CN110685738A - A pressure relief device and control method for monitoring the pressure of paste filling pipeline - Google Patents

Abstract

A pressure relief device and a control method for monitoring the pressure of a paste filling pipeline belong to a pressure relief device and a control method for the pipeline pressure. The pressure relief device includes: a slurry valve and a pressure monitor; both the slurry valve and the pressure monitor are installed on the main pipeline. One end of the pressure monitor sleeve is fixedly connected to the main pipeline, and the other end is connected with a plug; there is a piston in the sleeve, and a seal on the side wall of the piston and the plug, located between the contact surface with the sleeve; in the plug There is an interface of a quick-sealing joint, the quick-sealing joint is connected between the plug and the tee, in the other two ports of the tee, one port is connected with a shock-resistant pressure gauge, and the other port is a pressure sensor interface, which is on the pressure sensor interface. A pressure sensor is connected. Advantages: the invention has compact structure, wear resistance, high pressure resistance, good sealing performance, convenient disassembly and maintenance, and simple and labor-saving operation. It can not only monitor the pipeline pressure at the front, but also activate the pressure relief device to protect the pipeline.

Description

A pressure relief device and control method for monitoring the pressure of paste filling pipeline

technical field

The invention relates to a pressure relief device and a control method for pipeline pressure, in particular to a pressure relief device and control method for monitoring the pressure of a paste filling pipeline.

Background technique

With the increasing demand for backfilling in coal mines, in the process of underground paste filling, due to the large number of backfilling faces and the long pipelines, there are various equipments in the system and various valve bodies on the working faces, because the equipment or work Due to uncertain failure factors such as surface conditions, the pressure of the pipeline may suddenly increase. In order to protect the safety of the filling system, it is necessary to immediately release the pressure in the pipeline and discharge the paste in the pipeline into the slurry pit. If a certain section of the pipeline on the surface fails, the slurry in the pipeline can also be discharged, which can avoid the slurry staying in the pipeline for too long and cause the pipeline to block. This requires a device that can monitor the pressure of the paste filling pipeline. And the pressure relief device, and because the filling pipeline pressure can reach 10MPa, this requires this device to withstand high pressure, and at the same time requires large diameter, not afraid of wear, compact structure, easy operation, easy disassembly and maintenance, etc.

At present, there is no device on the market that can monitor the pressure and pressure relief of the paste filling pipeline in coal mines, and many ordinary devices for monitoring the pressure of paste filling pipelines cannot meet the requirements of high pressure, small size, simple structure, and suitable for underground coal mines. Requirements for paste media, wear resistance, simple operation and maintenance.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a pressure relief device and control method for monitoring the pressure of the paste filling pipeline, which can quickly switch to ensure the safety of the pipeline and the discharge pipeline of the slurry, and avoid the damage to the pipeline caused by the excessive pressure of the pipeline and the leakage of the slurry in the pipeline. The residence time in the pipeline is too long to solidify and block the pipeline, thus ensuring the safety of the entire filling system.

The purpose of the present invention is achieved as follows: the present invention includes a pressure relief device and a control method using the pressure relief device.

The pressure relief device includes: a slurry valve and a pressure monitor; both the slurry valve and the pressure monitor are installed on the main pipeline.

The pressure monitor includes: a piston, a sleeve, a plug, a shock-resistant pressure gauge, a quick-sealing joint, a tee and a pressure sensor interface; one end of the sleeve is fixedly connected to the main pipeline, and the other end is connected with a plug; The cylinder has a piston, and there is a seal on the side wall of the piston and the plug, which is located between the contact surface with the sleeve; on the plug, there is an interface for a quick-seal joint, which is connected between the plug and the tee, and is located between the plug and the tee. The other two ports of the tee, one port is connected with a shock-resistant pressure gauge, the other port is a pressure sensor interface, and a pressure sensor is connected on the pressure sensor interface.

The slurry valve includes: a valve body, a sealing head, a sleeve, an inner cylinder body, a clamp, a No. 1 oil inlet and outlet joint, a connecting cylinder, an outer cylinder body, an end cover, a mandrel, a lifting lug, a first cavity, The second cavity, the third cavity, the No. 2 oil inlet and outlet joints, and the slurry outlet; there is a slurry outlet on the side wall of the valve body; one end of the valve body is fixedly connected to the main pipeline, and the other end of the valve body passes through the clamp It is connected with the outer cylinder body, an end cover is connected to the rear end of the outer cylinder body, a through hole is arranged in the end cover, a No. It is the third cavity; there is a No. 1 oil inlet and outlet joint on the outer cylinder body, and the No. 1 oil inlet and outlet joint is located in the second cavity;

There is a sleeve and an inner cylinder in the valve body; there is a sealing head in the sleeve, a connecting cylinder is connected to the rear end of the inner cylinder, and an inner mandrel is connected to the inner end of the connecting cylinder, and both the connecting cylinder and the mandrel are located in the inner cylinder. Inside; there is an oil passage hole on the inner cylinder body, one end of the oil passage hole is located at the position of the second cavity, and the other end of the oil passage hole is located at the position of the first cavity; the first cavity is located in the inner cylinder body The cavity between the mandrel and the mandrel; the sealing head seals and slides in the valve body and the sleeve; the rear of the inner cylinder seals and slides in the outer cylinder, and the front end is located in the valve body; the mandrel seals and slides in the inner cylinder, and the front end of the mandrel Push the seal head to seal the slide.

Control method using pressure relief device:

By controlling the two oil inlet and outlet ports of No. 1 oil inlet and outlet joint and No. 2 oil inlet and outlet joint, the opening or closing of the drain valve is realized. The remote and on-site pipeline pressure monitoring is realized through the pressure sensor, and the remote and on-site dual control of the drain valve is realized. Operation improves the safety of the filling piping system;

The valve body is connected with the main pipeline, and the sealing head is sealed with a U-shaped sealing ring in the direction of the outer cylinder body, which ensures the tightness of the whole pipeline; when the stop valve in front of the main pipeline is in the cut-off state or the pressure of the main pipeline is too large, the sealing head Pushed to the rear, the slurry outlet is communicated with the main pipeline, and the slurry in the main pipeline is discharged along the slurry outlet of the bypass;

The mandrel and the sealing head are threadedly connected, and the mandrel and the inner cylinder liner are sealed in the form of U-shaped and combined sealing. When the No. 1 oil inlet and outlet joints enter the oil, the hydraulic oil enters the first cavity, pushes the mandrel to move and drives the sealing head At the same time, the sealing head enters the sleeve, and the sealing of the sealing head is protected by the sleeve, and then moves together with the inner cylinder sleeve to open the slurry opening;

The connecting cylinder and the inner cylinder liner are connected by thread, and the oil inlet and outlet are opened in the middle, so that the first cavity and the second cavity are connected. The hydraulic oil in the rear second chamber will push the mandrel to move, thereby pushing the sealing head out of the sleeve and sealing the valve body.

Beneficial effects, due to the adoption of the above scheme,

1. Due to the adoption of the above-mentioned monitoring paste filling pipeline pressure and pressure relief device, real-time monitoring of the filling pipeline pressure can be realized, and pipeline pressure relief can be realized in emergencies to ensure the safety of the filling system.

2. Due to the use of the above monitoring paste filling pipeline pressure and pressure relief device, the slurry in the pipeline can be discharged when the machine is shut down for any reason, so as to avoid the slurry staying in the pipeline for too long and cause the pipeline to block, reducing the economical loss.

3. Due to the development of the above-mentioned monitoring paste filling pipeline pressure and pressure relief device, the valve is installed at the important node position of the slurry long-distance conveying pipeline, which can monitor the pressure at different positions in the pipeline and facilitate the investigation of accidents. and overhaul.

It can quickly switch to ensure the safety of the pipeline and the discharge of the slurry, avoid the damage to the pipeline caused by the excessive pressure of the pipeline and the solidification and blockage of the slurry in the pipeline for a long time, thus ensuring the safety of the entire filling system and achieving the present invention. the goal of.

Advantages: the invention has compact structure, wear resistance, high pressure resistance, good sealing, convenient disassembly and maintenance, and simple and labor-saving operation. It can not only monitor the pipeline pressure at the front, but also activate the pressure relief device to protect the pipeline. The device can be used as a safety valve for the paste filling pipeline, which plays an escort role for the safety and stability of the paste filling system. .

1. The above-mentioned monitoring paste filling pipeline pressure and pressure relief device can realize dual control of remote and on-site, which is convenient for on-site maintenance and remote control in the centralized control room.

2. The above-mentioned monitoring paste filling pipeline pressure and pressure relief device will not leak under high pressure conditions, and at the same time, the pressure of the pipeline can be grasped in real time, and the safety is greatly improved.

3. The above-mentioned monitoring paste filling pipeline pressure and pressure relief device is adopted, which has a simple structure, a small amount of parts, greatly reduces the failure rate, and is convenient for disassembly and maintenance.

4. The above-mentioned monitoring paste filling pipeline pressure and pressure relief device is adopted, with a compact structure, which can also be used and installed in a small space, and the remote control can realize unattended operation.

Description of drawings

FIG. 1 is a schematic diagram of the pressure monitoring structure of the monitoring paste filling pipeline pressure and pressure relief device of the present invention.

Fig. 2 is a schematic diagram of monitoring the pressure of the paste filling pipeline and the pressure relief device when the pressure relief device is completely closed according to the present invention.

FIG. 3 is a partial enlarged structural schematic diagram of the pressure monitor of FIG. 1 .

4 is a schematic diagram of the sealing head first entering the protective sleeve when monitoring the pressure of the paste filling pipeline and opening the pressure relief device according to the present invention.

FIG. 5 is a schematic diagram of monitoring the pressure of the paste filling pipeline and the pressure relief device when the pressure relief device is fully opened according to the present invention.

In the figure, 1, valve body; 2, sealing head; 3, sleeve; 4, inner cylinder body; 5, clamp; 6, No. 1 oil inlet and outlet joint; 7, connecting cylinder; 8, outer cylinder body; 9, end Cover; 10, mandrel; 11, pressure monitor; 12, piston; 13, sleeve; 14, plug; 15, shock-resistant pressure gauge; 16, quick seal joint; 17, tee; 18, pressure sensor interface; 19. Lifting ear; 20. The first cavity; 21. The second cavity; 22. The third cavity; 23. The No. 2 oil inlet and outlet; 24, the slurry outlet;

Detailed ways

The invention includes: a pressure relief device and a control method using the pressure relief device.

The pressure relief device includes: a slurry valve and a pressure monitor 11 ; both the slurry valve and the pressure monitor 11 are installed on the main pipeline 25 .

The pressure monitor 11 includes: a piston 12, a sleeve 13, a plug 14, a shock-resistant pressure gauge 15, a quick-sealing joint 16, a tee 17 and a pressure sensor interface 18; one end of the sleeve 13 is fixedly connected to the main pipeline 25 The other end is connected with a plug 14; there is a piston 12 on the sleeve 13, and there is a seal on the side wall of the piston 12 and the plug 14, which is located between the contact surface with the sleeve 13; there is a quick seal on the plug 14 The interface of the joint 16, the quick seal joint 16 is connected between the plug 14 and the tee 17, and the other two ports of the tee 17, one port is connected with a shock-resistant pressure gauge 15, and the other port is a pressure sensor interface 18. A pressure sensor is connected to the sensor interface 18 .

The slurry valve includes: valve body 1, sealing head 2, sleeve 3, inner cylinder body 4, clamp 5, No. 1 oil inlet and outlet joint 6, connecting cylinder 7, outer cylinder body 8, end cover 9, mandrel 10. Lifting lugs 19, first cavity 20, second cavity 21, third cavity 22, No. 2 oil inlet and outlet joints 23, slurry outlet 24;

There is a slurry outlet 24 on the side wall of the valve body 1; one end of the valve body 1 is fixedly connected to the main pipe 25, and the other end of the valve body 1 is connected with the outer cylinder block 8 through the clamp 5, and is behind the outer cylinder block 8. The end is connected with an end cover 9, there is a through hole in the end cover 9, a No. 2 oil inlet and outlet joint 23 is connected to the through hole of the end cover 9, and the inner cavity of the outer cylinder block 8 in the through hole of the end cover 9 is the third cavity 22; There is a No. 1 oil inlet and outlet joint 6 on the outer cylinder block 8, and the No. 1 oil inlet and outlet joint 6 is located at the position of the second cavity 21;

There is a sleeve 3 and an inner cylinder 4 in the valve body 1; a sealing head 2 is arranged in the sleeve 3, a connecting cylinder 7 is connected to the rear end of the inner cylinder 4, and an inner core shaft 10 is connected to the inner end of the connecting cylinder 7, Both the connecting cylinder 7 and the mandrel 10 are located in the inner cylinder block 4; the inner cylinder block 4 has an oil passage hole, one end of the oil passage hole is located at the position of the second cavity 21, and the other end of the oil passage hole is an oil inlet and outlet port It is located at the position of the first cavity 20; the first cavity 20 is located in the cavity between the inner cylinder 4 and the mandrel 10; the sealing head 2 is sealed and slid in the valve body 1 and the sleeve 3; the rear of the inner cylinder 4 is outside The inner cylinder body 8 is sealed and slid, and the front end is located in the valve body 1;

Control method using pressure relief device:

By controlling the two oil inlet and outlet ports of No. 1 oil inlet and outlet joint 6 and No. 2 oil inlet and outlet joint 23, the opening or closing of the drain valve is realized, and the remote and on-site pipeline pressure monitoring is realized through the pressure sensor, and the remote and on-site drain valve is realized. The double operation improves the safety of the filling pipeline system;

The valve body 1 is connected to the main pipeline 25, and is sealed with the sealing head 2 in the direction of the outer cylinder body 8 by a U-shaped sealing ring, which ensures the tightness of the entire pipeline; when the stop valve in front of the main pipeline 25 is in the cut-off state or the pressure When it is too large, the sealing head 2 is pushed to the rear, the slurry opening 24 communicates with the main pipeline 25, and the slurry in the main pipeline 25 is discharged along the bypass slurry opening 24;

The mandrel 10 and the sealing head 2 are threadedly connected, and the mandrel 10 and the inner cylinder liner 4 are sealed in the form of U-shaped and combined sealing. When the No. 1 oil inlet and outlet joint 6 enters oil, the hydraulic oil enters the first cavity 20 and pushes the core The shaft 10 moves and drives the sealing head 2 to move at the same time, the sealing head 2 enters the sleeve 3, and the sealing of the sealing head 2 is protected by the sleeve 3, and then moves together with the inner cylinder sleeve 4 to open the drain port 24;

The connecting cylinder 7 is connected with the inner cylinder liner 4 by threads, and the oil inlet and outlet are opened in the middle, so that the first cavity 20 and the second cavity 21 are communicated. When the inner cylinder liner 4 is in place, the hydraulic oil in the second cavity 21 will push the mandrel 10 to move, thereby pushing the sealing head 2 out of the sleeve 3 and sealing the valve body 1 .

In order to more clearly illustrate the present invention or the technical solutions in the prior art, the following will briefly describe the accompanying drawings used in the description of the present invention or the prior art. Obviously, the accompanying drawings in the following description are only the present invention. For some embodiments of the present invention, for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

The embodiments of the present invention will be further described below with reference to the accompanying drawings.

Example 1: As shown in Figure 1, a pressure gauge 15 and electronic control monitoring are set in the monitoring paste filling pipeline pressure and the main pipeline of the pressure relief device, multiple seals are used to avoid high pressure leakage, and the valve body 1 and the outer cylinder body 8 are clamped 5 is connected to facilitate installation and on-site inspection and maintenance, and the valve body 1 is provided with lifting lugs 19 to facilitate lifting.

Figure 2 shows the monitoring of the pressure of the paste filling pipeline and the state when the pressure relief device is completely closed. It can be seen that the sealing head 2 adopts multiple seals to ensure the sealing effect, and the larger end area of the third cavity 22 produces sufficient The pressure ensures the long-distance transportation of the main pipeline 25 .

Figure 3 shows that when the oil inlet of the No. 1 oil inlet and outlet joints is filled with oil, the sealing head 2 is returned to the state of the sleeve 3, which prevents the sealing head 2 from contacting the slurry, which protects the sealing head 2 and the seal, and improves the Service life and sealing effect.

Figure 4 shows the monitoring of the pressure of the paste filling pipeline and the state when the pressure relief device is fully opened. If the main pipeline 25 is blocked and the pipeline pressure is too large, the slurry valve will automatically open so that the slurry is discharged through the slurry outlet 24. Protect the safety of the entire pipeline. If the pipeline is smooth and the filling needs to be stopped immediately for some reason, it can be used in conjunction with the stop valve, the stop valve is closed immediately, and the slurry valve is opened to discharge the slurry in the pipeline.

Claims (4)

1. A pressure relief device for monitoring the pressure of a paste filling pipeline, characterized in that: the pressure relief device comprises: a slurry valve and a pressure monitor; both the slurry valve and the pressure monitor are installed on the main pipeline. 2 . The pressure relief device for monitoring the pressure of the paste filling pipeline according to claim 1 , wherein the pressure monitor comprises: a piston, a sleeve, a plug, a shock-resistant pressure gauge, and a quick-seal joint. 3 . , tee and pressure sensor interface; one end of the sleeve is fixedly connected to the main pipeline, and the other end is connected with a plug; there is a piston in the sleeve, and there is a seal on the side wall of the piston and the plug, which is located between the contact surface of the sleeve and the sleeve. There is a quick-sealing joint interface on the plug, the quick-sealing joint is connected between the plug and the tee, and the other two ports of the tee, one port is connected with a shock-resistant pressure gauge, and the other port is a pressure sensor interface, A pressure sensor is connected to the pressure sensor interface. 3. The pressure relief device for monitoring the pressure of the paste filling pipeline according to claim 1, wherein the slurry valve comprises: a valve body, a sealing head, a sleeve, an inner cylinder, a clamp, a No. 1 oil inlet and outlet joint, connecting cylinder, outer cylinder body, end cover, mandrel, lifting lug, first cavity, second cavity, third cavity, No. 2 oil inlet and outlet joint, drain port; in the valve body There is a slurry outlet on the side wall of the valve body; one end of the valve body is fixedly connected to the main pipeline, the other end of the valve body is connected to the outer cylinder body through a clamp, an end cover is connected to the rear end of the outer cylinder body, and there is a through hole in the end cover , the No. 2 oil inlet and outlet joints are connected to the through holes of the end cover, and the inner cavity of the outer cylinder in the through holes of the end cover is the third cavity; there is a No. 1 oil inlet and outlet joint on the outer cylinder body, and the No. Two-chamber position; There is a sleeve and an inner cylinder in the valve body; there is a sealing head in the sleeve, a connecting cylinder is connected to the rear end of the inner cylinder, and an inner mandrel is connected to the inner end of the connecting cylinder, and both the connecting cylinder and the mandrel are located in the inner cylinder. Inside; there is an oil passage hole on the inner cylinder body, one end of the oil passage hole is located at the position of the second cavity, and the other end of the oil passage hole is located at the position of the first cavity; the first cavity is located in the inner cylinder body The cavity between the mandrel and the mandrel; the sealing head seals and slides in the valve body and the sleeve; the rear of the inner cylinder seals and slides in the outer cylinder, and the front end is located in the valve body; the mandrel seals and slides in the inner cylinder, and the front end of the mandrel Push the seal head to seal the slide. 4. adopt the control method of a kind of monitoring paste filling pipeline pressure pressure relief device according to claim 1, it is characterized in that: adopt the control method of the pressure relief device: By controlling the two oil inlet and outlet ports of No. 1 oil inlet and outlet joint and No. 2 oil inlet and outlet joint, the opening or closing of the drain valve is realized. The remote and on-site pipeline pressure monitoring is realized through the pressure sensor, and the remote and on-site dual control of the drain valve is realized. Operation improves the safety of the filling piping system; The valve body is connected with the main pipeline, and the sealing head is sealed with a U-shaped sealing ring in the direction of the outer cylinder body, which ensures the tightness of the whole pipeline; when the stop valve in front of the main pipeline is in the cut-off state or the pressure of the main pipeline is too large, the sealing head Pushed to the rear, the slurry outlet is communicated with the main pipeline, and the slurry in the main pipeline is discharged along the slurry outlet of the bypass; The mandrel and the sealing head are threadedly connected, and the mandrel and the inner cylinder liner are sealed in the form of U-shaped and combined sealing. When the No. 1 oil inlet and outlet joints enter the oil, the hydraulic oil enters the first cavity, pushes the mandrel to move and drives the sealing head At the same time, the sealing head enters the sleeve, and the sealing of the sealing head is protected by the sleeve, and then moves together with the inner cylinder sleeve to open the slurry opening; The connecting cylinder and the inner cylinder liner are connected by thread, and the oil inlet and outlet are opened in the middle, so that the first cavity and the second cavity are connected. The hydraulic oil in the rear second chamber will push the mandrel to move, thereby pushing the sealing head out of the sleeve and sealing the valve body.

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