Integrated oil tank air pressure control valve

Abstract

The utility model relates to the technical field of oil tank air pressure control valves, in particular to an integrated oil tank air pressure control valve. Comprising a device shell, a valve cavity and an oil storage cavity are formed in the device shell, an air outlet is formed in the oil storage cavity, the device shell comprises an oil storage shell body, the oil storage cavity is formed in the oil storage shell body, and an outer cylinder which extends longitudinally and is provided with a downward opening and an outer flow channel inlet formed in the side wall of the outer cylinder are integrally arranged on the oil storage shell body corresponding to the lower portion of the bottom wall of the oil storage cavity; the first valve cavity cover is sealed at the opening end of the outer cylinder, an inner cylinder is arranged on the first valve cavity cover and arranged in the outer cylinder, the top of the inner cylinder is higher than the outer flow channel inlet, a flow guide separation cavity is formed between the outer cylinder and the inner cylinder in the radial direction and comprises an inner flow channel inlet in the lower end of the inner cylinder, and the outer flow channel inlet is higher than the inner flow channel inlet. The closing height of the oil tank is reduced compared with a combination valve in a traditional connection mode, and the effective capacity of the oil tank can be improved. The floating sensitivity of the floater is improved, and the closing timeliness of the main flow channel is guaranteed.

Description

TECHNICAL FIELD

[0001] The utility model relates to oil tank gas pressure control valve technical field, concretely relates to an integrated oil tank gas pressure control valve. BACKGROUND

[0002] As the necessary component of fuel-driven carrier, the oil tank is widely used in traditional fuel vehicles and electric hybrid (PHEV) vehicles. The oil tank system needs to use multiple exhaust valves to ensure the safety of the vehicle during static and driving processes. For the valve built in the oil tank, with the space limitation of the electric hybrid system oil tank, the oil tank develops in the direction of being more and more flat, which puts forward a lower closing height requirement for the built-in valve to meet the demand of refueling amount. The closing height of the oil tank is the distance from the oil liquid level to the top inside of the oil tank when the oil liquid level rises to the float in the exhaust valve and the float to the valve body air passage is closed,

[0003] At present, the combination valve needs to integrate the FLVV (liquid level control valve) to the bottom of the oil storage box shell. At this time, the oil storage box shell is equivalent to the upper cover of the FLVV shell. The shell and the upper cover of the FLVV need to be connected to set a sealing ring for sealing. The liquid inlet on the FLVV shell must be set below the sealing ring, which limits the closing height of the FLVV and causes the problems of complex assembly process and poor sealing. CONTENT OF THE UTILITY MODEL

[0004] In order to overcome the above-mentioned deficiencies of the prior art, the utility model provides an integrated oil tank gas pressure control valve, which reduces the closing height of the oil tank relative to the combination valve of the traditional connection form and can improve the effective capacity of the oil tank. The sensitivity of the first float rising is improved, and the timeliness of the main flow passage closing is ensured.

[0005] In order to achieve the above-mentioned purpose, the utility model is realized through the following technical scheme:

[0006] An integrated oil tank gas pressure control valve comprises a device shell, a valve cavity and an oil storage cavity are arranged in the device shell, the oil storage cavity is arranged above the valve cavity, an air outlet is arranged on the oil storage cavity, a flow channel is communicated between the valve cavity and the oil storage cavity, a longitudinally floating float is arranged in the valve cavity, and the opening of the flow channel near the valve cavity is arranged at the upper end position of the float floating stroke; a flow channel inlet communicated with the valve cavity is arranged on the device shell;

[0007] The valve cavity comprises a first valve cavity, the flow channel comprises a main flow channel between the first valve cavity and the oil storage cavity, and the float comprises a first float arranged in the first valve cavity;

[0008] The device shell comprises:

[0009] The oil storage shell is provided with an oil storage cavity, and a longitudinally extending and downwardly open outer cylinder is integrally arranged below the bottom wall of the oil storage cavity on the oil storage shell. The flow channel inlet includes an outer flow channel inlet arranged on the side wall of the outer cylinder.

[0010] The first valve cavity cover is sealed to the open end of the outer cylinder, and the first valve cavity is arranged in the cavity defined by the outer cylinder and the first valve cavity cover.

[0011] Further, the integrated oil tank gas pressure control valve in the application is provided with a longitudinally extending and upwardly open inner cylinder on the first valve cavity cover, the inner cylinder is arranged in the outer cylinder, the top of the inner cylinder is higher than the outer flow channel inlet, the first valve cavity is arranged in the inner cylinder, and the inner cylinder is used for limiting the range of the first valve cavity. The outer cylinder and the inner cylinder are provided with a flow guide partition cavity in the radial direction, the flow channel inlet includes an inner flow channel inlet arranged on the lower end of the side wall of the inner cylinder, and the outer flow channel inlet is higher than the inner flow channel inlet.

[0012] Further, the integrated oil tank gas pressure control valve in the application is provided with a liquid discharge fine hole on the bottom of the first valve cavity cover, which is communicated with the first valve cavity. As a preferred scheme of the application, when the liquid level in the oil tank is lower than the bottom end of the first valve cavity cover, the oil is discharged from the liquid discharge fine hole. It should be noted that the opening of the outer flow channel inlet and the inner flow channel inlet is much larger than that of the liquid discharge fine hole, so that the oil entering the first valve cavity to float the first float during the rising of the oil mainly comes from the flow channel inlet.

[0013] Further, the integrated oil tank gas pressure control valve in the application is provided with a gas discharge hole on the upper end of the side wall of the inner cylinder, and the gas discharge hole is circumferentially staggered with the outer flow channel inlet. As a preferred scheme of the application, before the first float cuts off the main flow channel, the gas in the oil tank mainly enters the gas discharge hole from the outer flow channel inlet and then enters the main flow channel and is discharged. The gas discharge hole is circumferentially staggered with the outer flow channel inlet, so as to prevent the oil from entering the first valve cavity from the gas discharge hole.

[0014] Further, the integrated oil tank gas pressure control valve in the application is provided with a pressure stabilizing gas hole on the side wall of the inner cylinder, and the pressure stabilizing gas hole is arranged opposite to the outer flow channel inlet. As a preferred scheme of the application, during the oil filling process, when the internal pressure of the oil tank rises sharply, the gas rapidly fills the first valve cavity from the liquid discharge fine hole, which may cause the first float to rise and cut off the main flow channel, resulting in false tripping. By arranging the pressure stabilizing gas hole opposite to the outer flow channel inlet on the inner cylinder, the upper end and the lower end of the first valve cavity are simultaneously filled with gas, so as to balance the longitudinal gas thrust on the first float and avoid false tripping. It should be noted that the opening of the pressure stabilizing gas hole is much smaller than that of the outer flow channel inlet, so that it is difficult for the oil to enter the first valve cavity from the pressure stabilizing gas hole.

[0015] Further, the integrated oil tank air pressure control valve in the application is provided with a first spring in the first valve cavity, and the first spring is in contact with the lower end of the first float. As a preferred solution of the application, the first spring is used to offset part of the downward resistance acting on the first float, so as to improve the sensitivity of the first float to the oil liquid.

[0016] Further, the integrated oil tank air pressure control valve in the application further comprises a solder pad, the top of the solder pad is provided with a soldering member, the device shell and the solder pad are provided with opposite connecting members, and the opposite connecting members are interlocked to realize the connection of the device shell to the lower end of the solder pad.

[0017] The connecting member comprises a plug plate arranged on the side of the solder pad, the plug plate extends downward, and the lower end of the plug plate is provided with a clamping protrusion, and the clamping protrusion is provided with a limiting surface.

[0018] The connecting member further comprises a clamping groove limiting plate and a one-way locking piece arranged on the device shell, the clamping groove limiting plate is provided with a clamping groove, the clamping groove extends transversely and one side of the extending end is open, the one-way locking piece is arranged outside the opening position of the clamping groove, and the lower end of the clamping groove limiting plate is provided with a limiting wall.

[0019] During the connection, the device shell and the solder pad are longitudinally in contact, the longitudinal positions of the plug plate, the clamping groove and the limiting surface and the limiting wall correspond to each other, the plug plate is arranged on the side of the one-way locking piece away from the clamping groove, the solder pad and the device shell are transversely moved to make the plug plate pass through the one-way locking piece and enter the clamping groove, and the limiting surface and the limiting wall are longitudinally attached to each other, at this time, the one-way locking piece is used to limit the transverse movement of the plug plate out of the clamping groove to realize the transverse locking of the solder pad and the device shell, and the limiting surface and the limiting wall are used to limit the longitudinal separation of the solder pad and the device shell. Therefore, the plug plate is transversely arranged in the clamping groove by adopting the mode of longitudinal positioning and then transverse movement locking, the plug plate is transversely locked by the one-way locking piece, the clamping protrusion and the limiting wall are longitudinally interlocked to limit the longitudinal separation of the solder pad and the device shell. The width of the clamping groove is adapted to the thickness of the plug plate, which has the advantage of good locking effect and can effectively avoid the risk of connection failure of the existing connection structure.

[0020] Further, the integrated oil tank air pressure control valve in the application is provided with a first spring in the first valve cavity, and the first spring is in contact with the lower end of the first float. As a preferred solution of the application, the first spring is used to offset part of the downward resistance acting on the first float, so as to improve the sensitivity of the first float to the oil liquid.

[0021] Further, the integrated oil tank air pressure control valve in the application is provided with a first spring in the first valve cavity, and the first spring is in contact with the lower end of the first float. As a preferred solution of the application, the first spring is used to offset part of the downward resistance acting on the first float, so as to improve the sensitivity of the first float to the oil liquid.

[0022] Further, the integrated oil tank air pressure control valve in the application, the side wall of the opening end of the clamping groove is provided with a guide slope; the guide slope extends outward and laterally towards the clamping groove, and the guide slope is arranged at the opposite side of the one-way locking piece. As a preferred scheme of the application, based on the above structure, when the plug enters the clamping groove, the side of the one-way locking piece away from the clamping groove and the guide slope are respectively used for correcting the deformation of the plug towards the two sides of the clamping groove.

[0023] Further, the integrated oil tank air pressure control valve in the application, the one-way locking piece corresponds to the position of the clamping convex, and the one-way locking piece limits the transverse movement of the plug out of the clamping groove by abutting against the clamping convex. As a preferred scheme of the application, because the side of the plug is relatively narrow, if the one-way locking piece abuts against the side of the plug, the one-way locking piece is prone to slip, and the side of the clamping convex is relatively wide, so that the limiting position is easily ensured.

[0024] The above technical scheme can achieve the following beneficial effects:

[0025] 1. The integrated oil tank air pressure control valve provided by the application, in the process of refueling the oil tank, the liquid level in the oil tank rises, when the liquid level exceeds the inlet of the outer flow channel, the oil enters the flow guide cavity from the inlet of the outer flow channel, and then enters the first valve cavity in the inner cylinder from the inlet of the inner flow channel, so as to lift the first float upwards until the first valve cavity is blocked on one side of the main flow channel, so as to cut off the main flow channel. At this time, continue to add oil, and the air pressure in the oil tank rises sharply, triggering the oil gun to jump. Because the outer cylinder, which is the shell of the first valve cavity (FLVV), is integrally arranged below the oil storage shell, the shell of the FLVV is integrated with the oil storage shell, therefore, the sealing ring required by the traditional split connection is saved, the closing height of the oil tank is reduced relative to the combined valve body in the traditional connection form, and the effective capacity of the oil tank can be improved.

[0026] 2. The integrated oil tank air pressure control valve provided by the application, because of the arrangement of the inner cylinder, the flow guide cavity is formed, the oil realizes downward flow in the flow guide cavity, and finally enters the first valve cavity from the inlet of the inner flow channel to lift the first float upwards, so as to close the main flow channel, thereby improving the sensitivity of the first float to lift and ensuring the timeliness of the closure of the main flow channel. BRIEF DESCRIPTION OF DRAWINGS

[0027] Figure 1 It is an internal structure sectional view of the integrated oil tank air pressure control valve in the embodiment of the application;

[0028] Figure 2 It is an internal structure sectional view of the integrated oil tank air pressure control valve in the embodiment of the application; Figure 1

[0029] Figure 3 It is a schematic view of the oil storage shell in the embodiment of the application;

[0030] ​Figure 4 Figure 1 is a schematic view of a first valve cavity cover of an integrated oil tank air pressure control valve according to an embodiment of the present application;

[0031] Figure 5 Figure 2 is a top view of a device housing connected to a pad according to an embodiment of the present application;

[0032] Figure 6 Figure 3 is a schematic view of a structure of a pad according to an embodiment of the present application;

[0033] Figure 7 Figure 4 is a top view of a device housing according to an embodiment of the present application

[0034] Figure 8 Figure 5 is a schematic view of a first valve cavity cover according to an embodiment of the present application; Figure 7 Figure 6 is a partial enlarged view of a circle A region in Figure 5;

[0035] Figure 9 Figure 7 is a sectional view along A-A direction in Figure 5; Figure 5

[0036] Figure 8 is a partial enlarged view of a circle B region in Figure 5. Figure 10 Figure 9 Figure 9 is a schematic view of a device housing according to an embodiment of the present application;

[0037] Figure 10 is a schematic view of a device housing according to an embodiment of the present application;

[0038] 1 - pad; 11 - bump;

[0039] 2 - device housing; 22 - first valve cavity; 221 - main flow passage; 24 - oil storage cavity; 241 - air outlet; 25 - oil storage housing; 251 - outer cylinder; 252 - outer flow passage inlet; 26 - first valve cavity cover; 260 - flow guide partition cavity; 261 - inner cylinder; 262 - inner flow passage inlet; 263 - liquid discharge fine hole; 264 - air discharge hole; 265 - pressure stabilizing air hole;

[0040] 311 - clamping groove; 3111 - lead-in slope; 312 - one-way lock plate; 32 - insertion plate; 33 - clamping convex; 330 - limiting surface; 34 - limiting wall; 35 - clamping groove limiting plate; 36 - limiting frame; 360 - placement slot;

[0041] 41 - first float; 51 - first spring. DETAILED DESCRIPTION

[0042] Embodiment 1

[0043] In combination with Figures 1 to 4 ​The integrated oil tank air pressure control valve comprises a device shell 2, a valve cavity and an oil storage cavity 24 are arranged in the device shell 2, the oil storage cavity 24 is arranged above the valve cavity, an air outlet 241 is arranged on the oil storage cavity 24, a flow channel is communicated between the valve cavity and the oil storage cavity 24, a longitudinal floating float is arranged in the valve cavity, and an opening of the flow channel near the valve cavity is arranged at an upper end position of a floating stroke of the float; the device shell 2 is provided with a flow channel inlet communicated with the valve cavity;

[0044] The valve cavity comprises a first valve cavity 22, the flow channel comprises a main flow channel 221 between the first valve cavity 22 and the oil storage cavity 24, and the float comprises a first float 41 arranged in the first valve cavity 22.

[0045] The device shell 2 comprises:

[0046] An oil storage shell 25, the oil storage cavity 24 is arranged in the oil storage shell 25, a longitudinal extension and downward opening outer cylinder 251 is integrally arranged below the oil storage cavity 24 bottom wall on the oil storage shell 25, and the flow channel inlet comprises an outer flow channel inlet 252 arranged on the side wall of the outer cylinder 251;

[0047] A first valve cavity cover 26, the first valve cavity cover 26 is sealed to the opening end of the outer cylinder 251, and the first valve cavity 22 is arranged in a cavity defined by the outer cylinder 251 and the first valve cavity cover 26.

[0048] Based on the above device, the integrated oil tank air pressure control valve in the embodiment, in the process of refueling the oil tank, the liquid level in the oil tank rises, when the liquid level exceeds the outer flow channel inlet 252, the oil enters the flow guide partition cavity 260 from the outer flow channel inlet 252, and then enters the first valve cavity 22 in the inner cylinder 261 from the inner flow channel inlet 262, so as to float the first float 41 upwards, and then block the opening of the main flow channel 221 near the first valve cavity 22, so as to cut off the main flow channel 221. At this time, continue to add oil, the air pressure in the oil tank rises sharply, and the oil gun is triggered. Since the outer cylinder 251 of the first valve cavity 22, that is, the FLVV shell is integrally arranged below the oil storage shell 25, that is, the shell of the FLVV and the oil storage shell 25 are integrated, therefore, the sealing ring required by the traditional split connection is saved, the closing height of the oil tank is reduced relative to the combined valve body in the traditional connection form, and the effective capacity of the oil tank can be improved.

[0049] In order to improve the opening height of the FLVV, the height of the FLVV inlet is often greater than the height when the float is not floated, which causes the oil to enter the valve cavity from top to bottom, and exerts a downward pressure on the float, affecting the sensitivity of the float floating, and causing the valve air passage to close. To this end, further, in the first valve cavity cover 26, the inner cylinder 261 is provided with a longitudinal extension and an upward opening, the inner cylinder 261 is arranged in the outer cylinder 251, the top of the inner cylinder 261 is higher than the outer flow passage inlet 252, the first valve cavity 22 is arranged in the inner cylinder 261, the inner cylinder 261 is used to limit the range of the first valve cavity 22, the outer cylinder 251 and the inner cylinder 261 are provided with a flow guide separation chamber 260 between the radial direction, the flow passage inlet includes an inner flow passage inlet 262 arranged at the lower end of the side wall of the inner cylinder 261, and the outer flow passage inlet 252 is higher than the inner flow passage inlet 262. Due to the arrangement of the inner cylinder 261, the flow guide separation chamber 260 is formed, and the oil liquid realizes downward flow in the flow guide separation chamber 260, and finally enters the first valve cavity 22 from the inner flow passage inlet 262 to float the first float 41 from bottom to top, so as to close the main flow passage 221, thereby improving the sensitivity of the first float 41 floating and ensuring the timeliness of the main flow passage 221 closing.

[0050] In combination Figure 1 As shown in the drawings, in the first valve cavity cover 26, the bottom is provided with a drainage fine hole 263 communicating with the first valve cavity 22. When the oil level in the oil tank drops below the bottom end of the first valve cavity cover 26, the oil is discharged from the drainage fine hole 263. It should be noted that the opening of the outer flow passage inlet 252 and the inner flow passage inlet 262 is much larger than the drainage fine hole 263, so that the oil liquid entering the first valve cavity 22 to float the first float 41 during the rising process of the oil liquid mainly comes from the flow passage inlet.

[0051] In the embodiment, the upper end of the side wall of the inner cylinder 261 is provided with an exhaust hole 264, and the exhaust hole 264 is circumferentially offset from the outer flow passage inlet 252.

[0052] Before the first float 41 cuts off the main flow passage 221, the gas in the oil tank mainly enters the exhaust hole 264 from the outer flow passage inlet 252 and then enters the main flow passage 221 and is discharged. The exhaust hole 264 is circumferentially offset from the outer flow passage inlet 252, in order to prevent oil from entering the first valve cavity 22 from the exhaust hole 264.

[0053] During the refueling process, when the gas pressure in the tank rises sharply, the gas rapidly fills the first valve cavity 22 from the drain hole 263, causing the first float 41 to rise, resulting in the main flow passage 221 being cut off, causing the gun to be mistakenly fired. To this end, in the present embodiment, a pressure stabilizing hole 265 is provided on the side wall of the inner cylinder 261, and the pressure stabilizing hole 265 is arranged opposite the outer flow passage inlet 252. By providing the pressure stabilizing hole 265 opposite the outer flow passage inlet 252 on the inner cylinder 261, the upper end and the lower end of the first valve cavity 22 are simultaneously supplied with gas, so as to balance the longitudinal gas thrust on the first float 41, thereby avoiding the gun being mistakenly fired. It should be noted that the opening of the pressure stabilizing hole 265 is much smaller than the outer flow passage inlet 252, so that it is difficult for oil to enter the first valve cavity 22 from the pressure stabilizing hole 265.

[0054] In the present embodiment, a first spring 51 is arranged in the first valve cavity 22, and the first spring 51 abuts against the lower end of the first float 41. The first spring 51 is used to offset part of the downward resistance acting on the first float 41, so as to improve the sensitivity of the first float 41 to be floated by the oil.

[0055] Embodiment 2

[0056] The existing connection form of the valve body in the tank and the tank adopts a solder pad with a buckle. The solder pad is welded to the top of the inner cavity of the tank, and the device shell is longitudinally clamped with the buckle on the solder pad to connect the device to the tank. However, the corresponding clamping groove of the longitudinal clamping buckle needs to allow the protrusion at the front end of the buckle to pass through first, so the opening of the clamping groove is often larger than the connecting plate at the upper end of the buckle. However, during the welding of the solder pad and the tank, the connecting plate will deform due to heat. Since the opening of the clamping groove is larger than the connecting plate, space is left for the deformation of the connecting plate, resulting in loose clamping of the buckle with the edge of the clamping groove after connection, and there is a risk of connection failure.

[0057] To this end, in combination with the device shell 2 shown in Figures 5 to 10 The present embodiment also includes a solder pad 1, and the top of the solder pad 1 is provided with a soldering member. The device shell 2 and the solder pad 1 are provided with opposite connecting members, and the opposite connecting members are interlocked to achieve the connection of the device shell 2 to the lower end of the solder pad 1.

[0058] The connecting member includes a plug plate 32 arranged on the side of the solder pad 1, and the plug plate 32 extends downward. The lower end of the plug plate 32 is provided with a clamping protrusion 33, and the clamping protrusion 33 is provided with a limiting surface 330.

[0059] The connecting member also includes a clamping groove limiting plate 35 and a one-way locking piece 312 arranged on the device shell 2. The clamping groove limiting plate 35 is provided with a clamping groove 311, and the clamping groove 311 extends horizontally and has an opening on one side of the extending end. The one-way locking piece 312 is arranged outside the opening position of the clamping groove 311. The lower end of the clamping groove limiting plate 35 is provided with a limiting wall 34.

[0060] In the connection, the device housing 2 and the welding pad 1 are longitudinally abutted, the plug plate 32 is correspondingly arranged at the longitudinal position of the clamping groove 311 and the limiting face 330 and the limiting wall 34, the plug plate 32 is arranged at the side away from the clamping groove 311 of the one-way locking sheet 312, and the welding pad 1 and the device housing 2 are transversely moved to the plug plate 32 to pass through the one-way locking sheet 312 into the clamping groove 311, and the limiting face 330 and the limiting wall 34 are longitudinally attached. At this time, the one-way locking sheet 312 is used to limit the transverse movement of the plug plate 32 out of the clamping groove 311 to realize the transverse locking of the welding pad 1 and the device housing 2, and the limiting face 330 and the limiting wall 34 are used to limit the longitudinal separation of the welding pad 1 and the device housing 2. Specifically, the welding member includes a group of arrayed protrusions 11. Therefore, the plug plate 32 is transversely inserted into the clamping groove 311 by the way of longitudinal abutting positioning and then transverse movement locking, the plug plate 32 is transversely locked by the one-way locking sheet 312, and the clamping protrusion 33 and the limiting wall 34 are longitudinally interlocked to limit the longitudinal separation of the welding pad 1 and the device housing 2. The width of the clamping groove 311 is adapted to the thickness of the plug plate 32, and has the advantages of good locking effect, which can effectively avoid the risk of connection failure of the existing connection structure.

[0061] In combination Figure 8 As shown in the embodiment, the connecting member is arranged on both sides of the welding pad 1 and the device housing 2 in pairs and arranged in two groups in the extension direction of the clamping groove 311 to improve the stability of the connection.

[0062] In the embodiment, in the longitudinal projection, the root of the one-way locking sheet 312 is arranged at one side of the clamping groove 311, and the one-way locking sheet 312 is arranged to extend obliquely towards the opening end of the clamping groove 311. In addition, the side wall of the opening end of the clamping groove 311 is provided with a guide slope 3111. The guide slope 3111 extends towards the outside and the side of the clamping groove 311, and the guide slope 3111 is arranged at the opposite side of the one-way locking sheet 312. Based on the above structure, when the plug plate 32 enters the clamping groove 311, the side of the one-way locking sheet 312 away from the clamping groove 311 and the guide slope 3111 are respectively used to correct the deformation of the plug plate 32 towards the two sides of the clamping groove 311.

[0063] In combination Figure 10 As shown in the embodiment, in the connection, the position of the one-way locking sheet 312 corresponds to the clamping protrusion 33, and the one-way locking sheet 312 limits the transverse movement of the plug plate 32 out of the clamping groove 311 by abutting against the clamping protrusion 33. Since the side of the plug plate 32 is relatively narrow, it is easy to slip if the one-way locking sheet 312 abuts against the side of the plug plate 32, and the side of the clamping protrusion 33 is relatively wide to easily ensure the limiting.

[0064] In combination Figure 8As shown, the limiting frame 36 is internally provided with an insertion groove 360, which is arranged on the side of the one-way locking piece 312 away from the clamping groove 311 and opens towards the side of the one-way locking piece 312. During connection, the plug-in plate 32 is first longitudinally inserted into the insertion groove 360 to realize positioning before transverse movement, and then transversely moves from the insertion groove 360 to pass through the clamping groove 311 and enter the one-way locking piece 312. In this embodiment, the solder pad 1 abuts against the end face of the limiting frame 36 to realize longitudinal positioning of the solder pad 1 and the device shell 2.

[0065] The technical principles of the present application are described above in combination with specific embodiments, and these descriptions are only for explaining the principles of the present application and cannot be interpreted in any way as limiting the protection scope of the present application. Based on the explanations herein, other specific embodiments of the present application can be conceived by those skilled in the art without creative labor, and these embodiments will all fall within the protection scope of the present application.

Claims

1. An integrated oil tank air pressure control valve, comprising a device housing (2), a valve cavity and an oil storage cavity (24) are arranged in the device housing (2), the oil storage cavity (24) is arranged above the valve cavity, an air outlet (241) is arranged on the oil storage cavity (24), a flow channel is communicated between the valve cavity and the oil storage cavity (24), a longitudinally floating float is arranged in the valve cavity, and an opening of the flow channel near the valve cavity is arranged at an upper end position of a floating stroke of the float; a flow channel inlet communicated with the valve cavity is arranged on the device housing (2); the valve cavity comprises a first valve cavity (22), the flow channel comprises a main flow channel (221) between the first valve cavity (22) and the oil storage cavity (24), and the float comprises a first float (41) arranged in the first valve cavity (22); characterized in that the device housing (2) comprises: an oil storage shell (25), the oil storage cavity (24) is arranged in the oil storage shell (25), a longitudinally extending and downwardly opening outer cylinder (251) is integrally arranged below a bottom wall of the oil storage cavity (24) on the oil storage shell (25), and the flow channel inlet comprises an outer flow channel inlet (252) arranged on a side wall of the outer cylinder (251); a first valve cavity cover (26) is sealed to an opening end of the outer cylinder (251), and the first valve cavity (22) is arranged in a cavity defined by the outer cylinder (251) and the first valve cavity cover (26).

2. An integrated oil tank air pressure control valve according to claim 1, characterized in that: a longitudinally extending and upwardly opening inner cylinder (261) is arranged on the first valve cavity cover (26), the inner cylinder (261) is arranged in the outer cylinder (251), a top of the inner cylinder (261) is higher than the outer flow channel inlet (252), the first valve cavity (22) is arranged in the inner cylinder (261), the inner cylinder (261) is used for limiting the range of the first valve cavity (22), a flow guide partition cavity (260) is arranged between the outer cylinder (251) and the inner cylinder (261) in a radial direction, the flow channel inlet comprises an inner flow channel inlet (262) arranged at a lower end of a side wall of the inner cylinder (261), and the outer flow channel inlet (252) is higher than the inner flow channel inlet (262).

3. An integrated oil tank air pressure control valve according to claim 2, characterized in that: a drain hole (263) communicated with the first valve cavity (22) is arranged at a bottom of the first valve cavity cover (26).

4. The integrated oil tank air pressure control valve of claim 2, wherein: an air vent hole (264) is arranged at an upper end of a side wall of the inner cylinder (261), and the air vent hole (264) is circumferentially staggered with the outer flow channel inlet (252).

5. The integrated oil tank air pressure control valve of claim 2, wherein: a pressure stabilizing hole (265) is arranged on the side wall of the inner cylinder (261), and the pressure stabilizing hole (265) is arranged opposite to the outer flow channel inlet (252).

6. An integrated oil tank air pressure control valve according to claim 1, characterized in that: a first spring (51) is arranged in the first valve cavity (22), and the first spring (51) abuts against a lower end of the first float (41).

7. An integrated oil tank air pressure control valve according to claim 1, wherein: a solder pad (1) is further provided, a soldering member is arranged at a top of the solder pad (1), opposite connecting members are arranged on the device housing (2) and the solder pad (1), and the opposite connecting members are interlocked to realize that the device housing (2) is connected to a lower end of the solder pad (1); the connecting member comprises a plug (32) arranged on a side of the solder pad (1), the plug (32) extends downwardly, a clamping protrusion (33) is arranged at a lower end of the plug (32), and a limiting surface (330) is arranged on the clamping protrusion (33). The connecting member further comprises a clamping groove limiting plate (35) and a one-way locking piece (312), the clamping groove limiting plate (35) is provided with a clamping groove (311), the clamping groove (311) extends horizontally and is open on one side of the extending end, the one-way locking piece (312) is arranged outside the opening position of the clamping groove (311), and the lower end of the clamping groove limiting plate (35) is provided with a limiting wall (34); During connection, the device shell (2) and the solder pad (1) are longitudinally abutted, the plug-in plate (32) corresponds to the longitudinal positions of the clamping groove (311) and the limiting wall (34), the plug-in plate (32) is arranged on the side, away from the clamping groove (311), of the one-way locking piece (312), the solder pad (1) and the device shell (2) are moved horizontally relative to each other until the plug-in plate (32) enters the clamping groove (311) through the one-way locking piece (312), the limiting wall (34) and the limiting face (330) are longitudinally attached, at this time, the one-way locking piece (312) is used for limiting the plug-in plate (32) from moving horizontally out of the clamping groove (311), and the limiting wall (34) and the limiting face (330) are used for limiting the solder pad (1) and the device shell (2) from being separated longitudinally.

8. An integrated oil tank air pressure control valve according to claim 7, characterized in that: The connecting member is arranged on both sides of the solder pad (1) and the device shell (2) in pairs and arranged in two groups in the extending direction of the clamping groove (311).

9. An integrated oil tank air pressure control valve according to claim 7, characterized in that: In the longitudinal projection, the root of the one-way locking piece (312) is arranged on one side of the clamping groove (311), and the one-way locking piece (312) extends obliquely towards the opening end of the clamping groove (311); the side wall of the opening end of the clamping groove (311) is provided with an import slope (3111); the import slope (3111) extends towards the outside and the side of the clamping groove (311), and the import slope (3111) is arranged on the opposite side of the one-way locking piece (312).

10. The integrated oil tank air pressure control valve of claim 7, wherein: During connection, the one-way locking piece (312) corresponds to the position of the clamping convex (33), and the one-way locking piece (312) limits the plug-in plate (32) from moving horizontally out of the clamping groove (311) by abutting against the clamping convex (33).

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