Leakage-proof safety protection device for chemical pipeline

Abstract

The invention relates to the technical field of chemical pipeline safety protection, and provides a chemical pipeline leakproof safety protection device which is arranged at the two ends of a main chemical pipeline in a communicating mode and comprises a two-way feeding flow guide mechanism, a two-way discharging flow guide mechanism and an auxiliary chemical pipeline. The two-way feeding flow guide mechanism and the two-way discharging flow guide mechanism are both used for cutting off and reversing conveyed materials, and the two-way feeding flow guide mechanism and the two-way discharging flow guide mechanism are each provided with a main feeding hole, an auxiliary feeding hole, a main discharging hole and an auxiliary discharging hole which are used for conveying the materials. The two ends of the chemical main pipeline are arranged between the main feeding hole in the two-way feeding flow guide mechanism and the main discharging hole in the two-way discharging flow guide mechanism in a communicating mode through the pressure measuring pipe sets. By means of the technical scheme, the problem that in the prior art, when a chemical pipeline leaks or is replaced, material conveying needs to be stopped immediately, and material conveying is affected is solved.

Description

Technical Field

[0001] The present invention relates to the technical field of chemical pipeline safety protection, and specifically, to a chemical pipeline anti-leakage safety protection device. Background Art

[0002] In the process of chemical production, as a key carrier for material transportation, the safety of pipelines is of crucial importance. Since chemical materials often have characteristics such as corrosiveness, flammability, and explosiveness, once cracks or leaks occur in the pipelines, it will not only cause material waste but also may trigger serious safety accidents, posing a huge threat to human life and the environment.

[0003] Traditional chemical pipelines usually have a single-pipe structure. When a pipeline leaks, it is mostly necessary to immediately stop material transportation for repair or replacement, which will lead to the interruption of transportation and cause economic losses. Although there are some existing protection measures, such as increasing the pipeline wall thickness and using corrosion-resistant materials, the problem of not affecting material transportation when the pipeline leaks still cannot be fundamentally solved. Summary of the Invention

[0004] The present invention provides a chemical pipeline anti-leakage safety protection device to solve the problem that in the prior art, when a chemical pipeline leaks or needs to be replaced, it is mostly necessary to immediately stop material transportation, which affects material transportation.

[0005] The technical solution of the present invention is as follows: A chemical pipeline anti-leakage safety protection device is connected and arranged at both ends of a chemical main pipeline, and includes a double-pass feed diversion mechanism, a double-pass discharge diversion mechanism, and a chemical sub-pipeline;

[0006] Both the double-pass feed diversion mechanism and the double-pass discharge diversion mechanism are used to cut off and reverse the transported materials;

[0007] Both the double-pass feed diversion mechanism and the double-pass discharge diversion mechanism are provided with a main feed hole, a secondary feed hole, a main discharge hole, and a secondary discharge hole for material transportation;

[0008] Both ends of the chemical main pipeline are connected and arranged between the main feed hole on the double-pass feed diversion mechanism and the main discharge hole on the double-pass discharge diversion mechanism through a pressure measurement pipe group;

[0009] The chemical sub-pipeline is arranged side by side on one side of the chemical main pipeline, and a material blocking slider is hermetically and slidably arranged in the chemical sub-pipeline;

[0010] One end of the chemical sub-pipeline is connected and arranged on the secondary discharge hole of the double-pass feed diversion mechanism through a position measurement pipe group for detecting the position of the material blocking slider;

[0011] The other end of the chemical by-pass pipe is connected to the auxiliary feed hole provided on the double-pass discharge guiding mechanism through a stopper position adjusting pipe group, and is used to adjust the position of the material blocking slider.

[0012] As a preferred technical solution of the present invention, the material blocking slider divides the inside of the chemical by-pass pipe into a material storage cavity and a position adjusting cavity. The material storage cavity is communicated with the position measuring pipe group, and the position adjusting cavity is communicated with the stopper position adjusting pipe group;

[0013] A pressure regulating mechanism is communicated between the position measuring pipe group and the adjacent pressure measuring pipe group, and is used to temporarily discharge the material in the chemical main pipe into the chemical by-pass pipe to relieve the pressure of the chemical main pipe;

[0014] The pressure regulating mechanism includes a pressure relief pipe group and a pressurizing component;

[0015] The pressure relief pipe group is communicated between the position measuring pipe group and the pressure measuring pipe group, and is used to guide the material in the chemical main pipe into the chemical by-pass pipe;

[0016] The pressurizing component is communicated between the position measuring pipe group and the pressure measuring pipe group, and is used to pump the material in the chemical by-pass pipe into the chemical main pipe.

[0017] As a preferred technical solution of the present invention, the double-pass feed guiding mechanism and the double-pass discharge guiding mechanism have the same structure. The double-pass feed guiding mechanism and the double-pass discharge guiding mechanism both include a guiding box, a guiding column and a guiding position adjusting component;

[0018] The main feed hole, the auxiliary feed hole, the main discharge hole and the auxiliary discharge hole are all opened on the guiding box. The main feed hole and the main discharge hole are on the same axis, and the auxiliary feed hole and the auxiliary discharge hole are on the same axis;

[0019] The guiding column is sealed and rotatably arranged in the guiding box. A guiding through hole is opened on the guiding column for controlling the flow direction of the material;

[0020] The guiding position adjusting component has a self-locking function. The guiding position adjusting component is arranged on the guiding box and is connected to the guiding column to drive the guiding column to rotate.

[0021] On the basis of the foregoing solution, further, the guiding position adjusting component includes an adjusting box, an adjusting rotating rod, an adjusting worm gear, an adjusting worm and an adjusting motor;

[0022] The adjusting box is arranged on the guiding box;

[0023] The adjusting rotating rod penetrates and is rotatably sealed on the adjusting box and the guiding box. One end of the adjusting rotating rod is connected to the guiding column;

[0024] The position-adjusting worm gear is arranged on the position-adjusting rotating rod;

[0025] The position-adjusting worm is rotatably arranged in the position-adjusting box, and the position-adjusting worm meshes with the position-adjusting worm gear;

[0026] The position-adjusting motor is installed on one side of the position-adjusting box, and the output end of the position-adjusting motor is connected to one end of the position-adjusting worm.

[0027] On the basis of the foregoing solution, the pressure measuring pipe group includes a pressure measuring pipeline and a pressure detection sensor;

[0028] The pressure measuring pipeline is communicatively arranged between the chemical main pipeline and the corresponding diversion box;

[0029] The pressure detection sensor is installed on the pressure measuring pipeline.

[0030] On the basis of the foregoing solution, the position measuring pipe group includes a position measuring pipeline and a position detection sensor;

[0031] The position measuring pipeline is communicatively arranged between the chemical auxiliary pipeline and the corresponding diversion box, and the material blocking slider can slide into the position measuring pipeline through the chemical auxiliary pipeline;

[0032] The position detection sensor is installed on the position measuring pipeline for detecting the position of the material blocking slider.

[0033] On the basis of the foregoing solution, the block position-adjusting pipe group includes a temporary storage blind pipe, a diversion elbow pipe, a pneumatic pressure regulating pipe, an air regulating valve, and a block position-adjusting cylinder;

[0034] The temporary storage blind pipe is communicatively arranged at the other end of the chemical auxiliary pipeline, and the material blocking slider can slide into the temporary storage blind pipe through the chemical auxiliary pipeline;

[0035] The diversion elbow pipe is communicatively arranged between the diversion box and the temporary storage blind pipe. After the material blocking slider slides into the temporary storage blind pipe, the material can reach the diversion box through the chemical auxiliary pipeline, the temporary storage blind pipe, and the diversion elbow pipe;

[0036] The pneumatic pressure regulating pipe is communicatively arranged on the temporary storage blind pipe for discharging the gas in the position-adjusting cavity;

[0037] The air regulating valve is installed on the pneumatic pressure regulating pipe;

[0038] The block position-adjusting cylinder is installed on the side of the temporary storage blind pipe away from the chemical auxiliary pipeline, and the output end of the block position-adjusting cylinder penetrates into the temporary storage blind pipe.

[0039] Further based on the foregoing solution, the pressure relief pipe group includes a pressure relief pipeline and a pressure relief valve;

[0040] The pressure relief pipeline is communicatively connected between the measurement pipeline and the adjacent pressure measurement pipeline;

[0041] The pressure relief valve is installed on the pressure relief pipeline.

[0042] Further based on the foregoing solution, the pressurization assembly includes a pressurization pump and a check valve;

[0043] The pressurization pump is installed on the diversion box. The feed end of the pressurization pump is communicatively connected to the measurement pipeline, and the discharge end of the pressurization pump is communicatively connected to the pressure measurement pipeline;

[0044] The check valve is installed on the discharge end of the pressurization pump.

[0045] Further based on the foregoing solution, on the side of each diversion box away from the main chemical pipeline, a three-way confluence box is also communicatively connected. One of the three-way confluence boxes is communicatively connected to the main feed hole and the main discharge hole on the double-pass feed diversion mechanism, and the other three-way confluence box is communicatively connected to the main discharge hole and the secondary discharge hole on the double-pass discharge diversion mechanism.

[0046] The beneficial effects of the present invention are as follows:

[0047] 1. In the present invention, by setting up the double-pass feed diversion mechanism and the double-pass discharge diversion mechanism, the conveyed materials can be truncated and redirected. This function is crucial in the chemical pipeline system. When it is necessary to repair, detect, or respond to emergencies in the main chemical pipeline, the material flow can be truncated through these two mechanisms to avoid material leakage. At the same time, the materials can be guided to other paths to ensure the continuity of the production process and reduce the production downtime caused by pipeline maintenance or failures.

[0048] 2. In the present invention, by setting up the pressure measurement pipe group communicatively connected to the main chemical pipeline and installing the pressure detection sensor on the pressure measurement pipeline, the pressure condition inside the main chemical pipeline can be monitored in real time. When the pressure rises abnormally, the pressure relief pipe group can guide the materials in the main chemical pipe to the chemical secondary pipe for pressure relief treatment, and the pressurization assembly can pump the materials in the chemical secondary pipe into the main chemical pipe to restore the pressure when needed, effectively preventing pipeline rupture and leakage caused by excessive pressure and ensuring the safe and stable operation of the chemical pipeline system.

[0049] 3. In the present invention, by providing a diversion adjustment component with a self-locking function in the double-pass feed diversion mechanism and the double-pass discharge diversion mechanism, the adjustment motor drives the adjustment worm to rotate, thereby driving the adjustment worm gear and the adjustment rod, causing the diversion column to rotate to control the material flow direction. The self-locking function ensures that the diversion column will not rotate randomly due to external forces or other factors after being adjusted to the specified position, ensuring the stability and accuracy of the material flow direction, preventing leakage risks caused by incorrect material flow directions, and improving the reliability of the entire protection device. BRIEF DESCRIPTION OF THE DRAWINGS

[0050] The present invention will be further described in detail below with reference to the drawings and specific embodiments.

[0051] Figure 1 is a schematic structural diagram of the whole of the present invention;

[0052] Figure 2 for the present invention Figure 1 is a partial enlarged structural diagram at A in;

[0053] Figure 3 for the present invention Figure 1 is a partial enlarged structural diagram at B in;

[0054] Figure 4 is a schematic structural diagram of a partial cross-section of the double-pass feed diversion mechanism in the present invention;

[0055] Figure 5 for the present invention Figure 4 is a partial enlarged structural diagram at C in;

[0056] Figure 6 is a schematic structural diagram of the cooperation of the pressure measuring tube group, the position measuring tube group and the pressure relief tube group in the present invention;

[0057] Figure 7 is a schematic structural diagram of the block adjustment tube group in the present invention.

[0058] In the figure: 001, double-pass feed diversion mechanism; 002, double-pass discharge diversion mechanism; 003, pressure measuring tube group; 004, position measuring tube group; 005, block adjustment tube group; 006, pressure relief tube group; 007, pressurization component;

[0059] 1. Chemical main pipeline; 2. Chemical auxiliary pipeline; 3. Material blocking slider; 4. Diversion box; 5. Diversion column; 6. Position adjustment box; 7. Position adjustment rotating rod; 8. Position adjustment worm gear; 9. Position adjustment worm; 10. Position adjustment motor; 11. Pressure measurement pipeline; 12. Pressure detection sensor; 13. Position measurement pipeline; 14. Position detection sensor; 15. Temporary storage blind pipe; 16. Diversion elbow; 17. Air pressure adjustment pipe; 18. Air adjustment valve; 19. Block position adjustment cylinder; 20. Pressure relief pipeline; 21. Pressure relief valve; 22. Pressure charging pump; 23. Check valve; 24. Three-way confluence box. Detailed implementation manners

[0060] Next, in combination with the embodiments of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts fall within the scope of the present invention.

[0061] In Embodiment 1, as Figures 1 to 7 shown, a chemical pipeline anti-leakage safety protection device is proposed in this embodiment, which is connected in series at both ends of the chemical main pipeline 1 and includes a double-pass feeding diversion mechanism 001, a double-pass discharging diversion mechanism 002 and a chemical auxiliary pipeline 2.

[0062] Specifically, both the double-pass feeding diversion mechanism 001 and the double-pass discharging diversion mechanism 002 are used to cut off and reverse the conveyed materials. The double-pass feeding diversion mechanism 001 and the double-pass discharging diversion mechanism 002 are both provided with a main feeding hole, a secondary feeding hole, a main discharging hole and a secondary discharging hole for material conveyance. Both ends of the chemical main pipeline 1 are connected through a pressure measurement pipe group 003 between the main feeding hole on the double-pass feeding diversion mechanism 001 and the main discharging hole on the double-pass discharging diversion mechanism 002.

[0063] Among them, the double-pass feeding diversion mechanism 001 and the double-pass discharging diversion mechanism 002 have the same structure. The double-pass feeding diversion mechanism 001 and the double-pass discharging diversion mechanism 002 both include a diversion box 4, a diversion column 5 and a diversion position adjustment component. The main feeding hole, the secondary feeding hole, the main discharging hole and the secondary discharging hole are all opened on the diversion box 4. The main feeding hole and the main discharging hole are on the same axis, and the secondary feeding hole and the secondary discharging hole are on the same axis. The diversion column 5 is sealed and rotatably arranged in the diversion box 4. A diversion through hole is opened on the diversion column 5 to control the flow direction of the material. The diversion position adjustment component has a self-locking function. The diversion position adjustment component is arranged on the diversion box 4 and is connected to the diversion column 5 to drive the diversion column 5 to rotate.

[0064] Among them, the diversion and position adjustment assembly includes a position adjustment box 6, a position adjustment rotating rod 7, a position adjustment worm gear 8, a position adjustment worm 9, and a position adjustment motor 10. The position adjustment box 6 is arranged on the diversion box 4. The position adjustment rotating rod 7 penetrates and is rotatably arranged in the position adjustment box 6 and the diversion box 4 in a sealed manner. One end of the position adjustment rotating rod 7 is connected to the diversion column 5. The position adjustment worm gear 8 is arranged on the position adjustment rotating rod 7. The position adjustment worm 9 is rotatably arranged in the position adjustment box 6. The position adjustment worm 9 meshes with the position adjustment worm gear 8. The position adjustment motor 10 is installed on one side of the position adjustment box 6. The output end of the position adjustment motor 10 is connected to one end of the position adjustment worm 9.

[0065] On the side of each diversion box 4 away from the chemical main pipeline 1, a three-way confluence box 24 is also connected. One of the three-way confluence boxes 24 is connected to the main feed hole and the main discharge hole on the double-pass feed diversion mechanism 001, and the other three-way confluence box 24 is connected to the main discharge hole and the secondary discharge hole on the double-pass discharge diversion mechanism 002.

[0066] Among them, the pressure measurement pipe group 003 includes a pressure measurement pipeline 11 and a pressure detection sensor 12. The pressure measurement pipeline 11 is connected in a communicating manner between the chemical main pipeline 1 and the corresponding diversion box 4. The pressure detection sensor 12 is installed on the pressure measurement pipeline 11. The material pressure in the pressure measurement pipeline 11 can be detected through the pressure detection sensor 12.

[0067] Specifically, connect one of the three-way confluence boxes 24 on one side of the double-pass feed diversion mechanism 001 to the feeding equipment for discharging materials. After the materials are transported through one end of the three-way confluence box 24 into the diversion box 4 in the double-pass feed diversion mechanism 001 by the feeding equipment, start the position adjustment motor 10. The output end of the position adjustment motor 10 drives the position adjustment worm 9 to rotate. The rotation of the position adjustment worm 9 drives the position adjustment worm gear 8 to rotate. The rotation of the position adjustment worm gear 8 drives the position adjustment rotating rod 7 to rotate. The rotation of the position adjustment rotating rod 7 can drive the diversion column 5 to rotate. When the diversion through hole in the diversion column 5 is on the same axis as the main feed hole and the main discharge hole, the materials entering the diversion box 4 will flow along the pressure measurement pipeline 11 into the chemical main pipeline 1. Similarly, by adjusting the diversion column 5 in the double-pass discharge diversion mechanism 002, the materials in the chemical main pipeline 1 are discharged through another pressure measurement pipeline 11 and another three-way confluence box 24.

[0068] As described above, the chemical auxiliary pipeline 2 is arranged side by side on one side of the chemical main pipeline 1. A material blocking slider 3 is arranged in the chemical auxiliary pipeline 2 in a sealed and sliding manner. One end of the chemical auxiliary pipeline 2 is connected to the secondary discharge hole on the double-pass feed diversion mechanism 001 through a position measurement pipe group 004 for detecting the position of the material blocking slider 3. The other end of the chemical auxiliary pipeline 2 is connected to the secondary feed hole on the double-pass discharge diversion mechanism 002 through a blocking block position adjustment pipe group 005 for adjusting the position of the material blocking slider 3.

[0069] Among them, the material blocking slider 3 divides the chemical by-pass pipe 2 into a material storage cavity and a position adjustment cavity. The material storage cavity is communicated with the position measuring pipe group 004, and the position adjustment cavity is communicated with the block position adjustment pipe group 005. A pressure adjustment mechanism is communicated between the position measuring pipe group 004 and the adjacent pressure measuring pipe group 003, which is used to temporarily discharge the material in the chemical main pipe 1 into the chemical by-pass pipe 2 to relieve the pressure of the chemical main pipe 1. The pressure adjustment mechanism includes a pressure relief pipe group 006 and a pressure charging component 007. The pressure relief pipe group 006 is communicated between the position measuring pipe group 004 and the pressure measuring pipe group 003, which is used to guide the material in the chemical main pipe into the chemical by-pass pipe 2. The pressure charging component 007 is communicated between the position measuring pipe group 004 and the pressure measuring pipe group 003, which is used to pump the material in the chemical by-pass pipe 2 into the chemical main pipe 1.

[0070] Among them, the position measuring pipe group 004 includes a position measuring pipe 13 and a position detection sensor 14. The position measuring pipe 13 is communicated between the chemical by-pass pipe 2 and the corresponding diversion box 4. The material blocking slider 3 can slide into the position measuring pipe 13 through the chemical by-pass pipe 2. The position detection sensor 14 is installed on the position measuring pipe 13, which is used to detect the position of the material blocking slider 3.

[0071] Among them, the block position adjustment pipe group 005 includes a temporary storage blind pipe 15, a diversion elbow pipe 16, a pneumatic pressure adjustment pipe 17, an air adjustment valve 18 and a block position adjustment cylinder 19. The temporary storage blind pipe 15 is communicated at the other end of the chemical by-pass pipe 2. The material blocking slider 3 can slide into the temporary storage blind pipe 15 through the chemical by-pass pipe 2. The diversion elbow pipe 16 is communicated between the diversion box 4 and the temporary storage blind pipe 15. After the material blocking slider 3 slides into the temporary storage blind pipe 15, the material can pass through the chemical by-pass pipe 2, the temporary storage blind pipe 15 and the diversion elbow pipe 16 into the diversion box 4. The pneumatic pressure adjustment pipe 17 is communicated with the temporary storage blind pipe 15, which is used for discharging the gas in the position adjustment cavity. The air adjustment valve 18 is installed on the pneumatic pressure adjustment pipe 17. The block position adjustment cylinder 19 is installed on the side of the temporary storage blind pipe 15 away from the chemical by-pass pipe 2, and the output end of the block position adjustment cylinder 19 penetrates into the temporary storage blind pipe 15.

[0072] Specifically, when there is a leakage in the chemical main pipe 1 or it needs to be replaced after long-term use, by rotating the direction of the diversion column 5, the diversion through hole is aligned with the secondary feed hole and the secondary discharge hole, and the material is diverted into the chemical by-pass pipe 2. After the material enters the chemical by-pass pipe 2, the material will push the material blocking slider 3 to move towards the side of the block position adjustment pipe group 005. At this time, the air adjustment valve 18 is opened, and the gas in the position adjustment cavity is discharged through the pneumatic pressure adjustment pipe 17, so as to ensure the normal sliding of the material blocking slider 3. After the material blocking slider 3 moves into the temporary storage blind pipe 15, the material blocking slider 3 will seal one end of the pneumatic pressure adjustment pipe 17, and the material in the chemical by-pass pipe 2 will pass through the temporary storage blind pipe 15 and enter the diversion box 4 from the diversion elbow pipe 16, realizing the transportation of the material.

[0073] Example 2. On the basis of Example 1 of the present application, the following is further supplementary explanation:

[0074] As described above, the pressure relief pipe group 006 includes a pressure relief pipe 20 and a pressure relief valve 21. The pressure relief pipe 20 is communicatively connected between the measuring pipe 13 and the adjacent pressure measuring pipe 11, and the pressure relief valve 21 is installed on the pressure relief pipe 20.

[0075] As described above, the pressurization assembly 007 includes a pressurization pump 22 and a check valve 23. The pressurization pump 22 is installed on the diversion box 4. The feed end of the pressurization pump 22 is communicatively connected to the measuring pipe 13, and the discharge end of the pressurization pump 22 is communicatively connected to the pressure measuring pipe 11. The check valve 23 is installed on the discharge end of the pressurization pump 22.

[0076] Specifically, by setting the pressure measuring pipe group 003 to communicate with the chemical main pipe 1 and installing the pressure detection sensor 12 on the pressure measuring pipe 11, the pressure condition in the chemical main pipe 1 can be monitored in real time. When the pressure abnormally rises, the pressure relief valve 21 in the pressure relief pipe group 006 opens, and through the pressure relief pipe 20, the material in the chemical main pipe is guided into the chemical auxiliary pipe 2 for pressure relief treatment. The pressurization assembly 007 can pump the material in the chemical auxiliary pipe 2 into the chemical main pipe 1 when needed. By starting the pressurization pump 22 to pump, the pressure can be restored, effectively preventing pipeline rupture and leakage caused by excessive pressure.

[0077] During the actual process of conveying materials, a pressurization pump 22 suitable for the characteristics of the materials can be selected.

[0078] After the material blocking slider 3 moves into the temporary storage blind pipe 15, by starting the block position adjustment cylinder 19, the material blocking slider 3 can be moved back into the chemical auxiliary pipe 2 through the movement of the output end of the block position adjustment cylinder 19.

[0079] Supplementary explanation: When adjusting the pressure in the chemical main pipe 1, by detecting the position of the material blocking slider 3 through the position detection sensor 14, the minimum capacity in the storage cavity can be detected. After detecting the material blocking slider 3, without affecting the normal conveying of materials, it is necessary to fill a part of the material for restoring the pressure of the chemical main pipe 1 into the storage cavity. In actual use, in order to accurately control the capacity in the storage cavity, multiple position detection sensors 14 can be installed on the chemical auxiliary pipe 2 to detect the position of the material blocking slider 3.

[0080] Further supplementary description is as follows: One side of the air pressure regulating pipe 17 can be connected to an air pump. When the charging pump 22 fails due to some reason, the air pump can be used to fill gas into the displacement cavity, and the position of the baffle slider 3 in the chemical by-pass pipe 2 can be adjusted by increasing the air pressure in the displacement cavity, so as to realize the regulation of the pressure in the chemical main pipe 1. However, when the length of the chemical by-pass pipe 2 is too long, the regulation of the pressure in the chemical main pipe 1 will be relatively slow.

[0081] The above are only the preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A chemical pipeline anti-leakage safety protection device is connected and arranged at both ends of a main chemical pipeline (1), and is characterized in that, Including: A double-pass feed diversion mechanism (001), a double-pass discharge diversion mechanism (002) and a chemical by-pass pipe (2). Both the double-pass feed diversion mechanism (001) and the double-pass discharge diversion mechanism (002) are used to cut off and reverse the conveyed materials. The double-pass feed diversion mechanism (001) and the double-pass discharge diversion mechanism (002) are both provided with a main feed hole, a secondary feed hole, a main discharge hole and a secondary discharge hole for material conveyance. Both ends of the chemical main pipe (1) are connected through a pressure measuring pipe group (003) between the main feed hole provided on the double-pass feed diversion mechanism (001) and the main discharge hole provided on the double-pass discharge diversion mechanism (002). The chemical by-pass pipe (2) is arranged side by side on one side of the chemical main pipe (1). A material blocking slider (3) is hermetically and slidably arranged in the chemical by-pass pipe (2). One end of the chemical by-pass pipe (2) is connected through a position measuring pipe group (004) to the secondary discharge hole provided on the double-pass feed diversion mechanism (001) for detecting the position of the material blocking slider (3). The other end of the chemical by-pass pipe (2) is connected through a blocking block position adjusting pipe group (005) to the secondary feed hole provided on the double-pass discharge diversion mechanism (002) for adjusting the position of the material blocking slider (3).

2. The chemical pipeline anti-leakage safety protection device according to claim 1, wherein The material blocking slider (3) divides the inside of the chemical by-pass pipe (2) into a material storage cavity and a position adjusting cavity. The material storage cavity is communicated with the position measuring pipe group (004), and the position adjusting cavity is communicated with the blocking block position adjusting pipe group (005). A pressure regulating mechanism is connected between the position measuring pipe group (004) and the adjacent pressure measuring pipe group (003) for temporarily discharging the materials in the chemical main pipe (1) into the chemical by-pass pipe (2) to relieve the pressure of the chemical main pipe (1). The pressure regulating mechanism includes a pressure relief pipe group (006) and a pressure charging component (007). The pressure relief pipe group (006) is connected between the position measuring pipe group (004) and the pressure measuring pipe group (003) for guiding the materials in the chemical main pipe into the chemical by-pass pipe (2). The pressure charging component (007) is connected between the position measuring pipe group (004) and the pressure measuring pipe group (003) for pumping the materials in the chemical by-pass pipe (2) into the chemical main pipe (1).

3. The chemical pipeline anti-leakage safety protection device according to claim 2, characterized in that, The double-pass feeding and guiding mechanism (001) and the double-pass discharging and guiding mechanism (002) have the same structure. The double-pass feeding and guiding mechanism (001) and the double-pass discharging and guiding mechanism (002) both include a guiding box (4), a guiding column (5) and a guiding position-adjusting assembly. The main feeding hole, the secondary feeding hole, the main discharging hole and the secondary discharging hole are all formed in the guiding box (4). The main feeding hole and the main discharging hole are located on the same axis, and the secondary feeding hole and the secondary discharging hole are located on the same axis. The guiding column (5) is sealed and rotatably arranged in the guiding box (4). A guiding through hole is formed in the guiding column (5) for controlling the flow direction of materials. The guiding position-adjusting assembly has a self-locking function. The guiding position-adjusting assembly is arranged on the guiding box (4) and is connected to the guiding column (5) for driving the guiding column (5) to rotate.

4. The chemical pipeline anti-leakage safety protection device according to claim 3, characterized in that, The guiding position-adjusting assembly includes an adjusting box (6), an adjusting rotating rod (7), an adjusting worm gear (8), an adjusting worm (9) and an adjusting motor (10). The adjusting box (6) is arranged on the guiding box (4). The adjusting rotating rod (7) penetrates and is rotatably arranged in the adjusting box (6) and the guiding box (4) in a sealed manner. One end of the adjusting rotating rod (7) is connected to the guiding column (5). The adjusting worm gear (8) is arranged on the adjusting rotating rod (7). The adjusting worm (9) is rotatably arranged in the adjusting box (6). The adjusting worm (9) meshes with the adjusting worm gear (8). The adjusting motor (10) is installed on one side of the adjusting box (6). The output end of the adjusting motor (10) is connected to one end of the adjusting worm (9).

5. The chemical pipeline anti-leakage safety protection device according to claim 4, wherein, The pressure measuring pipe group (003) includes a pressure measuring pipeline (11) and a pressure detection sensor (12). The pressure measuring pipeline (11) is communicated and arranged between the chemical main pipeline (1) and the corresponding guiding box (4). The pressure detection sensor (12) is installed on the pressure measuring pipeline (11).

6. The chemical pipeline anti-leakage safety protection device according to claim 5, characterized in that, The position measuring pipe group (004) includes a position measuring pipeline (13) and a position detection sensor (14). The position measuring pipeline (13) is communicated and arranged between the chemical secondary pipeline (2) and the corresponding guiding box (4). The material blocking slider (3) can slide into the position measuring pipeline (13) through the chemical secondary pipeline (2). The position detection sensor (14) is installed on the position measuring pipeline (13) for detecting the position of the material blocking slider (3).

7. The chemical pipeline anti-leakage safety protection device according to claim 6, characterized in that, The stopper position - adjusting pipe group (005) includes a temporary storage blind pipe (15), a diversion elbow pipe (16), a pneumatic pressure - adjusting pipe (17), an air - adjusting valve (18), and a stopper position - adjusting cylinder (19). The temporary storage blind pipe (15) is communicatively connected to the other end of the chemical by - pipe (2). The material blocking slider (3) can slide into the temporary storage blind pipe (15) through the chemical by - pipe (2). The diversion elbow pipe (16) is communicatively connected between the diversion box (4) and the temporary storage blind pipe (15). After the material blocking slider (3) slides into the temporary storage blind pipe (15), the material can pass through the chemical by - pipe (2), the temporary storage blind pipe (15), and the diversion elbow pipe (16) into the diversion box (4). The pneumatic pressure - adjusting pipe (17) is communicatively connected to the temporary storage blind pipe (15) and is used for discharging the gas in the position - adjusting cavity. The air - adjusting valve (18) is installed on the pneumatic pressure - adjusting pipe (17). The stopper position - adjusting cylinder (19) is installed on the side of the temporary storage blind pipe (15) away from the chemical by - pipe (2), and the output end of the stopper position - adjusting cylinder (19) penetrates into the temporary storage blind pipe (15).

8. The chemical pipeline anti-leakage safety protection device according to claim 7, characterized in that, The pressure - relief pipe group (006) includes a pressure - relief pipe (20) and a pressure - relief valve (21). The pressure - relief pipe (20) is communicatively connected between the measurement pipe (13) and the adjacent pressure - measurement pipe (11). The pressure - relief valve (21) is installed on the pressure - relief pipe (20).

9. The chemical pipeline anti-leakage safety protection device according to claim 8, characterized in that, The pressurizing assembly (007) includes a pressurizing pump (22) and a one - way valve (23). The pressurizing pump (22) is installed on the diversion box (4). The feed end of the pressurizing pump (22) is communicatively connected to the measurement pipe (13), and the discharge end of the pressurizing pump (22) is communicatively connected to the pressure - measurement pipe (11). The one - way valve (23) is installed on the discharge end of the pressurizing pump (22).

10. The chemical pipeline anti-leakage safety protection device according to claim 9, characterized in that, On the side of each diversion box (4) away from the chemical main pipe (1), a three - way confluence box (24) is also communicatively connected. One of the three - way confluence boxes (24) is communicatively connected to the main feed hole and the main discharge hole on the double - pass feed diversion mechanism (001), and the other three - way confluence box (24) is communicatively connected to the main discharge hole and the secondary discharge hole on the double - pass discharge diversion mechanism (002).

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