Servo valve replacement device for flushing hydraulic pipeline

Abstract

The utility model discloses a servo valve replacement device for flushing a hydraulic pipeline, which comprises a flushing plate and a hose, the flushing plate is fixed on a valve block to be flushed through bolts, four through oil holes, namely a hole P, a hole T, a hole A and a hole B, are processed on the flushing plate, one end of the hole P and one end of the hole T are respectively communicated with a port P and a port T on the valve block, and the other end of the hole A is communicated with a port B on the valve block. One end of the hole A and one end of the hole B are communicated with the two working oil ports in the valve block respectively, the head end of the hose is detachably connected with the other end of the hole P, the tail end of the hose is detachably connected with the other end of the hole T, the hole A or the hole B, and the other ends of the two oil holes which are not connected with the hose are plugged through screwed plugs. The main pipeline of the hydraulic system is communicated with different branch pipelines by changing the connection mode of the hose and the oil holes in the flushing plate, so that the main pipeline and all the branch pipelines behind the valve are circularly flushed, the universality and the utilization rate of the flushing plate are greatly improved, and the flushing cost of the hydraulic pipeline is reduced.

Description

Technical Field

[0001] This utility model relates to a device used for flushing hydraulic pipelines in a hydraulic system, which replaces the servo valve to connect the oil circuit and can prevent debris in the hydraulic pipeline from damaging the servo valve. It belongs to the field of hydraulic technology. Background Technology

[0002] The hydraulic system of a medium-thick plate production line is crucial for the stable operation of the entire production line, and the cleanliness of the hydraulic system oil is key to its stable operation. If the hydraulic system oil cleanliness does not meet the standards, the servo valve core is prone to wear and jamming, seriously affecting the stable operation of the hydraulic system. The servo valve is a core component of the hydraulic system; it has high control precision but also high procurement and maintenance costs. If a servo valve malfunctions, it requires repair by a specialized manufacturer, increasing maintenance costs. Therefore, the hydraulic equipment in a medium-thick plate production line has high requirements for oil cleanliness, generally requiring a NAS6 level or higher. However, during the installation of hydraulic equipment, some welding slag and debris generated during hydraulic pipeline installation and welding may remain inside the pipelines. Therefore, the entire hydraulic pipeline needs to be circulated and flushed to ensure the system oil cleanliness requirements are met. However, since the hydraulic equipment uses servo valves and proportional valves as the control core, and the servo valves cannot be circulated and flushed along with the valve block, it is necessary to replace the servo valves and proportional valves with flushing plates to flush the valve block and pipelines, ensuring that every pipeline and valve block in the system is flushed to meet the oil cleanliness requirements.

[0003] Existing flushing plates are generally integral structures with fixed oil holes, P through A / B through T, or P through T. When flushing hydraulic lines in series, flushing plates need to be machined separately according to the oil ports. That is, different flushing plates need to be machined to flush different hydraulic lines, resulting in poor versatility and low utilization of flushing plates, which greatly increases the flushing cost of hydraulic lines. Therefore, it is necessary to design a servo valve replacement device with strong versatility. Utility Model Content

[0004] The purpose of this invention is to address the shortcomings of existing technologies by providing a servo valve replacement device for flushing hydraulic pipelines, thereby improving the versatility of the flushing plate and reducing the flushing cost of hydraulic pipelines.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] A servo valve replacement device for flushing hydraulic lines includes a flushing plate and a hose. The flushing plate is fixed to the valve block to be flushed by bolts. Four through oil holes are machined on the flushing plate, namely P hole, T hole, A hole and B hole. One end of the P hole and T hole are connected to the P port and T port on the valve block, respectively. One end of the A hole and B hole are connected to two working oil ports on the valve block, respectively. The first end of the hose is detachably connected to the other end of the P hole, and the tail end of the hose is detachably connected to the other end of the T hole, A hole or B hole. The other ends of the two oil holes not connected to the hose are sealed with plugs.

[0007] The aforementioned servo valve replacement device for flushing hydraulic lines has pipe fittings at both the beginning and end of the hose, and the pipe fittings are connected to the oil holes on the flushing plate via a pair of wires.

[0008] The aforementioned servo valve replacement device for flushing hydraulic pipelines has an O-ring between the flushing plate and the valve block, corresponding to each oil hole, and a sealing groove on the flushing plate that matches each O-ring.

[0009] The aforementioned servo valve replacement device for flushing hydraulic lines has a combined gasket installed between the wire and the flushing plate.

[0010] This invention connects the main pipeline of the hydraulic system with different branch pipelines by changing the connection method between the hose and the oil hole on the flushing plate, thereby realizing the cyclic flushing of the main pipeline and each branch pipeline after the valve. This greatly improves the versatility and utilization of the flushing plate, reduces the number of flushing plates to be processed, and lowers the flushing cost of the hydraulic pipeline. Attached Figure Description

[0011] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0012] Figure 1 This is a schematic diagram of the structure of this utility model (excluding the plug);

[0013] Figure 2 This is a schematic diagram of the rinsing plate, in which... Figure 2 (a) is the front view. Figure 2 (b) is a side view;

[0014] Figure 3 This is a schematic diagram of the structure of a filament;

[0015] Figure 4 This is a schematic diagram of the plug structure;

[0016] Figure 5 This is a schematic diagram of the hose structure.

[0017] The markings in the diagram are as follows: 1. O-ring seal, 2. flushing plate, 3. combination gasket, 4. threaded connection, 5. hose, 6. plug. Detailed Implementation

[0018] This invention addresses the shortcomings of existing technologies by providing a servo valve replacement device for flushing hydraulic pipelines. This device achieves series flushing of different pipelines by reversing the use of hoses. It is simple and convenient to use, highly versatile, reduces the number of flushing plates to be processed, and lowers the flushing cost of hydraulic pipelines.

[0019] See Figures 1-5 This utility model mainly includes an O-ring seal 1, a flushing plate 2, a combination gasket 3, a threaded connection 4, a hose 5, and a plug 6.

[0020] As shown in the diagram, the flushing plate 2 has four through-holes: P-hole, T-hole, A-hole, and B-hole. The flushing plate 2 is fixed to the valve block. One end of the P-hole of the flushing plate 2 connects to the P-port on the valve block, one end of the T-hole connects to the T-port on the valve block, and one end of the A-hole and B-hole connects to two working oil ports on the valve block (i.e., the oil ports corresponding to the actuators). Each oil port on the valve block is connected to its corresponding pipeline to ensure the integrity of the hydraulic system's oil circuit and to realize the action of the actuator.

[0021] As shown in the figure, an O-ring 1 corresponding to each oil hole is provided between the flushing plate 2 and the valve block. The other end of the four oil holes is machined with an internal thread that matches the external thread of the threaded wire 4 and the plug 6, so that it can be connected to the threaded wire 4 or the plug 6 can be installed.

[0022] As shown in the figure, both ends of the hose 5 are equipped with pipe fittings. The hose 5 and the pipe fittings are pressed into a whole by a crimping machine. The pipe fittings are equipped with internal threads that match the external threads of the threaded wire 4. The hose 5 is connected to the threaded wire 4 on the flushing plate 2 through the pipe fittings. The P port on the valve block is connected to the T port, A port and B port through the hose 5, so as to realize the circulation flushing of the main pipeline (the pipeline corresponding to the P port) and the branch pipelines after the valve (the pipelines corresponding to the T port, A port and B port).

[0023] A flushing plate 2 is fabricated to replace the servo valves according to different specifications and models. The flushing plate 2 has mounting bolt holes and four oil holes machined on it, with the positions of these holes matching those on the servo valve. Each oil hole on the flushing plate 2 has a sealing groove around one end for installing an O-ring seal 1, and an internal thread machined at the other end for installing a threaded connector 4 and a plug 6. The flushing plate 2 is bolted to the valve block to be flushed. A combination washer 3 is installed between the threaded connector 4 and the flushing plate 2 to ensure a seal. The threaded connectors 4 installed in each oil hole are connected together via a hose to form a channel. A hose 5 connects port P to port T, port A, or port B, connecting the hydraulic system pipelines in series to form a loop. This allows for the circulating flushing of the main pipeline and downstream branch pipelines, ensuring the system oil cleanliness meets the required standards.

[0024] The method of using this utility model is as follows: First, place the O-ring 1 into the sealing groove on the flushing plate 2. Then, fix the flushing plate 2 to the valve block to be flushed with bolts. Next, connect the pipe connector at the head end of the hose 5 to the P hole on the flushing plate 2 through the threaded wire 4. Connect the pipe connector at the tail end of the hose 5 to the A hole, T hole and B hole in sequence through another threaded wire 4. Seal the oil holes not connected to the hose 5 with the plug 6. For each oil hole connected to the tail end of the hose 5, start the oil pump to flush the corresponding hydraulic pipeline, so as to realize the circulation flushing of the main pipeline and the branch pipelines after the valve.

[0025] This utility model replaces the servo valve by circulating and flushing each pipeline in the system, which can ensure that the hydraulic system oil cleanliness meets the standards, reduce the failure rate of hydraulic system equipment, improve the operational stability of the hydraulic system, extend the service life of the hydraulic system servo valve and proportional valve, and at the same time reduce the cost of spare parts procurement and maintenance.

Claims

1. A servo valve replacement device for flushing a hydraulic line, characterized in that The utility model relates to a kind of flush valve, including flush plate (2) and hose (5), the flush plate (2) is bolted on the valve block to be flushed, four through oil holes are machined on flush plate (2), are P hole, T hole, A hole and B hole respectively, the one end of P hole and T hole is communicated with P port and T port on valve block respectively, the one end of A hole and B hole is communicated with two working oil ports on valve block respectively, the first end of hose (5) is detachably connected with the other end of P hole, the tail end of hose (5) is detachably connected with the other end of T hole, A hole or B hole, the other end of two oil holes not connected with hose (5) is sealed with plug (6).

2. A servo valve replacement device for purging hydraulic lines according to claim 1, characterized in that The first end and the tail end of the hose (5) are provided with pipe joints, and the pipe joints are connected with the oil holes on the flush plate (2) through the wires (4).

3. A servo valve replacement device for purging hydraulic lines according to claim 2, characterized in that O-shaped sealing rings (1) corresponding to each oil hole are arranged between the flush plate (2) and the valve block, and sealing grooves matched with each O-shaped sealing ring (1) are arranged on the flush plate (2).

4. A servo valve replacement device for purging hydraulic lines according to claim 3, characterized in that A combined gasket (3) is installed between the wires (4) and the flush plate (2).

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