Expansion water tank and valve cover

Abstract

The utility model discloses an expansion water tank which comprises a water tank body, the water tank body comprises an upper tank body and a lower tank body, a partition rib plate is arranged in the water tank body and divides the water tank body into a first tank body and a second tank body which are independent from each other, a first valve deck is installed on the top of the first tank body, and a second valve deck is installed on the bottom of the second tank body. A first valve cover is installed at the top of the first box body, a second valve cover is installed at the top of the second box body, a first box opening is formed in the top of the first box body, the interior of the first box body is divided into a plurality of unit chambers, every two adjacent unit chambers are communicated, the upper end of each unit chamber is connected with the top face of the upper box body, and the lower end of each unit chamber is connected with the bottom face of the lower box body; the upper end of one unit chamber located in the middle is combined to the periphery of the first box opening. A plurality of unit chambers are distributed around the unit chamber in the middle; a second box opening is formed in the top of the second box body, and the internal structure of the second box body and the internal structure of the first box body are symmetrical with the partition rib plate as the center line. The sealing device has the advantages of simple and compact structure, convenience in disassembly and assembly, good sealing effect and the like.

Description

Technical Field

[0001] This utility model relates to the field of expansion tank technology, and in particular to expansion tanks and valve covers. Background Technology

[0002] The expansion tank is a crucial component of an automotive cooling system, playing a vital role in dissipating heat from the engine. It expels gases from the cooling system and stores and replenishes coolant, preventing overheating and pressure buildup that could cause coolant to leak out or damage cooling components. The expansion tank pressure cap is a key component, ensuring the coolant maintains a certain pressure within the system, thereby enhancing its heat dissipation capacity.

[0003] Existing patent document CN209130177U discloses an expansion tank pressure cover made of plastic, which can prevent burns when opening the cover. In addition, the pressure cover and the opening of the expansion tank are sealed from the side, which reduces the impact of changes in the size of the expansion tank opening at high temperature on the performance of the pressure cover during use.

[0004] Existing patent document CN215596498U discloses a pressure relief cover for an expansion tank. By setting a pressure relief mechanism, when the pressure inside the expansion tank is too high, the pressure drives the pressure relief mechanism to release pressure, thus ensuring the pressure balance within the expansion tank system.

[0005] The above background information is provided only to aid in understanding the concept and technical solution of this utility model. It does not necessarily belong to the prior art of this patent application. In the absence of clear evidence that the above information was disclosed on the filing date of this patent application, the above background information should not be used to evaluate the novelty and inventiveness of this application. Utility Model Content

[0006] The main purpose of this utility model is to provide an expansion tank and valve cover with good coolant flow, easy disassembly and assembly, and good sealing effect.

[0007] Therefore, this utility model proposes an expansion tank and valve cover.

[0008] Preferably, the present invention may also have the following technical features:

[0009] An expansion tank includes a tank body comprising an upper tank and a lower tank, the upper and lower tanks being welded together as a single structure. The tank body has an internal partition plate dividing it into a first tank and a second tank, each with a first valve cover for opening and closing. The second tank has a second valve cover for opening and closing. The expansion tank is characterized by:

[0010] The top of the first box has a first opening, which is divided into several unit chambers. Two adjacent unit chambers are connected. The upper end of each unit chamber is connected to the top surface of the upper box and the lower end is connected to the bottom surface of the lower box. The upper end of one unit chamber in the middle is attached to the perimeter of the first opening. Multiple unit chambers are distributed around the central unit chamber.

[0011] The top of the second box is provided with a second box opening, and its internal structure is symmetrical to the internal structure of the first box with the rib plate as the center line.

[0012] Furthermore, the central unit chamber has a cylindrical or near-cylindrical structure.

[0013] Furthermore, the first box body is integrated with several stiffening plates that divide the first box body into 4-6 small unit chambers, and adjacent unit chambers are connected by long strip-shaped perforations.

[0014] Furthermore, the stiffening plates connecting adjacent unit rooms are provided with several perforations of different heights in sequence along the height direction, so that the total length of the perforations is 3 / 4 to 4 / 5 of the height of the stiffening plate.

[0015] Furthermore, the mating surfaces of the upper and lower housings are provided with several tongue-and-groove tenon structures at different angles.

[0016] Furthermore, it includes two stiffening plates with a gap between them, which together with the upper and lower boxes form a cavity.

[0017] A valve cover for the aforementioned expansion tank includes a screw cap, a sealing gasket, and an air intake / exhaust mechanism. The lower part of the inner side of the screw cap is a cavity, and the upper part is provided with an internally threaded section for connecting to the expansion tank opening. The air intake / exhaust mechanism is also installed inside the screw cap. The sealing gasket is sleeved on the outer side of the air intake / exhaust mechanism. The air intake / exhaust mechanism includes a mounting bracket, and an air intake assembly and an air exhaust assembly mounted on the mounting bracket.

[0018] The air intake assembly includes an air intake spring, a connecting shaft, an adjusting plate, and a pressure plate. The upper part of the mounting bracket has a through hole for mounting the connecting shaft. The upper end of the connecting shaft is provided with the pressure plate, the lower end is provided with the adjusting plate, and the outer side is also fitted with the air intake spring. The upper end of the air intake spring abuts against the lower side of the partition, and the lower end abuts against the adjusting plate.

[0019] The exhaust assembly is installed on the side of the intake assembly and includes a bushing, an exhaust spring, and a spindle. The bottom of the bushing has a radial limiting surface, and the upper part is installed on a partition plate, forming an assembly space for assembling the spindle. The spindle is located directly below the exhaust through hole. The upper end of the exhaust spring is sleeved on the lower part of the spindle, and the lower end abuts against the bottom of the bushing.

[0020] Furthermore, the mounting bracket includes a lower cavity, an upper cavity, and a partition. The partition is provided between the upper cavity and the lower cavity, and the partition has an air inlet and an exhaust outlet that connect the upper cavity and the lower cavity.

[0021] Furthermore, the partition plate has an upward protrusion at the position corresponding to the spindle, the top surface of the protrusion has the exhaust hole, and the interior has a guide cavity that connects the exhaust hole and the assembly space.

[0022] Furthermore, the internal thread section is provided with at least one axial ventilation groove.

[0023] The advantages of this invention compared to existing technologies include: multiple smaller unit chambers are distributed around the central unit chamber, and the perforated flow area is relatively large, which is beneficial for coolant flow. The intake and exhaust mechanisms and exhaust components are installed by snap-fit, making them easy to assemble and disassemble; the installation position of the sealing gasket not only seals the expansion tank opening but also further stabilizes the connection between the intake and exhaust mechanisms and the screw cap. Attached Figure Description

[0024] Figure 1 This is a three-dimensional view of the expansion tank of this utility model.

[0025] Figure 2 This is a top view of the present invention.

[0026] Figure 3 yes Figure 2 BB-direction sectional view.

[0027] Figure 4 This is the front view of this utility model.

[0028] Figure 5 yes Figure 4 A sectional view along the AA direction.

[0029] Figure 6 This is a partial sectional view of the expansion tank of this utility model.

[0030] Figure 7 This is a sectional view of the valve cover of this utility model.

[0031] Figure 8 This is a perspective view of the valve cover of this utility model.

[0032] Figure 9 This is a perspective view of the valve cover air intake and exhaust mechanism of this utility model.

[0033] Figure 10 This is a perspective view of the valve cover air intake and exhaust mechanism of this utility model.

[0034] Figure 11 This is a perspective view of the screw cap of this utility model. Detailed Implementation

[0035] The present invention will now be described in further detail with reference to specific embodiments and the accompanying drawings. It should be emphasized that the following description is merely exemplary and is not intended to limit the scope and application of the present invention.

[0036] Non-limiting and non-exclusive embodiments will be described with reference to the following figures, wherein the same reference numerals denote the same parts unless otherwise specifically stated.

[0037] like Figures 1-6 The expansion tank shown includes a tank body 100, which comprises an upper tank 101 and a lower tank 102, which are welded together to form a single structure. The tank body 100 has an internal partition plate 1015 that divides it into a first tank and a second tank. A first valve cover 1011 is installed on the top of the first tank, used to open and close it. A second valve cover 1012 is installed on the top of the second tank, used to open and close it.

[0038] Specifically, the first housing has a first opening at its top, and its interior is divided into several unit chambers, with adjacent unit chambers connected to each other. The upper end of each unit chamber is connected to the top surface of the upper housing 101, and the lower end is connected to the bottom surface of the lower housing 102. The first opening is externally threaded to the first valve cover 1011. The upper end of a central unit chamber 1014 is attached to the perimeter of the first opening, and 4-6 unit chambers are distributed around the central unit chamber 1014. Preferably, the central unit chamber 1014 has a cylindrical or near-cylindrical structure.

[0039] The first housing is divided into six small unit chambers by a number of reinforcing ribs 1013. Adjacent unit chambers are connected by elongated perforations 1017. Preferably, the reinforcing ribs connecting adjacent unit chambers have a number of perforations 1017 of different heights in sequence along their height direction, such that the total length of the perforations on the reinforcing rib is 3 / 4 to 4 / 5 of the height of the reinforcing rib, providing a relatively sufficient flow area.

[0040] More specifically, the mating surfaces of the upper housing 101 and the lower housing 102 are provided with several tenon-and-groove structures at different angles to prevent displacement of the upper housing 101 and the lower housing 102 during the welding process and improve the mating accuracy of the upper housing 101 and the lower housing 102. Optionally, several tenons 1012 are provided at the upper end of the lower housing 102, and recesses 1019 are opened at the positions of the corresponding tenons 1012 on the upper housing. More preferably, the recesses 1019 are connected to the through holes opened in the upper housing 101, and the width of the recesses 1019 is the same as the width of the through holes opened in the upper housing 101.

[0041] Preferably, the tank has two rib plates 1015 with a gap between them, forming a cavity 1016 with the upper tank body 101 and the lower tank body 102. The upper part of the water tank body 100 is provided with a liquid inlet 103, and the lower part is provided with a liquid outlet 104.

[0042] In some embodiments, the axes of the perforations that open in the same unit chamber and connect to other adjacent unit chambers are staggered as much as possible.

[0043] The top of the second housing is provided with a second opening, and the second opening is provided with an external thread for connecting the second valve cover 1021. Furthermore, the internal structure of the second housing and the internal structure of the first housing are symmetrical about the rib plate 1015 as the center line.

[0044] like Figures 7-11 The diagram shows an expansion tank valve cover, applied to the aforementioned expansion tank. It includes a cap 1, a sealing gasket 4, and an air intake / exhaust mechanism. The lower inner part of the cap 1 is a cavity 9, and the upper part has an internally threaded section 3 connecting to the expansion tank opening. The air intake / exhaust mechanism is installed inside the cap 1. The sealing gasket 4 is fitted onto the outer side of the air intake / exhaust mechanism. The outer diameter of the sealing gasket 4 is smaller than the inner diameter of the cavity 9, and its upper side abuts against the lower side of the internally threaded section 3. The air intake / exhaust mechanism includes a mounting bracket 5, and an air intake assembly 6 and an air exhaust assembly 7 mounted on the mounting bracket 5. The mounting bracket 5 includes a lower cavity, an upper cavity, and a partition. A partition 52 is provided between the upper and lower cavities, dividing the tubular mounting bracket 5 into upper and lower parts. The partition 52 has an air intake hole and an air exhaust hole 53 connecting the upper and lower cavities.

[0045] The air intake assembly includes an air intake spring 63, a connecting shaft 65, an adjusting plate 61, and a pressure plate 64. The connecting shaft 65 is slidably installed in the air intake hole, with the pressure plate 64 integrated at its upper end and the adjusting plate 61 at its lower end. The air intake spring 63 is also sleeved on the outside of the connecting shaft 65. The upper end of the air intake spring 63 abuts against the lower side of the partition 52, and the lower end abuts against the adjusting plate 61. Under normal conditions, the adjusting plate 61 tends to move downward due to the elastic force of the air intake spring 63, causing the lower side of the pressure plate 64 and the upper side of the partition 52 to fit tightly together, achieving a sealing effect. Preferably, it also includes a first sealing ring 62. The lower side of the pressure plate 64 has a first sealing groove for assembling the first sealing ring 62, enhancing the sealing effect. Mounting grooves are respectively provided on the adjusting plate 61 and the partition 52 for connecting the air intake spring 63, preventing the air intake spring 63 from shifting radially during use and affecting the seal.

[0046] The exhaust assembly is installed to the side of the intake assembly and includes a bushing 59, an exhaust spring 71, and a spindle 58. The bottom of the bushing 59 has a radial limiting surface, and its upper part is fixed to the partition plate 52 by a snap-fit. The bushing 59 and the partition plate 52 form an assembly space for assembling the spindle 58, and the spindle 58 is located directly below the exhaust through-hole 53. The upper end of the exhaust spring 71 is sleeved on the lower part of the spindle 58, and its lower end abuts against the bottom of the bushing 59. Under normal conditions, the spindle 58, under the elastic force of the exhaust spring 71, abuts against the lower side of the partition plate 52 and seals the exhaust through-hole 53. Preferably, the upper side of the spindle is also provided with a positioning shaft 55 and a second sealing gasket 56. The positioning shaft 55 is arranged along the axial direction of the spindle, and the second sealing gasket 56 is fitted on its outer side, which can effectively improve the sealing effect.

[0047] Preferably, to reduce the length of the bushing 59 and improve stability, the partition plate 52 is made into an upward protrusion 72 corresponding to the position of the mandrel 58. The top surface of the protrusion 72 is provided with the vent hole 53, and the interior is provided with a guide cavity connecting the vent hole 53 and the assembly space. Preferably, the lower side of the protrusion 72 also has a second sealing groove surrounding the vent hole 53, and a second sealing ring 57 is installed in the second sealing groove. The mandrel 58 is pushed towards the vent hole 53 by the vent spring 71, so that the upper side of the mandrel 58 abuts against the second sealing ring 57, further improving the sealing effect on the vent hole 53.

[0048] Furthermore, the upper end of the bushing 59 is engaged with the partition plate 52. For example, the lower extension of the partition plate 52 has an annular lug 74, the inner side of which is provided with a first annular groove 75. The lower end of the first annular groove 75 is transitionally connected to an arc-shaped surface opposite to it, making the cross-section of the lug 74 have an "S" shaped structure. Correspondingly, the upper end of the bushing 59 is provided with an outwardly turned flange 591, which is an arc-shaped surface. Thus, when installing the exhaust assembly, firstly, the exhaust spring 71 is installed on the spindle 58, and then the lower end of the exhaust spring 71 is installed on the bottom of the bushing 59; then, the upper part of the bushing 59 is aligned with the annular lug 74, and forcefully pushed upward to engage the flange 591 of the bushing 59 into the first annular groove 75, thereby installing the bushing 59 on the partition plate 52. At the same time, the spindle 58 is pushed upward against the second sealing ring 57 by the elastic force of the exhaust spring 71.

[0049] More specifically, the bushing 59 has several vent holes 76 at its bottom or around its perimeter. When the pressure inside the expansion tank is too high, the pressure inside the expansion tank applies pressure to the upper side of the second sealing gasket 56 or the positioning shaft 55, and the exhaust spring 71 is further compressed, causing the upper side of the spindle 58 and the second sealing ring 57 to separate and form a venting slit. At this time, the air pressure inside the expansion tank is released through the venting slit, and the discharged air enters the bottom of the cap 1 through the vent holes 76 of the bushing 59 and is then discharged into the atmosphere.

[0050] In some embodiments, the mounting bracket 5 is a variable-diameter straight-through structure, smaller at the top and larger at the bottom. An annular limiting shoulder 51 is provided on the outer side of the mounting bracket 5, and the sealing gasket 4 is mounted on the limiting shoulder 51. Several limiting plates 8 are spaced around the bottom of the cap 1, with one side of each limiting plate 8 abutting against the lower part of the mounting bracket 5 and the upper side abutting against the lower side of the shoulder 51. Thus, the mounting bracket 5 is tightly connected to the limiting plates 8, fixing the mounting bracket 5 inside the cap 1. When the cap 1 is installed into the expansion tank, the tank opening presses against the sealing gasket 4, and the limiting plates 8 support the limiting shoulder 51, increasing the rigidity of the limiting shoulder 51 and effectively preventing deformation. Preferably, the lower part of the mounting bracket 5 also has several vents 54.

[0051] The internal thread section 3 has at least one axial ventilation groove 2, which is arranged along the length of the cap 1, dividing the annular internal thread section 3 into several segments. During exhaust, the air inside the expansion tank enters the bottom of the cap 1 and is discharged into the atmosphere through the ventilation groove 2; during intake, the air enters the bottom of the cap 1 from the exhaust groove 2 and enters the expansion tank through the intake hole.

[0052] Those skilled in the art will recognize that numerous variations are possible with respect to the above description, and the embodiments and figures are merely for describing one or more specific implementations.

[0053] Although exemplary embodiments of the present invention have been described and illustrated, those skilled in the art will understand that various changes and substitutions can be made thereto without departing from the spirit of the present invention. Furthermore, many modifications can be made to adapt specific situations to the doctrine of the present invention without departing from the central concept of the present invention described herein. Therefore, the present invention is not limited to the specific embodiments disclosed herein, but may include all embodiments and equivalents that fall within the scope of the present invention.

Claims

1. An expansion water tank, comprising a water tank body, the water tank body comprising an upper tank body and a lower tank body, an inner portion of the water tank body being provided with a partition rib plate, the partition rib plate separating the water tank body into a first tank body and a second tank body which are independent of each other, a top portion of the first tank body being provided with a first valve cover for opening and closing the first tank body, a top portion of the second tank body being provided with a second valve cover for opening and closing the second tank body, characterized in that: the top portion of the first tank body is provided with a first tank opening, an inner portion of the first tank opening being separated into a plurality of unit chambers, and two adjacent unit chambers are communicated with each other, an upper end of each unit chamber being connected to a top surface of the upper tank body, and a lower end of each unit chamber being connected to a bottom surface of the lower tank body, an upper end of a unit chamber located in a middle portion being combined with a periphery of the first tank opening, and a plurality of unit chambers being distributed around the unit chamber located in the middle portion; an inner structure of the second tank body is symmetrical to an inner structure of the first tank body with the partition rib plate as a middle line. The unit chamber located in the middle portion is in a cylindrical or near-cylindrical structure. The first tank body is integrated with a plurality of rib plates to separate the first tank body into 4-6 small unit chambers, and adjacent unit chambers are communicated with each other through long strip-shaped perforations.

2. The expansion tank according to claim 1, characterized in that: The height direction of the rib plate communicating adjacent unit chambers is sequentially provided with a plurality of perforations of different heights, so that the total length of the perforations is 3 / 4-4 / 5 of the height of the rib plate.

3. The expansion tank of claim 1, wherein: The joint surface of the upper tank body and the lower tank body is provided with a plurality of concave-convex tenon structures of different angles for butt joint.

4. The expansion tank of claim 3, wherein: The two partition rib plates have a space therebetween, and the upper tank body and the lower tank body form a cavity.

5. The expansion tank of claim 1, wherein: The air inlet and exhaust mechanism comprises a mounting bracket, and an air inlet assembly and an air exhaust assembly mounted on the mounting bracket.

6. The expansion tank of claim 1, wherein: The mounting bracket comprises a lower cavity, an upper cavity and a partition plate, the partition plate being provided between the upper cavity and the lower cavity, the partition plate being provided with an air inlet through hole and an air exhaust through hole for communicating the upper cavity and the lower cavity.

7. A valve cover for use in the expansion tank of claim 1, comprising a screw cap, a sealing gasket and an air inlet and exhaust mechanism, the inner side of the screw cap is provided with a cavity at the lower part and an inner threaded section at the upper part for connecting to the mouth of the expansion tank, and the air inlet and exhaust mechanism is installed inside the screw cap; the outer side of the air inlet and exhaust mechanism is provided with a sealing gasket, characterized in that: The air inlet assembly comprises an air inlet spring, a connecting shaft, an adjusting plate and a pressing plate, the upper portion of the mounting bracket being provided with a perforation for mounting the connecting shaft, the upper end of the connecting shaft being provided with the pressing plate, the lower end of the connecting shaft being provided with the adjusting plate, and the outer side of the connecting shaft being further sleeved with the air inlet spring, the upper end of the air inlet spring abutting against the lower side of the partition plate, and the lower end of the air inlet spring abutting against the adjusting plate. The air exhaust assembly is installed on the side of the air inlet assembly, and comprises a shaft sleeve, an air exhaust spring and a core shaft, the bottom portion of the shaft sleeve being provided with a radial limiting surface, the upper portion of the shaft sleeve being mounted on the partition plate and forming an assembly space with the partition plate for assembling the core shaft, the core shaft being located directly below the air exhaust through hole, the upper end of the air exhaust spring being sleeved with the lower portion of the core shaft, and the lower end of the air exhaust spring abutting against the bottom portion of the shaft sleeve. The partition plate is provided with an upward protrusion corresponding to the position of the core shaft, the top surface of the protrusion being provided with the air exhaust through hole, and the inner portion of the protrusion being provided with a guide cavity for communicating the air exhaust through hole and the assembly space. The internal thread section is provided with at least one axial ventilation groove.

8. A valve cover for an expansion tank as defined in claim 7, characterized in that: ​ 9. A valve cover for an expansion tank as defined in claim 7, characterized in that: ​

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