Pressure regulating valve structure

Abstract

The utility model discloses a pressure regulating valve structure which is characterized in that a high-pressure cavity and a low-pressure cavity are formed in a valve body, an annular convex part is formed on the inner side wall of the valve body at the contact position of the high-pressure cavity and a valve element, a fluid inlet is formed in the top of the high-pressure cavity, and a plurality of uniform first fluid outlets are formed in the side wall of the valve body at the joint of the high-pressure cavity and the low-pressure cavity; a second fluid outlet is formed in the bottom of the low-pressure cavity; the valve element is used for adjusting the pressure intensity between the high-pressure cavity and the low-pressure cavity. The deformable sealing piece covers and is fixed on the top wall of the valve core; the step part is formed on the upper portion of the side wall of the valve element, and the deformable sealing piece covers the step part; the elastic piece is fixed in the low-pressure cavity; the elastic piece base is fixed at the bottom of the low-pressure cavity; and when the valve element moves to an upper locking position, the annular convex part compresses the contact inclined surface of the deformable sealing element, so that the contact inclined surface deforms and forms surface contact, and sealing is formed between the deformable sealing element and the valve body. By changing the structure of the deformable sealing piece and the valve element, the sealing effect can be improved, and the pressure adjusting accuracy can be guaranteed.

Description

Technical Field

[0001] The utility model relates to the field of automobiles, in particular to a pressure regulating valve structure used for an oil pump bracket. Background Art

[0002] The pressure regulating valve is one of the essential components of the traditional low-pressure fuel pump bracket of automobiles. Its existence is to keep the pressure inside the fuel pump pipeline constant so that the car can start quickly in a short time. At the same time, it is used as a safety valve to release pressure when special circumstances such as blockage occur in the pipeline. As the country's requirements for automobile fuel evaporation emissions become higher and higher, more and more OEMs choose the configuration of on-demand fuel supply, which makes the pressure regulating valve of the low-pressure fuel pump more and more in a sealed state, and the sealing requirements for the pressure regulating valve are getting higher and higher.

[0003] The more common sealing form on the market now is rubber and metal sealing. The pressure regulating valve is composed of a filter, an O-ring, a valve body, a valve core, a rubber sealing pad, a spring and a spring seat. The working principle is: the pressurized oil enters the oil inlet chamber through the filter. When the oil pressure is less than the spring force, the valve core is squeezed by the elastic force to squeeze the rubber sealing pad, so that the rubber sealing pad and the valve body are in close contact, and the pressure regulating valve is in a sealed state; when the oil pressure is greater than the spring force, the oil pushes the valve core open, the rubber sealing pad and the side wall of the valve body are separated, and the oil is unloaded from the oil drain port on the side wall of the valve body. The effective sealing length is short because the rubber sealing pad touches the metal convex step on the side wall of the valve body. The leakage of the seal is high under long-term conditions. In addition, under high oil pressure conditions, due to the small sealing contact area, the pressure generated on the valve core is large, which can easily cause the rubber to rupture, thereby causing the seal to fail.

[0004] Chinese Patent 202022278723.1 discloses a pressure regulating valve structure, including: a valve body is formed with a high-pressure chamber and a low-pressure chamber, an annular convex portion is formed on the inner wall of the valve body at the contact position between the high-pressure chamber and the valve core, a pressure regulating valve inlet is formed on the top of the high-pressure chamber, a pressure regulating valve outlet is formed on the side wall of the valve body at the connection between the high-pressure chamber and the low-pressure chamber, and a low-pressure chamber outlet is formed at the bottom of the low-pressure chamber; the valve core is arranged in the valve body, and a second annular convex portion is formed on the periphery of its top surface; a deformable sealing member is fixed in the second annular convex portion of the top wall of the valve core; an elastic member is fixed in the low-pressure chamber, which forms an upward elastic force on the valve core; the base of the elastic member is fixed at the bottom of the low-pressure chamber, which is used to support and fix the elastic member. This solution increases the sealing contact area by deforming the deformable sealing member, improves the sealing effect and prolongs the service life. This solution only provides one sealing position, which has limited effect on improving the sealing effect and ensuring the accuracy of pressure regulation. Utility Model Content

[0005] A series of simplified concepts are introduced in the utility model content section, which are all simplifications of the prior art in the field, which will be further described in detail in the specific implementation section. The utility model content section of the utility model does not mean to attempt to define the key features and necessary technical features of the technical solution claimed for protection, nor does it mean to attempt to determine the scope of protection of the technical solution claimed for protection.

[0006] The technical problem to be solved by the utility model is to provide a pressure regulating valve structure which can improve the sealing effect and ensure the pressure regulating accuracy.

[0007] In order to solve the above technical problems, the utility model provides a pressure regulating valve structure, including:

[0008] The valve body is formed with a high-pressure chamber and a low-pressure chamber, an annular convex portion is formed on the inner wall of the valve body at the position where the high-pressure chamber contacts the valve core, a fluid inlet is formed at the top of the high-pressure chamber, a plurality of evenly arranged first fluid outlets are formed on the side wall of the valve body at the connection between the high-pressure chamber and the low-pressure chamber, and a second fluid outlet is formed at the bottom of the low-pressure chamber; the plurality is at least three;

[0009] A valve core is disposed in the valve body and is used for regulating the pressure between the high-pressure chamber and the low-pressure chamber;

[0010] A deformable sealing member, which covers and is fixed to the top wall of the valve core, and a portion of the deformable sealing member located at the periphery of the top wall of the valve core is formed into a contact inclined surface;

[0011] A step portion is formed on the upper part of the side wall of the valve core, and the deformable sealing member covers the step portion. When the valve core is not subjected to the elastic force of the elastic member, the deformable sealing member covering the step portion fills the space formed by the step portion and the side wall of the valve body;

[0012] An elastic member, which is fixed in the low-pressure chamber and exerts an upward elastic force on the valve core;

[0013] An elastic member base, which is fixed to the bottom of the low-pressure chamber and is used to support and fix the elastic member;

[0014] When the valve core moves to the upper locking position, the annular convex portion compresses the contact inclined surface of the deformable seal, causing the contact inclined surface to deform and form surface contact, thereby forming a seal between the deformable seal and the valve body.

[0015] Optionally, the pressure regulating valve structure is further improved, the top of the annular protrusion forms an arc surface, and the arc surface of the annular protrusion compresses the contact inclined surface of the deformable sealing element to form a deformable surface contact.

[0016] Optionally, the pressure regulating valve structure is further improved to further include: a guide portion formed on the top of the deformable sealing component, which is used to guide the inflowing fluid to the first fluid outlet.

[0017] Optionally, the pressure regulating valve structure is further improved, and the flow guide portion is a prism or pyramid formed on the top of the deformable sealing member.

[0018] Optionally, the pressure regulating valve structure is further improved, and a guide groove is formed on the side wall of the guide portion, and the end of the guide groove is aligned with the first fluid outlet.

[0019] Optionally, the pressure regulating valve structure is further improved so that the depth of the guide groove gradually increases from the top to the bottom.

[0020] Optionally, the pressure regulating valve structure is further improved to include:

[0021] A groove formed on an outer side wall of the valve body at an upper portion of the high pressure chamber;

[0022] A sealing member is mounted in the groove.

[0023] The pressure regulating valve structure provided by the utility model can at least achieve the following technical effects:

[0024] 1. The utility model improves the sealing effect by changing the structure of the deformable seal and the valve core, thereby ensuring the accuracy of the pressure regulation;

[0025] refer to Figure 1 The figure shows a schematic diagram of the valve core structure of the utility model, wherein the deformable sealing member is covered and fixed on the top surface and the step portion of the valve core (i.e., the metal substrate), and the portion of the deformable sealing member located at the periphery of the top wall of the valve core is formed into a contact inclined surface;

[0026] When the pressure regulating valve is closed, the annular convex part and the deformable seal form a deformable surface contact, that is, the annular convex part squeezes the deformable seal to seal the inlet oil. The deformable seal only needs to reach a certain compression rate to meet the sealing requirements, that is, to form the first sealing position.

[0027] The utility model designs a flow guide on the top of the deformable seal to guide the inflowing fluid to the first fluid outlet. When the fluid pressure reaches the design pressure and starts to push the spring to separate the deformable seal from the valve body, the fluid flows to the first fluid outlet through the flow guide to avoid the effect of sticking caused by rubber aging and ensure the accuracy of pressure regulation.

[0028] 2. The utility model forms a second sealing position by changing the structure of the deformable sealing member and the valve core, thereby further improving the sealing effect and further ensuring the accuracy of the pressure regulation.

[0029] refer to Figure 2As shown, a step portion is formed on the upper part of the side wall of the valve core of the utility model. When the valve core is not subjected to the elastic force of the elastic member, the deformable sealing member covering the step portion fills up the space formed by the step portion and the side wall of the valve body. When the valve core is subjected to the upward elastic force of the elastic member, the deformable sealing member covering the top wall of the valve core is deformed, and the valve core can continue to move upward. At this time, the space formed by the step portion and the side wall of the valve body will become smaller due to the movement of the valve core. Since the deformable sealing member initially fills up the space formed by the step portion and the side wall of the valve body, the deformable sealing member in this space will also be compressed, thereby forming a second sealing position.

[0030] 3. The utility model can prevent the valve core from turning over by designing the guide part and the guide groove;

[0031] The first fluid outlets are evenly arranged on the side wall of the valve body at the connection between the high-pressure chamber and the low-pressure chamber. The high-pressure fluid is preferentially directed to the first fluid outlet by designing the guide part and the guide groove. For example, three first fluid outlets are set with an angle of 120 degrees between them. In the presence of the guide part and the guide groove, the high-pressure fluid will be evenly directed to the three first fluid outlets to avoid the valve core flipping.

[0032] Correspondingly, if there are no guide parts and guide grooves, high-pressure fluid may cause the valve core to flip, but the valve core will not continue to flip after flipping to a certain angle (limited by the inner wall of the valve body). However, the flipping of the valve core will cause pressure regulation errors, and the deformed seal on one side will be repeatedly stressed and aged first. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The drawings of the present utility model are intended to illustrate the general characteristics of the methods, structures and / or materials used in specific exemplary embodiments of the present utility model, and to supplement the description in the specification. However, the drawings of the present utility model are schematic diagrams not drawn to scale, and thus may not accurately reflect the precise structure or performance characteristics of any given embodiment. The drawings of the present utility model should not be interpreted as limiting or restricting the range of values ​​or properties covered by the exemplary embodiments of the present utility model. The present utility model is further described in detail below in conjunction with the drawings and specific embodiments:

[0034] Figure 1 This is a schematic diagram of the structure of the first embodiment of the utility model Figure 1 .

[0035] Figure 2 This is a schematic diagram of the structure of the second embodiment of the utility model Figure 2 .

[0036] Description of Reference Numerals

[0037] Valve body 1

[0038] High pressure chamber 1.1

[0039] Low pressure chamber 1.2

[0040] Annular convex part 1.3

[0041] Fluid inlet 1.4

[0042] First fluid outlet 1.5

[0043] Second fluid outlet 1.6

[0044] Spool 2

[0045] Deformable seal 3

[0046] Guide part 3.1

[0047] Elastic parts 4

[0048] Elastic base 5

[0049] Seal 6. DETAILED DESCRIPTION

[0050] The following describes the implementation methods of the utility model through specific specific embodiments, and those skilled in the art can fully understand other advantages and technical effects of the utility model from the contents disclosed in this specification. The utility model can also be implemented or applied through different specific implementation methods, and the details in this specification can also be applied based on different viewpoints, and various modifications or changes can be made without deviating from the general design concept of the utility model. It should be noted that the following embodiments and features in the embodiments can be combined with each other without conflict. The following exemplary embodiments of the utility model can be implemented in a variety of different forms and should not be interpreted as being limited to the specific embodiments described here. It should be understood that these embodiments are provided to make the disclosure of the utility model thorough and complete, and to fully convey the technical solutions of these exemplary specific embodiments to those skilled in the art.

[0051] It should be understood that when an element is referred to as being "connected" or "coupled" to another element, the element may be directly connected or coupled to the other element, or there may be intervening elements. Conversely, when an element is referred to as being "directly connected" or "directly coupled" to another element, there are no intervening elements. The same reference numerals throughout the drawings represent the same elements.

[0052] First embodiment;

[0053] like Figure 1 Combination Figure 2 As shown, the utility model provides a pressure regulating valve structure, comprising:

[0054] The valve body 1 is formed with a high-pressure chamber 1.1 and a low-pressure chamber 1.2. An annular convex portion 1.3 is formed on the inner wall of the valve body at the position where the high-pressure chamber 1.1 contacts the valve core 2. A fluid inlet 1.4 is formed at the top of the high-pressure chamber. A plurality of uniform first fluid outlets 1.5 are formed on the side wall at the connection between the high-pressure chamber 1.1 and the low-pressure chamber 1.2. A second fluid outlet 1.6 is formed at the bottom of the low-pressure chamber.

[0055] It should be noted that the more first fluid outlets there are, the stronger the pressure relief capacity is, but the more first fluid outlets there are, the better. Too many first fluid outlets on the side wall of the valve body will increase the difficulty of the manufacturing process and reduce the strength of the valve body. It is preferred to set three first fluid outlets 1.5;

[0056] The valve core 2 is arranged in the valve body 1, and realizes the pressure regulation between the high-pressure chamber 1.1 and the low-pressure chamber 1.2 by whether the first fluid outlet 1.5 and / or the second fluid outlet 1.6 are opened;

[0057] A deformable sealing member 3, which covers and is fixed to the top wall of the valve core, and a portion of the deformable sealing member 3 located at the periphery of the top wall of the valve core is formed into a contact slope;

[0058] The step portion 2.1 is formed on the upper portion of the side wall of the valve core 2;

[0059] The deformable sealing member 3 covers the step portion 2.1. When the valve core 2 is not subjected to the elastic force of the elastic member, the deformable sealing member 3 covering the step portion 2.1 fills the space formed by the step portion 2.1 and the side wall of the valve body.

[0060] An elastic member 4, which is fixed in the low-pressure chamber 1.2 and exerts an upward elastic force on the valve core 2;

[0061] An elastic member base 5, which is fixed to the bottom of the low-pressure chamber 1.2 and is used to support and fix the elastic member 4;

[0062] When the valve core 2 moves to the upper locking position, the annular protrusion 1.3 compresses the contact inclined surface of the deformable seal, causing the contact inclined surface to deform and form surface contact, thereby forming a seal between the deformable seal and the valve body.

[0063] The first embodiment can be optionally improved, where the top of the annular protrusion 1.3 forms an arc surface, which compresses the contact slope of the deformable seal, causing the contact slope to deform and form surface contact, thereby forming a seal between the deformable seal and the valve body.

[0064] Second embodiment;

[0065] Continue to refer Figure 2 As shown, the second embodiment of the utility model is a further improvement on the above first embodiment, and the same parts are not repeated here, and further include:

[0066] A flow guide portion 3.1, which is formed on the top of the deformable sealing member and is used to guide the inflowing fluid to the first fluid outlet 1.5;

[0067] As an optional improvement, the flow guide portion 3.1 is a prism or pyramid formed on the top of the deformable sealing member 3, a flow guide groove is formed on the side wall of the prism or pyramid, and the end of the flow guide groove is aligned with the first fluid outlet.

[0068] This design allows the high-pressure fluid to flow to the first fluid outlet first. The first fluid outlets are evenly arranged on the side wall of the valve body at the connection between the high-pressure chamber and the low-pressure chamber, which can prevent the valve core from flipping due to uneven fluid pressure. For example, three first fluid outlets are set with an angle of 120 degrees between them. In the presence of a guide part and a guide groove, the high-pressure fluid will be evenly diverted to the three first fluid outlets to prevent the valve core from flipping.

[0069] Preferably, the depth of the guide groove gradually increases from the top to the bottom.

[0070] Third embodiment;

[0071] The third embodiment of the utility model is a further improvement on the basis of any one of the first to second embodiments, and the same parts are not repeated here, and further includes:

[0072] A groove formed on an outer side wall of the valve body at an upper portion of the high pressure chamber;

[0073] The sealing member 6 is sleeved in the groove.

[0074] The valve core 2 of the first to third embodiments may be made of metal, the deformable sealing member 3 may be made of a rubber pad, the elastic member 4 may be made of a spring, and the sealing member 6 may be made of a rubber ring.

[0075] Unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those commonly understood by those skilled in the art to which the present invention belongs. It will also be understood that, unless explicitly defined herein, terms such as those defined in general dictionaries should be interpreted as having a meaning consistent with their meaning in the context of the relevant field, and not interpreted in an ideal or overly formal sense.

[0076] The present invention is described in detail above through specific implementation methods and examples, but these do not constitute limitations of the present invention. Without departing from the principle of the present invention, those skilled in the art may make many modifications and improvements, which should also be considered as the protection scope of the present invention.

Claims

1. A pressure regulating valve structure, characterized in that: include: The valve body is formed with a high-pressure chamber and a low-pressure chamber, an annular convex portion is formed on the inner wall of the valve body at the position where the high-pressure chamber contacts the valve core, a fluid inlet is formed at the top of the high-pressure chamber, a plurality of evenly arranged first fluid outlets are formed on the side wall of the valve body at the connection between the high-pressure chamber and the low-pressure chamber, and a second fluid outlet is formed at the bottom of the low-pressure chamber; A valve core is disposed in the valve body and is used for regulating the pressure between the high-pressure chamber and the low-pressure chamber; A deformable sealing member, which covers and is fixed to the top wall of the valve core, and a portion of the deformable sealing member located at the periphery of the top wall of the valve core is formed into a contact inclined surface; A step portion is formed on the upper part of the side wall of the valve core, and the deformable sealing member covers the step portion. When the valve core is not subjected to the elastic force of the elastic member, the deformable sealing member covering the step portion fills the space formed by the step portion and the side wall of the valve body; An elastic member, which is fixed in the low-pressure chamber and exerts an upward elastic force on the valve core; An elastic member base, which is fixed to the bottom of the low-pressure chamber and is used to support and fix the elastic member; When the valve core moves to the upper locking position, the annular protrusion compresses the contact inclined surface of the deformable seal, causing the contact inclined surface to deform and form surface contact, thereby forming a seal between the deformable seal and the valve body.

2. The pressure regulating valve structure according to claim 1, characterized in that: The top of the annular convex portion forms an arc surface, and the arc surface of the annular convex portion compresses the contact inclined surface of the deformable sealing element to form a deformable surface contact.

3. The pressure regulating valve structure according to claim 1, characterized in that: Also includes: The guide portion is formed on the top of the deformable sealing component and is used for guiding the inflowing fluid to the first fluid outlet.

4. The pressure regulating valve structure according to claim 3, characterized in that: The flow guide portion is a prism body or a pyramid body formed on the top of the deformable sealing member.

5. The pressure regulating valve structure according to claim 4, characterized in that: A guide groove is formed on the side wall of the guide portion, and the end of the guide groove is aligned with the first fluid outlet.

6. The pressure regulating valve structure according to claim 5, characterized in that: The depth of the guide groove gradually increases from the top to the bottom.

7. The pressure regulating valve structure according to claim 1, characterized in that: Also includes: A groove formed on an outer side wall of the valve body at an upper portion of the high pressure chamber; A sealing member is mounted in the groove.

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