CN210716323U - Liquid container assembly and corrosion-resistant fitting for liquid container - Google Patents

Abstract

The utility model provides a liquid container subassembly and be used for liquid container's anticorrosive accessory. Anticorrosive accessory includes: the protective sleeve is arranged at the position of the inlet and outlet of the liquid container and is fixedly connected with the liquid container, and the protective sleeve is provided with an axial through hole; the protecting sleeve is sleeved on the periphery of the flow channel pipe, and one end of the flow channel pipe penetrates through the axial through hole and then extends into the inner cavity of the liquid container; and the packing box assembly is arranged between the protective sleeve and the flow passage pipe so as to seal a gap between the inner wall surface of the protective sleeve and the outer wall surface of the flow passage pipe. The technical scheme of the utility model the relatively poor problem of corrosion resisting capability of the welding department in business turn over hole annex and the business turn over hole of liquid container among the prior art has been solved effectively.

Description

Liquid container assembly and corrosion-resistant fitting for liquid container

Technical Field

The utility model relates to an anticorrosive field of industry liquid container and pipeline particularly, relates to a liquid container subassembly and be used for liquid container's anticorrosive accessory.

Background

In the field of petrochemical industry, liquid containers mainly include tank-shaped pressure vessels such as medicament tanks, sewage tanks, oil storage tanks, and liquid containers are generally used for storing corrosive liquids such as chemical agents and petroleum. In the prior art, a pipe fitting serving as an accessory of an inlet/outlet hole is inserted into the inlet/outlet hole of a liquid container, and the outer wall surface of the pipe fitting is welded to the liquid container, wherein one end of the pipe fitting connected with the liquid container is located in the inlet/outlet hole or is flush with the inner wall surface of the liquid container. However, since the liquid is corrosive, when the liquid flows into the liquid container through the pipe, the liquid directly impacts the welding position, and leakage is likely to occur at the welding position. Once liquid leaks, only the accessories of the inlet and outlet holes can be replaced and then welded again, which is labor-consuming and time-consuming, and thus, the normal conveying or storage efficiency of the liquid medium is seriously influenced. Meanwhile, the leakage of corrosive liquid outside the liquid container has great potential safety hazard.

That is, in the prior art, since the pipe fitting as the attachment of the inlet/outlet hole is directly welded at the inlet/outlet hole of the liquid container, the corrosive liquid is in direct contact with the welding position when flowing into the liquid container, so that the corrosion resistance of the welding position is poor.

Disclosure of Invention

A primary object of the present invention is to provide an anti-corrosion fitting for a liquid container to solve the problem of poor corrosion resistance of the welding point of the inlet and outlet hole fittings and the inlet and outlet holes of the liquid container in the prior art.

In order to achieve the above object, according to one aspect of the present invention, there is provided an anticorrosive accessory for a liquid container, the anticorrosive accessory including: the protective sleeve is arranged at the position of the inlet and outlet of the liquid container and is fixedly connected with the liquid container, and the protective sleeve is provided with an axial through hole; the protecting sleeve is sleeved on the periphery of the flow channel pipe, and one end of the flow channel pipe penetrates through the axial through hole and then extends into the inner cavity of the liquid container; and the packing box assembly is arranged between the protective sleeve and the flow passage pipe so as to seal a gap between the inner wall surface of the protective sleeve and the outer wall surface of the flow passage pipe.

Further, the shield cover comprises: the first pipe body is arranged in the inlet and outlet hole; and the second pipe body is connected with the first pipe body, the outer diameter of the second pipe body is larger than that of the first pipe body, a step surface is formed at the joint of the second pipe body and the first pipe body, and the step surface is in butt contact with the inner wall surface of the liquid container.

Further, the packing box subassembly includes: the packing box is arranged on the periphery of the flow channel pipe, and at least one part of the packing box is positioned in the axial through hole of the protective sleeve; and the packing is arranged on the periphery of the flow passage pipe and is positioned in the packing box so as to seal a gap between the inner wall surface of the packing box and the partial outer wall surface of the flow passage pipe.

Further, anticorrosive accessory still includes the gland that is used for compressing tightly the packing in the packing box, and the gland cover is established in the periphery of runner pipe.

Further, the packing box subassembly still includes the packing flange of being connected with the packing box, and the packing flange setting is in the one end of keeping away from liquid container of packing box, and the periphery at the runner pipe is established to the packing flange cover, and the packing flange has the flange through-hole that supplies the packing box to wear out, thereby gland and packing flange joint compress tightly the packing in the packing box.

Further, the corrosion prevention fitting further comprises a joint which is detachably connected with one end of the runner pipe located in the inner cavity of the liquid container.

Furthermore, the joint comprises a diameter-reducing pipe section and a flat pipe section connected with the diameter-reducing pipe section, the flat pipe section comprises two flat plates arranged oppositely and an arc-shaped plate connected with the two flat plates, and the two flat plates and the arc-shaped plate surround to form an injection hole.

Furthermore, the joint also comprises a connecting pipe section connected with the reducing pipe section, and the joint is connected with the runner pipe through the connecting pipe section.

Further, the corrosion prevention fitting further includes a connection flange provided at an outer periphery of the flow passage pipe, the connection flange being movably provided in an axial direction of the flow passage pipe.

Further, the packing box subassembly includes: the packing box is arranged on the periphery of the flow channel pipe, at least one part of the packing box is positioned in the axial through hole of the protective sleeve, and the packing flange is connected with the packing box and is arranged at one end of the packing box, which is far away from the liquid container, and the packing flange is sleeved on the periphery of the flow channel pipe; wherein, anticorrosive accessory is still including setting up flange and the gasket in the periphery of flow channel pipe, and the gasket is located between packing flange and the flange.

According to another aspect of the present invention, there is provided a liquid container assembly, comprising a liquid container having a plurality of access holes, the liquid container assembly further comprising an anti-corrosion fitting disposed at least one of the access holes, the anti-corrosion fitting being the above-mentioned anti-corrosion fitting.

By applying the technical scheme of the utility model, corrosive liquid enters the inner cavity of the liquid container through the runner pipe, and because one end of the runner pipe extends into the inner cavity of the liquid container, namely a certain interval is arranged between the end of the runner pipe extending into the liquid container and the side wall where the inlet and outlet hole of the liquid container is positioned, thus, the corrosive liquid flowing out of the runner pipe does not directly impact the connecting position of the protective sleeve and the liquid container, and the connecting position is not easy to leak; furthermore, due to the arrangement of the protective sleeve, the thickness of a connecting area between the flow passage pipe and the inner wall of the inlet and outlet hole of the liquid container is increased, and the leakage period of the connecting area caused by corrosion is delayed, so that the corrosion resistance of the connecting area is improved.

Drawings

The accompanying drawings, which form a part of the present application, are included to provide a further understanding of the invention, and are incorporated in and constitute a part of this specification, illustrate embodiments of the invention and together with the description serve to explain the invention and not to limit the invention. In the drawings:

fig. 1 shows a schematic view of an exploded structure of a first embodiment of a corrosion protection fitting for a liquid container according to the present invention;

FIG. 2 shows a schematic view of the corrosion protection fitting of FIG. 1 mated with a liquid container (wherein the corrosion protection fitting is adapted to be installed at an inlet of the liquid container);

FIG. 3 shows a cross-sectional view of the corrosion protection fitting of FIG. 2 mated with a liquid container; and

fig. 4 shows a schematic structural view of a second embodiment of the corrosion prevention fitting for a liquid container according to the present invention (wherein the corrosion prevention fitting is adapted to be installed at an outlet position of the liquid container).

Wherein the figures include the following reference numerals:

1. a protective sleeve; 11. a first pipe body; 12. a second tube body; 13. a step surface; 14. a first internal thread; 21. a packing box; 211. a first axial bore; 212. a second axial bore; 213. a second external thread; 22. packing; 23. a packing flange; 231. an axial through hole; 3. a runner pipe; 31. an annular boss; 32. a first external thread; 4. a gland; 41. a flange plate; 42. a third tube; 5. a joint; 51. reducing the diameter of the pipe section; 52. a flat tube section; 53. an injection hole; 54. connecting the pipe sections; 6. a connecting flange; 7. a gasket; 8. a liquid container.

Detailed Description

It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict. The present invention will be described in detail below with reference to the accompanying drawings in conjunction with embodiments.

It is noted that, unless otherwise indicated, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs.

In the present application, where the contrary is not intended, the use of directional words such as "upper, lower, top and bottom" is generally with respect to the orientation shown in the drawings, or with respect to the component itself in the vertical, perpendicular or gravitational direction; likewise, for ease of understanding and description, "inner and outer" refer to the inner and outer relative to the profile of the components themselves, but the above directional words are not intended to limit the invention.

The utility model discloses an in the embodiment of the utility model, liquid container 8 mainly indicates ordinary pressure liquid mixing container, and this ordinary pressure liquid mixing container has the inner chamber, with two business turn over holes of inner chamber intercommunication and with the opening of inner chamber intercommunication, and one of them business turn over hole is arranged in liquid entering inner chamber, and another business turn over hole is arranged in liquid from the inner chamber outflow. A liquid medium with relatively strong corrosiveness (such as a liquid medium with strong acidity or strong alkalinity) flows in from one inlet and outlet of the liquid container 8, and is mixed with other liquid media (such as water or other weak corrosiveness media) in the inner cavity of the liquid container 8. The mixed liquid medium has reduced corrosivity, and flows out of the other inlet/outlet hole of the liquid container 8 after standing in the liquid container 8 for a certain period of time.

As shown in fig. 1 to 4, in the embodiment of the present invention, the anti-corrosion fitting includes a protective sleeve 1, a runner pipe 3, and a packing box assembly. The protecting sleeve 1 is arranged at an inlet and outlet hole of the liquid container 8 and is fixedly connected with the liquid container 8, and the protecting sleeve 1 is provided with an axial through hole; the protecting sleeve 1 is sleeved on the periphery of the flow channel pipe 3, and one end of the flow channel pipe 3 penetrates through the axial through hole and then extends into the inner cavity of the liquid container 8; the packing box assembly is arranged between the protective sleeve 1 and the flow passage pipe 3 to seal a gap between the inner wall surface of the protective sleeve 1 and the outer wall surface of the flow passage pipe 3.

According to the arrangement, one end of the flow channel pipe 3 penetrates through the axial through hole of the protective sleeve 1 and then extends into the inner cavity of the liquid container 8, namely, a certain interval is formed between one end of the flow channel pipe 3 extending into the inner cavity of the liquid container 8 and the side wall, provided with the inlet and outlet holes, of the liquid container 8, so that corrosive liquid flowing out of the flow channel pipe 3 does not directly impact the connecting position of the protective sleeve 1 and the liquid container 8, and therefore the connecting position is not prone to leakage; furthermore, the protective sleeve 1 is fixedly connected with the liquid container 8, namely the protective sleeve 1 is directly welded at the position of the inlet and outlet hole of the liquid container 8, which is equivalent to increase the thickness of the connecting area between the inner walls of the inlet and outlet hole of the flow channel pipe 3 and the liquid container 8, thus delaying the leakage period of the connecting area due to corrosion, and preventing the corrosive liquid from directly impacting the welding position of the inlet and outlet hole accessory and the liquid container 8 to cause the leakage phenomenon in the prior art, thereby improving the corrosion resistance of the connecting area.

As shown in fig. 1 to 4, in an embodiment of the present invention, the protective sheath 1 includes a first tube 11 and a second tube 12. At least part of the first pipe body 11 is arranged in the inlet and outlet hole, the outer diameter of a second pipe body 12 connected with the first pipe body 11 is larger than that of the first pipe body 11, a step surface 13 is formed at the joint of the second pipe body 12 and the first pipe body 11, and the step surface 13 is in abutting contact with the inner wall surface of the liquid container 8.

According to the above arrangement, when the protector 1 is inserted into the inlet/outlet hole of the liquid container 8 from the inner cavity of the liquid container 8, the step surface 13 is in abutting contact with the inner wall surface of the liquid container 8, so that the step surface 13 can limit the depth of insertion of the first tube 11 into the inlet/outlet hole, and at the same time, the first tube 11 is made to coincide with the central axis of the inlet/outlet hole, thereby ensuring the mounting accuracy of the protector 1. Because the protective sleeve 1 is welded and fixed at the position of the access hole of the liquid container 8 after the protective sleeve is installed, the step surface 13 further ensures the welding precision of the protective sleeve 1 and the liquid container 8, so that the protective sleeve 1 can be correctly welded at the position of the access hole of the liquid container 8 according to the preset welding process flow, and a correct initial installation position is provided for the subsequent installation of other anticorrosive accessories, thereby ensuring the normal work of the anticorrosive accessories.

Preferably, the first tube 11 and the second tube 12 are made of stainless steel tubes with different outer diameters, and the first tube 11 and the second tube 12 are welded into a whole, so that the manufacturing cost of the protective sleeve 1 is greatly reduced, and the mechanical strength of the protective sleeve 1 is improved.

Of course, in an alternative embodiment not shown in the drawings, it is also possible to make the protective sleeve 1 from a first tubular body 11 and a second tubular body 12 having the same outer diameter, but to design corresponding welding tools to ensure that they can be welded correctly at the access opening of the liquid container 8 according to the preset welding process requirements. To save costs, the first tube 11 and the second tube 12 can be made of standard parts.

As shown in fig. 1 to 4, in the embodiment of the present invention, the packing box assembly includes a packing box 21 and a packing 22. Wherein, packing box 21 sets up in the periphery of flow path pipe 3, and at least some packing box 21 is located the axial through-hole of lag 1, and packing 22 sets up in the periphery of flow path pipe 3, and packing 22 is located packing box 21 in order to seal the clearance between the internal wall face of packing box 21 and the partial outer wall face of flow path pipe 3.

Specifically, packing box 21 is the tube body structure, and tube body structure's periphery is provided with second external screw thread 213, and second external screw thread 213 is connected the cooperation with the first internal thread 14 that sets up on the inner wall of lag 1, makes things convenient for anticorrosive accessory to dismantle the change from the access hole department of liquid container 8 like this to the availability factor of anticorrosive accessory has been improved. It should be noted that the raw rubber tape is wound around the screw-fitting portion of the packing box 21 and the packing case 1, so that the raw rubber tape can seal the gap of the screw-fitting, thereby preventing the liquid in the liquid container 8 from leaking. The packing box 21 has a first axial hole 211 and a second axial hole 212 communicating with the first axial hole 211, and the flow passage pipe 3 can pass through the packing box 21 through the first axial hole 211 and the second axial hole 212. Thus, an annular chamber for mounting the packing 22 is formed between the flow passage pipe 3 and the packing box 21.

Preferably, the packing 22 is a fragrant Loran packing which has good wear resistance and corrosion resistance, is widely applied to paper making, chemical industry and food industry which is uncomfortable to graphite components, and is suitable for mediums such as acid, alkali, organic solvent, oil, fuel and the like.

As shown in fig. 1 to 4, in the embodiment of the utility model, the packing box subassembly still includes the packing flange 23 of being connected with packing box 21, and packing flange 23 sets up the one end of keeping away from liquid container 8 at packing box 21, and the periphery at runner pipe 3 is established to 23 covers of packing flange, and packing flange 23 has the flange through-hole that supplies packing box to wear out, thereby gland 4 compresses tightly packing 22 in packing box 21 with packing flange 23 connection.

As shown in fig. 1 to 4, in the embodiment of the present invention, the anti-corrosion fitting further includes a gland 4 for compressing the packing 22 in the packing box 21, and the gland 4 is sleeved on the periphery of the runner pipe 3.

According to the above arrangement, the packing 22 can be pressed into the annular cavity formed between the flow passage pipe 3 and the packing box 21 by the pressing cover 4, and further, under the action of external force, the pressing cover 4 continues to apply pressure to the packing 22 to make it expand under pressure and expand to fill the entire annular cavity, so that the packing 22 can seal the gap between the inner wall surface of the packing box 21 and the partial outer wall surface of the flow passage pipe 3, thereby preventing the liquid in the liquid container 8 from leaking.

Specifically, packing flange 23 and packing box 21 welded connection, and the axis coincidence of the axis of packing flange 23 and packing box 21 is provided with axial through hole 231 on packing flange 23, is provided with a plurality of evenly distributed's bolted connection hole along circumference on packing flange 23, and a plurality of bolted connection holes set up around axial through hole 231. The gland 4 matched with the packing flange 23 and the packing box 21 comprises a flange plate 41 and a third pipe body 42, wherein a plurality of bolt connecting holes which are uniformly distributed along the circumferential direction are formed in the flange plate 41, the hole diameter of each bolt connecting hole is the same as that of the bolt connecting hole of the packing flange 23, and the distribution circle diameter of each bolt connecting hole is the same as that of the bolt connecting hole of the packing flange 23. The third pipe 42 is welded to one end of the flange 41, and the axis of the third pipe 42 coincides with the axis of the flange 41. The third tube 42 is inserted through the axial hole 231 of the packing flange 23 and presses the packing 22 into the first axial hole 211 of the packing box 21. Further, bolt connection holes of the alignment flange 41 and the packing flange 23 are penetrated with bolts, and nuts are correspondingly installed. By tightening the nut, the flange 41 is brought into contact with the end face of the packing flange 23, so that the third tube 42 can press the packing 22 completely into the first axial hole 211. Further, a certain torque force is applied to the nut, so that the flange 41 is completely attached to the end face of the packing flange 23, the third pipe 42 continues to apply pressure to the packing 22, the packing 22 is expanded under pressure, and thus the packing 22 can seal a gap between the inner wall surface of the packing box 21 and a part of the outer wall surface of the flow passage pipe 3, thereby preventing liquid in the liquid container 8 from leaking.

Of course, in an alternative embodiment not shown in the drawings, the flange 41 may be completely engaged with the end surface of the packing flange 23 by a clip connection, so that the packing 22 is compressed and expanded to seal the gap between the inner wall surface of the packing box 21 and a part of the outer wall surface of the flow passage pipe 3, thereby preventing the liquid in the liquid container 8 from leaking.

As shown in fig. 1 to 4, in the embodiment of the present invention, the corrosion prevention fitting further includes a joint 5, and the joint 5 is detachably connected to an end of the runner pipe 3 located in the inner cavity of the liquid container 8. According to the setting, the detachable connection mode is convenient for the quick disassembly and replacement of the joint 5, thereby avoiding the occurrence of the condition that the maintenance cost of the anti-corrosion fittings is higher due to the integral design of the joint 5 and the runner pipe 3. In addition, the adapter 5 with different specifications can be adapted according to the size of the inner cavity of the liquid container 8, so that the adaptability and the compatibility of the connection of the adapter 5 and the runner pipe 3 are improved.

Specifically, the joint 5 is internally provided with an internal second internal thread, and one end of the runner pipe 3 is provided with a first external thread 32, which are engaged with each other, so that the joint 5 is detachably connected to the end of the runner pipe 3.

Of course, in an alternative embodiment not shown in the drawings, the connection of the joint 5 to the runner pipe 3 may be in the form of a detachable connection such as a clip or a ferrule.

As shown in fig. 1 to 3, in the embodiment of the present invention, the joint 5 includes a diameter-reduced pipe section 51 and a flat pipe section 52 connected to the diameter-reduced pipe section, the flat pipe section 52 includes two flat plates disposed opposite to each other and an arc plate connecting the two flat plates, and the two flat plates and the arc plate define the injection hole 53.

According to the setting, connect 5 can be with the inside of spraying liquid container 8 of corrosive liquids homodisperse, both avoided corrosive liquids direct contact liquid container 8's inner wall, can reduce the impact force of liquid to the container inner wall again, like this, slowed down corrosive liquids to container inner wall and 8 business turn over holes of liquid container and the regional corrosion resistance of the connection of lag 1, thereby improved container inner wall and 8 business turn over holes of liquid container and lag 1's the regional corrosion resisting ability, prolonged its life.

Specifically, as shown in fig. 3, the joint 5 includes a reduced diameter pipe section 51, a flat pipe section 52, and a connecting pipe section 54. Wherein, one end of the reducing pipe section 51 is connected with the connecting pipe section 54, the other end of the reducing pipe section 51 opposite to the connecting pipe section is connected with the flat pipe section 52, and the connecting pipe section 54 is in threaded connection with one end of the flow channel pipe 3 extending into the inner cavity of the liquid container 8. The flat pipe section 52 includes two flat plates disposed opposite to each other and an arc plate connecting the two flat plates, the two flat plates and the arc plate enclose an injection hole 53, and the injection hole 53 is a waist-shaped hole.

After the corrosive liquid enters the reduced diameter pipe section 51 through the connecting pipe section 54, the pressure of the liquid medium is increased due to the compression of the volume of the corrosive liquid. Corrosive liquid with certain pressure flows into flat pipe section 52 from undergauge pipe section 51, because flat pipe section 52 and external intercommunication, corrosive liquid's pressure obtains releasing, thus, corrosive liquid evenly sprays the inner chamber of liquid container 8 along flat pipe section 52 inner wall direction, corrosive liquid direct contact liquid container 8's inner wall has effectively been avoided, reduce the impact force of liquid to the container inner wall, the corrosion rate of corrosive liquid to container inner wall and 8 business turn over hole welding accessories of liquid container has been slowed down, thereby container inner wall and 8 business turn over hole welding accessories's of liquid container anticorrosion ability has been strengthened, the service life of the device is prolonged.

Preferably, the joint 5 is a seamless stainless steel pipe with standard specification, and the outer circumference of the stainless steel pipe is punched by a punching device, so that the reduced diameter pipe section 51, the flat pipe section 52 and the connecting pipe section 54 are integrally formed. Thus, the manufacturing cost of the joint 5 is reduced while the mechanical strength of the joint 5 is ensured.

Of course, in an alternative embodiment not shown in the drawings, the reduced diameter pipe section 51, the flat pipe section 52 and the connecting pipe section 54 may be separately machined and then assembled by welding.

As shown in fig. 1 to 3, in the embodiment of the present invention, the corrosion prevention fitting further includes a connection flange 6 disposed at the outer periphery of the flow channel pipe 3, and the connection flange 6 is movably disposed in the axial direction of the flow channel pipe 3.

According to the above arrangement, the connecting flange 6 moves along the axial direction of the flow channel pipe 3, the axial distance between the connecting flange and the external pipeline flange can be adjusted, the connecting pipelines with different length sizes in a certain range can be conveniently connected, and therefore the flexibility of connection with the external pipeline is improved, and corrosive liquid can be guaranteed to be normally conducted and flow into the flow channel pipe 3.

Specifically, the connecting flange 6 is provided with an axial through hole, so that the connecting flange 6 can be fitted around the periphery of the runner pipe 3. The one end of runner pipe 3 is provided with annular boss 31, and flange 6 is installed between annular boss 31 and ring flange 41, and flange 6 can move along the axis direction of runner pipe 3 between annular boss 31 and ring flange 41, is convenient for connect the not connecting line of length size in the certain limit, great improvement with external pipeline connection's flexibility ratio.

In addition, an axial through hole is formed in the connecting flange 6, a plurality of bolt connecting holes are uniformly distributed in the circumferential direction of the connecting flange 6, and the plurality of bolt connecting holes are arranged around the axial through hole. The connection flange 6 can rotate in the circumferential direction with respect to the runner pipe 3, the external line flange is generally welded to the connection pipe, and the bolt connection holes of the connection flange 6 can be aligned to the bolt connection holes of the external line flange by rotating the connection flange, thereby improving the connection efficiency of the connection flange 6 and the external line flange.

It should be noted that the above packing box assembly is mainly applied to the corrosion prevention fitting at the inlet of the liquid container 8, and the following specifically describes the composition and corresponding assembly steps of the corrosion prevention fitting at the inlet of the liquid container 8.

Specifically, as shown in fig. 2 and 3, the corrosion prevention fitting at the inlet mainly comprises a packing box assembly, a connecting flange 6, a gland 4, a protective sleeve 1, a runner pipe 3 and a joint 5. Wherein, lag 1 welding is in the entrance of liquid container 8, packing box subassembly and lag 1 threaded connection, and the packing box subassembly is worn to establish by runner pipe 3 through the axial through hole of gland 4, and flange 6 and gland 4 cover are established on the outer circumference of runner pipe 3, the one end attach fitting 5 of runner pipe 3.

Assembly steps for corrosion protection fittings at the inlet of the liquid container 8:

s10: welding the protective sleeve 1 at the inlet of the liquid container 8;

s20: connecting the packing box assembly with the protecting sleeve 1 through threads;

s30: completing the matching installation of the gland 4 and the packing box assembly;

s40: the connecting flange 6 is arranged on the outer circumference of the runner pipe 3 in a penetrating way;

s50: the packing box assembly is arranged at one end of the runner pipe 3 provided with the first external thread 32 through the outside of the liquid container 8;

s60: inside the liquid container 8, the joint 5 is connected to the runner pipe 3;

s70: the connecting flange 6 is flanged with an external pipeline.

It should be noted that, since the liquid medium with relatively strong corrosiveness (such as a liquid medium with strong acidity or strong alkalinity) flowing from the inlet of the liquid container 8 is sufficiently mixed with other liquid medium with relatively weak corrosiveness or without corrosiveness stored in advance in the liquid container 8, the corrosiveness of the mixed liquid medium is remarkably reduced, and thus, the corrosion prevention requirement at the outlet of the liquid container 8 is relatively low.

In another embodiment of the present invention, as shown in fig. 4, the packing box assembly includes a packing box 21 and a packing flange 23. Wherein, packing box 21 set up in the periphery of flow channel pipe 3, and at least some packing box 21 is located the axial through-hole of lag 1, the packing flange 23 of being connected with packing box 21, packing flange 23 sets up the one end of keeping away from liquid container 8 at packing box 21, and packing flange 23 cover is established in the periphery of flow channel pipe 3, and wherein, anticorrosive accessory is still including setting up flange 6 and the gasket 7 in the periphery of flow channel pipe 3, and gasket 7 is located between packing flange 23 and flange 6.

According to the above arrangement, the connecting flange 6 can press the packing 7 so that the packing 7 expands in the radial direction, and can seal the gap between the inner wall surface of the packing box 21 and a part of the outer wall surface of the flow passage pipe 3, thereby preventing the liquid in the liquid container 8 from leaking. The above packing box assembly is applied to the anticorrosive fittings at the outlet, and the composition and corresponding assembly steps of the anticorrosive fittings at the outlet of the liquid container 8 will be described in detail below.

Specifically, as shown in fig. 4, anticorrosive accessory of exit hole department mainly includes runner pipe 3, packing box subassembly, flange 6, lag 1, wherein, lag 1 welding is in 8 exit hole departments of liquid container, packing box subassembly is connected with lag 1, runner pipe 3 sets up in packing box subassembly and lag 1's inside, gasket 7 and flange 6 cover are established on the outer circumference of runner pipe 3, the one end and the 8 intercommunication of liquid container of runner pipe 3, the other end and the external connection flange connection of relative setting.

Assembly steps of the corrosion protection fitting for the outlet of the liquid container 8:

s10: welding the protective sleeve 1 at the outlet of the liquid container 8;

s20: connecting the packing box assembly with the protecting sleeve 1 through threads;

s30: penetrating the end, provided with the first external thread 32, of the runner pipe 3 into a packing box assembly from the inside of the liquid container 8;

s40: the gasket 7 and the connecting flange 6 are sleeved in sequence from one end of the runner pipe 3 provided with the first external thread 32;

s50: aligning the bolt connecting holes of the connecting flange 6 and the packing flange 23, and installing corresponding threaded fasteners;

s60: the end of the runner pipe 3 provided with the first external thread 32 is connected with an external connection line.

From the above description, it can be seen that the above-mentioned embodiments of the present invention achieve the following technical effects: corrosive liquid enters the inner cavity of the liquid container through the runner pipe, and one end of the runner pipe extends into the inner cavity of the liquid container, namely, a certain interval is formed between the end of the runner pipe extending into the liquid container and the side wall of the inlet hole of the liquid container, so that the corrosive liquid flowing out of the runner pipe does not directly impact the connecting position of the protective sleeve and the liquid container, and the connecting position is not easy to leak; furthermore, due to the arrangement of the protective sleeve, the thickness of a connecting area between the flow passage pipe and the inner wall of the inlet and outlet hole of the liquid container is increased, and the leakage period of the connecting area caused by corrosion is delayed, so that the corrosion resistance of the connecting area is improved.

It is obvious that the above described embodiments are only some of the embodiments of the present invention, and not all of them. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts shall belong to the protection scope of the present invention.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments according to the present application. As used herein, the singular is intended to include the plural unless the context clearly dictates otherwise, and it should be further understood that the terms "comprises" and/or "comprising," when used in this specification, specify the presence of features, steps, operations, devices, components, and/or combinations thereof.

It should be noted that the terms "first," "second," and the like in the description and claims of this application and in the drawings described above are used for distinguishing between similar elements and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used is interchangeable under appropriate circumstances such that the embodiments of the application described herein are capable of operation in sequences other than those illustrated or described herein.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims (11)

1. A corrosion resistant fitting for a liquid container, said fitting comprising:

the protective sleeve (1) is arranged at an inlet and outlet hole of the liquid container (8) and is fixedly connected with the liquid container (8), and the protective sleeve (1) is provided with an axial through hole;

the protecting sleeve (1) is sleeved on the periphery of the flow channel pipe (3), and one end of the flow channel pipe (3) penetrates through the axial through hole and then extends into the inner cavity of the liquid container (8);

and the packing box assembly is arranged between the protective sleeve (1) and the flow channel pipe (3) to seal a gap between the inner wall surface of the protective sleeve (1) and the outer wall surface of the flow channel pipe (3).

2. Corrosion protection accessory according to claim 1, characterized in that the protective sleeve (1) comprises:

a first tube (11) disposed in the access hole;

and the second pipe body (12) is connected with the first pipe body (11), the outer diameter of the second pipe body (12) is larger than that of the first pipe body (11), a step surface (13) is formed at the joint of the second pipe body (12) and the first pipe body (11), and the step surface (13) is in butt contact with the inner wall surface of the liquid container (8).

3. The corrosion protection accessory of claim 1, wherein the packing box assembly comprises:

the packing box (21) is arranged on the periphery of the runner pipe (3), and at least one part of the packing box (21) is positioned in the axial through hole of the protective sleeve (1);

packing (22) sets up the periphery of runner pipe (3), packing (22) are located packing box (21) is interior in order to seal the clearance between the internal wall face of packing box (21) and the partial outer wall face of runner pipe (3).

4. The corrosion prevention fitting of claim 3 further comprising a gland (4) for compressing the packing (22) within the packing box (21), the gland (4) being fitted around the periphery of the runner tube (3).

5. The corrosion prevention accessory of claim 4, wherein the packing box assembly further comprises a packing flange (23) connected with the packing box (21), the packing flange (23) is arranged at one end, far away from the liquid container (8), of the packing box (21), the packing flange (23) is sleeved on the periphery of the runner pipe (3), the packing flange (23) is provided with a flange through hole for the packing box (21) to penetrate through, and the gland (4) is connected with the packing flange (23) so as to compress the packing (22) in the packing box (21).

6. Fitting according to any one of claims 1 to 5, further comprising a fitting (5), the fitting (5) being detachably connected to an end of the runner pipe (3) located in the inner cavity of the liquid container (8).

7. Corrosion protection fitting according to claim 6, characterized in that the joint (5) comprises a reducing pipe section (51) and a flat pipe section (52) connected to the reducing pipe section (51), the flat pipe section (52) comprising two oppositely arranged plates and an arc connecting the two plates, the two plates and the arc enclosing an injection hole (53).

8. Corrosion protection fitting according to claim 7, characterized in that the joint (5) further comprises a connecting pipe section (54) connected to the reduced diameter pipe section (51), the joint (5) being connected to the runner pipe (3) by means of the connecting pipe section (54).

9. Corrosion protection fitting according to any one of claims 1 to 5, characterized in that it further comprises a connection flange (6) arranged at the outer circumference of the runner pipe (3), said connection flange (6) being movably arranged in the axial direction of the runner pipe (3).

10. The corrosion protection assembly of claim 1 or 2 wherein said packing box assembly comprises:

the packing box (21) is arranged on the periphery of the runner pipe (3), at least one part of the packing box (21) is positioned in the axial through hole of the protective sleeve (1),

the packing flange (23) is connected with the packing box (21), the packing flange (23) is arranged at one end, far away from the liquid container (8), of the packing box (21), and the packing flange (23) is sleeved on the periphery of the runner pipe (3);

the anti-corrosion fitting further comprises a connecting flange (6) and a gasket (7) which are arranged on the periphery of the runner pipe (3), and the gasket (7) is located between the packing flange (23) and the connecting flange (6).

11. A liquid container assembly comprising a liquid container having a plurality of access apertures, wherein the liquid container assembly further comprises a corrosion protection fitting disposed at least one of the access apertures, the corrosion protection fitting being as claimed in any one of claims 1 to 9.

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