A hydraulic valve table with an online flushing circuit for the main pipeline in front of the valve table

Abstract

The present invention relates to a hydraulic valve station with an online flushing circuit for a main pipeline in front of a valve station. The online flushing circuit for the main pipeline in front of the valve station includes a first connecting pipe, a second connecting pipe, a third connecting pipe, and a first three-way valve, a second three-way valve, and a third three-way valve installed on the first connecting pipe, the second connecting pipe, and the third connecting pipe. When the hydraulic valve station is working normally, the first port and the second port of the first three-way valve, the second three-way valve, and the third three-way valve are connected. When the hydraulic valve station is flushed, the first port and the third port of the first three-way valve, the second three-way valve, and the third three-way valve are connected. The present invention can avoid the disadvantage that a temporary pipeline needs to be connected in a loop when flushing the valve station pipeline, and can complete the online flushing of the main pipeline in front of the valve station, greatly reducing the flushing action time, improving work efficiency, reducing material waste, and saving costs.

Description

Technical Field

[0001] The invention relates to the field of metallurgy, and in particular to a hydraulic valve table with an online flushing circuit of a main pipeline in front of the valve table. Background Art

[0002] In the industrial field, hydraulic systems are widely used. The cleanliness of the oil in the hydraulic system pipeline directly affects the normal operation of the hydraulic system. After the hydraulic system piping is completed, the hydraulic valve station and actuator (hydraulic cylinder or hydraulic motor) must be separated and the pipeline must be strictly flushed until the cleanliness meets the standard.

[0003] For the flushing of the annular pipe connection of the pipelines before and after the valve station, the control valve group of the valve station is usually disconnected, and the valve station oil supply pipe (P pipe), oil return pipe (T pipe), oil drain pipe (L pipe) and valve station outlet A pipe and B pipe are welded in series with the annular pipe using steel pipes and pipe fittings. The flushing liquid in the turbulent state enters the oil from the P port, passes through the A pipe and B pipe, and then returns to the oil tank through the T pipe and L pipe to circulate and flush the pipeline. Each valve station needs to be welded to make a specific temporary pipeline. A large amount of welding and reinstallation work will introduce new pollution and extend the flushing time. The welding of temporary annular pipes not only consumes a lot of manpower and wastes materials, but also affects the construction period. Summary of the invention

[0004] The present invention aims to provide a hydraulic valve station with an online flushing circuit for the main pipeline in front of the valve station to solve the above problems. To this end, the specific technical solutions adopted by the present invention are as follows:

[0005] A hydraulic valve station with an online flushing circuit for a main line before the valve station, wherein the main line before the valve station includes an oil inlet line, an oil return line and an oil drain line, and the hydraulic valve station has ports P, T and Y respectively connected to the oil inlet line, the oil return line and the oil drain line for fluid, and the online flushing circuit for the main line before the valve station includes a first connecting pipe, a second connecting pipe, a third connecting pipe, a first three-way valve, a second three-way valve and a third three-way valve, wherein one end of the first connecting pipe is connected to the oil inlet line, and the other end is connected to the port P of the hydraulic valve station for fluid, and one end of the second connecting pipe is connected to the oil return line, and the other end is connected to the port of the hydraulic valve station for fluid. T fluid is connected, one end of the third connecting pipe is connected to the oil drain pipeline, and the other end is connected to the port Y of the hydraulic valve station, the first port a and the second port b of the first three-way valve, the second three-way valve and the third three-way valve are respectively installed on the first connecting pipe, the first connecting pipe and the third connecting pipe, and the third ports c thereof are connected to each other fluidically, when the hydraulic valve station is working normally, the first port a and the second port b of the first three-way valve, the second three-way valve and the third three-way valve are connected, and when the hydraulic valve station is flushed, the first port a and the third port c of the first three-way valve, the second three-way valve and the third three-way valve are connected.

[0006] Furthermore, the first connecting tube, the second connecting tube and the third connecting tube are in a U shape and are nested from outside to inside.

[0007] Furthermore, each end of the first connecting pipe, the second connecting pipe and the third connecting pipe is provided with a quick connector.

[0008] Further, the third port c of the second three-way valve and the third port c of the third three-way valve are connected via a fifth connecting pipe, and the third port c of the first three-way valve is connected to the fifth connecting pipe via a fourth connecting pipe.

[0009] Furthermore, the first three-way valve, the second three-way valve and the third three-way valve are all three-way plate-type ball valves.

[0010] Furthermore, a ball valve is installed on the oil inlet pipeline, and check valves are installed on the oil return pipeline and the oil drain pipeline, respectively.

[0011] The present invention adopts the above technical scheme, which has the beneficial effect that: the present invention can avoid the disadvantage that temporary pipelines need to be connected in a ring for flushing the valve table pipeline, and can complete the online flushing of the main pipeline in front of the valve table, which greatly reduces the flushing time, improves work efficiency, reduces material waste, and saves costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] To further illustrate the various embodiments, the present invention provides drawings. These drawings are part of the disclosure of the present invention, which are mainly used to illustrate the embodiments and can be used in conjunction with the relevant descriptions in the specification to explain the operating principles of the embodiments. With reference to these contents, a person of ordinary skill in the art should be able to understand other possible implementations and advantages of the present invention. The components in the figures are not drawn to scale, and similar component symbols are generally used to represent similar components.

[0013] Figure 1 It is a structural schematic diagram of a hydraulic valve station with an online flushing circuit of a main pipeline in front of the valve station according to the present invention, wherein the hydraulic valve station is shown to be in a normal working state;

[0014] Figure 2 yes Figure 1 The structure diagram of the hydraulic valve station with an online flushing circuit of the main line in front of the valve station is shown when flushing the main line in front of the valve station. DETAILED DESCRIPTION

[0015] The present invention will now be further described with reference to the accompanying drawings and specific implementation methods.

[0016] Reference Figure 1 and 2, describes a hydraulic valve station with an online flushing circuit 1 of the main pipeline before the valve station. Among them, the main pipeline before the valve station includes an oil inlet pipeline (hereinafter referred to as P pipe), an oil return pipeline (hereinafter referred to as T pipe) and an oil drain pipeline (hereinafter referred to as L pipe), and the oil inlet pipeline, the oil return pipeline and the oil drain pipeline are respectively provided with a ball valve 6, a first check valve 7 and a second check valve 8. The control valve group circuit 2 of the hydraulic valve station has ports P, T and Y respectively connected to the P pipe, the T pipe and the L pipe fluid. The valve station control valve group circuit 2 may include an electromagnetic reversing valve 21, a stacked double hydraulic control check valve 22 and a stacked double one-way throttle valve 23. The electromagnetic reversing valve stack 21 has ports P, T, and Y, which are respectively connected to the ports P2, T2, and L2 of the connection block 1. The stacked double one-way throttle valve 23 has ports A and B, which are respectively connected to the hydraulic cylinder 5 fluid through corresponding pipelines (specifically, the outlet pipe 3 and the connecting hose 4). The online flushing circuit 1 of the main line before the valve station includes a first connecting pipe 11, a second connecting pipe 12, a third connecting pipe 13, a first three-way valve 14, a second three-way valve 15 and a third three-way valve 16, wherein one end of the first connecting pipe 11 is connected to the P pipe, and the other end is in fluid communication with the port P of the valve station control valve group circuit 2, one end of the second connecting pipe 12 is connected to the T pipe, and the other end is in fluid communication with the port T of the valve station control valve group circuit 2, and one end of the third connecting pipe 13 is connected to the L pipe, and the other end is in fluid communication with the port Y of the valve station control valve group circuit 2. The first port a and the second port b of the first three-way valve 14, the second three-way valve 15 and the third three-way valve 16 are respectively installed on the first connecting pipe 11, the first connecting pipe 12 and the third connecting pipe 13, and their third ports c are in fluid communication with each other. When the hydraulic valve station is working normally, the first port a and the second port b of the first three-way valve 14, the second three-way valve 15 and the third three-way valve 16 are connected, and the third port c is blocked. The P tube, T tube and L tube are respectively connected to the fluid of each control valve group circuit of the hydraulic valve station. When the hydraulic valve station is flushed, the first port a and the third port c of the first three-way valve 14, the second three-way valve 15 and the third three-way valve 16 are connected, and the second port b is blocked, that is, the P tube, T tube and L tube are isolated from each control circuit of the hydraulic valve station. In other words, by switching the operation of the three three-way valves 14-16, the ring connection of the P tube to the tube and the L tube can be completed directly online, and the connection with each control circuit of the valve station can be cut off. After the flushing pump station is supplied with oil, the main pipeline in front of the valve station can be directly flushed online, which is very convenient.

[0017] In this embodiment, the first connecting pipe 11, the second connecting pipe 12 and the third connecting pipe 13 are all U-shaped and nested from outside to inside. That is, the first connecting pipe 11 is located at the outermost side and has the longest length, the second connecting pipe 12 is located in the middle and has the second longest length, and the third connecting pipe 13 is located at the innermost side and has the shortest length. It should be understood that the first connecting pipe 11, the second connecting pipe 12 and the third connecting pipe 13 can also be straight pipes or other shapes. Of course, the first connecting pipe 11, the second connecting pipe 12 and the third connecting pipe 13 can also be omitted, and the first three-way valve 14, the second three-way valve 15 and the third three-way valve 16 are directly installed on the P pipe, T pipe and L pipe near the ports P, T and Y of the hydraulic valve station.

[0018] Preferably, in order to facilitate connection, each end of the first connecting pipe 11, the second connecting pipe 12 and the third connecting pipe 13 is provided with a quick connector.

[0019] In this embodiment, the third port c of the second three-way valve 15 and the third port c of the third three-way valve 16 are connected via a fifth connecting pipe 18, and the third port c of the first three-way valve 4 is connected to the fifth connecting pipe 18 via a fourth connecting pipe 17. That is, the fourth connecting pipe 17 and the fifth connecting pipe 18 are connected via a three-way joint.

[0020] Preferably, the first three-way valve 14 , the second three-way valve 15 and the third three-way valve 16 are all three-way plate-type ball valves.

[0021] Briefly describe the working process of the present invention below:

[0022] Step 1: If Figure 1 As shown, the three three-way valves 14-16 are all placed in the position of a to b, and the c path is blocked; at this time, the P pipe and the T and L pipes do not form a loop, and this state is the normal working position of the valve station.

[0023] Step 2: If Figure 2 As shown, the three three-way valves 14-16 are all placed in the position of a to c, and b is blocked; open the ball valve 6, and the flushing oil supplied by the flushing pump station passes through the P pipe and the first three-way valve 14 (a to c) in sequence, and then returns to the T pipe through the second three-way valve 15 (c to a) and the first check valve 7, and returns to the L pipe through the third three-way valve 16 (c to a) and the first check valve 8; the flushing oil in the T pipe and L pipe flows back to the return oil filter at the flushing pump station, and returns to the flushing oil tank after being filtered by the return oil filter. Through continuous circulation flushing, the oil cleanliness level in the main pipeline meets the requirements.

[0024] The present invention can avoid the disadvantage that temporary pipelines need to be connected in a loop for flushing the valve platform pipeline, and can complete online flushing of the main pipeline in front of the valve platform, greatly reducing the flushing time, improving work efficiency, reducing material waste, and saving costs.

[0025] Although the present invention has been specifically shown and described in conjunction with the preferred embodiments, it should be understood by those skilled in the art that various changes may be made to the present invention in form and details without departing from the spirit and scope of the present invention as defined by the appended claims, all of which are within the scope of protection of the present invention.

Claims

1. A hydraulic valve station with an online flushing circuit for a main pipeline in front of the valve station, wherein the main pipeline in front of the valve station includes an oil inlet pipeline, an oil return pipeline and an oil drain pipeline, and the control valve group circuit of the hydraulic valve station has ports P, T and Y respectively connected to the oil inlet pipeline, the oil return pipeline and the oil drain pipeline, characterized in that: The online flushing circuit of the main pipeline before the valve station includes a first connecting pipe, a second connecting pipe, a third connecting pipe, a first three-way valve, a second three-way valve and a third three-way valve, wherein one end of the first connecting pipe is connected to the oil inlet pipeline, and the other end is fluidly connected to the port P of the hydraulic valve station, one end of the second connecting pipe is connected to the oil return pipeline, and the other end is fluidly connected to the port T of the hydraulic valve station, one end of the third connecting pipe is connected to the oil drain pipeline, and the other end is fluidly connected to the port Y of the hydraulic valve station, the first port a and the second port b of the first three-way valve, the second three-way valve and the third three-way valve are respectively installed on the first connecting pipe, the second connecting pipe and the third connecting pipe, and the third ports c thereof are fluidly connected to each other, when the hydraulic valve station is working normally, the first port a and the second port b of the first three-way valve, the second three-way valve and the third three-way valve are connected, and when the hydraulic valve station is flushed, the first port a and the third port c of the first three-way valve, the second three-way valve and the third three-way valve are connected; The first connecting pipe, the second connecting pipe and the third connecting pipe are U-shaped and nested from outside to inside; the third port c of the second three-way valve and the third port c of the third three-way valve are connected by a fifth connecting pipe, and the third port c of the first three-way valve is connected to the fifth connecting pipe by a fourth connecting pipe.

2. The hydraulic valve station with an online flushing circuit for the main pipeline before the valve station as claimed in claim 1, characterized in that: Each end of the first connecting pipe, the second connecting pipe and the third connecting pipe is provided with a quick connector.

3. The hydraulic valve station with an online flushing circuit for the main pipeline before the valve station as claimed in claim 1, characterized in that: The first three-way valve, the second three-way valve and the third three-way valve are all three-way plate-type ball valves.

4. The hydraulic valve station with an online flushing circuit for the main pipeline before the valve station as claimed in claim 1, characterized in that: A ball valve is installed on the oil inlet pipeline, and check valves are installed on the oil return pipeline and the oil drain pipeline respectively.

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