Anti-burst locking structure of high-pressure oil pipe of injection molding machine

Abstract

This application discloses an anti-explosion locking structure for high-pressure oil pipes in injection molding machines, relating to the field of injection molding machine safety protection technology. It includes an oil circuit board connected to the injection molding machine and several high-pressure oil pipes connected to the oil circuit board. The oil circuit board is equipped with oil pipe joints that are sealed to the high-pressure oil pipes. An anti-detachment chain is provided on the outer wall of each high-pressure oil pipe, connected to the oil pipe joint. Both ends of the anti-detachment chain are equipped with loops connected to the oil pipe joint and the outer wall of the high-pressure oil pipe. Adjacent high-pressure oil pipes are also connected by anti-detachment chains. The two ends of the anti-detachment chain are connected to the oil pipe joint and the outer wall of the high-pressure oil pipe respectively via loops. When a high-pressure oil pipe bursts due to oil pressure overload, joint seal failure, or pipe wall fatigue, the outward throwing tendency generated by the high-pressure oil impact is directly pulled and blocked by the anti-detachment chain, preventing the high-pressure oil pipe from springing open at high speed and preventing the thrown oil pipe from hitting the operator and causing personal injury.

Description

Technical Field

[0001] This application relates to the field of injection molding machine safety protection technology, and in particular to an anti-explosion locking structure for high-pressure oil pipes in injection molding machines. Background Technology

[0002] As the core equipment in plastic molding and processing, the hydraulic system of an injection molding machine provides power for key actions such as mold opening and closing and injection device movement. High-pressure oil pipes are the core components of the hydraulic system that transmit high-pressure oil, directly affecting the normal operating efficiency and stability of the injection molding machine. During operation, the hydraulic system needs to maintain high oil pressure, and the high-pressure oil pipes must withstand this pressure for extended periods, making them one of the most vulnerable and heavily loaded components in the hydraulic system.

[0003] Currently, most injection molding machines on the market connect and fix their high-pressure oil pipes to the hydraulic interfaces and actuators of the injection molding machine body through hydraulic connectors at both ends. The hydraulic connectors mainly serve to seal and transmit the oil. For some injection molding machines with slightly higher safety requirements, a simple plastic protective sleeve is wrapped around the outside of the high-pressure oil pipe.

[0004] Regarding the aforementioned technologies, the inventors believe that since the high-pressure oil pipes of injection molding machines are under high-pressure conditions for a long time, when the high-pressure oil pipes burst, the leaked high-pressure oil will generate a large impact force, pushing the high-pressure oil pipes out at high speed. The ejected high-pressure oil pipes are very likely to hit the operators, causing serious personal injury accidents. Utility Model Content

[0005] The purpose of this application is to provide an anti-explosion locking structure for high-pressure oil pipes in injection molding machines, in order to improve the problem that when a high-pressure oil pipe bursts, the leaking high-pressure oil will generate a large impact force, pushing the high-pressure oil pipe out at high speed. The ejected high-pressure oil pipe is very likely to hit the operator, causing serious personal injury accidents.

[0006] This application provides a burst-proof locking structure for high-pressure oil pipes in injection molding machines, employing the following technical solution: An anti-explosion locking structure for high-pressure oil pipes in an injection molding machine includes an oil circuit board connected to the injection molding machine and a plurality of high-pressure oil pipes connected to the oil circuit board. The oil circuit board is provided with an oil pipe joint that is sealed to the high-pressure oil pipes. An anti-detachment chain is provided on the outer wall of the high-pressure oil pipes and is connected to the oil pipe joint. Both ends of the anti-detachment chain are provided with a sling that is connected to the oil pipe joint and the outer wall of the high-pressure oil pipe. Adjacent high-pressure oil pipes are also connected by anti-detachment chains.

[0007] By adopting the above technical solution, the two ends of the anti-detachment chain are connected to the oil pipe joint and the outer wall of the high-pressure oil pipe respectively through the lasso. When the high-pressure oil pipe bursts due to oil pressure overload, joint seal failure, or pipe wall fatigue, the outward throwing tendency generated by the impact of high-pressure oil will be directly pulled and blocked by the anti-detachment chain, preventing the high-pressure oil pipe from springing open at high speed and preventing the thrown oil pipe from hitting the operator and causing personal injury, or hitting the precision parts of the injection molding machine and causing equipment failure, thus significantly improving the operational safety of the injection molding machine hydraulic system. Adjacent high-pressure oil pipes are additionally connected by anti-detachment chains, so that multiple high-pressure oil pipes form a mutually pulling and interconnected protective structure. Even if the impact force generated when a single oil pipe bursts will be transmitted and dispersed through the anti-detachment chains of adjacent oil pipes, preventing the anti-detachment chain from breaking due to excessive local stress after a single oil pipe bursts, further improving the reliability of protection.

[0008] Optionally, the anti-detachment chain is provided with fixing members at both ends corresponding to the sling. The fixing members are provided with limiting grooves corresponding to the sling. The outer side of the fixing members is provided with buckles that engage with the fixing members. The inner sidewall of the buckles abuts against the sling. The fixing members move along the wire harnesses at both ends of the sling toward the oil pipe joint and the sidewall of the high-pressure oil pipe to tighten the sling.

[0009] By adopting the above technical solution, the limiting groove on the fixing component can limit the wire harness at both ends of the sling. After the buckle is engaged, the inner wall is tightly abutted against the sling, which can effectively limit the radial movement of the sling and prevent the sling from loosening due to vibration or slight force. The fixing component can move along the wire harness at both ends of the sling toward the oil pipe joint and the side wall of the high-pressure oil pipe. During the movement, it can adaptively tighten the sling according to the actual distance between the high-pressure oil pipe and the oil pipe joint, which not only prevents the sling from being too loose and unable to be tightened in time when the pipe bursts, but also prevents the sling from being too tight and causing additional squeezing damage to the high-pressure oil pipe.

[0010] Optionally, the end of the fastener away from the anti-loosening chain is provided with a limiting protrusion that abuts against the buckle, and the buckle is provided with extending protrusions on both sides that contact the side of the fastener away from the sling.

[0011] By adopting the above technical solution, the limiting protrusion at the end of the fastener away from the anti-derailment chain can abut against the end of the buckle to form an axial limit, preventing the buckle from slipping off the fastener under long-term vibration or the impact of a burst pipe; the extending protrusions on both sides of the buckle allow the buckle to slide and engage along the length of the fastener and abut against the limiting protrusion, increasing the contact area between the buckle and the fastener, distributing the force on the buckle to the extending protrusions, and preventing the buckle from deforming due to excessive local force.

[0012] Optionally, a fixing screw is threadedly connected between the fastener and the buckle, and the fixing screw corresponds to the intersection of the wire harnesses at both ends of the sling.

[0013] By adopting the above technical solution, the fixing screws between the fastener and the buckle form a rigid connection, which can effectively resist the instantaneous impact force when the pipe bursts, prevent the buckle and the fastener from separating or relative displacement, and ensure that the sling is always in a tight state. When tightening the fixing screw, the pressure of the screw can be directly applied to the junction of the wire harness, tightening the fastener and the buckle, and preventing the fastener from moving along the sling wire harness.

[0014] Optionally, the inner sidewall of the limiting groove is provided with a separating protrusion for the wire harnesses at both ends of the separating loop along its length direction. The separating protrusion abuts against the buckle, and the fixing screw passes through the separating protrusion.

[0015] By adopting the above technical solution, the dividing protrusion in the limiting groove can separate the wire harnesses at both ends of the lasso, preventing them from tangling or squeezing each other during installation or tightening. The dividing protrusion abuts tightly against the inner wall of the buckle. In addition to the buckle itself tightening the lasso, the dividing protrusion can form a secondary tightening of the wire harnesses at both ends of the lasso from inside the limiting groove, further restricting the radial movement of the lasso and improving the connection stability between the lasso and the fastener. The fixing screw is set through the dividing protrusion. On the one hand, the dividing protrusion can form a radial positioning of the fixing screw, preventing the screw from shifting or loosening when under force.

[0016] Optionally, the overall length of the anti-detachment chain and sling is greater than the distance between the anti-detachment chain / sling and the connection point between the anti-detachment chain / sling and the outer wall of the high-pressure oil pipe and the oil pipe joint.

[0017] By adopting the above technical solution, since the length of the anti-detachment chain and the lasso is greater than the distance between the outer wall of the high-pressure oil pipe and the oil pipe joint, the anti-detachment chain and the lasso are in a slightly slack state when the injection molding machine is working normally. This will not restrict the length change of the high-pressure oil pipe caused by thermal expansion and contraction or the small displacement caused by the vibration of the hydraulic system, thus preventing fatigue damage to the pipe wall caused by long-term tension and ensuring the normal service life of the high-pressure oil pipe. When the high-pressure oil pipe bursts, the high-pressure oil pushes the oil pipe outward. At this time, the reserved length of the anti-detachment chain and the lasso can be quickly straightened, forming effective traction before the oil pipe displacement reaches the dangerous range.

[0018] Optionally, the sling is provided with a rubber pad layer along the direction of the wire harness that contacts the side wall of the high-pressure oil pipe and the oil pipe joint, and the rubber pad layer is arranged in an arc shape corresponding to the outer side wall of the high-pressure oil pipe and the oil pipe joint.

[0019] By adopting the above technical solution, the rubber pad layer directly contacts the side wall of the high-pressure oil pipe and the pipe joint, which can prevent the sling from directly rubbing and squeezing the pipe wall, prevent the sling from damaging the pipe wall after long-term use, or cause wear on the pipe wall surface due to vibration, protect the structural integrity of the high-pressure oil pipe and the joint, and extend its service life.

[0020] Optionally, the rubber pad layer is provided with a fastening groove near the wire harness position of the sling to engage with the wire harness.

[0021] By adopting the above technical solution, the fastening groove and the cable harness of the sling are fastened together, which can accurately position the cable harness and ensure that the sling is always in the preset fixed position. The fastening groove makes the sling and the rubber pad layer form a tight connection, preventing the rubber pad layer from separating from the sling when vibrating or when the sling is tightened, and ensuring that the rubber pad layer always adheres to the pipe wall and continuously plays a protective and buffering role.

[0022] In summary, this application includes at least one of the following beneficial technical effects: 1. The anti-detachment chain connects the oil pipe joint to the outer wall of the high-pressure oil pipe through a sling. When the high-pressure oil pipe bursts due to oil pressure overload, joint seal failure or pipe wall fatigue, the outward throwing tendency generated by the impact of high-pressure oil will be directly pulled and blocked by the anti-detachment chain to prevent the high-pressure oil pipe from springing open at high speed and to prevent the thrown oil pipe from hitting the operator and causing personal injury. 2. The limiting groove on the fastener can limit the wire harness at both ends of the sling. After the buckle is engaged, the inner wall is tightly abutted against the sling, which can effectively limit the radial movement of the sling and prevent the sling from loosening due to vibration or slight force. The fastener can move along the wire harness at both ends of the sling toward the oil pipe joint and the side wall of the high-pressure oil pipe. During the movement, it can adaptively tighten the sling according to the actual distance between the high-pressure oil pipe and the oil pipe joint. This prevents the sling from being too loose and unable to tighten in time when the pipe bursts, and also prevents the sling from being too tight and causing additional squeezing damage to the high-pressure oil pipe. 3. The fastening groove engages with the cable harness, which can accurately position the cable harness and ensure that the cable is always in the preset fixed position. The fastening groove makes the cable and the rubber pad layer tightly connected, preventing the rubber pad layer from separating from the cable when vibrating or tightening the cable, ensuring that the rubber pad layer always adheres to the pipe wall and continuously plays a protective and buffering role. Attached Figure Description

[0023] Figure 1 This is an overall schematic diagram of a high-pressure oil pipe anti-explosion locking structure for an injection molding machine. Figure 2 yes Figure 1 A magnified view of part A in the middle.

[0024] In the diagram, 1 is the oil circuit board; 11 is the oil pipe joint; 2 is the high-pressure oil pipe; 3 is the anti-derailment chain; 31 is the lasso; 32 is the fastener; 321 is the limiting groove; 322 is the limiting protrusion; 323 is the separating protrusion; 33 is the buckle; 331 is the extension protrusion; 34 is the fixing screw; 35 is the rubber pad; and 351 is the snap-fit ​​groove. Detailed Implementation

[0025] The following is in conjunction with the appendix Figure 1 -Appendix Figure 2This application will be described in further detail below.

[0026] A burst-proof locking structure for high-pressure oil pipes in injection molding machines, referring to... Figure 1 The system includes an oil circuit board 1 connected to the injection molding machine body. The oil circuit board 1 integrates several oil pipe joints 11 for connecting high-pressure oil pipes 2. The oil pipe joints 11 and the high-pressure oil pipes 2 are sealed with a sealing ring to prevent oil leakage during normal operation. An anti-detachment chain 3 is connected between the outer wall of the high-pressure oil pipe 2 and the oil pipe joint 11. Both ends of the anti-detachment chain 3 are equipped with a lasso 31. The lasso 31 is made of high-strength flexible metal wire harness and can fit tightly against the outer wall of the high-pressure oil pipe 2 and the outer wall of the oil pipe joint 11.

[0027] Reference Figure 1 and Figure 2 The anti-detachment chain 3 is also fixed with metal fasteners 32 at both ends. The fasteners 32 are provided with limiting grooves 321 corresponding to the lasso 31. The inner sidewall of the limiting groove 321 is provided with a separating protrusion 323 along the length direction, which separates the wire harnesses at both ends of the lasso 31. The fasteners 32 are fastened with buckles 33 on the outside. The inner sidewall of the buckles 33 is tightly abutted against the lasso 31. The buckles 33 have extending protrusions 331 on both sides that contact the side of the fasteners 32 away from the lasso 31. The end of the fasteners 32 away from the anti-detachment chain 3 is provided with a limiting protrusion 322 that abuts against the buckles 33 to prevent the buckles 33 from falling off. The fasteners 32 can move along the wire harnesses at both ends of the lasso 31 toward the sidewall of the oil pipe joint 11 and the high-pressure oil pipe 2. During the movement, the fasteners 32 can adaptively tighten the lasso 31 according to the actual distance between the high-pressure oil pipe 2 and the oil pipe joint 11.

[0028] Reference Figure 1 and Figure 2 A fixing screw 34 is threadedly connected between the fixing member 32 and the buckle 33. The fixing screw 34 passes through the dividing protrusion 323 and corresponds to the intersection of the wire harnesses at both ends of the lasso 31. When the fixing screw 34 is tightened, the lasso 31 can be tightened at the intersection, and the connection between the fixing member 32 and the buckle 33 is further reinforced. A rubber pad 35 is attached to the lasso 31 along the direction of the wire harness. The rubber pad 35 is arc-shaped, corresponding to the outer wall of the high-pressure oil pipe 2 and the oil pipe joint 11. The side of the rubber pad 35 closest to the lasso 31 has a fastening groove 351 that engages with the wire harness. The wire harness of the lasso 31 is embedded in the fastening groove 351 to achieve a tight connection with the rubber pad 35.

[0029] Reference Figure 1 and Figure 2Adjacent high-pressure oil pipes 2 are also connected by the aforementioned anti-detachment chain 3. That is, the outer walls of adjacent high-pressure oil pipes 2 form a mutually pulling structure through components such as the anti-detachment chain 3, the lasso 31, the fixing element 32, and the buckle 33. Furthermore, the overall length of the anti-detachment chain 3 and the lasso 31 is greater than the distance between them and the outer wall of the high-pressure oil pipe 2 and the connection point of the oil pipe joint 11, ensuring that the anti-detachment chain 3 and the lasso 31 are in a slightly slack state during normal operation of the injection molding machine, without affecting the normal displacement of the high-pressure oil pipe 2.

[0030] The implementation principle of this application embodiment is as follows: When the injection molding machine is working normally, the hydraulic system delivers high-pressure oil to the high-pressure oil pipe 2 through the oil circuit board 1 and the oil pipe joint 11. At this time, the anti-detachment chain 3 and the lasso 31 are in a slightly loose state because their overall length is greater than the distance between the connection points. They will not restrict the length change of the high-pressure oil pipe 2 caused by thermal expansion and contraction or the slight displacement caused by vibration. When the high-pressure oil pipe 2 bursts due to oil pressure overload, pipe wall fatigue or joint seal failure, the high-pressure oil leaks instantly and generates an outward impact force, pushing the high-pressure oil pipe 2 outward. At this time, the originally loose anti-detachment chain 3 and the lasso 31 are quickly straightened. The lasso 31 forms a pulling limit on the high-pressure oil pipe 2, preventing the high-pressure oil pipe 2 from continuing to pop out and avoiding it from hitting personnel or equipment.

[0031] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Identical components are represented by the same reference numerals. Therefore, all equivalent changes made to the structure, shape, and principle of this application should be covered within the scope of protection of this application.

Claims

1. A burst-proof locking structure for high-pressure oil pipes in injection molding machines, characterized in that: It includes an oil circuit board (1) connected to an injection molding machine and several high-pressure oil pipes (2) connected to the oil circuit board (1). The oil circuit board (1) is provided with an oil pipe joint (11) that is sealed to the high-pressure oil pipes (2). The outer wall of the high-pressure oil pipes (2) is provided with an anti-detachment chain (3) that is connected to the oil pipe joint (11). Both ends of the anti-detachment chain (3) are provided with a sling (31) that is connected to the oil pipe joint (11) and the outer wall of the high-pressure oil pipes (2). Adjacent high-pressure oil pipes (2) are also connected by the anti-detachment chain (3).

2. The anti-explosion locking structure for high-pressure oil pipes in injection molding machines according to claim 1, characterized in that: The anti-detachment chain (3) is provided with a fixing member (32) corresponding to the sling (31) at both ends. The fixing member (32) is provided with a limiting groove (321) corresponding to the sling (31). The fixing member (32) is provided with a buckle (33) that engages with the fixing member (32) on the outside. The inner side wall of the buckle (33) abuts against the sling (31). The fixing member (32) moves along the wire harness at both ends of the sling (31) toward the side wall of the oil pipe joint (11) and the high pressure oil pipe (2) to tighten the sling (31).

3. The anti-explosion locking structure for high-pressure oil pipes in injection molding machines according to claim 2, characterized in that: The end of the fastener (32) away from the anti-detachment chain (3) is provided with a limiting protrusion (322) that abuts against the buckle (33), and the buckle (33) has extension protrusions (331) extending on both sides that contact the side of the fastener (32) away from the lasso (31).

4. The anti-explosion locking structure for high-pressure oil pipes in injection molding machines according to claim 3, characterized in that: The fixing member (32) and the buckle (33) are threaded together by a fixing screw (34), and the fixing screw (34) corresponds to the intersection of the wire harnesses at both ends of the sling (31).

5. The anti-explosion locking structure for high-pressure oil pipes in injection molding machines according to claim 4, characterized in that: The inner sidewall of the limiting groove (321) is provided with a separating protrusion (323) for the wire harnesses at both ends of the separating loop (31) along its length direction. The separating protrusion (323) abuts against the buckle (33) and the fixing screw (34) passes through the separating protrusion (323).

6. The anti-explosion locking structure for high-pressure oil pipes in injection molding machines according to claim 5, characterized in that: The overall length of the anti-detachment chain (3) and the lasso (31) is greater than the distance between the anti-detachment chain (3), the lasso (31) and the connection between the outer wall of the high-pressure oil pipe (2) and the oil pipe joint (11).

7. The anti-explosion locking structure for high-pressure oil pipes in injection molding machines according to claim 6, characterized in that: The sling (31) is provided with a rubber pad (35) along the direction of the wire harness, which is in contact with the side wall of the high-pressure oil pipe (2) and the oil pipe joint (11). The rubber pad (35) is arranged in an arc shape corresponding to the outer side wall of the high-pressure oil pipe (2) and the oil pipe joint (11).

8. The anti-explosion locking structure for high-pressure oil pipes in injection molding machines according to claim 7, characterized in that: The rubber pad (35) is provided with a fastening groove (351) that engages with the wire harness near the position of the sling (31).

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