinder body in the hydraulic breaker of this utility model.

[0024] Explanation of reference numerals in the attached figures:

[0025] 01-Valve body; 02-First shallow groove; 03-Valve body oil port; 04-Sealing groove; 05-Protrusion; 06-Dustproof groove; 07-Assembly hole; 08-Cylinder oil port; 09-Second shallow groove. Detailed Implementation

[0026] To make the technical problems, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the present utility model.

[0027] It should be noted that when a component is referred to as being "fixed to" or "set on" another component, it can be directly on or indirectly on that other component. When a component is referred to as being "connected to" another component, it can be directly connected to or indirectly connected to that other component.

[0028] It should be understood that the terms "length", "width", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They 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. Therefore, they should not be construed as limitations on the present invention.

[0029] 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 indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0030] A hydraulic breaker is an engineering device that uses a hydraulic system to drive a piston for high-frequency impact operations. It is mainly composed of high-strength metal components and sealing assemblies. During operation, it generates two typical vibrations: vibration from the mechanical movement of the equipment itself, and periodic pressure fluctuations in the hydraulic system caused by the breaking action. This equipment can convert hydraulic energy into powerful mechanical impact force, making it suitable for construction operations such as rock breaking and concrete demolition. It is widely used in mining, construction, and other fields. During the assembly phase, operators typically apply a large amount of sealing grease to the sealing rings and place them into the sealing groove at the bottom of the valve body. The valve body is then tightened onto the cylinder of the breaker. This operation inevitably causes some grease to be squeezed into the gap between the valve body and the cylinder's mating surfaces. Once the equipment is in operation, as the breaker continues to operate, the internal hydraulic oil pressure constantly changes, causing the mating surfaces of the valve body and cylinder to reciprocate and continuously crush the remaining grease, allowing it to diffuse between the mating surfaces. Meanwhile, as the hydraulic system temperature gradually rises, the organic components in the grease begin to carbonize under the combined effects of high temperature, high pressure, and mechanical crushing. Black carbonized deposits appear on the assembly surfaces, especially near the high-pressure channels where creep is greater, making carbonization more likely. This carbonized deposit not only affects the equipment's sealing performance but also its precision, leading to abnormal equipment operation.

[0031] To solve the above-mentioned technical problems, this utility model provides a hydraulic breaker reversing valve, a hydraulic breaker cylinder body, and a hydraulic breaker. A grooved design is made in the hydraulic breaker reversing valve or the hydraulic breaker cylinder body to create a gap between the reversing valve and the cylinder body during assembly, thus avoiding the impact of creep on the assembly surface on the diffusion and carbonization of the sealing grease. Please refer to the appendix. Figure 1 The present invention provides a breaker reversing valve, which includes a valve body 01. The valve body 01 has a spool valve chamber and a valve core. A first shallow groove 02 is formed on the sealing surface of the valve body 01, which is sealed to the cylinder body of the breaker. The first shallow groove 02 avoids the valve body oil port 03 located on the valve body 01. When the breaker reversing valve is sealed to the cylinder body of the breaker, the valve body oil port 03 can be sealed to the cylinder oil port 08 on the cylinder body. The first shallow groove 02 forms a clearance cavity around the valve body oil port 03 to reduce the impact of surface creep on the sealing grease.

[0032] In this embodiment, the first shallow groove 02 can form a clearance cavity between the assembly surfaces. After the sealing grease overflows, it enters the clearance cavity, which can alleviate the impact of the creep of the assembly surfaces on the sealing grease, prevent the sealing grease from spreading over a wide area between the assembly surfaces and causing a large amount of carbonization and precipitation, avoid carbonization and precipitation from affecting the oil port sealing effect, reduce hydraulic oil overflow, avoid affecting the response accuracy of the breaker directional valve, ensure normal operation of the equipment and extend its service life.

[0033] Specifically, the valve body 01 has mounting holes 07 on both sides. During assembly, the breaker directional valve is fixed to the breaker cylinder body with bolts. To ensure a secure assembly between the breaker directional valve and the breaker cylinder body, the first shallow groove 02 avoids the mounting holes 07. During assembly, the end face of the mounting hole 07 of the breaker directional valve can abut against the end face of the mounting hole 07 of the breaker cylinder body, ensuring that the breaker directional valve can be securely installed on the breaker cylinder body.

[0034] In one alternative embodiment, please refer to the appendix. Figure 1 A first shallow groove 02 is opened on the sealing assembly surface of the valve body 01, and multiple valve body oil ports 03 are all located in the first shallow groove 02.

[0035] Furthermore, the assembly hole 07 and valve body oil port 03 of the breaker reversing valve are both located in the first shallow groove 02. When the breaker reversing valve is assembled with the breaker cylinder body, only the end face of the assembly hole 07, the end face of the valve body oil port 03, and the outer peripheral surface of the valve body 01 sealing assembly surface abut against the breaker cylinder body. The remaining positions are all clearance cavities formed by the first shallow groove 02.

[0036] Furthermore, the first shallow groove 02 is provided with multiple protrusions 05 suitable for abutting against the cylinder body of the hydraulic breaker. These protrusions 05 are distributed at intervals between the multiple valve body ports 03. When the hydraulic breaker directional valve is assembled with the hydraulic breaker cylinder body, the protrusions 05 abut against the sealing surfaces of the directional valve and the hydraulic breaker cylinder body to distribute the force. Specifically, the protrusions 05 are circular and evenly distributed at intervals between the valve body ports 03.

[0037] In another optional embodiment, a plurality of first shallow grooves 02 are formed on the sealing assembly surface of the valve body 01, and the plurality of first shallow grooves 02 surround a plurality of valve body oil ports 03 respectively, forming an annular clearance cavity in the valve body oil ports 03.

[0038] In one embodiment, a sealing groove 04 suitable for accommodating a sealing ring is formed on the end face of the valve body oil port 03 to form a seal with the cylinder body of the breaker hammer.

[0039] In one embodiment, please refer to the appendix. Figure 1 The outer circumferential surface of the valve body 01 sealing assembly surface is provided with a dustproof groove 06 suitable for installing a dustproof sealing ring, which prevents external dust and debris from entering the gap between the breaker reversing valve and the cylinder body of the breaker, and prevents hard particles from causing wear on the sealing assembly surface.

[0040] On the other hand, this utility model provides a cylinder body for a hydraulic breaker; please refer to the appendix. Figure 2 The cylinder body of the hydraulic breaker is provided with a cylinder body sealing surface suitable for sealing and assembling the hydraulic breaker reversing valve. A second shallow groove 09 is also provided on the cylinder body sealing surface, wherein the second shallow groove 09 avoids the cylinder body oil port 08 located on the cylinder body of the hydraulic breaker. When the hydraulic breaker cylinder body is assembled with the hydraulic breaker reversing valve, the cylinder body oil port 08 and the valve body oil port 03 are sealed together. The second shallow groove 09 forms a clearance cavity on the outer periphery of the cylinder body oil port 08 to reduce the impact of surface creep on the sealing grease.

[0041] In this embodiment, the second shallow groove 09 forms a clearance cavity between the breaker reversing valve and the breaker cylinder body, preventing the sealing grease from spreading widely due to the creep of the sealing assembly surface, aggravating the carbonization of the sealing grease, reducing its impact on sealing performance, avoiding problems such as hydraulic oil leakage and component jamming caused by this, thereby extending the service life of the equipment.

[0042] Specifically, the cylinder body of the hydraulic breaker has mounting holes 07 on both sides for mounting the hydraulic breaker reversing valve. To ensure that the hydraulic breaker reversing valve is firmly mounted to the hydraulic breaker cylinder body, the second shallow groove 09 avoids the mounting holes 07. During assembly, the end face of the mounting hole 07 of the hydraulic breaker cylinder body can abut against the end face of the mounting hole 07 of the hydraulic breaker reversing valve to ensure that the hydraulic breaker cylinder body and the hydraulic breaker reversing valve are firmly mounted.

[0043] In one optional embodiment, a second shallow groove 09 is formed on the cylinder block sealing assembly surface, and multiple cylinder block oil ports 08 are all disposed within the second shallow groove 09.

[0044] Furthermore, the assembly hole 07 and the oil port 08 of the cylinder body in the breaker are both located in the second shallow groove 09. When the cylinder body of the breaker is assembled with the breaker reversing valve, only the end face of the assembly hole 07, the end face of the oil port 08, and the outer peripheral surface of the cylinder sealing assembly surface abut against the breaker reversing valve. The remaining positions are all clearance cavities formed by the second shallow groove 09.

[0045] Furthermore, the second shallow groove 09 is provided with multiple protrusions 05 suitable for abutting against the breaker's reversing valve. These protrusions 05 are distributed at intervals between the multiple cylinder oil ports 08. When the breaker's cylinder body is assembled with the breaker's reversing valve, the protrusions 05 abut against the sealing surfaces of the breaker's reversing valve and the breaker's cylinder body to distribute the force. Specifically, the protrusions 05 are circular and evenly distributed at intervals between the cylinder oil ports 08.

[0046] In another optional embodiment, a plurality of second shallow grooves 09 are formed on the cylinder block sealing assembly surface, and the plurality of second shallow grooves 09 surround a plurality of cylinder block oil ports 08, forming an annular clearance cavity in the cylinder block oil ports 08.

[0047] In one embodiment, a sealing groove 04 suitable for accommodating a sealing ring is formed on the end face of the cylinder oil port 08 to form a seal with the valve body 01.

[0048] On the other hand, this utility model provides a hydraulic breaker, including a sealed breaker directional valve and a breaker cylinder body. The cylinder oil port 08 on the breaker cylinder body corresponds to and seals with the valve body oil port 03 on the breaker directional valve. The breaker directional valve includes a valve body 01, which has a spool chamber and a valve core. The valve body 01 has a valve body 01 sealing surface. The breaker cylinder body has a cylinder sealing surface that seals with the valve body 01 sealing surface.

[0049] In one optional embodiment, a first shallow groove 02 is formed only on the sealing surface of the valve body 01. The first shallow groove 02 avoids the valve body oil port 03 formed on the valve body 01. A sealing groove 04 suitable for accommodating a sealing ring is formed on the end face of the valve body oil port 03. Correspondingly, the cylinder oil port 08 of the breaker's cylinder body is directly formed on the cylinder body sealing surface. During assembly, the end face of the valve body oil port 03 abuts against the cylinder body sealing surface of the breaker's cylinder body, so that the valve body oil port 03 and the cylinder body oil port 08 are sealed and connected. The first shallow groove 02 forms a clearance cavity on the outer periphery of the valve body oil port 03.

[0050] Furthermore, multiple protrusions 05 are provided in the first shallow groove 02. The protrusions 05 abut against the cylinder sealing assembly surface to distribute the force. The specific arrangement of the protrusions 05 can be referred to the aforementioned embodiment, and will not be repeated here.

[0051] In another optional embodiment, a second shallow groove 09 is formed only on the cylinder block sealing assembly surface. The second shallow groove 09 avoids the cylinder block oil port 08 formed on the cylinder block of the hydraulic breaker. A sealing groove 04 suitable for accommodating a sealing ring is formed on the end face of the cylinder block oil port 08. Correspondingly, the valve body oil port 03 is directly formed on the valve body 01 sealing assembly surface. During assembly, the end face of the cylinder block oil port 08 abuts against the valve body 01 sealing assembly surface of the hydraulic breaker reversing valve, so that the cylinder block oil port 08 and the valve body oil port 03 are sealed and connected. The second shallow groove 09 forms a clearance cavity on the outer periphery of the cylinder block oil port 08.

[0052] Furthermore, multiple protrusions 05 are provided in the second shallow groove 09. The protrusions 05 abut against the sealing surface of the valve body 01 to distribute the force. The specific arrangement of the protrusions 05 can be referred to the aforementioned embodiment, and will not be repeated here.

[0053] In another optional embodiment, a first shallow groove 02 and a second shallow groove 09 are respectively formed on the sealing assembly surface of the valve body 01 and the sealing assembly surface of the cylinder block, with the first shallow groove 02 and the second shallow groove 09 correspondingly provided. The first shallow groove 02 and the second shallow groove 09 respectively avoid the valve body oil port 03 and the cylinder block oil port 08, and a sealing groove 04 suitable for accommodating the sealing ring is formed on the end face of the valve body oil port 03 or the cylinder block oil port 08. During assembly, the end faces of the valve body oil port 03 and the cylinder block oil port 08 abut against each other to ensure a sealed connection between the valve body oil port 03 and the cylinder block oil port 08, and the first shallow groove 02 and the second shallow groove 09 are closed together, forming an avoidance cavity between the outer periphery of the sealed cylinder block oil port 08 and the valve body oil port 03 and the groove wall of the shallow groove.

[0054] Furthermore, multiple protrusions 05 are respectively provided in the first shallow groove 02 and the second shallow groove 09. When the breaker reversing valve is assembled with the cylinder body of the breaker, the protrusions 05 in the first shallow groove 02 and the second shallow groove 09 correspond one-to-one and abut against each other to distribute the force. The specific arrangement of the protrusions 05 can be referred to the aforementioned embodiment, and will not be repeated here.

[0055] In the above embodiment, mounting holes 07 for mounting bolts are provided on both sides of the breaker reversing valve and the breaker cylinder body. The breaker reversing valve is mounted on the breaker cylinder body by bolts. The first shallow groove 02 and the second shallow groove 09 avoid the mounting holes 07 on the breaker reversing valve and the breaker cylinder body. During assembly, the end faces of the mounting holes 07 on the breaker reversing valve and the breaker cylinder body abut against each other to ensure that the breaker reversing valve is firmly fixed to the breaker cylinder body.

[0056] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A break hammer reversing valve comprising a valve body having a spool cavity therein and a spool fitted therein, characterized by, A first shallow groove is provided on the valve body sealing assembly surface where the valve body is sealed to the cylinder body of the breaker hammer. The first shallow groove avoids the valve body oil port opened on the valve body. When the breaker reversing valve is sealed and assembled with the cylinder body of the breaker, the first shallow groove forms a clearance cavity on the outer periphery of the valve body oil port.

2. The breaking hammer reversing valve of claim 1, wherein A first shallow groove is formed on the sealing assembly surface of the valve body, and multiple valve body oil ports are all located in the first shallow groove.

3. The breaking hammer reversing valve of claim 2, wherein The first shallow groove is provided with a plurality of protrusions suitable for abutting against the cylinder body of the breaker hammer, and the protrusions are distributed at the intervals of the plurality of valve body oil ports.

4. The breaker reversing valve as described in claim 1, characterized in that, Multiple first shallow grooves are formed on the sealing assembly surface of the valve body, and the multiple first shallow grooves surround the multiple valve body oil ports respectively, forming an annular clearance cavity at the valve body oil ports.

5. The breaking hammer reversing valve of claim 1, wherein A sealing groove suitable for accommodating a sealing ring is provided on the end face of the valve body oil port to form a seal with the cylinder of the breaker hammer.

6. The breaking hammer reversing valve of claim 1, wherein A dustproof groove suitable for installing a dustproof sealing ring is provided on the outer circumferential surface of the valve body sealing assembly surface.

7. A breaking hammer intermediate cylinder provided with a cylinder sealing mounting face adapted to sealingly mount a breaking hammer reversing valve, characterized in that A second shallow groove is also provided on the cylinder sealing assembly surface, wherein the second shallow groove avoids the cylinder oil port opened on the cylinder of the breaker hammer. When the cylinder body of the breaker is assembled with the breaker reversing valve, the second shallow groove forms a clearance cavity on the outer periphery of the oil port of the cylinder body.

8. A breaking hammer intermediate cylinder as claimed in claim 7, characterised in that, A sealing groove suitable for accommodating the sealing ring is opened on the end face of the oil port of the cylinder.

9. The breaking hammer intermediate cylinder as defined in claim 7 wherein, The second shallow groove is provided with a plurality of protrusions suitable for contacting the breaker reversing valve, the protrusions being distributed at intervals between the plurality of cylinder oil ports.

10. A hydraulic breaking hammer, characterized in that, The system includes a sealed assembly of a hydraulic breaker cylinder body and a hydraulic breaker reversing valve, wherein the cylinder oil port on the hydraulic breaker cylinder body corresponds to and is sealed with the valve body oil port on the hydraulic breaker reversing valve; wherein... The sealing assembly surface of the hydraulic breaker reversing valve is provided with a first shallow groove, which avoids the valve body oil port provided on the valve body. And / or a second shallow groove is provided on the sealing assembly surface of the cylinder body in the breaker hammer, the second shallow groove being provided in correspondence with the first shallow groove; After the cylinder body and the directional valve of the breaker are assembled, a clearance cavity is formed between the outer periphery of the sealed cylinder body oil port and the valve body oil port and the groove wall of the shallow groove.

Images