A kind of urea case lid
Technical field
The utility model belongs to urea box technical field, particularly relates to a kind of urea case lid.
Background technology
Urea case lid structural shape is varied, mainly contains three kinds of structures at present, is specially:
(1) the first: do not possess the urea lid of airing function structure with anti-lost chain
Its anti-lost chain and urea case lid connecting portion are positioned at the side of urea case lid, easily not easily rotate by the interference of anti-lost chain position, and the urea case lid of this structure are not because possessing airing function, easily causes urea box to block in urea case lid rotary course;
(2) the second: with the urea case lid of anti-lost chain and airing function
The anti-lost chain of this structure is positioned at the top of urea case lid, can conveniently rotate, its anti-lost chain and urea case lid rotate to block by one and are connected, and sealed by seal ring, affect by assembling between the two, overall tensile strength is not high, easy generation blocking pulls, ruptures, its airing function realizes by the film of one deck permeable watertight, but there is outside rainwater and enter case lid inside by plug for seal circle place, airing function can be caused to lose efficacy the risk of (rainwater envelope gas), finally cause urea box to be heated bulging;
(3) the third: the urea case lid not possessing airing function with anti-lost chain
The drawback of the urea case lid of this structure is easy loss, and easily causes urea box to be heated bulging.
Utility model content
The purpose of this utility model is to provide that a kind of structure is simple, integral structure tensile strength is high and the urea case lid of ventilative non-overflow.
The utility model is achieved in that a kind of urea case lid, and described urea case lid comprises box cover body, anti-lost chain card and air permeable plate, wherein:
Described box cover body is provided with the circular groove that T connector portion and described T connector portion and described box cover body upper surface are formed, and described anti-lost chain card sleeve is crossed described T connector portion and is assembled in described circular groove;
Described air permeable plate is arranged on described urea case lid with urea box in conjunction with one end, and described air permeable plate is provided with several breather holes;
Described box cover body is provided with several case lid pores be communicated with the air guide chamber of box cover body near the one end in described T connector portion, from described case lid pore, extend to the one end of installing described air permeable plate in described box cover body and be provided with multi-cavity mechanism, described multi-cavity mechanism is communicated with described case lid pore, breather hole.
As a kind of improved plan, between described T connector portion and described anti-lost chain card, be provided with the snap ring clamping described anti-lost chain card.
As a kind of improved plan, described snap ring is provided with the opening of 30 degree.
As a kind of improved plan, the bearing of trend of described case lid pore is mutually vertical with the bearing of trend of described breather hole.
As a kind of improved plan, described multi-cavity mechanism is stepped labyrinth mechanism.
As a kind of improved plan, described multi-cavity mechanism is less than near described air permeable plate cavity size near the cavity size of described case lid pore.
As a kind of improved plan, between the sealed step of described box cover body and urea box mouth, be provided with seal ring.
As a kind of improved plan, the mode that described air permeable plate is rotated by buckle is connected with described box cover body, and described air permeable plate is provided with triangle projection near urea box side.
As a kind of improved plan, the side that described air permeable plate is positioned at described multi-cavity mechanism is provided with circular protrusions.
As a kind of improved plan, described breather hole is arranged on the boundary position of described air permeable plate, and corresponding with the boundary position of described multi-cavity mechanism.
Because urea case lid comprises box cover body, anti-lost chain card and air permeable plate, box cover body is provided with the circular groove that T connector portion and T connector portion and box cover body upper surface are formed, and anti-lost chain card sleeve is crossed T connector portion and is assembled in circular groove; Air permeable plate is arranged on urea case lid with urea box in conjunction with one end, and air permeable plate is provided with several breather holes; Box cover body is provided with several case lid pores be communicated with the air guide chamber of box cover body near the one end in T connector portion, from described case lid pore, extend to the one end of installing described air permeable plate in box cover body and be provided with multi-cavity mechanism, multi-cavity mechanism is communicated with described case lid pore, breather hole, realize the fastening of anti-lost chain card, improve the tensile strength of overall urea case lid, meanwhile, adopt multi-cavity mechanism to realize ventilative and waterproof function, structure is simple, easy to make.
Accompanying drawing explanation
Fig. 1 is the structural representation of the urea case lid that the utility model embodiment one provides;
Fig. 2 be the utility model embodiment two provide structural representation;
Fig. 3 and Fig. 4 is the structural representation of the air permeable plate that the utility model provides;
Wherein, 1-box cover body, the anti-lost chain card of 2-, 3-air permeable plate, 4-T type head, 5-circular groove, 6-breather hole, 7-case lid pore, 8-multi-cavity mechanism, 9-air guide chamber, 10-snap ring, 11-sealed step, 12-seal ring, 13-triangle projection, 14-circular protrusions.
Detailed description of the invention
In order to make the purpose of this utility model, technical scheme and advantage clearly understand, below in conjunction with drawings and Examples, the utility model is further elaborated.Should be appreciated that specific embodiment described herein only in order to explain the utility model, and be not used in restriction the utility model.
Fig. 1 shows the structural representation of the urea case lid that the utility model provides, and for convenience of explanation, only gives the part relevant to the utility model in figure.
Urea case lid comprises box cover body 1, anti-lost chain card 2 and air permeable plate 3, wherein:
Box cover body 1 is provided with the circular groove 5 that T connector portion 4 and T connector portion 4 and box cover body 1 upper surface are formed, and anti-lost chain card 2 overlapped T connector portion 4 and is assembled in circular groove 5;
Air permeable plate 3 is arranged on urea case lid with urea box in conjunction with one end, and air permeable plate 3 is provided with several breather holes 6;
Box cover body 1 is provided with several case lid pores 7 be communicated with the air guide chamber 9 of box cover body 1 near the one end in T connector portion 4, from case lid pore 7, extend to the one end of installing air permeable plate 3 in box cover body 1 be provided with multi-cavity mechanism 8, multi-cavity mechanism 8 is communicated with case lid pore 7, breather hole 6.
Wherein, this box cover body 1 global formation, overall tensile strength is higher, and the setting in this T connector portion 4 is convenient to assemble this anti-lost chain card 2, and this anti-lost chain card 2 can adopt general steel plate material, and it overlapped T connector portion 4 and is assembled in circular groove 5.
In this embodiment, as shown in Figure 1, when anti-lost chain card 2 is assembled in circular groove 5, can be clamped by snap ring 10, that is, between T connector portion 4 and anti-lost chain card 2, be provided with the snap ring 10 clamping anti-lost chain card 2, this snap ring 10 can adopt spring steel material, it has certain elasticity, and it can arrange the opening of 30 degree.
In the utility model, the quantity of the case lid pore 7 that this box cover body 1 is arranged near T connector portion 4 can arrange four, the bearing of trend of this case lid pore 7 is mutually vertical with the bearing of trend of breather hole 6, avoids outside rainwater, dust etc. and directly enters in urea box.
Wherein, above-mentioned multi-cavity mechanism 8 is stepped labyrinth mechanism, and particularly, multi-cavity mechanism 8 is less than near air permeable plate 3 cavity size near the cavity size of case lid pore 7, can certainly adopt other modes.
Known with reference to figure 1; above-mentioned casing pore, multi-cavity mechanism 8 and breather hole 6 are interconnected; after urea case lid is tightened; in urea box, heated gas line enters multi-cavity mechanism 8 by breather hole 6; then the case lid pore 7 of box cover body 1 is entered; discharge through air guide chamber 9, protection urea box expands because the case internal gas pressure that is heated raises and is out of shape.
As shown in Figure 1, seal ring 12 is provided with between the sealed step 11 of box cover body 1 and urea box mouth, that is: box cover body 1 is by seal ring 12 and urea box mouth fitted seal, by sealed step and urea box mouth crush seal circle 12, realizes the requirement of urea case lid integral sealing.
As shown in Figures 2 and 3, the mode that air permeable plate 3 is rotated by buckle is connected with box cover body 1, air permeable plate 3 is provided with triangle projection 13 near urea box side, and above-mentioned box cover body 1 is provided with the structure that the snap device that arranges with air permeable plate 3 edge adapts, and connects with the buckle realizing both;
Wherein, the setting of this triangle projection 13, when assembling this air permeable plate 3 for operating personal, uses, fast convenient.
As shown in Figure 4, the side that air permeable plate 3 is positioned at multi-cavity mechanism 8 is provided with circular protrusions 14, ensure that the urea of leaping up from breather hole 6 can not deposit at air permeable plate 3, but flow in urea box by the breather hole 6 of air permeable plate 3 and the tolerance clearance between air permeable plate 3 and box cover body 1.
As shown in Figure 3, breather hole 6 is arranged on the boundary position of air permeable plate 3, and it is corresponding with the boundary position of multi-cavity mechanism 8, when urea liquid is upper leaping up, first urea liquid collides with the edge of the multi-cavity mechanism 8 in box cover body 1, this multi-cavity mechanism 8 adopts ladder to shrink, and actv. stops on urea liquid leaps up.
The urea case lid that the utility model provides has following technique effect:
(1) the T connector portion 4 be connected with anti-lost chain card 2 and box cover body 1 are formed in one structure, and overall tensile strength is high, rotates convenient, flexible, avoid the anti-lost chain of package assembly pattern to pull, situation of breaking occurs;
(2) the utility model avoids the barrier film adopting permeable watertight function, but adopt ladder multi-cavity structure to realize, this ventilating structure reliability is high, not easily block, avoid outside rainwater, dust enters the risk that barrier film causes airing function to lose efficacy, and on leap up enter urea lid solution by multi-cavity mechanism 8 blocking reflected, can be passed through hole and tolerance clearance returns urea box;
(3) structure is simple, and easy to make, cost is low.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all do within spirit of the present utility model and principle any amendment, equivalent to replace and improvement etc., all should be included within protection domain of the present utility model.