An intelligent pressure-stabilizing differential regulating valve

Abstract

The present invention belongs to the field of valve technology, and specifically relates to an intelligent pressure-stabilizing differential regulating valve, including a valve body, a spring is arranged at the bottom of the valve body, a diaphragm is fixedly connected to the top of the valve body; a valve stem mechanism, used to open and close the valve body; a pressure sensing mechanism, used to adsorb top rings of different diameters; an elastic mechanism, the elastic mechanism is arranged at the bottom of the valve body, and is used to replace the spring and adjust the spring stroke. The present invention can facilitate the replacement of the valve plug through the detachable valve plug assembly in the valve stem mechanism, can be pressed against the valve body by the sealing ring when the valve plug is closed, thereby improving the sealing of the regulating valve, and can adsorb top rings of different diameters by the electromagnet in the pressure sensing mechanism, adjust the position of the diaphragm that is worn by the edge of the top ring, and improve the service life of the diaphragm, and can facilitate the replacement of the spring and adjust the travel range of the spring through the elastic mechanism, thereby improving the convenience of the regulating valve.

Description

Technical Field

[0001] The invention belongs to the technical field of valves, and in particular relates to an intelligent pressure-stabilizing differential regulating valve. Background Art

[0002] The intelligent pressure-stabilizing differential regulating valve is a device that uses the control valve opening to maintain a specific pressure difference. It is mainly used to maintain the stability of the system pressure and automatically adjusts to maintain a constant pressure difference when the flow or pressure changes. The common intelligent pressure-stabilizing differential regulating valve is mainly composed of a valve body, a valve cover, a valve core, a diaphragm and a spring. When the water supply pressure P1 increases, the diaphragm drives the valve core to move down and close the valve port, so that the pressure P2 after the valve increases to maintain the constant pressure difference P1-P2; conversely, when P1 decreases, the valve port will automatically open to reduce P2, thereby keeping the pressure difference P1-P2 constant.

[0003] The valve plug of the existing intelligent pressure-stabilizing differential control valve is generally fixedly connected to the valve stem. When the valve plug needs to be replaced due to cavitation or wear, the valve stem and valve plug need to be replaced as a whole, which is not convenient enough. When the valve plug is in the closed state, the valve plug is usually in line contact with the valve body, and the sealing is insufficient. The spring is generally installed in a sealed manner, which makes it difficult to replace the spring and adjust the travel range of the spring. It is not convenient enough, and the size of the top plate of the diaphragm is usually fixed. After the diaphragm moves, it is continuously worn at the same part of the edge of the top plate, resulting in a insufficient service life and reliability of the diaphragm. Summary of the invention

[0004] The object of the present invention is to provide an intelligent pressure-stabilizing differential regulating valve, which can facilitate the replacement of valve plugs through a detachable valve plug assembly in a valve stem mechanism, can adhere to the valve body through a sealing ring when the valve plug is in a closed state, thereby improving the sealing of the regulating valve, can absorb top rings of different diameters through an electromagnet in a pressure-sensing mechanism, adjust the position of the diaphragm that is worn by the edge of the top ring, thereby increasing the service life of the diaphragm, and can facilitate the replacement of springs and adjustment of the travel range of the springs through an elastic mechanism, thereby improving the convenience of the regulating valve.

[0005] The technical solution adopted by the present invention is as follows:

[0006] An intelligent pressure-stabilizing differential regulating valve, comprising:

[0007] A valve body, wherein a spring is arranged at the bottom of the valve body and a diaphragm is fixedly connected to the top of the valve body;

[0008] A valve stem mechanism, the valve stem mechanism is arranged inside the valve body along the vertical direction, the valve stem mechanism is located between the spring and the diaphragm, and is used to open and close the valve body, the valve stem mechanism includes a bottom plate slidably connected to the bottom of the valve body, two valve plug assemblies are detachably connected above the bottom plate, a plurality of top rings with gradually increasing diameters are arranged above the valve plug assembly from the inside to the outside, the plurality of top rings are slidably connected to each other along the vertical direction, and the top ring is located at the lower side of the diaphragm;

[0009] A pressure sensing mechanism, which is arranged on the top of the valve body and is used to absorb top rings of different diameters. The pressure sensing mechanism includes an absorption plate slidably mounted on the top of the valve body, the absorption plate is located on the upper side of the diaphragm, and a side of the absorption plate close to the top ring is provided with a plurality of electromagnets with gradually increasing diameters from the inside to the outside;

[0010] An elastic mechanism, which is arranged at the bottom of the valve body and is used to replace the spring and adjust the spring stroke. The elastic mechanism comprises an outer cylinder detachably mounted at the bottom of the valve body, an inner cylinder is slidably mounted inside the outer cylinder, and the bottom plate is located between the top of the inner cylinder and the bottom of the valve body;

[0011] The inner cylinder slides along the outer cylinder to adjust the stroke of the spring, and different electromagnets are energized so that several electromagnets adsorb corresponding top rings to adjust the position of the diaphragm that is worn by the edge of the top ring.

[0012] As a preferred solution of the intelligent pressure-stabilizing differential regulating valve described in the present invention, the valve stem mechanism also includes a first valve stem member arranged between the base plate and the valve plug assembly, the lower end of the first valve stem member is fixedly connected to the base plate, the upper end of the first valve stem member is detachably connected to the valve plug assembly, a second valve stem member is detachably connected between the two valve plug assemblies, a third valve stem member is arranged between the valve plug assembly and the top ring, the lower end of the third valve stem member is detachably connected to the valve plug assembly, and the upper end of the third valve stem member is slidably connected to the top ring.

[0013] As a preferred solution of the intelligent pressure-stabilizing differential regulating valve described in the present invention, the valve plug assembly includes a valve plug member arranged inside the valve body, the top and bottom of the valve plug member are fixedly connected with protrusions, the first valve stem member, the second valve stem member and the third valve stem member are all provided with grooves at one end close to the valve plug assembly, the grooves are slidably matched with the protrusions in a vertical direction, the outer side of the protrusion is fixedly connected with a limiting column, the outer side of the groove is provided with an L-shaped limiting groove, and the L-shaped limiting groove is slidably matched with the limiting column.

[0014] As a preferred solution of the intelligent pressure-stabilizing differential regulating valve described in the present invention, the valve plug assembly also includes a sealing ring fixedly connected to the outside of the valve plug, and the bottom of the sealing ring fits with the valve body.

[0015] As a preferred solution of the intelligent pressure-stabilizing differential regulating valve described in the present invention, wherein: a first slide groove is opened on the inner side of the top ring, a second slide groove is opened on the top of the first slide groove, the inner diameter of the second slide groove is smaller than the inner diameter of the first slide groove, a first slide bar is fixedly connected to the outer side of the top ring, a second slide bar is fixedly connected to the bottom of the first slide bar, the outer diameter of the second slide bar is larger than the outer diameter of the first slide bar, the first slide bar and the second slide groove are slidably matched in the vertical direction, and the second slide bar and the first slide groove are slidably matched in the vertical direction.

[0016] As a preferred solution of the intelligent pressure-stabilizing differential regulating valve described in the present invention, the number of the electromagnets is equal to the number of top rings, and there is a one-to-one correspondence between a plurality of the electromagnets and a plurality of top rings.

[0017] As a preferred solution of the intelligent pressure-stabilizing differential regulating valve described in the present invention, the elastic mechanism also includes a sealing ring arranged between the top of the outer cylinder and the bottom of the valve body, the top of the sealing ring fits with the bottom of the valve body, and the bottom of the sealing ring fits with the top of the outer cylinder.

[0018] As a preferred solution of the intelligent pressure-stabilizing differential regulating valve described in the present invention, wherein: a plurality of first protrusions are arranged at circumferential intervals on the top of the outer cylinder, a rotating groove is opened at the bottom of the valve body, the rotating groove is rotatably matched with the first protrusion, and a plurality of second protrusions are arranged at circumferential intervals on the bottom of the rotating groove, the second protrusions are rotatably matched with the outer side of the outer cylinder.

[0019] As a preferred solution of the intelligent pressure-stabilizing differential regulating valve described in the present invention, wherein: a plurality of first limit holes are opened inside the outer cylinder along the vertical direction, a second limit hole is opened inside the inner cylinder, and the second limit hole is slidably connected to the inside of the first limit hole by a limit pin.

[0020] As a preferred solution of the intelligent pressure-stabilizing differential regulating valve described in the present invention, a plurality of scale lines are arranged on the outer wall of the outer cylinder, the number of the scale lines is equal to the number of the first limit holes, and there is a one-to-one correspondence between the plurality of scale lines and the plurality of first limit holes.

[0021] The technical effects achieved by the present invention are:

[0022] The present invention adopts the design of the valve stem mechanism, and the valve stem mechanism can facilitate the replacement of the valve plug through a detachable valve plug assembly. Compared with the situation that the valve stem and the valve plug need to be replaced as a whole in the traditional method, the convenience of disassembling and assembling the valve plug is improved, and the sealing ring can be closely attached to the valve body when the valve plug is closed. Compared with the situation that the valve plug is in line contact with the valve body when the valve plug is closed in the traditional method, the line contact of the valve plug is replaced by the surface contact of the sealing ring, thereby improving the sealing performance of the regulating valve;

[0023] The present invention adopts the design of a pressure-sensing mechanism, which can absorb top rings of different diameters through an electromagnet, thereby adjusting the position of the diaphragm that is worn by the edge of the top ring, avoiding the situation in which the service life of the diaphragm is reduced due to continuous wear of the same position of the edge of the top ring after the diaphragm moves, and improving the reliability of the regulating valve;

[0024] The present invention adopts the design of an elastic mechanism, which can facilitate the replacement of springs and adjustment of the travel range of springs. The outer cylinder and the valve body can be quickly disassembled and assembled by rotating and clamping, thereby facilitating the replacement of springs. After the inner cylinder slides up and down along the outer cylinder, the distance between the top of the inner cylinder and the bottom of the valve body is adjusted to adjust the travel range of the bottom plate moving up and down, thereby adjusting the travel range of the spring, thereby improving convenience. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0026] Figure 2 The present invention Figure 1 The enlarged schematic diagram of point A in the middle;

[0027] Figure 3 It is a cross-sectional schematic diagram of the whole of the present invention;

[0028] Figure 4 The present invention Figure 3 The enlarged schematic diagram of point B in the middle;

[0029] Figure 5 The present invention Figure 3 The enlarged schematic diagram of the center C;

[0030] Figure 6 It is a structural schematic diagram of the valve stem mechanism in the present invention;

[0031] Figure 7 The present invention Figure 6 The enlarged schematic diagram of point D in the middle;

[0032] Figure 8 is an exploded schematic diagram of the valve stem mechanism in the present invention;

[0033] Fig. 9 The present invention Figure 8 The enlarged schematic diagram of point E in the middle;

[0034] Fig.10 The present invention Figure 8 The enlarged schematic diagram of F in the middle;

[0035] Fig.11 It is a structural schematic diagram of the pressure sensing mechanism in the present invention;

[0036] Fig.12 is an exploded schematic diagram of the elastic mechanism of the present invention;

[0037] Fig.13 It is a schematic structural diagram of the rotating groove and the second protrusion in the present invention.

[0038] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0039] 10. valve body; 101. rotation groove; 102. second protrusion; 11. spring; 12. diaphragm;

[0040] 20. Valve stem mechanism; 21. Bottom plate; 22. Valve plug assembly; 221. Valve plug member; 222. Bump; 223. Limiting column; 224. Sealing ring; 23. Top ring; 231. First slide groove; 232. Second slide groove; 233. First slide bar; 234. Second slide bar; 24. First valve stem member; 25. Second valve stem member; 26. Third valve stem member; 272. Groove; 273. L-shaped limiting groove;

[0041] 30. pressure sensing mechanism; 31. adsorption plate; 32. electromagnet;

[0042] 40. Elastic mechanism; 41. Outer cylinder; 411. First protrusion; 412. First limiting hole; 42. Inner cylinder; 421. Second limiting hole; 43. Sealing ring; 44. Limiting pin; 45. Scale line. DETAILED DESCRIPTION

[0043] In order to make the purpose and advantages of the present invention more clearly understood, the present invention is specifically described below in conjunction with embodiments. It should be understood that the following text is only used to describe one or several specific embodiments of the present invention, and does not strictly limit the scope of protection of the specific claims of the present invention. Example

[0044] like Figure 1 , Figure 3 , Figure 6 , Fig.11 and Fig.12As shown in the figure, it is the first embodiment of the present invention, which provides an intelligent pressure-stabilizing differential regulating valve, including a valve body 10, a spring 11 is arranged at the bottom of the valve body 10, and a diaphragm 12 is fixedly connected to the top of the valve body 10; a valve stem mechanism 20, the valve stem mechanism 20 is arranged inside the valve body 10 along the vertical direction, the valve stem mechanism 20 is located between the spring 11 and the diaphragm 12, and is used to open and close the valve body 10, the valve stem mechanism 20 includes a bottom plate 21 slidably connected to the bottom of the valve body 10, and two valve plug assemblies 22 are detachably connected to the top of the bottom plate 21 in sequence, and a plurality of top rings 23 with gradually increasing diameters are arranged in sequence from the inside to the outside of the valve plug assembly 22, and the plurality of top rings 23 are slidably connected to each other along the vertical direction, and the top rings 23 are located at the diaphragm The lower side of the diaphragm 12; a pressure-sensing mechanism 30, which is arranged at the top of the valve body 10 and is used to adsorb top rings 23 of different diameters. The pressure-sensing mechanism 30 includes an adsorption plate 31 slidably mounted on the top of the valve body 10, and the adsorption plate 31 is located on the upper side of the diaphragm 12. A side of the adsorption plate 31 close to the top ring 23 is provided with a plurality of electromagnets 32 with gradually increasing diameters from the inside to the outside; an elastic mechanism 40, which is arranged at the bottom of the valve body 10 and is used to replace the spring 11 and adjust the stroke of the spring 11. The elastic mechanism 40 includes an outer cylinder 41 detachably mounted on the bottom of the valve body 10, and an inner cylinder 42 is slidably mounted inside the outer cylinder 41. The bottom plate 21 is located between the top of the inner cylinder 42 and the bottom of the valve body 10.

[0045] It should be noted that the diaphragm 12 is made of elastic rubber, and the top ring 23 and the electromagnet 32 ​​are both annular.

[0046] When the present invention is in use, when the valve plug assembly 22 needs to be replaced, the valve plug assembly 22 is removed from the valve stem mechanism 20. Since the valve plug assembly 22 is detachably connected, the convenience of disassembling and assembling the valve plug assembly 22 is improved. When the electromagnet 32 ​​is energized and adsorbs the top ring 23, by energizing different electromagnets 32, several electromagnets 32 adsorb corresponding top rings 23 of different sizes, so that the edges of the top rings 23 of different sizes fit with the bottom of the diaphragm 12, thereby adjusting the wear of the edge of the top ring 23 when the diaphragm 12 moves. The position of the part can avoid the situation that the diaphragm 12 is constantly worn at the same part of the edge of the top ring 23 after it moves, resulting in a reduction in the service life, thereby improving the reliability of the regulating valve. When the spring 11 needs to be replaced, the outer cylinder 41 is rotated along the bottom of the valve body 10 to disengage the elastic mechanism 40 from the valve body 10, thereby taking out the spring 11, which is convenient for rapid disassembly and assembly of the spring 11, and when the inner cylinder 42 slides up and down along the outer cylinder 41, the stroke range of the bottom plate 21 moving up and down is adjusted, thereby adjusting the stroke range of the spring 11, thereby improving convenience. Example

[0047] Reference Figures 1 to 13, which is the second embodiment of the present invention, and this embodiment is based on the previous embodiment.

[0048] like Figure 6 and Figure 8 As shown, the valve stem mechanism 20 also includes a first valve stem member 24 arranged between the base plate 21 and the valve plug assembly 22, the lower end of the first valve stem member 24 is fixedly connected to the base plate 21, the upper end of the first valve stem member 24 is detachably connected to the valve plug assembly 22, a second valve stem member 25 is detachably connected between the two valve plug assemblies 22, a third valve stem member 26 is arranged between the valve plug assembly 22 and the top ring 23, the lower end of the third valve stem member 26 is detachably connected to the valve plug assembly 22, and the upper end of the third valve stem member 26 is slidably connected to the top ring 23.

[0049] According to the above structure, the detachable connection between the valve plug assembly 22, the first valve stem 24, the second valve stem 25 and the third valve stem 26 facilitates the disassembly and assembly of the valve plug assembly 22, thereby improving the convenience of disassembly and assembly of the valve plug assembly 22.

[0050] like Figure 6 , Figure 8 and Fig.10 As shown, the valve plug assembly 22 includes a valve plug member 221 arranged inside the valve body 10, and the top and bottom of the valve plug member 221 are fixedly connected with a protrusion 222, and the first valve stem member 24, the second valve stem member 25 and the third valve stem member 26 are all provided with a groove 272 at one end close to the valve plug assembly 22, and the groove 272 and the protrusion 222 are slidably matched in the vertical direction. The outer side of the protrusion 222 is fixedly connected with a limiting column 223, and the outer side of the groove 272 is provided with an L-shaped limiting groove 273, and the L-shaped limiting groove 273 is slidably matched with the limiting column 223.

[0051] According to the above structure, when the valve plug assembly 22 needs to be removed, the valve plug assembly 22 is rotated so that the limiting column 223 slides along the L-shaped limiting groove 273, and the valve plug assembly 22 is moved along the axis at the same time so that the limiting column 223 is disengaged from the L-shaped limiting groove 273, thereby removing the valve plug assembly 22, wherein the protrusion 222 cooperates with the groove 272, so that the process of the valve plug assembly 22 moving along the axis is more stable, and when the limiting column 223 is inserted into the end of the L-shaped limiting groove 273, the L-shaped limiting groove 273 limits the limiting column 223 in the vertical direction, thereby facilitating fixing the position of the valve plug assembly 22 in the valve stem mechanism 20.

[0052] like Figure 3 and Figure 4 As shown, the valve plug assembly 22 further includes a sealing ring 224 fixedly connected to the outside of the valve plug member 221 , and the bottom of the sealing ring 224 fits closely with the valve body 10 .

[0053] It should be noted that the cross section of the valve plug 221 is an isosceles trapezoid, and the cross section of the sealing ring 224 is a right triangle, and the hypotenuse of the isosceles trapezoid coincides with the hypotenuse of the right triangle.

[0054] According to the above structure, when the valve plug assembly 22 is closed, the side surface of the valve plug member 221 abuts against the opening edge of the valve body 10, and the two are in line contact at this time. At the same time, the bottom surface of the sealing ring 224 fits against the edge of the valve body 10, and the two are in surface contact at this time. By adding the sealing ring 224, the valve plug assembly 22 and the valve body 10 are in surface contact when the valve plug assembly 22 is closed. Compared with the traditional method where there is only line contact, the sealing performance is improved.

[0055] like Figures 6 to 9 As shown, a first slide groove 231 is opened on the inner side of the top ring 23, a second slide groove 232 is opened on the top of the first slide groove 231, the inner diameter of the second slide groove 232 is smaller than the inner diameter of the first slide groove 231, a first slide bar 233 is fixedly connected to the outer side of the top ring 23, a second slide bar 234 is fixedly connected to the bottom of the first slide bar 233, the outer diameter of the second slide bar 234 is larger than the outer diameter of the first slide bar 233, the first slide bar 233 and the second slide groove 232 are slidably matched in the vertical direction, and the second slide bar 234 and the first slide groove 231 are slidably matched in the vertical direction.

[0056] According to the above structure, when relative sliding occurs between the outer top ring 23 and the inner top ring 23, the first slide bar 233 slides along the second slide groove 232, and the second slide bar 234 slides along the first slide groove 231, so that relative sliding occurs between adjacent top rings 23. In the process of the electromagnet 32 ​​adsorbing the top ring 23, it is convenient to make the corresponding top ring 23 slide toward the side close to the electromagnet 32, so that the electromagnet 32 ​​and the top ring 23 clamp the diaphragm 12. Among them, during the sliding of the first slide bar 233 along the second slide groove 232, the second slide groove 232 prevents the second slide bar 234 from continuing to slide along the first slide groove 231, thereby preventing the second slide bar 234 from separating from the first slide groove 231, and preventing the top ring 23 from separating from the adjacent top ring 23 under the action of its own gravity.

[0057] like Figure 6 , Figure 8 and Fig.11 As shown, the number of the electromagnets 32 is equal to the number of the top rings 23 , and there is a one-to-one correspondence between a plurality of electromagnets 32 and a plurality of top rings 23 .

[0058] According to the above structure, since the sizes of several top rings 23 are different, by energizing the electromagnets 32 corresponding to the top rings 23 of different sizes, the electromagnets 32 adsorb the top rings 23 under the action of magnetic force, so that the electromagnets 32 and the top rings 23 clamp the diaphragm 12, and the position of the contact and wear between the diaphragm 12 and the edge of the top ring 23 is adjusted.

[0059] like Figure 3 and Figure 5 As shown, the elastic mechanism 40 also includes a sealing ring 43 arranged between the top of the outer cylinder 41 and the bottom of the valve body 10 , the top of the sealing ring 43 fits closely with the bottom of the valve body 10 , and the bottom of the sealing ring 43 fits closely with the top of the outer cylinder 41 .

[0060] According to the above structure, the sealing ring 43 is located between the outer cylinder 41 and the valve body 10. After the outer cylinder 41 and the valve body 10 are installed, the sealing ring 43 is clamped so that the sealing ring 43 plays a sealing role and improves the sealing performance of the regulating valve.

[0061] like Figure 5 , Fig.12 and Fig.13 As shown, a plurality of first protrusions 411 are circumferentially spaced apart at the top of the outer cylinder 41, a rotation groove 101 is provided at the bottom of the valve body 10, the rotation groove 101 is rotationally matched with the first protrusion 411, a plurality of second protrusions 102 are circumferentially spaced apart at the bottom of the rotation groove 101, the second protrusion 102 is rotationally matched with the outer side of the outer cylinder 41.

[0062] According to the above structure, when the outer cylinder 41 needs to be installed on the valve body 10, the first protrusion 411 and the second protrusion 102 are staggered, and the first protrusion 411 passes through the gap between the adjacent second protrusions 102, so that the first protrusion 411 is placed in the rotation groove 101, and the outer cylinder 41 is rotated so that the first protrusion 411 rotates to overlap with the second protrusion 102. At this time, the second protrusion 102 prevents the first protrusion 411 from moving downward and leaving the second protrusion 102, so that The outer cylinder 41 and the valve body 10 are kept relatively fixed, so that the outer cylinder 41 is installed on the valve body 10. When the outer cylinder 41 needs to be removed from the valve body 10, the outer cylinder 41 is rotated so that the first protrusion 411 rotates along the rotation groove 101 and is staggered with the second protrusion 102. At this time, the outer cylinder 41 is moved downward to separate the outer cylinder 41 from the valve body 10, so that the outer cylinder 41 is removed from the valve body 10, so as to improve the convenience of disassembly and assembly of the outer cylinder 41, and then facilitate the replacement of the spring 11.

[0063] like Figure 2 , Figure 5 and Fig.12 As shown, a plurality of first limiting holes 412 are opened in the vertical direction inside the outer cylinder 41 , a second limiting hole 421 is opened in the inner cylinder 42 , and the second limiting hole 421 is slidably connected to the inside of the first limiting hole 412 by a limiting pin 44 .

[0064] According to the above structure, when it is necessary to adjust the stroke of the spring 11, the limit pin 44 is pulled out from the inside of the second limit hole 421 and the first limit hole 412, so that the limit between the inner cylinder 42 and the outer cylinder 41 is released, and the inner cylinder 42 is slid up and down along the outer cylinder 41 to adjust the distance between the top of the inner cylinder 42 and the bottom of the valve body 10, thereby adjusting the up and down stroke of the bottom plate 21 between the top of the inner cylinder 42 and the bottom of the valve body 10, and then adjusting the stroke range of the spring 11.

[0065] like Figure 2 , Figure 5 and Fig.12 As shown, a plurality of scale lines 45 are arranged on the outer wall of the outer cylinder 41 , the number of the scale lines 45 is equal to the number of the first limiting holes 412 , and there is a one-to-one correspondence between the plurality of scale lines 45 and the plurality of first limiting holes 412 .

[0066] According to the above structure, the scale line 45 is set to correspond to the first limit hole 412, which is convenient for the user to observe the adjustment changes when adjusting the stroke of the spring 11, thereby improving the convenience of adjusting the stroke of the spring 11.

[0067] The working principle of the present invention is as follows: when the valve plug 221 in the regulating valve needs to be replaced, since the valve plug assembly 22 is detachably connected, the valve plug assembly 22 can be removed from the valve stem mechanism 20, so that the convenience of disassembly and assembly of the valve plug assembly 22 is improved. When the position of the diaphragm 12 that is worn by the edge of the top ring 23 needs to be adjusted, the diaphragm 12 is clamped when the top rings 23 of different sizes are adsorbed on the corresponding electromagnets 32 by energizing different electromagnets 32. At this time, the edge of the top ring 23 fits with the bottom of the diaphragm 12. Due to the size of the adsorbed top ring 23, the diaphragm 12 is clamped. The sizes are different, so as to adjust the position of the part of the diaphragm 12 that is worn by the edge of the top ring 23 when the diaphragm 12 moves, thereby increasing the service life of the diaphragm 12. When the spring 11 needs to be replaced, the outer cylinder 41 is rotated along the bottom of the valve body 10, which is convenient for disassembly and assembly of the elastic mechanism 40 and the valve body 10, thereby facilitating the quick disassembly and assembly of the spring 11 in the inner cylinder 42. After the inner cylinder 42 slides up and down along the outer cylinder 41, the stroke range of the spring 11 is adjusted by adjusting the stroke of the bottom plate 21 moving up and down between the top of the inner cylinder 42 and the bottom of the valve body 10, thereby improving convenience.

[0068] The above is only a preferred embodiment of the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made without departing from the principles of the present invention, and these improvements and modifications should also be considered as the protection scope of the present invention. The structures, devices and operating methods not specifically described and explained in the present invention shall be implemented according to the conventional means in the art unless otherwise specified and limited.

Claims

1. An intelligent pressure-stabilizing differential regulating valve, characterized in that: include: A valve body (10), wherein a spring (11) is disposed at the bottom of the valve body (10), and a diaphragm (12) is fixedly connected to the top of the valve body (10); A valve stem mechanism (20), wherein the valve stem mechanism (20) is arranged inside the valve body (10) along the vertical direction, and the valve stem mechanism (20) is located between the spring (11) and the diaphragm (12) and is used to open and close the valve body (10). The valve stem mechanism (20) comprises a bottom plate (21) slidably connected to the bottom of the valve body (10), and two valve plug assemblies (22) are detachably connected in sequence above the bottom plate (21), and a plurality of top rings (23) with gradually increasing diameters are arranged in sequence from the inside to the outside above the valve plug assembly (22), and the plurality of top rings (23) are slidably connected to each other in the vertical direction, and the top ring (23) is located on the lower side of the diaphragm (12); A pressure sensing mechanism (30), the pressure sensing mechanism (30) being arranged on the top of the valve body (10) and being used for adsorbing top rings (23) of different diameters, the pressure sensing mechanism (30) comprising an adsorption plate (31) slidably mounted on the top of the valve body (10), the adsorption plate (31) being located on the upper side of the diaphragm (12), and a plurality of electromagnets (32) of gradually increasing diameters being arranged in sequence from the inside to the outside on one side of the adsorption plate (31) close to the top ring (23); an elastic mechanism (40), the elastic mechanism (40) being arranged at the bottom of the valve body (10) and being used for replacing the spring (11) and adjusting the stroke of the spring (11), the elastic mechanism (40) comprising an outer cylinder (41) detachably mounted at the bottom of the valve body (10), an inner cylinder (42) being slidably mounted inside the outer cylinder (41), and the bottom plate (21) being located between the top of the inner cylinder (42) and the bottom of the valve body (10); The inner cylinder (42) slides along the outer cylinder (41) to adjust the stroke of the spring (11), and energizes different electromagnets (32) so that a plurality of the electromagnets (32) adsorb a corresponding plurality of top rings (23) to adjust the position of the diaphragm (12) that is worn by the edge of the top ring (23); A first slide groove (231) is provided on the inner side of the top ring (23), a second slide groove (232) is provided on the top of the first slide groove (231), an inner diameter of the second slide groove (232) is smaller than an inner diameter of the first slide groove (231), a first slide bar (233) is fixedly connected to the outer side of the top ring (23), a second slide bar (234) is fixedly connected to the bottom of the first slide bar (233), an outer diameter of the second slide bar (234) is larger than an outer diameter of the first slide bar (233), the first slide bar (233) and the second slide groove (232) are slidably matched in a vertical direction, and the second slide bar (234) and the first slide groove (231) are slidably matched in a vertical direction.

2. The intelligent pressure-stabilizing differential regulating valve according to claim 1 is characterized in that: The valve stem mechanism (20) further comprises a first valve stem member (24) arranged between the base plate (21) and the valve plug assembly (22), wherein the lower end of the first valve stem member (24) is fixedly connected to the base plate (21), and the upper end of the first valve stem member (24) is detachably connected to the valve plug assembly (22), a second valve stem member (25) is detachably connected between the two valve plug assemblies (22), a third valve stem member (26) is arranged between the valve plug assembly (22) and the top ring (23), the lower end of the third valve stem member (26) is detachably connected to the valve plug assembly (22), and the upper end of the third valve stem member (26) is slidably connected to the top ring (23).

3. The intelligent pressure-stabilizing differential regulating valve according to claim 2 is characterized in that: The valve plug assembly (22) comprises a valve plug member (221) arranged inside the valve body (10), the top and bottom of the valve plug member (221) are fixedly connected with a protrusion (222), the first valve stem member (24), the second valve stem member (25) and the third valve stem member (26) are each provided with a groove (272) at one end close to the valve plug assembly (22), the groove (272) and the protrusion (222) are slidably engaged in the vertical direction, the outer side of the protrusion (222) is fixedly connected with a limiting column (223), the outer side of the groove (272) is provided with an L-shaped limiting groove (273), and the L-shaped limiting groove (273) is slidably engaged with the limiting column (223).

4. The intelligent pressure-stabilizing differential regulating valve according to claim 3 is characterized in that: The valve plug assembly (22) further comprises a sealing ring (224) fixedly connected to the outside of the valve plug member (221), the bottom of the sealing ring (224) being in close fit with the valve body (10).

5. The intelligent pressure-stabilizing differential regulating valve according to claim 1 is characterized in that: The number of the electromagnets (32) is equal to the number of the top rings (23), and there is a one-to-one correspondence between a plurality of the electromagnets (32) and a plurality of the top rings (23).

6. The intelligent pressure-stabilizing differential regulating valve according to claim 1 is characterized in that: The elastic mechanism (40) further comprises a sealing ring (43) arranged between the top of the outer cylinder (41) and the bottom of the valve body (10), wherein the top of the sealing ring (43) fits closely with the bottom of the valve body (10), and the bottom of the sealing ring (43) fits closely with the top of the outer cylinder (41).

7. The intelligent pressure-stabilizing differential regulating valve according to claim 6 is characterized in that: A plurality of first protrusions (411) are arranged at intervals in the circumferential direction on the top of the outer cylinder (41), a rotation groove (101) is provided at the bottom of the valve body (10), the rotation groove (101) and the first protrusions (411) are rotationally matched, and a plurality of second protrusions (102) are arranged at intervals in the circumferential direction on the bottom of the rotation groove (101), the second protrusions (102) and the outer side of the outer cylinder (41) are rotationally matched.

8. The intelligent pressure-stabilizing differential regulating valve according to claim 7 is characterized in that: A plurality of first limiting holes (412) are provided inside the outer cylinder (41) in a vertical direction, a second limiting hole (421) is provided inside the inner cylinder (42), and the second limiting hole (421) is slidably connected to the inside of the first limiting hole (412) by a limiting pin (44).

9. The intelligent pressure-stabilizing differential regulating valve according to claim 8 is characterized in that: A plurality of scale lines (45) are arranged on the outer wall of the outer cylinder (41), the number of the scale lines (45) being equal to the number of the first limiting holes (412), and there is a one-to-one correspondence between the plurality of scale lines (45) and the plurality of first limiting holes (412).

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