CN-121972308-A - High-pressure self-feeding spray head structure for laying underground cable pipeline

CN121972308ACN 121972308 ACN121972308 ACN 121972308ACN-121972308-A

Abstract

The invention discloses a high-pressure self-feeding spray head structure for laying an underground cable pipeline, which comprises a shell and a valve core, wherein the shell comprises a first adapting cavity, a jet forming neck, a second adapting cavity and a third adapting cavity, a side pushing pore canal communicated to the outside of the shell is formed in the second adapting cavity, the valve core comprises an elastic component, a sliding valve sleeve and a flow guiding head, the flow guiding head comprises a flow guiding head body and a column end, the sliding valve sleeve comprises a sliding valve sleeve body and a first connecting rod, a first through hole is formed in the sliding valve sleeve body, the elastic component comprises a resisting seat, a second connecting rod and a reset spring, and the opening, closing and switching of a flow passage in the valve core are controlled by adjusting axial displacement of the valve core in the shell. The high-pressure self-feeding spray head structure for laying the underground cable pipeline controls the opening and closing and switching of the flow passage in the valve core by adjusting the axial displacement of the valve core in the shell, has simple structure and is easy to repair and maintain.

Inventors

MA XINGLONG
FENG YUEBO
YANG WEIZHEN
Fu Qisi
WANG JING
LI JICHANG
DING HAOXIANG
LI ZHE

Assignees

深圳供电局有限公司

Dates

Publication Date: 20260505
Application Date: 20260323

Claims (10)

1. The high-pressure self-feeding spray head structure for laying the underground cable pipeline is characterized by comprising a shell and a valve core which is sleeved in the shell and can reciprocate along the shell; The shell comprises a first adapting cavity, a jet forming neck connected with the first adapting cavity, a second adapting cavity connected with the jet forming neck and a third adapting cavity connected with the second adapting cavity, wherein a side pushing pore canal communicated to the outside of the shell is arranged on the second adapting cavity; the valve core comprises an elastic component, a sliding valve sleeve and a flow guiding head, wherein the elastic component is adaptively installed in the third adapting cavity, the sliding valve sleeve is adaptively installed in the second adapting cavity, and the flow guiding head is adaptively installed in the first adapting cavity; The flow guide head comprises a flow guide head body and a column end head which can be adaptively inserted into the jet flow forming neck for flow passage, wherein one end of the column end head is connected with the flow guide head body; the sliding valve sleeve comprises a sliding valve sleeve body capable of reciprocating along the second adapting cavity and a first connecting rod connected to one end of the sliding valve sleeve body, one end of the first connecting rod is connected to the other end opposite to the end head of the column, and a first through hole is formed in the sliding valve sleeve body; The elastic component comprises a resisting seat capable of reciprocating along the third adapting cavity, a second connecting rod connected to the resisting seat and a return spring sleeved on the second connecting rod, one end of the second connecting rod is connected to the opposite end of the sliding valve sleeve body, and the opposite ends of the return spring are respectively abutted against the resisting seat and the sliding valve sleeve body, wherein: And the on-off and switching of the flow passage in the valve core are controlled by adjusting the axial displacement of the valve core in the shell.
2. The high-pressure self-advancing nozzle structure for laying an underground cable duct according to claim 1, wherein the withstanding seat is hydraulically pushed, and the first through hole is matched and corresponds to the side advancing duct and conducts the side advancing duct through the linkage of the second connecting rod, the sliding valve sleeve body and the first connecting rod, and the column end is separated from the jet forming neck; The return spring releases pretightening force, the sliding valve sleeve and the flow guide head are linked to retract respectively, the column end head is inserted into the jet forming neck, and the sliding valve sleeve body seals the side pushing pore canal.
3. The high pressure self-advancing spray head structure for underground utility tunnel laying of claim 1, wherein said first adapter chamber comprises an inner sidewall and a connecting wall connected to said inner sidewall, said connecting wall connected to an inner wall of said jet forming neck; one side of the flow guiding head body is provided with a side resisting wall which can be fit and attached to the connecting wall.
4. A high pressure self-advancing spray head structure for underground utility tunnel laying as claimed in claim 3, wherein the inner diameter dimension of said inner sidewall is greater than the outer diameter dimension of said deflector body, and a spray orifice is formed between said deflector body and said inner sidewall.
5. The high-pressure self-propelled nozzle structure for laying an underground cable conduit according to claim 1, wherein the central axis of the side propelling passage and the central axis of the housing are at an angle to each other, and the fluid is injected through the side propelling passage to generate propelling force to one side of the high-pressure self-propelled nozzle.
6. The high-pressure self-feeding nozzle structure for laying an underground cable conduit according to claim 1, wherein one end side of the third adapting cavity of the housing is provided with a water inlet sealing surface, and the water inlet sealing surface is an annular end surface structure.
7. The high pressure self-advancing spray head structure for underground utility tunnel laying of claim 1, wherein the outer diameter dimension of the post head is smaller than the inner diameter dimension of the jet forming neck, such that the post head is adapted to be inserted into the jet forming neck to form an annular flow channel.
8. The high-pressure self-feeding nozzle structure for laying underground cable pipelines according to claim 1, wherein a plurality of water passing holes are respectively formed on one side end face of the resisting seat and one side end face of the sliding valve sleeve body.
9. The high pressure self-advancing spray head structure for underground cable duct laying of claim 1, wherein the abutment is flange-like and the slide valve sleeve body is hollow cylindrical.
10. The high pressure self-advancing spray head structure for underground cable duct laying of claim 1, wherein a central axis of the abutment, a centerline axis of the second connecting rod, a central axis of the slide sleeve body, a central axis of the first connecting rod, a central axis of the post head, and a centerline axis of the deflector head body are collinear.

Description

High-pressure self-feeding spray head structure for laying underground cable pipeline Technical Field The invention relates to the technical field of high-pressure self-feeding spray heads, in particular to a high-pressure self-feeding spray head structure for laying an underground cable pipeline. Background With the advancement of urban construction, underground cable pipelines have become an important component of power transmission networks. The embedded cable duct has the main functions of providing a reliable underground physical protection channel for the power cable and effectively isolating soil corrosion, moisture corrosion and damage of external mechanical external force. Meanwhile, the standardized embedded pipe network provides convenience for laying, replacing and overhauling the cable and increasing capacity of future lines, and repeated excavation of urban roads due to line maintenance is avoided. However, in the laying construction stage or long-term operation process of the cable duct, the interior of the duct is extremely prone to being blocked, so that the cable cannot be smoothly threaded. The current industry mainly adopts a high-pressure water jet dredging method, namely a high-pressure water pump is utilized to generate high-pressure fluid, a high-pressure hose and a special cleaning spray nozzle are connected, the spray nozzle is utilized to impact and break up a blockage by forward jet flow, and at the same time, the spray nozzle is pushed to automatically advance in a pipeline by the recoil force generated by backward jet flow, and the flushed sediment and scraps are carried out. The operation mode has the following technical defects that 1, in pipeline dredging operation, a spray head is placed in a severe environment filled with high-concentration slurry and broken stone, when a high-pressure pump is stopped and is out of pressure or equipment is reversely dragged and recovered, the high pressure in the spray head is rapidly dissipated, and local negative pressure (piston effect) is generated due to rapid movement of the device in a pipe, so that external slurry is driven by pressure difference to flow backward along a normally-open nozzle Kong Niliu, and directly invades a precise valve cavity and a spring bin in the spray head. 2. The structural design is unreasonable, and irreversible damage to the core component is easily caused. Disclosure of Invention The invention aims to solve the technical problem of providing the high-pressure self-feeding spray head structure for laying the underground cable pipeline, which controls the on-off and switching of the flow passage in the valve core by adjusting the axial displacement of the valve core in the shell, and has the advantages of simple structure and easy maintenance. In order to solve the technical problems, the invention provides a high-pressure self-feeding spray head structure for laying an underground cable pipeline, which comprises a shell and a valve core, wherein the valve core is sleeved in the shell and can reciprocate along the shell; the valve core comprises an elastic component, a sliding valve sleeve and a flow guiding head, wherein the elastic component is adaptively installed in the third adapting cavity, the sliding valve sleeve is adaptively installed in the second adapting cavity, the flow guiding head is adaptively installed in the first adapting cavity, the flow guiding head comprises a flow guiding head body and a column end which can be adaptively inserted into the flow channel formed by the flow guiding neck, one end of the column end is connected with the flow guiding head body, the sliding valve sleeve comprises a sliding valve sleeve body capable of performing reciprocating movement along the second adapting cavity and a first connecting rod which is connected with one end of the sliding valve sleeve body, one end of the first connecting rod is connected with the other end opposite to the column end, a first through hole is formed in the sliding valve sleeve body, the elastic component comprises a stop seat capable of performing reciprocating movement along the third adapting cavity, a second connecting rod which is connected with the stop seat and a second connecting rod which is sleeved with the second connecting rod, and a reset spring which is arranged in the first adapting cavity, the reset valve sleeve is in the valve sleeve body is in a switching manner, and the reset valve sleeve is in the valve core is in a switching manner, the reset valve sleeve is in the valve core is in the valve sleeve body, and the valve core is in the valve sleeve is in a switching manner, the valve sleeve is in the opposite to the valve sleeve is in the valve sleeve. The reset spring releases the pretightening force, the linkage slide valve sleeve and the flow guide head are respectively retracted, the column end is inserted into the jet flow forming neck, and the slide valve sleeve body seals the side pushing pore can