A hydraulic breaker core designed to prevent mud and water backflow.
The combination of an umbrella-shaped protective cover, a water-blocking shoulder, and a waterproof ring plate solves the problem of mud and water backflow in the hydraulic breaker, thereby improving the stability and reliability of the equipment and reducing maintenance costs.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- YANTAI AIDI PRECISION MASCH CO LTD
- Filing Date
- 2025-06-09
- Publication Date
- 2026-07-03
AI Technical Summary
In existing hydraulic breakers, the problem of mud and water backflow leads to wear, rust, and equipment failure, affecting equipment reliability and construction efficiency. Furthermore, existing sealing solutions are either ineffective or costly and difficult to maintain under vibration and impact.
The system employs a combination of an umbrella-shaped protective cover, a water-blocking shoulder, and a waterproof ring plate. The umbrella-shaped protective cover alters the flow path of mud and water, while the water-blocking shoulder and waterproof ring plate prevent mud and water from entering, forming a triple protection system to prevent mud and water backflow.
It effectively prevents mud and water from entering the equipment, extends the life of parts, reduces wear and noise, improves equipment stability and reliability, and reduces maintenance costs.
Smart Images
Figure CN224451761U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to a hydraulic breaker core that prevents mud and water backflow, belonging to the technical field of hydraulic breakers. Background Technology
[0002] In underground operations such as tunnel engineering, hydraulic breakers use a chisel to deliver high-frequency impacts to hard objects such as rocks and concrete to achieve breaking operations.
[0003] However, during actual tunnel operations, when the crushing operation generates strong impact forces, water and mud from the surrounding environment will inevitably be knocked down. This mud and water will rapidly flow back into the hammer body through the gap between the drill rod and the hammer. Once the mud and water enter the hammer body, the impurities and moisture in the mud and water will accelerate the wear and rust of the components, reducing their service life. Furthermore, the presence of mud and water may affect the normal fit and movement between components, leading to increased operating resistance, reduced efficiency, and even direct equipment failure, rendering the equipment unable to function properly. This not only increases equipment maintenance costs and downtime, reducing construction efficiency, but may also adversely affect the progress and quality of the entire tunnel project.
[0004] Currently, while some technical solutions exist on the market that attempt to address this problem, most of these solutions have shortcomings. Some solutions achieve backflow prevention by adding a simple rubber sealing ring at the connection between the drill rod and the hammer body; however, under the intense vibration and impact forces generated during crushing operations, the rubber sealing ring is prone to wear and aging, leading to a rapid decline in sealing effectiveness and an inability to effectively prevent mud and water backflow in the long term. Other solutions employ complex mechanical structures for sealing, but these structures not only increase the manufacturing cost and weight of the equipment, but also, due to the complexity and uncertainty of the tunnel operating environment, these complex mechanical structures are prone to failure during actual use, resulting in high maintenance difficulty and further affecting the reliability and practicality of the equipment. Utility Model Content
[0005] The purpose of this utility model is to provide a new technical solution to improve or solve the technical problems existing in the prior art as described above.
[0006] The technical solution provided by this utility model is as follows: A hydraulic breaker core for preventing backflow of mud and water includes a housing, a chisel, a bushing, and a protective cover. The housing has a front opening, and the bushing is fixedly installed at the front opening. The chisel includes a working end and an assembly end. The assembly end of the chisel is slidably inserted into and installed in the bushing. The protective cover is umbrella-shaped, with a through hole at the top. The protective cover is sleeved on the chisel through the through hole and is located near the assembly end of the chisel. The protective cover can move synchronously with the chisel along the axial direction.
[0007] Compared with the prior art, the technical solution provided by this utility model has the following beneficial effects: By setting an umbrella-shaped protective cover on the drill rod, when mud and water flow down the surface of the drill rod, the umbrella-shaped protective cover can change the flow path of the mud and water, forcing the mud and water to deviate radially outward and preventing the mud and water from entering the interior of the shell; and the protective cover can move synchronously with the drill rod along the axial direction, that is, there is no relative movement between the protective cover and the drill rod, which can reduce the wear caused by relative friction of the protective cover and extend the service life of the protective cover.
[0008] Based on the above technical solution, the present invention can be further improved as follows.
[0009] Furthermore, the protective cover is made of an elastic material.
[0010] The beneficial effects of adopting the above-mentioned further solution are that the protective cover made of elastic material has good flexibility and resilience. During the high-frequency impact vibration of the drill rod, it can adapt to the small deformation and vibration of the drill rod, always closely fit the drill rod, ensure the protective effect, and at the same time reduce the noise and wear caused by vibration, and improve the stability and reliability of equipment operation.
[0011] Furthermore, the protective cover is made of rubber or nylon.
[0012] The beneficial effects of adopting the above-mentioned further solutions are that the rubber material has excellent sealing, elasticity and wear resistance, which can effectively prevent mud and water from penetrating, and can still maintain good performance in harsh environments; the nylon material has high strength, light weight and chemical corrosion resistance, and can adapt to different working conditions. Both materials can provide reliable performance guarantee for the protective cover and ensure its long-term effective operation.
[0013] Furthermore, the protective cover and the drill rod are fixed together by an interference fit.
[0014] The advantages of adopting the above-mentioned further solution are that the interference fit fixing method is simple and reliable, requiring no additional fasteners. It can ensure a tight connection between the protective cover and the drill rod, enabling synchronous movement, and can effectively prevent mud and water from seeping in from the connection between the two. At the same time, it is easy to install, disassemble and maintain, reducing maintenance costs and time.
[0015] Furthermore, the bushing includes a sleeve and a waterproof ring plate, the sleeve being fitted inside the front opening of the housing, and the waterproof ring plate being in contact with the end face of the front opening of the housing.
[0016] The beneficial effect of adopting the above-mentioned further solution is that the waterproof ring plate is placed on the end face where the sleeve and the shell mate, which can prevent mud and water from entering the interior of the shell from between the sleeve and the shell, thus improving the sealing effect.
[0017] Furthermore, the sleeve is fixed to the front opening of the housing by an interference fit.
[0018] The advantages of adopting the above-mentioned further solution are that the interference fit fixing method can make the sleeve and the front opening of the shell tightly connected without gaps, which can prevent mud and water from seeping into the shell through the connection between the two. At the same time, this fixing method is simple and easy to implement, has low cost, and can withstand greater impact force, ensuring the stability of the equipment during the crushing operation.
[0019] Furthermore, the drill rod is also provided with a water-blocking shoulder, which is located inside the protective cover.
[0020] The beneficial effect of adopting the above-mentioned further solution is that when mud and water flow down the surface of the drill rod, the water-blocking shoulder can force the mud and water to deviate radially outward, which can prevent the mud and water flowing down the surface of the drill rod from further penetrating into the shell along the drill rod. Together with the protective cover, it forms a double protection, which improves the effect of preventing mud and water backflow. At the same time, the setting of the water-blocking shoulder will not affect the normal operation of the drill rod, ensuring the crushing efficiency of the breaker. Attached Figure Description
[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the provided drawings without creative effort.
[0022] Figure 1 This is a three-dimensional structural diagram of the hydraulic breaker of this utility model;
[0023] Figure 2 This is a three-dimensional structural diagram of the hydraulic breaker of this utility model without the protective cover installed.
[0024] Figure 3 For the present utility model Figure 2 A partial sectional view;
[0025] Figure 4 This is a three-dimensional structural diagram of the protective cover of this utility model;
[0026] Figure 5 For the present utility model Figure 4 A sectional view;
[0027] Figure 6 This is a three-dimensional structural diagram of the bushing of this utility model;
[0028] Figure 7 This is a front view of the bushing of this utility model.
[0029] In the diagram, 100 is the housing; 200 is the drill rod; 201 is the water-blocking shoulder; 300 is the bushing; 301 is the sleeve; 302 is the waterproof ring plate; 400 is the protective cover; and 401 is the through hole. Detailed Implementation
[0030] The serial numbers assigned to components in this document, such as "first" and "second," are used only to distinguish the objects described and do not imply any priority in order or any specific technical meaning. Furthermore, the concepts of "connection" and "linkage" mentioned in this application, unless otherwise specified, are considered to include both direct connection (linkage) and indirect connection (linkage).
[0031] When interpreting the description of this application, it should be clarified that terms such as "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," indicating directions or positional relationships, are based on the perspective and layout shown in the accompanying drawings. They are intended to facilitate explanation and simplify the description process, and are not absolute limitations on the actual location, construction method, or operating mode of the described device or element. Therefore, these terms should not be construed as restrictive interpretations of the content of this application.
[0032] The principles and features of this utility model are described below with reference to examples. The examples are only used to explain this utility model and are not intended to limit the scope of this utility model.
[0033] like Figures 1-7 As shown, a hydraulic breaker core for preventing mud and water backflow includes a housing 100, a chisel 200, a bushing 300, and a protective cover 400. The housing 100 has a front opening, and the bushing 300 is fixedly installed at the front opening. The bushing 300 is a guiding element that provides precise guidance for the chisel 200 during movement, ensuring that the chisel 200 moves along a predetermined trajectory. The chisel 200 includes a working end and an assembly end. The assembly end of the chisel 200 is slidably inserted into and installed in the bushing 300. The protective cover 400 is umbrella-shaped, and a through hole 401 is opened at the top of the protective cover 400. The protective cover 400 is sleeved on the chisel 200 through the through hole 401 and is located near the assembly end of the chisel 200. The protective cover 400 can move synchronously with the chisel 200 along the axial direction.
[0034] The protective cover 400 is made of elastic material, preferably rubber or nylon. The elastic material provides excellent flexibility and resilience, allowing it to adapt to the minute deformations and vibrations of the drill rod 200 during high-frequency impact vibrations, maintaining a tight fit to ensure effective protection. This also reduces noise and wear caused by vibration, improving the stability and reliability of the equipment. Rubber offers excellent sealing, elasticity, and wear resistance, effectively preventing mud and water penetration and maintaining good performance even in harsh environments. Nylon is high-strength, lightweight, and chemically resistant, adapting to various working conditions. Both materials provide reliable performance for the protective cover 400, ensuring its long-term effective operation.
[0035] The protective cover 400 and the drill rod 200 are fixed by an interference fit. The interference fit fixing method is simple and reliable, and does not require additional fasteners. It can ensure that the protective cover 400 and the drill rod 200 are tightly connected and move synchronously, and can effectively prevent mud and water from seeping in from the connection between the two. At the same time, it is easy to install, disassemble and maintain, reducing maintenance costs and time.
[0036] The bushing 300 includes a sleeve 301 and a waterproof ring plate 302. The sleeve 301 is fitted into the front opening of the housing 100, and the waterproof ring plate 302 is connected to the end of the sleeve 301, fitting snugly against the end face of the front opening of the housing 100. The waterproof ring plate 302, positioned on the mating end face of the sleeve 301 and the housing 100, prevents mud and water from entering the interior of the housing 100 from between the sleeve 301 and the housing 100, thus improving the sealing effect.
[0037] The sleeve 301 is fixed to the front opening of the housing 100 by an interference fit. The interference fit fixation method can make the sleeve 301 and the front opening of the housing 100 tightly connected without gaps, which can prevent mud and water from seeping into the interior of the housing 100 through the connection between the two. At the same time, this fixing method is simple and easy to implement, has low cost, and can withstand greater impact force, ensuring the stability of the equipment during the crushing operation.
[0038] The drill rod 200 is also provided with a water-blocking shoulder 201. The water-blocking shoulder 201 is located in the internal space of the protective cover 400. When mud and water flow down the surface of the drill rod 200, the water-blocking shoulder 201 can force the mud and water to deviate radially outward, which can prevent the mud and water flowing down the surface of the drill rod 200 from further penetrating into the housing 100. Together with the protective cover 400, it forms a double protection, which improves the effect of preventing mud and water backflow. At the same time, the setting of the water-blocking shoulder 201 will not affect the normal operation of the drill rod 200, ensuring the crushing efficiency of the breaker.
[0039] The method for preventing mud and water backflow in the hydraulic breaker of this utility model is as follows:
[0040] When the hydraulic breaker is working, and mud and water flow down the surface of the chisel 200, the umbrella-shaped protective cover 400 will first play a protective role. Its umbrella-shaped structure can change the flow path of the mud and water and prevent the mud and water from continuing to flow down the chisel 200.
[0041] If, under extreme working conditions, a small amount of mud and water continues to flow down the drill rod 200 through the protective cover 400, the water-blocking shoulder 201 located in the inner space of the protective cover 400 forms a secondary protection. The water-blocking shoulder 201 can force the mud and water to deviate radially outward, which can prevent the mud and water flowing down the surface of the drill rod 200 from further penetrating into the shell 100 along the drill rod 200.
[0042] When a small amount of mud and sand flows downwards over the water-blocking shoulder 201, the waterproof ring plate 302 is positioned on the end face where the sleeve 301 and the housing 100 meet, which can prevent mud and water from entering the interior of the housing 100 from between the sleeve 301 and the housing 100.
[0043] This utility model, through the triple protection provided by the protective cover 400, the water-blocking shoulder 201, and the waterproof ring plate 302, can effectively prevent mud and water from flowing back into the interior of the breaker housing 100, and protect the internal components of the housing 100 from corrosion and damage.
[0044] 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, improvements, etc., 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 mud-water backflow preventing breaker hammer core, characterized by, The device includes a housing (100), a drill rod (200), a bushing (300), and a protective cover (400). The housing (100) has a front opening, and the bushing (300) is fixedly installed at the front opening. The drill rod (200) includes a working end and an assembly end. The assembly end of the drill rod (200) is inserted into and installed in the bushing (300) in a manner that allows it to slide axially. The protective cover (400) is umbrella-shaped, and a through hole (401) is opened at the top of the protective cover (400). The protective cover (400) is sleeved on the drill rod (200) through the through hole (401) and is located near the assembly end of the drill rod (200). The protective cover (400) can move synchronously along the axial direction with the drill rod (200).
2. A shatter hammer core that prevents water from seeping in, according to claim 1, characterized in that, The protective cover (400) is made of elastic material.
3. A shatter hammer core that prevents backflow of mud water according to claim 2, characterized in that, The protective cover (400) is made of rubber or nylon.
4. A mud-water backflow preventing breaking hammer core according to claim 3, characterized in that, The protective cover (400) and the drill rod (200) are fixed by an interference fit.
5. The hydraulic breaker core for preventing mud and water backflow according to any one of claims 1-4, characterized in that, The bushing (300) includes a sleeve (301) and a waterproof ring plate (302). The sleeve (301) is fitted into the front opening of the housing (100), and the waterproof ring plate (302) is in contact with the end face of the front opening of the housing (100).
6. A shatter hammer core that prevents backflow of mud water according to claim 5, characterized in that, The sleeve (301) is fixed to the front opening of the housing (100) by an interference fit.
7. The anti-water-inversion hammer core according to any one of claims 1 to 3, characterized in that, The drill rod (200) is also provided with a water-blocking shoulder (201), which is located inside the protective cover (400).