Fine adjustment pressure stabilizing valve

Abstract

The utility model discloses a fine-adjustment pressure stabilizing valve which comprises an upper valve body and a lower valve body, and further comprises an adjusting screw rod, an adjusting nut, a pressure stabilizing diaphragm and an adjusting spring which are arranged in a valve cavity, the pre-tightening force of the adjusting spring on the pressure stabilizing diaphragm is adjusted by rotating the adjusting knob so as to control the pressure value of the air outlet of the lower valve body, a rotation stopping mechanism is arranged between the adjusting knob and the upper valve body, and the rotation stopping mechanism comprises an inserting groove formed along the outer periphery of the upper end of the upper valve body and an inserting block arranged in the adjusting knob. The structure is simple, adjustment is convenient, when the outlet pressure needs to be adjusted, the adjusting knob is pulled upwards, the insertion block and the insertion groove are separated from insertion fit, and at the moment, the adjusting knob can rotate relative to the upper valve body; when the outlet pressure does not need to be adjusted, the adjusting knob is pressed downwards, the inserting block is matched with the inserting groove in an inserted mode, and at the moment, the adjusting knob cannot rotate relative to the upper valve body, so that the adjusting knob can be prevented from loosening and moving, and the pressure stabilizing function of the pressure stabilizing valve is more reliable.

Description

Technical Field

[0001] The utility model relates to the technical field of pressure-stabilizing valves, in particular to a micro-adjusting pressure-stabilizing valve. Background Art

[0002] The pressure-stabilizing valve controls the opening of the opening and closing parts in the valve body to adjust the flow of the medium, thereby reducing the pressure of the medium. At the same time, it uses the pressure behind the valve to adjust the opening of the opening and closing parts, so that the pressure behind the valve is maintained within a certain range. When the inlet pressure is constantly changing, the outlet pressure is maintained within the set range to protect the subsequent living and production equipment.

[0003] In the prior art, the pressure regulating valve is generally adjustable, and the regulating knob for controlling the regulating spring can be adjusted on site according to the actual needs of the customer. The regulating knob directly acts on the regulating spring, and under the force of the regulating spring, the pressure stabilizing diaphragm generates force to act on the valve disc to achieve the effect of stabilizing the pressure. However, the structure of the pressure regulating knob in the prior art is generally set to be relatively simple, and the regulating knob will become loose after long-term use. It is often encountered that the regulating knob is "out of position" due to looseness, especially in an environment with large vibrations. The regulating knob rotated to the preset position will move forward or backward when subjected to force. The loosening of the regulating knob will cause the pressure regulation to be unstable, resulting in the pressure stabilization value not being the set value. Obviously, this is very unfavorable for the pressure stabilization effect.

[0004] In order to solve the above technical problems, improvements have been made to the existing technologies in the market. For example, a Chinese utility model patent (publication number CN206503955U) discloses a pressure-stabilizing valve, which includes a valve body and a valve cover, a diaphragm is arranged between the valve body and the valve cover, a chamber is arranged between the diaphragm and the valve body, a damping tube for communication is arranged between the chamber and the liquid outlet, a communicating port is arranged between the liquid inlet and the liquid outlet, a valve core for communicating or closing the communicating port is arranged at the communicating port, the diaphragm is connected to the valve core, an adjusting component is arranged at the upper end of the diaphragm, the adjusting component includes a spring mounting seat, a pressure regulating spring is arranged between the spring mounting seat and the diaphragm, a mounting hole is arranged on the valve cover, an adjusting knob is arranged between the spring mounting seat and the valve cover, the knob is threadedly connected to the mounting hole and drives the spring mounting seat to move up and down, the adjusting knob includes a shell and a ball arranged in the shell, a driving spring for driving the ball to move up and down is also arranged in the shell, and a groove that conflicts with the ball is arranged on the spring mounting seat. The pressure regulating valve has stable pressure during pressure regulation, and can effectively avoid the phenomenon of unstable pressure caused by loose adjustment knob. However, its structure is relatively complex, the assembly is difficult, and the production cost is high.

[0005] Therefore, it is necessary to improve the existing technology. Utility Model Content

[0006] The purpose of the utility model is to provide a fine-tuning pressure-stabilizing valve in view of the defects and shortcomings of the prior art, which can prevent the adjusting knob from loosening and moving by setting a rotation-stop mechanism between the adjusting knob and the upper valve body, thereby making the pressure-stabilizing function of the pressure-stabilizing valve more reliable and having a simple structure.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A fine-adjusting pressure-stabilizing valve comprises an upper valve body and a lower valve body, wherein an adjusting knob is arranged at the upper end of the upper valve body, a valve cavity is formed by the upper valve body and the lower valve body, an air inlet and an air outlet are respectively arranged at the lower valve body, and an adjusting screw, an adjusting nut, a pressure-stabilizing diaphragm and an adjusting spring are arranged in the valve cavity, the adjusting nut is tightly connected with the upper valve body, the adjusting screw is threadedly connected with the adjusting nut, the adjusting spring is arranged between the pressure-stabilizing diaphragm and the adjusting nut, and the upper end of the adjusting screw passes through the upper valve body and is connected with the adjusting nut. The regulating knob is connected with a stop-rotation connection, and the pre-tightening force of the regulating spring on the pressure-stabilizing diaphragm is adjusted by rotating the regulating knob to control the pressure value of the air outlet of the lower valve body. A stop-rotation mechanism is arranged between the regulating knob and the upper valve body, and the stop-rotation mechanism includes a slot arranged along the outer periphery of the upper end of the upper valve body and an insert block arranged inside the regulating knob. When the insert block is plugged into the slot, the regulating knob cannot rotate relative to the upper valve body; when the insert block is disengaged from the slot, the regulating knob can rotate relative to the upper valve body.

[0009] Furthermore, the upper valve body is provided with a first annular groove and a second annular groove, and the inner wall of the adjusting knob is circumferentially provided with a protrusion that cooperates with the first annular groove or the second annular groove, and when the protrusion cooperates with the first annular groove, the plug block is plug-fitted with the slot; when the protrusion cooperates with the second annular groove, the plug block is disengaged from the slot.

[0010] Furthermore, an annular protrusion is provided between the first annular groove and the second annular groove, an upper edge of the annular protrusion is provided with a first slope surface, and a lower edge of the annular protrusion is provided with a second slope surface.

[0011] Furthermore, the adjusting knob is provided with a plurality of spring pieces along the circumferential direction, and the protrusion is provided at the lower end of the spring piece.

[0012] Furthermore, a quasi-square column is provided at the upper end of the adjusting screw, and a quasi-square groove which is matched and connected with the quasi-square column is provided inside the adjusting knob.

[0013] Furthermore, the adjusting screw is provided with a convex ring along the circumferential direction, the upper valve body is provided with a through hole for the adjusting screw to pass through, and the convex ring cooperates with a stopper of the through hole.

[0014] Furthermore, an annular convex edge is provided at the upper end of the adjusting nut, and the upper end of the adjusting spring is abutted against the annular convex edge.

[0015] Furthermore, the upper end surface of the adjusting knob is provided with a pressure increase mark, a pressure reduction mark and a steering mark along the circumferential direction.

[0016] After adopting the above structure, the beneficial effects of the utility model are as follows: a fine-tuning pressure-stabilizing valve described in the utility model includes an upper valve body and a lower valve body, and the upper valve body and the lower valve body are surrounded by a valve cavity, and the lower valve body is respectively provided with an air inlet and an air outlet, and also includes an adjusting screw, an adjusting nut, a pressure-stabilizing diaphragm and an adjusting spring installed in the valve cavity, the upper end of the adjusting screw passes through the upper valve body and is connected to the adjusting knob for preventing rotation, and the adjusting knob is rotated to adjust the pre-tightening force of the adjusting spring on the pressure-stabilizing diaphragm to control the pressure value of the air outlet of the lower valve body, and a anti-rotation mechanism is arranged between the adjusting knob and the upper valve body, and the anti-rotation mechanism includes a slot arranged along the outer periphery of the upper end of the upper valve body and an insert arranged inside the adjusting knob. The utility model has a simple structure and is easy to adjust. When the outlet pressure needs to be adjusted, the adjusting knob is pulled upward to disengage the plug block from the slot, and the adjusting knob can rotate relative to the upper valve body; when the outlet pressure does not need to be adjusted, the adjusting knob is pressed downward to engage the plug block with the slot, and the adjusting knob cannot rotate relative to the upper valve body, thereby preventing the adjusting knob from loosening and moving, making the pressure stabilizing function of the pressure stabilizing valve more reliable. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the specific implementation methods of the present utility model, the drawings required for use in the description of the specific implementation methods will be briefly introduced below. Obviously, the drawings in the following description are some implementation methods of the present utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0018] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0019] Figure 2 It is an exploded view of the overall structure of the utility model;

[0020] Figure 3 It is a sectional view of the overall structure of the utility model;

[0021] Figure 4 The utility model Figure 3 A schematic diagram of the structure at A;

[0022] Figure 5 This is a three-dimensional diagram of the adjustment knob of the utility model Figure 1 ;

[0023] Figure 6 This is a three-dimensional diagram of the adjustment knob of the utility model Figure 2 ;

[0024] Figure 7 It is a three-dimensional schematic diagram of the upper valve body of the utility model;

[0025] Figure 8 It is a three-dimensional schematic diagram of the adjusting screw of the utility model;

[0026] Fig. 9 It is a three-dimensional schematic diagram of the adjusting nut of the utility model.

[0027] Figures 1 to 9 The bid number is:

[0028] 1. Upper valve body; 11. First annular groove; 12. Second annular groove; 13. Annular protrusion; 131. First slope; 132. Second slope; 2. Lower valve body; 21. Air inlet; 22. Air outlet; 3. Adjustment knob; 31. Protrusion; 32. Spring piece; 33. Quasi-square groove; 34. Pressure-increasing mark; 35. Pressure-reducing mark; 36. Steering mark; 4. Valve cavity; 5. Adjustment screw; 51. Quasi-square column; 52. Raised ring; 6. Adjustment nut; 61. Annular convex edge; 7. Pressure-stabilizing diaphragm; 8. Adjustment spring; 9. Anti-rotation mechanism; 91. Slot; 92. Insert. DETAILED DESCRIPTION

[0029] In order to make the above-mentioned purposes, features and advantages of the utility model more obvious and easy to understand, the specific implementation methods of the utility model are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the utility model. However, the utility model can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the utility model, so the utility model is not limited by the specific embodiments disclosed below.

[0030] In the description of the present invention, it should be understood that if the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc. appear, the orientation or position relationship indicated by these terms is based on the orientation or position relationship shown in the accompanying drawings, which is only for the convenience of describing the present invention and simplifying the description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In addition, if the terms "first" or "second" appear, these terms are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features. In the description of the present utility model, if the term "plurality" appears, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0032] In the present invention, unless otherwise clearly defined and limited, if the terms "installed", "connected", "connected", "fixed" and the like appear, these terms should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integrated connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to the specific circumstances.

[0033] In the present utility model, unless otherwise clearly specified and limited, if there is a description that a first feature is "above" or "below" a second feature, etc., or similar descriptions appear, it may mean that the first and second features are in direct contact, or that the first and second features are in indirect contact through an intermediate medium. Moreover, the first feature being "above", "above" and "above" the second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. The first feature being "below", "below" and "below" the second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0034] It should be noted that if an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be a central element. If an element is considered to be "connected to" another element, it may be directly connected to the other element or there may be a central element at the same time. If any, the terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used in this utility model are only for illustrative purposes and do not represent the only implementation method.

[0035] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments of the present invention can be combined with each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0036] like Figures 1 to 9As shown, a fine-adjustment pressure-stabilizing valve comprises an upper valve body 1 and a lower valve body 2, wherein an adjusting knob 3 is arranged at the upper end of the upper valve body 1, a valve cavity 4 is formed around the upper valve body 1 and the lower valve body 2, and the lower valve body 2 is respectively provided with an air inlet 21 and an air outlet 22, and further comprises an adjusting screw 5, an adjusting nut 6, a pressure-stabilizing diaphragm 7 and an adjusting spring 8 installed in the valve cavity 4, wherein the adjusting nut 6 is tightly connected with the upper valve body 1, the adjusting screw 5 is threadedly connected with the adjusting nut 6, the adjusting spring 8 is arranged between the pressure-stabilizing diaphragm 7 and the adjusting nut 6, and the upper end of the adjusting screw 5 passes through the upper valve body 1 and is connected with the adjusting nut 6. The regulating knob 3 is anti-rotationally connected, and the pre-tightening force of the regulating spring 8 on the pressure-stabilizing diaphragm 7 is adjusted by rotating the regulating knob 3 to control the pressure value of the air outlet 22 of the lower valve body 2. A anti-rotation mechanism 9 is arranged between the regulating knob 3 and the upper valve body 1, and the anti-rotation mechanism 9 includes a slot 91 arranged along the outer periphery of the upper end of the upper valve body 1 and an insert block 92 arranged inside the regulating knob 3. When the insert block 92 is plugged into the slot 91, the regulating knob 3 cannot rotate relative to the upper valve body 1; when the insert block 92 is disengaged from the slot 91, the regulating knob 3 can rotate relative to the upper valve body 1. The upper valve body 1 is provided with a first annular groove 11 and a second annular groove 12. The inner wall of the adjusting knob 3 is provided with a protrusion 31 along the circumferential direction to cooperate with the first annular groove 11 or the second annular groove 12. When the protrusion 31 cooperates with the first annular groove 11, the plug block 92 is plugged into the slot 91; when the protrusion 31 cooperates with the second annular groove 12, the plug block 92 is disengaged from the slot 91. A quasi-square column 51 is provided at the upper end of the adjusting screw 5, and a quasi-square groove 33 is provided inside the adjusting knob 3 to cooperate with the quasi-square column 51.

[0037] Based on the above embodiments, the utility model aims to solve the problem of providing a fine-adjusting pressure-stabilizing valve, including an upper valve body 1 and a lower valve body 2, wherein the upper valve body 1 and the lower valve body 2 are surrounded by a valve cavity 4, and the lower valve body 2 is respectively provided with an air inlet 21 and an air outlet 22, and also includes an adjusting screw 5, an adjusting nut 6, a pressure-stabilizing diaphragm 7 and an adjusting spring 8 installed in the valve cavity 4, the upper end of the adjusting screw 5 passes through the upper valve body 1 and is connected to the adjusting knob 3 for preventing rotation, and the pre-tightening force of the adjusting spring 8 on the pressure-stabilizing diaphragm 7 is adjusted by rotating the adjusting knob 3 to control the pressure value of the air outlet 22 of the lower valve body 2, and a stopping mechanism 9 is arranged between the adjusting knob 3 and the upper valve body 1, and the stopping mechanism 9 includes a slot 91 arranged along the outer periphery of the upper end of the upper valve body 1 and an insert 92 arranged inside the adjusting knob 3. The utility model has a simple structure and is easy to adjust. When it is necessary to adjust the outlet pressure, pull the adjusting knob 3 upward so that the protrusion 31 cooperates with the second annular groove 12. At this time, the plug block 92 is disengaged from the slot 91, and the adjusting knob 3 can rotate relative to the upper valve body 1. When it is not necessary to adjust the outlet pressure, press the adjusting knob 3 downward so that the protrusion 31 cooperates with the first annular groove 11. At this time, the plug block 92 is plugged into the slot 91, and the adjusting knob 3 cannot rotate relative to the upper valve body 1, thereby preventing the adjusting knob 3 from loosening and moving out of position, making the pressure stabilizing function of the pressure-stabilizing valve more reliable. A square-like column 51 is provided at the upper end of the adjusting screw 5, and a square-like groove 33 that cooperates with the square-like column 51 is provided inside the adjusting knob 3. In this embodiment, Figure 6 , Figure 8 As shown, the adjustment screw 5 and the adjustment knob 3 are non-rotatably connected by the cooperation of the quasi-square column 51 and the quasi-square groove 33. When the adjustment knob 3 is rotated, the adjustment screw 5 can rotate synchronously with the adjustment knob 3. Here, the working principle of the adjustable pressure regulating valve is the prior art and will not be further described in detail.

[0038] As another preferred embodiment of the present invention, an annular protrusion 13 is provided between the first annular groove 11 and the second annular groove 12, the upper edge of the annular protrusion 13 is provided with a first slope 131, and the lower edge of the annular protrusion 13 is provided with a second slope 132. The adjusting knob 3 is provided with a plurality of spring pieces 32 along the circumference, and the protrusion 31 is provided at the lower end of the spring piece 32. In this embodiment, as Figure 4 , Figure 6 and Figure 7 As shown, by the arrangement of the spring sheet 32, the diameter of the side wall of the adjusting knob 3 can be elastically changed, so that the annular protrusion 13 can slide between the first annular groove 11 and the second annular groove 12. At the same time, the arrangement of the first slope 131 and the second slope 132 plays a guiding role, which is more conducive to the sliding of the annular protrusion 13 between the first annular groove 11 and the second annular groove 12.

[0039] As another preferred embodiment of the present invention, the adjusting screw 5 is provided with a convex ring 52 along the circumferential direction, the upper valve body 1 is provided with a through hole for the adjusting screw 5 to pass through, and the convex ring 52 cooperates with the through hole stopper. Figure 4 As shown, the convex ring 52 cooperates with the stopper of the through hole to limit the movement of the adjusting screw 5, thereby preventing the adjusting screw 5 from being unexpectedly separated from the upper valve body 1.

[0040] As another preferred embodiment of the present invention, the upper end of the adjusting nut 6 is provided with an annular convex edge 61, and the upper end of the adjusting spring 8 is in abutment with the annular convex edge 61. Figure 4 , Figure 8 As shown, downward pressure is applied to the regulating spring 8 through the annular convex edge 61, thereby adjusting the preload force of the regulating spring 8 on the pressure-stabilizing diaphragm 7, thereby controlling the pressure value of the air outlet 22 of the lower valve body 2.

[0041] As another preferred solution of the present invention, the upper end surface of the adjusting knob 3 is provided with a pressure increase mark 34, a pressure reduction mark 35 and a steering mark 36 along the circumferential direction. Figure 5 As shown, the boost mark 34, the decompression mark 35 and the steering mark 36 are used to guide the user's operation. When the pressure of the air outlet 22 needs to be reduced, the adjusting knob 3 is rotated in the direction indicated by the decompression mark 35; when the pressure of the air outlet 22 needs to be increased, the adjusting knob 3 is rotated in the direction indicated by the boost mark 34.

[0042] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the present utility model.

Claims

1. A fine-adjusting pressure-stabilizing valve, comprising an upper valve body (1) and a lower valve body (2), wherein an adjusting knob (3) is disposed at the upper end of the upper valve body (1), wherein the upper valve body (1) and the lower valve body (2) are surrounded by a valve cavity (4), wherein the lower valve body (2) is respectively provided with an air inlet (21) and an air outlet (22), and further comprising an adjusting screw (5), an adjusting nut (6), a pressure-stabilizing diaphragm (7) and an adjusting spring (8) which are arranged in the valve cavity (4), wherein the adjusting nut (6) is connected to the upper valve body (1) and the lower valve body (2) to form a valve cavity (4), wherein the lower valve body (2) is provided with an air inlet (21) and an air outlet (22), and wherein the adjusting screw (5), an adjusting nut (6), a pressure-stabilizing diaphragm (7) and an adjusting spring (8) are arranged in the valve cavity (4), wherein the adjusting nut (6) is connected to the upper valve body (1) and the lower valve body (2) to form a valve cavity (4), wherein the adjusting screw (5), an adjusting nut (6) and a pressure-stabilizing diaphragm (7) are connected to the upper valve body (1) and the lower valve body (2) to form a ... nut (6) is connected to the upper valve body (1) and the lower valve body (2) to form a valve cavity (4), wherein the adjusting nut ( The valve body (1) is tightly connected, the adjusting screw (5) is threadedly connected to the adjusting nut (6), the adjusting spring (8) is arranged between the pressure-stabilizing diaphragm (7) and the adjusting nut (6), the upper end of the adjusting screw (5) passes through the upper valve body (1) and is non-rotatably connected to the adjusting knob (3), and the pre-tightening force of the adjusting spring (8) on the pressure-stabilizing diaphragm (7) is adjusted by rotating the adjusting knob (3) to control the pressure value of the air outlet (22) of the lower valve body (2), characterized in that: A rotation-stopping mechanism (9) is disposed between the adjusting knob (3) and the upper valve body (1), the rotation-stopping mechanism (9) comprising a slot (91) arranged along the outer periphery of the upper end of the upper valve body (1) and an insert block (92) arranged inside the adjusting knob (3); when the insert block (92) is plugged into the slot (91), the adjusting knob (3) cannot rotate relative to the upper valve body (1); when the insert block (92) is disengaged from the slot (91), the adjusting knob (3) can rotate relative to the upper valve body (1).

2. A micro-adjustable pressure-stabilizing valve according to claim 1, characterized in that: The upper valve body (1) is provided with a first annular groove (11) and a second annular groove (12); the inner wall of the adjusting knob (3) is circumferentially provided with a protrusion (31) that cooperates with the first annular groove (11) or the second annular groove (12); when the protrusion (31) cooperates with the first annular groove (11), the plug block (92) is plugged into and fits with the slot (91); when the protrusion (31) cooperates with the second annular groove (12), the plug block (92) is disengaged from the slot (91).

3. A micro-adjustable pressure-stabilizing valve according to claim 2, characterized in that: An annular protrusion (13) is provided between the first annular groove (11) and the second annular groove (12); the upper edge of the annular protrusion (13) is provided with a first slope surface (131); and the lower edge of the annular protrusion (13) is provided with a second slope surface (132).

4. A micro-adjustable pressure-stabilizing valve according to claim 2, characterized in that: The adjusting knob (3) is provided with a plurality of spring sheets (32) along the circumferential direction, and the protrusion (31) is provided at the lower end of the spring sheet (32).

5. The micro-adjustable pressure-stabilizing valve according to claim 1, characterized in that: A quasi-square column (51) is disposed at the upper end of the adjusting screw rod (5), and a quasi-square groove (33) is disposed inside the adjusting knob (3) and is cooperatively connected to the quasi-square column (51).

6. A micro-adjustable pressure-stabilizing valve according to claim 1, characterized in that: The adjusting screw (5) is provided with a convex ring (52) along the circumferential direction, the upper valve body (1) is provided with a through hole for the adjusting screw (5) to pass through, and the convex ring (52) cooperates with a through hole stopper.

7. The micro-adjustable pressure-stabilizing valve according to claim 1, characterized in that: The upper end of the adjusting nut (6) is provided with an annular convex edge (61), and the upper end of the adjusting spring (8) is in abutment with the annular convex edge (61).

8. The micro-adjustable pressure-stabilizing valve according to claim 1, characterized in that: The upper end surface of the regulating knob (3) is provided with a pressure increase mark (34), a pressure reduction mark (35) and a steering mark (36) along the circumferential direction.

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