CN217872977U - Combined ventilation structure of urea tank and remote filling assembly - Google Patents

Abstract

The utility model relates to a urea tank and long-range filling subassembly's combination ventilation structure, it includes a jar body, filling ventilation subassembly and blast pipe, the internal holding cavity that holds urea solution that has of jar, urea solution in the holding cavity has a highest liquid level, filling ventilation subassembly includes filling pipe and a filling seat that can open and close the setting, filling pipe has a feed liquor end and a liquid end, when filling seat closes, still leave the air current passageway with external intercommunication, liquid end holding cavity intercommunication sets up, liquid end has seted up the air vent above the highest liquid level, the blast pipe has air inlet end and exhaust end, air inlet end and holding cavity intercommunication set up, the liquid position of liquid end and the highest air inlet position of air inlet end set up with the highest liquid level parallel and level in the holding cavity, the exhaust end communicates the setting of filling seat; the problem of among the prior art urea jar ventilation structure part too much, increased the mould technology, improved the manufacturing degree of difficulty and cost, occupation space is big simultaneously is solved.

Description

Combined ventilation structure of urea tank and remote filling assembly

Technical Field

The utility model relates to a urea jar technical field especially relates to a combination ventilation structure of urea jar and long-range filling subassembly.

Background

In recent years, with the stricter requirements on the automobile emission, more and more automobiles carry out tail gas purification treatment to achieve the national six or the European six emission, a selective catalytic reduction system is one of important modes in the field of diesel vehicles, urea solution is filled in a urea tank, and the emission of the automobile tail gas reaches the national six standard after passing through the urea tank, so that a urea supply system needs to be arranged on the diesel vehicle to purify the tail gas of the diesel vehicle.

Along with the update of automobile technology, the requirements on a urea supply system are more and more increased, on one hand, the requirement on sufficient urea volume can meet the requirements on an exhaust gas purification function and the arrangement of a whole automobile, and on the other hand, the requirements on more convenient installation and maintenance and lower cost are required, so that a series of urea tanks, urea filling and ventilating structures are provided, the conventional urea tank needs to maintain the pressure balance in the urea tank to normally supply the urea solution in order to ensure the normal running of the automobile, for example, chinese utility model patent with patent application number CN201822003238.6, an integrated urea tank for a pick-up exhaust gas treatment system is provided, the integrated urea tank comprises a urea tank body with a lower opening structure, upper buckles are arranged at intervals on the lower opening edge of the urea tank body, the outer edge of the mounting seat of the urea pump is provided with a lower buckle, a urea tank body is clamped and fixed with the mounting seat into a whole through the upper buckle and the lower buckle, the urea tank body is provided with an exhaust joint, a liquid injection joint and a one-way vent valve, the one-way vent valve is provided with a vent pipe communicated with the atmosphere at the outer end, the urea tank body is provided with a first lug and a second lug, a liquid level sensor is arranged on a boss of the mounting seat in the urea tank body through a support, a heating sheet and a temperature are connected through a wire, and a quality integrated sensor is connected.

Therefore, the ventilation structure of the urea tank in the prior art has the defects of excessive parts, increased mould process, increased manufacturing difficulty and cost and large occupied space.

SUMMERY OF THE UTILITY MODEL

In view of this, a need exists for a combined ventilation structure of a urea tank and a remote filling assembly, so as to solve the problems of excessive ventilation structure components of the urea tank, increased mold technology, increased manufacturing difficulty and cost, and large occupied space in the prior art.

The utility model provides a urea tank and long-range filling subassembly's combination ventilation structure includes a jar body, filling subassembly and blast pipe of ventilating, the internal holding cavity that holds urea solution that has of jar, urea solution in the holding cavity has a highest liquid level, the filling subassembly of ventilating includes filling pipe and the filling seat that can open and close the setting, the filling pipe has a feed liquor end and a liquid end, it establishes to establish to add the seat cover and fixes the feed liquor is served, when the filling seat is closed, still leave the air current passageway with external intercommunication, it wears to establish to fix to go out the liquid end on the jar body, and with holding cavity intercommunication sets up, it has seted up the air vent in the top of highest liquid level to go out the liquid end, the blast pipe has inlet end and exhaust end, the inlet end wears to establish to fix on the jar body, and with holding cavity intercommunication sets up, go out the liquid position of liquid end and the highest inlet end the highest air inlet position with the highest liquid level parallel and level in the holding cavity sets up, the exhaust end intercommunication the filling seat sets up.

Furthermore, the liquid outlet end is a filling joint, one end of the filling joint is communicated with the filling pipe, the other end of the filling joint penetrates through the top of the tank body and extends into the accommodating cavity, and the filling joint is hollow and is used for communicating the accommodating cavity with the filling pipe.

Furthermore, the air inlet end is an exhaust joint, the exhaust joint is arranged in a hollow mode, one end of the exhaust joint is communicated with the exhaust pipe, the other end of the exhaust joint penetrates through the side wall of the tank body and extends into the accommodating cavity, and the top surface of the inner wall in the accommodating cavity and the lowest surface of the filling joint are located on the highest liquid level.

Furthermore, the exhaust pipe and the filling pipe are close to each other and extend in the same direction, and the exhaust pipe and the outer peripheral wall of the filling pipe are relatively fixedly arranged.

Furthermore, the exhaust pipe and the filling pipe extend in an overall downward direction from the filling seat to the tank body, and the exhaust pipe and the filling pipe are smoothly arranged in the filling pipe.

Furthermore, the filling seat is of a hollow cylindrical structure, openings are formed in two ends of the filling seat, one end of the filling seat is communicated with the filling pipe, a filling cover is detachably fixed to the other end of the filling seat, and the exhaust end of the exhaust pipe is communicated with the inside of the filling seat through the side wall of the filling seat.

Furthermore, the filling cover comprises a support frame and an outer cover, the support frame is detachably fixed to one end, far away from the filling seat, of the filling pipe, the outer cover is fixedly sleeved on the support frame, the support frame is arranged in a hollow mode, and a gap is formed between the outer cover and the support frame support to form an airflow channel.

Furthermore, a breathable film for preventing liquid from passing through is fixedly arranged in the support frame along the direction vertical to the axis of the support frame.

Furthermore, a connecting piece is arranged between the filling cover and the filling seat, two ends of the connecting piece are arranged to be annular structures, and two ends of the annular structure of the connecting piece are respectively sleeved on the periphery of the filling seat and the periphery of the filling cover.

Further, the inner diameter of the vent hole is smaller than or equal to one third of the inner diameter of the filling joint.

Compared with the prior art, the combined ventilation structure of the urea tank and the remote filling assembly provided by the utility model replaces the ventilation valve and the ventilation pipe structure in the prior art by the arrangement of the filling ventilation assembly and the exhaust pipe, thereby realizing the effects of reducing the number of ventilation structures and the mold process, reducing the manufacturing difficulty and cost of the urea tank and avoiding occupying the top space of the urea tank; the filling and ventilating assembly comprises a filling pipe and a filling seat which can be opened and closed, the exhaust pipe is provided with an air inlet end and an exhaust end, the exhaust pipe is used for exhausting gas in the urea tank when urea is filled, so that the urea solution can smoothly enter the containing cavity through the filling pipe, when the urea solution is filled to the position of the highest liquid level, the air inlet end of the exhaust pipe is immersed by the urea solution, meanwhile, the liquid outlet end of the filling pipe is also sealed by the urea solution, the gas in the urea tank cannot be exhausted at the moment, a filling gun for filling the urea tank automatically jumps to stop filling the urea solution, the expansion volume in the urea tank is ensured, the filling seat can be closed after filling is completed, dirt is prevented from entering the urea tank, leakage of the urea solution is also avoided, and meanwhile, an air flow channel which only allows the urea solution to pass through is reserved between the closed filling seat and the outside so as to balance the pressure in the urea tank, and further guarantee normal supply of the urea solution when the whole vehicle runs.

Drawings

Fig. 1 is a schematic structural diagram of an entire embodiment of a combined ventilation structure of a urea tank and a remote filling assembly provided by the present invention;

fig. 2 is a schematic partial cross-sectional view of a urea tank according to an embodiment of the combined ventilation structure of the urea tank and the remote filling assembly provided by the present invention;

fig. 3 is a schematic structural diagram of a filling cap in an embodiment of a combined ventilation structure of a urea tank and a remote filling assembly provided by the present invention;

fig. 4 is an enlarged schematic view of a portion a in fig. 3.

In the figure: 1. a tank body; 2. a filling and venting assembly; 3. an exhaust pipe; 11. an accommodating cavity; 12. the highest liquid level; 21. a filling pipe; 22. a filling seat; 221. filling a cover; 2211. a support frame; 2212. a housing; 2213. a gas permeable membrane; 222. a connecting member; 23. filling a joint; 231. a vent hole; 31. an exhaust joint.

Detailed Description

The following detailed description of the preferred embodiments of the invention, which is to be read in connection with the accompanying drawings, forms a part of this application, and together with the embodiments of the invention, serve to explain the principles of the invention and not to limit its scope.

For the convenience of understanding, explain earlier this urea tank and long-range filling subassembly's combination ventilation structure's application scene, as shown in fig. 1, the utility model provides a urea tank need open when filling urea solution and annotate seat 22 to insert the filling gun and annotate in the seat 22, make urea solution in the urea tank flows to via the filler pipe 21, the utility model discloses well used filling gun is common filling gun on the market, and it can absorb the gas that the urea tank arranged in the seat 22 of annotating when annotating, makes in urea solution can get into the urea tank smoothly, and it can make the response to the rising of urea tank internal pressure simultaneously, and when urea tank internal pressure rose, it can jump the rifle automatically, stops.

As shown in fig. 1-2, the combined ventilation structure of a urea tank and a remote filling assembly in this embodiment includes a tank body 1, a filling ventilation assembly 2, and an exhaust pipe 3, where the tank body 1 has a containing cavity 11 for containing a urea solution, the urea solution in the containing cavity 11 has a highest liquid level 12, the filling ventilation assembly 2 includes a filling pipe 21 and a filling seat 22 capable of being opened and closed, the filling pipe 21 has a liquid inlet end and a liquid outlet end, the filling seat 22 is fixed on the liquid inlet end in a sleeved manner, when the filling seat 22 is closed, an airflow channel communicating with the outside is still left, the liquid outlet end is fixed on the tank body 1 in a penetrating manner and communicating manner with the containing cavity 11, the liquid outlet end is provided with a ventilation hole 231 above the highest liquid level 12, the exhaust pipe 3 has a gas inlet end and an exhaust end, the gas inlet end is fixed on the tank body 1 in a penetrating manner and communicating with the containing cavity 11, a highest gas inlet position of the liquid outlet end and a highest liquid inlet position of the gas inlet end are flush with the highest liquid level 12 in the containing cavity 11, and the exhaust end is provided in a communicating manner with the filling seat 22.

The tank body 1 is a shell of the urea tank, the interior of the tank body is hollow so as to form an accommodating cavity 11 for accommodating urea solution, the urea solution has a highest liquid level 12 when being filled, and a certain distance is kept between the highest liquid level 12 and the top of the urea tank so as to ensure the expansion volume in the urea tank; the filling and ventilating assembly 2 is used for remotely filling the urea tank and keeping the balance of the internal and external air pressure of the urea tank, the filling and ventilating assembly 2 comprises a filling pipe 21 and a filling seat 22 which can be opened and closed, the filling seat 22 is sleeved and fixed on the liquid inlet end of the filling pipe 21, the liquid outlet end of the filling pipe 21 extends into the accommodating cavity 11, when the urea solution is filled, the filling seat 22 is opened, a filling gun is inserted into the filling seat 22 for filling, so that the urea solution enters the accommodating cavity 11 through the filling pipe 21, after the filling is completed, the filling seat 22 can be closed to prevent dirt from entering the urea tank and the urea solution from flowing outwards, when the filling seat 22 is closed, an air flow channel communicated with the outside is still formed, the liquid outlet end is provided with a vent hole 231 for ventilating at the highest liquid level, and the air pressure in the urea tank keeps balance with the external air pressure through the vent hole 231, the filling pipe 21 and the air flow channel on the filling seat 22; the exhaust pipe 3 is used for discharging gas in the urea tank when urea solution is filled into the urea tank, the exhaust pipe 3 is provided with an air inlet end and an exhaust end, the air inlet end is communicated with the accommodating cavity 11, the exhaust end is communicated with the filling seat 22, the gas in the urea tank is discharged through the exhaust pipe 3, the filling seat 22 and the filling gun when the urea solution is filled, the highest air inlet position of the air inlet end of the exhaust pipe 3 and the liquid outlet end of the filling pipe 21 are located on the same horizontal plane, the horizontal plane is the highest liquid level 12, and the position of the highest liquid level 12 is changed according to the height of the air inlet end of the exhaust pipe 3 and the liquid outlet end of the filling pipe 21.

It can be understood that when the urea solution is filled, the liquid level of the urea solution rises continuously, when the liquid level of the urea solution rises to be located on the same horizontal plane as the highest air inlet position of the air inlet end of the exhaust pipe 3 and the liquid outlet end of the filling pipe 21, the air inlet end of the exhaust pipe 3 is immersed by the urea solution, and the liquid outlet end of the filling pipe 21 is also sealed by the urea solution, at this time, the gas in the urea tank cannot be discharged, the filling gun for filling the urea tank automatically jumps to stop filling the urea solution, so that the expansion volume in the urea tank is ensured, and at this time, the urea solution in the accommodating cavity 11 is located at the highest liquid level 12.

In this embodiment, the filling and venting assembly 2 includes a filling pipe 21 and a filling seat 22, and the filling and venting assembly 2 is used for filling the urea solution into the urea tank and balancing the air pressure inside and outside the urea tank, so as to ensure the normal supply of the urea solution when the whole vehicle runs.

In order to facilitate the connection between the filling pipe 21 and the urea tank, in a preferred embodiment, as shown in fig. 2, the liquid outlet end is a filling joint 23, one end of the filling joint 23 is disposed to communicate with the filling pipe 21, the other end of the filling joint 23 extends into the accommodating cavity 11 through the top of the tank body 1, and the filling joint 23 is disposed in a hollow manner to communicate the accommodating cavity 11 with the filling pipe 21.

The filling joint 23 is fixedly connected with the urea tank, and the filling joint 23 and the filling pipe 21 can be fixed in a detachable mode, so that the filling pipe 21 can be conveniently mounted and replaced during maintenance.

To ensure an expanded volume within the canister, in a preferred embodiment, the vent hole 231 has an inner diameter that is less than or equal to one third of the inner diameter of the fill connector 23.

It will be appreciated that when the liquid level in the urea tank is at the highest level, an oversized vent 231 will result in too much urea solution entering the urea tank, which will result in a reduced expansion volume in the urea tank.

In order to avoid the mutual interference between the filling and the exhausting, in a preferred embodiment, as shown in fig. 1, the filling seat 22 is a hollow cylindrical structure, two ends of the filling seat are open, one end of the filling seat is communicated with the filling pipe 21, the other end of the filling seat is detachably fixed with a filling cap 221, and the exhausting end of the exhausting pipe 3 is communicated with the inside of the filling seat 22 through the side wall of the filling seat 22.

The filling gun injects urea solution into the filling pipe 21 from the end of the filling base 22, and gas discharged from the urea tank flows into an exhaust passage of the filling gun from the side wall of the filling base 22, so that the urea solution and the gas do not interfere with each other, and smooth filling is ensured.

In order to prevent the urea solution from flowing out or dirt from entering the urea tank, in a preferred embodiment, as shown in fig. 3, the filling cap 221 includes a support frame 2211 and an outer cover 2212, the support frame 2211 is detachably fixed on one end of the filling base 22 far away from the filling pipe 21, the outer cover 2212 is fixedly sleeved on the support frame 2211, the support frame 2211 is hollow, and a gap is formed between the outer cover 2212 and the support frame 2211 to form an air flow passage.

The support 2211 can be fixed with the liquid inlet end of the filling pipe 21 by threads, an outer cover 2212 is fixedly sleeved outside the support 2211, and a fine gap is reserved between the outer cover 2212 and the support 2211 to form an airflow channel, so that gas in the urea tank can be communicated with the outside through the vent hole 231, the filling pipe 21 and the airflow channel to balance the internal and external air pressures of the urea tank.

In order to further prevent the leakage of the urea solution, in a preferred embodiment, as shown in fig. 4, a gas permeable membrane 2213 for preventing the liquid from passing through is fixedly disposed in the support 2211 along a direction perpendicular to the axis thereof.

Wherein, the ventilated membrane 2213 is the membrane structure that only can pass through gas, and the setting of ventilated membrane 2213 makes gas can discharge to the external world from the urea jar to guarantee urea jar internal and external atmospheric pressure balance, simultaneously, restriction urea solution is to the external world of flow direction via ventilated membrane 2213, makes the automobile body even when the tilt state, and urea solution in the urea jar can not leak, has guaranteed the reliability when this device uses.

In order to facilitate opening and closing the filling base 22, in a preferred embodiment, as shown in fig. 3, a connecting member 222 is disposed between the filling cover 221 and the filling base 22, two ends of the connecting member 222 are annular structures, and two ends of the annular structure of the connecting member 222 are respectively sleeved on the periphery of the filling base 22 and the periphery of the filling cover 221.

Due to the arrangement of the connecting piece 222, even if the filling cover 221 is detached from the filling seat 22, the filling cover 221 can still be hung on the filling seat 22, and the filling cover 221 does not need to be placed in another position, so that the opening and closing of the filling seat 22 are facilitated when urea solution is filled.

In this embodiment, the exhaust pipe 3 is used for discharging gas in the urea tank when filling, so that the urea solution can smoothly enter the urea tank.

In a preferred embodiment, as shown in fig. 2, the air inlet end is an exhaust joint 31, the exhaust joint 31 is hollow, one end of the exhaust joint 31 is communicated with the exhaust pipe 3, the other end of the exhaust joint 31 extends into the accommodating cavity 11 through the side wall of the tank body 1, and the top surface of the inner wall of the exhaust joint 31 in the accommodating cavity 11 and the lowest surface of the filling joint 23 are both located on the highest liquid level 12.

The exhaust joint 31 is fixedly connected with the urea tank, and the exhaust joint 31 and the exhaust pipe 3 can be detachably fixed, so that the exhaust pipe 3 can be conveniently mounted and dismounted, meanwhile, the lowest surface of the filling joint 23 is flush with the highest liquid level 12 of the urea solution in the urea tank, and is also on the same horizontal plane with the topmost surface of the inner diameter of the exhaust joint 31 in the urea tank, so that when the urea solution is filled to the highest liquid level 12, the urea solution seals the exhaust joint 31 and the filling joint 23.

In order to reduce the space occupied by the exhaust pipe 3, in a preferred embodiment, as shown in fig. 1, the exhaust pipe 3 and the filler pipe 21 are disposed close to each other and extend in the same direction, and the exhaust pipe 3 and the outer peripheral wall of the filler pipe 21 are disposed in a relatively fixed manner.

In order to avoid the urea solution from flowing straight in the exhaust pipe 3 and the filling pipe 21, in a preferred embodiment, the exhaust pipe 3 and the filling pipe 21 are integrally extended downward from the filling seat 22 to the tank body 1, and the exhaust pipe 3 and the filling pipe 21 are smoothly arranged.

Compared with the prior art: the combined ventilation structure of the urea tank and the remote filling assembly provided by the utility model replaces the ventilation valve and the ventilation pipe structure in the prior art by the arrangement of the filling ventilation assembly 2 and the exhaust pipe 3, thereby realizing the effects of reducing the number of ventilation structures and the mold process, reducing the manufacturing difficulty and cost of the urea tank and avoiding occupying the top space of the urea tank;

meanwhile, the expansion volume in the urea tank can be ensured, along with the filling of the urea solution, the gas in the urea tank body 1 is compressed, flows to the filling seat 22 through the exhaust pipe 3 and is then absorbed by a gas recovery pipeline of the filling gun; when the urea solution filled in the urea tank submerges the exhaust joint 31, the urea solution seals the filling joint 23 in the urea tank, the filling gun, the filling seat 22, the filling pipe 21 and the urea tank body 1 form a closed loop, gas in the urea tank cannot be discharged, the filling gun automatically jumps to stop filling the urea solution, so that the urea solution is filled at the set highest liquid level 12, and the expansion volume in the urea tank is ensured;

the utility model provides a combination ventilation structure of urea jar and long-range filling subassembly still has the effect of pressure in the balanced urea jar, the filling is accomplished the back, take off the filling gun, filling lid 221 is installed and is added back on the filling seat 22, through air vent 231 on the filling joint 23 in the urea jar, filling pipe 21 connects, filling pipe 21, filling seat 22, the ventilated membrane 2213 in the filling lid 221, the air flue of clearance formation between the dustcoat 2212 of filling lid 221 and the supporting rack, form a passageway that can lead to atmosphere normally, thereby the normal supply of urea solution when the interior external pressure of balanced urea jar guarantees whole car operation.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims (10)

1. A combined ventilation structure of a urea tank and a remote filling assembly is characterized by comprising a tank body, a filling ventilation assembly and an exhaust pipe;

the tank body is internally provided with an accommodating cavity for accommodating urea solution, and the urea solution in the accommodating cavity has the highest liquid level;

the filling and ventilating assembly comprises a filling pipe and a filling seat capable of being opened and closed, the filling pipe is provided with a liquid inlet end and a liquid outlet end, the filling seat is sleeved and fixed on the liquid inlet end, when the filling seat is closed, an airflow channel communicated with the outside is still reserved, the liquid outlet end is fixedly arranged on the tank body in a penetrating manner and is communicated with the accommodating cavity, and a vent hole is formed above the highest liquid level at the liquid outlet end;

the exhaust pipe is provided with an air inlet end and an exhaust end, the air inlet end penetrates through the tank body and is fixed on the tank body and communicated with the containing cavity, the liquid outlet position of the liquid outlet end and the highest air inlet position of the air inlet end are arranged in parallel with the highest liquid level in the containing cavity, and the exhaust end is communicated with the filling seat.

2. The combined ventilating structure of the urea tank and the remote filling assembly as recited in claim 1, wherein the liquid outlet end is a filling joint, one end of the filling joint is communicated with the filling pipe, the other end of the filling joint penetrates through the top of the tank body and extends into the accommodating cavity, and the filling joint is hollow and is used for communicating the accommodating cavity and the filling pipe.

3. The combined ventilation structure of the urea tank and the remote filling assembly as claimed in claim 2, wherein the air inlet end is an exhaust joint, the exhaust joint is hollow, one end of the exhaust joint is communicated with the exhaust pipe, the other end of the exhaust joint extends into the accommodating cavity through the side wall of the tank body, and the top surface of the inner wall of the exhaust joint in the accommodating cavity and the lowest surface of the filling joint are both located on the highest liquid level.

4. The combined venting structure of a urea tank and a remote filling assembly as recited in claim 3, wherein said exhaust pipe and said filling pipe are disposed close to each other and extend in the same direction, and said exhaust pipe and the outer peripheral wall of said filling pipe are fixed relative to each other.

5. The combined breather structure of a urea tank and a remote filling assembly according to claim 4, wherein the exhaust pipe and the filling pipe extend in a downward direction from the filling seat to the tank body, and the exhaust pipe and the filling pipe are smoothly arranged in the filling pipe.

6. The combined ventilating structure of the urea tank and the remote filling assembly as recited in any one of claims 1 to 5, wherein the filling base is a hollow cylindrical structure, two ends of the filling base are open, one end of the filling base is communicated with the filling pipe, the other end of the filling base is detachably fixed with a filling cover, and the exhaust end of the exhaust pipe is communicated with the inside of the filling base through the side wall of the filling base.

7. The combined venting structure of a urea tank and a remote filling assembly as claimed in claim 6, wherein said filling cap comprises a supporting frame and an outer cover, said supporting frame is detachably fixed on an end of said filling base away from said filling pipe, said outer cover is fixedly sleeved on said supporting frame, said supporting frame is hollow, and a gap is formed between said outer cover and said supporting frame bracket for forming an air flow channel.

8. The combined venting structure of a urea tank and a remote filling assembly as claimed in claim 7, wherein a gas permeable membrane for preventing liquid from passing through is fixedly disposed in the supporting frame along a direction perpendicular to an axis thereof.

9. The combined ventilation structure of the urea tank and the remote filling assembly as claimed in claim 8, wherein a connecting member is disposed between the filling cover and the filling base, two ends of the connecting member are annular structures, and two ends of the annular structure of the connecting member are respectively sleeved on the periphery of the filling base and the periphery of the filling cover.

10. A combined venting structure for a urea tank and a remote filling assembly as claimed in claim 2, wherein the inner diameter of said vent hole is less than or equal to one third of the inner diameter of said filling joint.

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