Explosion-proof valve group for hydraulic pipeline

Abstract

The utility model belongs to the technical field of hydraulic control, and relates to a hydraulic pipeline anti-explosion valve bank which comprises a valve block, an oil rod ascending unit and an oil cylinder descending unit, the oil rod ascending unit and the oil cylinder descending unit are arranged in the valve block, the oil rod ascending unit comprises a first one-way valve, a first anti-explosion valve, an oil port E and an oil port F, and a first right-angle flow channel is formed between the oil port E and the oil port F; a first anti-explosion valve is installed in the first right-angle flow channel, a first buffering flow channel is connected to the first right-angle flow channel in parallel, and a first one-way valve is installed in the first buffering flow channel. The oil cylinder descending unit comprises a second one-way valve, a second anti-explosion valve, an oil port M and an oil port N, a second right-angle flow channel is formed between the oil port M and the oil port N, a second anti-explosion valve is installed in the second right-angle flow channel, a second buffering flow channel is connected to the second right-angle flow channel in parallel, and a second one-way valve is installed in the second buffering flow channel. According to the anti-explosion valve, the problem that the anti-explosion valve is impacted by large flow generated at the moment of action of the executing mechanism is effectively solved, and the service life of the anti-explosion valve is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic control and relates to an explosion-proof valve, in particular to an explosion-proof valve group for hydraulic pipelines. Background Art

[0002] As an important engineering equipment in port machinery, stacker-reclaimer plays an important role in port transportation. The cantilever pitching action of stacker and reclaimer is controlled by hydraulic system, which is an important link in production operation. In case of sudden leakage and rupture of the connecting pipeline between the actuator cylinder and the power station in the hydraulic system, the hydraulic cylinder will stall and the actuator will lose control and fall, threatening the safety of equipment and personnel.

[0003] As an important hydraulic component in the cantilever pitch hydraulic system, the explosion-proof valve can effectively prevent accidents caused by uncontrolled pressure relief in the cantilever mechanism. Frequent misoperations in actual use may cause wear or damage to the valve core. Since the explosion-proof valve is installed in the internal channel of the valve block, it is difficult to detect even if it is damaged, which will cause pollution to the entire hydraulic system and bring major safety risks to the stability of the entire machine. Utility Model Content

[0004] The utility model aims to provide a hydraulic pipeline explosion-proof valve group which has a scientific and reasonable structural design, can effectively reduce the impact of the large flow generated by the actuator action on the explosion-proof valve, increase the service life of the explosion-proof valve, and is easy to implement.

[0005] The utility model solves the technical problem through the following technical solutions:

[0006] A hydraulic pipeline explosion-proof valve group, characterized in that it includes a valve block and an oil rod raising unit and an oil cylinder lowering unit arranged in parallel in the valve block, the oil rod raising unit includes a first non-return valve, a first explosion-proof valve, an E oil port and an F oil port, the E oil port and the F oil port are respectively arranged on two adjacent valve block walls of the valve block, a first right-angle flow channel is formed between the E oil port and the F oil port, a first explosion-proof valve is installed in the first right-angle flow channel, a first buffer flow channel connected in parallel with the first right-angle flow channel is arranged in the valve block, and a first non-return valve is installed in the first buffer flow channel;

[0007] The cylinder lowering unit includes a second one-way valve, a second explosion-proof valve, an M oil port and an N oil port. The M oil port and the N oil port are respectively arranged directly below the E oil port and the F oil port. A second right-angle flow channel is formed between the M oil port and the N oil port. A second explosion-proof valve is installed in the second right-angle flow channel. A second buffer flow channel connected in parallel with the second right-angle flow channel is provided in the valve block, and a second one-way valve is installed in the second buffer flow channel.

[0008] Moreover, the first explosion-proof valve and the second explosion-proof valve both include a valve body, a hexagon socket screw, a valve core baffle, a spring and a locking nut. A valve body is arranged in the first right-angle flow channel and the second right-angle flow channel. A buffer through hole is opened in the middle of the valve body, and a concentric locking nut is fixedly installed on the outer side of the buffer through hole. The hexagon socket screw is inserted from the inner side of the buffer through hole and threadedly connected to the locking nut. A spring is installed on the rod of the hexagon socket screw, and a valve core baffle is arranged at the lower part of the nut of the buffer screw.

[0009] Moreover, the buffer screw and the valve core baffle are split structures that are mutually fitted.

[0010] The advantages and beneficial effects of the utility model are:

[0011] 1. This hydraulic pipeline explosion-proof valve group, by connecting the first buffer flow channel and the second buffer flow channel in parallel to the first right-angle flow channel and the second right-angle flow channel respectively, that is, by connecting a check valve in parallel to the explosion-proof valve of each unit, when oil enters the oil port E or the oil port M, the flow through the explosion-proof valve can be instantly relieved, and the pressure difference at both ends of the explosion-proof valve is reduced, thereby reducing the impact force on the locking nut on the explosion-proof valve, thereby protecting the explosion-proof valve.

[0012] 2. This hydraulic pipeline explosion-proof valve group optimizes the design of the flow channel in the valve group and adds a buffer flow channel, so that the system can relieve the impact on the explosion-proof valve when oil enters the oil port F and the oil port M, thereby protecting the explosion-proof valve.

[0013] 3. The utility model is scientifically and reasonably designed, and has the advantages of being able to effectively reduce the impact of the large flow generated by the actuator's action on the explosion-proof valve, increasing the service life of the explosion-proof valve, and being easy to implement. It is a hydraulic pipeline explosion-proof valve group with high innovation. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a structural schematic diagram of the utility model;

[0015] Figure 2 is a perspective view of the utility model;

[0016] Figure 3 It is a schematic diagram of the structure of the first explosion-proof valve or the second explosion-proof valve of the utility model;

[0017] Figure 4 This is a schematic diagram of the utility model connected in a system.

[0018] Reference numerals

[0019] 1-valve block, 2-E oil port, 3-F oil port, 4-M oil port, 5-N oil port, 6-first one-way valve, 7-second one-way valve, 8-first explosion-proof valve, 9-second explosion-proof valve, 10-valve core baffle, 11-hexagon socket screw, 12-spring, 13-locking nut, 14-valve body, 15-explosion-proof valve group, 16-directional control valve. DETAILED DESCRIPTION

[0020] The present invention will be further described in detail below through specific embodiments. The following embodiments are merely descriptive and not restrictive, and the protection scope of the present invention cannot be limited by them.

[0021] like Figure 1 As shown, a hydraulic pipeline explosion-proof valve group, the innovation of which is: comprising a valve block 1 and an oil rod raising unit and an oil cylinder lowering unit arranged in parallel in the valve block, the oil rod raising unit comprising a first non-return valve 6, a first explosion-proof valve 8, an E oil port 2 and an F oil port 3, the E oil port and the F oil port are respectively arranged on two adjacent valve block walls of the valve block, a first right-angle flow channel is formed between the E oil port and the F oil port, a first explosion-proof valve is installed in the first right-angle flow channel, a first buffer flow channel connected in parallel with the first right-angle flow channel is arranged in the valve block, and a first non-return valve is installed in the first buffer flow channel;

[0022] The cylinder lowering unit includes a second one-way valve 7, a second explosion-proof valve 9, an M oil port 4 and an N oil port 5. The M oil port and the N oil port are respectively arranged directly below the E oil port and the F oil port. A second right-angle flow channel is formed between the M oil port and the N oil port. A second explosion-proof valve is installed in the second right-angle flow channel. A second buffer flow channel connected in parallel with the second right-angle flow channel is provided in the valve block, and a second one-way valve is installed in the second buffer flow channel.

[0023] like Figure 3 As shown, the utility model is connected in the execution system, that is, the E oil port and the M oil port are connected to the directional control valve 16, the F oil port is connected to the rodless chamber of the hydraulic cylinder, and the N oil port is connected to the rod chamber of the hydraulic cylinder.

[0024] When the actuator cylinder is raised, the hydraulic oil flows out from the E port through the first non-return valve and the first explosion-proof valve, and then flows into the rodless chamber of the hydraulic cylinder. The hydraulic oil flows from the rod chamber of the hydraulic cylinder through the N port, passes through the second explosion-proof valve, and returns to the hydraulic oil tank from the M port.

[0025] When the actuator cylinder falls, the hydraulic oil flows out from the M oil port through the second one-way valve and the second explosion-proof valve, and then flows into the rod chamber of the hydraulic cylinder. The hydraulic oil flows from the rodless chamber of the hydraulic cylinder through the F oil port, passes through the first explosion-proof valve, and returns to the hydraulic oil tank from the E oil port.

[0026] The first one-way valve and the second one-way valve in each buffer flow channel can share a portion of the flow entering the first explosion-proof valve and the second explosion-proof valve from the E oil port and the M oil port, thereby reducing the risk of impact damage to the explosion-proof valve due to frequent startup of the equipment actuator.

[0027] The explosion-proof valve assembly 15 can alleviate the impact of the oil flow on the first explosion-proof valve and the second explosion-proof valve in the flow channel by designing the first right-angle flow channel and the second right-angle flow channel as right-angle flow channels.

[0028] The first explosion-proof valve and the second explosion-proof valve both include a valve body 14, a hexagon socket screw 11, a valve core baffle 10, a spring 12 and a locking nut 13. A valve body is provided in the first right-angle flow channel and the second right-angle flow channel. A buffer through hole is opened in the middle of the valve body, and a concentric locking nut is fixedly installed on the outer side of the buffer through hole. The hexagon socket screw is inserted from the inner side of the buffer through hole and threadedly connected to the locking nut. A spring is installed on the rod of the hexagon socket screw, and a valve core baffle is provided at the lower part of the nut of the buffer screw.

[0029] When the pipeline after the E oil port or the M oil port is broken, the valve core baffle and the nut of the hexagon socket screw are simultaneously acted upon by the liquid pressure to compress the spring and close the buffer hole of the valve body, thereby preventing the oil from the F oil port and the N oil port from flowing out, protecting the actuator connected thereto and avoiding the problem of the actuator stalling and falling.

[0030] Furthermore, the buffer screw and the valve core baffle are a split structure that fits into each other, which can effectively alleviate the problem of local stress concentration on the valve core baffle after it is subjected to a reverse impact.

[0031] The hexagon socket screw can conveniently adjust the gap between the valve core baffle and the valve body buffer through hole, thereby facilitating the adjustment of the explosion-proof valve to an optimal flow characteristic to meet the needs of the system.

[0032] The working principle of the utility model is:

[0033] When the lifting mechanism of the equipment is lifting or lowering, the instantaneous large flow of pressure oil passes through the explosion-proof valve and the one-way valve and enters the oil chamber of the actuator cylinder. The pressure oil in the other chamber of the cylinder returns to the hydraulic oil tank through the second explosion-proof valve. The set one-way valve and right-angle flow channel will alleviate the impact of flow pulsation on the explosion-proof valve, thereby increasing the service life of the explosion-proof valve.

[0034] When a pipeline ruptures, the explosion-proof valve and the one-way valve will simultaneously disconnect the connection between the cylinder cavity and the system oil inlet, thereby protecting the actuator from the risk of stalling and falling.

[0035] Although the embodiments and drawings of the present invention are disclosed for illustrative purposes, those skilled in the art will appreciate that various substitutions, changes and modifications are possible without departing from the spirit and scope of the present invention and the appended claims. Therefore, the scope of the present invention is not limited to the contents disclosed in the embodiments and drawings.

Claims

1. A hydraulic pipeline explosion-proof valve group, characterized in that: It comprises a valve block and an oil rod raising unit and an oil cylinder lowering unit arranged in parallel in the valve block, the oil rod raising unit comprises a first one-way valve, a first explosion-proof valve, an E oil port and an F oil port, the E oil port and the F oil port are respectively arranged on two adjacent valve block walls of the valve block, a first right-angle flow channel is formed between the E oil port and the F oil port, a first explosion-proof valve is installed in the first right-angle flow channel, a first buffer flow channel connected in parallel with the first right-angle flow channel is arranged in the valve block, and a first one-way valve is installed in the first buffer flow channel; The cylinder lowering unit includes a second one-way valve, a second explosion-proof valve, an M oil port and an N oil port. The M oil port and the N oil port are respectively arranged directly below the E oil port and the F oil port. A second right-angle flow channel is formed between the M oil port and the N oil port. A second explosion-proof valve is installed in the second right-angle flow channel. A second buffer flow channel connected in parallel with the second right-angle flow channel is provided in the valve block, and a second one-way valve is installed in the second buffer flow channel.

2. The explosion-proof valve group for hydraulic pipelines according to claim 1, characterized in that: The first explosion-proof valve and the second explosion-proof valve both include a valve body, a hexagon socket screw, a valve core baffle, a spring and a locking nut. A valve body is arranged in the first right-angle flow channel and the second right-angle flow channel. A buffer through hole is opened in the middle of the valve body, and a concentric locking nut is fixedly installed on the outer side of the buffer through hole. The hexagon socket screw is inserted from the inner side of the buffer through hole and threadedly connected to the locking nut. A spring is installed on the rod of the hexagon socket screw, and a valve core baffle is arranged at the lower part of the nut of the buffer screw.

3. The explosion-proof valve group for hydraulic pipelines according to claim 2, characterized in that: The buffer screw and the valve core baffle are a split structure that is mutually fitted.

Images