CN116293010A

CN116293010A - Ultrahigh pressure regulating valve

Info

Publication number: CN116293010A
Application number: CN202310315518.3A
Authority: CN
Inventors: 李克乐; 赵满丰
Original assignee: Henan Fengda Intelligent Equipment Co ltd
Current assignee: Henan Fengda Intelligent Equipment Co ltd
Priority date: 2023-03-28
Filing date: 2023-03-28
Publication date: 2023-06-23

Abstract

The invention discloses an ultrahigh pressure regulating valve which comprises a valve body assembly, a valve rod assembly and a cylinder body; the valve body component is internally provided with a penetrating water flow channel, and the top wall of the valve body component is provided with a splicing hole; a hollow cavity is arranged in the cylinder body, and a diaphragm capable of vertically agitating is arranged in the cavity; the top of the valve rod assembly is connected to the lower side of the diaphragm; the top of the plug hole is provided with an internal thread section which is used for the lower end of the sleeve to be connected with the upper end of the plug hole in a threaded manner; the upper end of the sleeve is fixedly connected to the lower end of the cylinder body; the middle part of the valve rod assembly can be inserted into the sleeve in a vertical sliding way, and the upper assembly consisting of the valve rod assembly, the sleeve and the cylinder body can be integrally pulled out from the valve body assembly. The invention has simple structure, high reliability, convenient disassembly and assembly and low maintenance cost, has the function of automatic centering, ensures that the unloading water flow is kept stable, and is suitable for the working environment of ultrahigh pressure.

Description

Ultrahigh pressure regulating valve

Technical Field

The invention belongs to the technical field of valves, and particularly relates to an ultrahigh pressure regulating valve.

Background

The ultrahigh pressure unloading valve is also called an ultrahigh pressure regulating valve, is one of main accessories for regulating pipeline pressure, is often used in the ultrahigh pressure water cleaning industry, and has two main functions: 1. for adjusting the pressure of the outputted high-pressure water; 2. and the pressure is quickly released in emergency. The existing ultrahigh pressure unloading valve is complex in structure, is flushed by ultrahigh pressure water flow, is high in abrasion speed of parts such as a valve rod and the like, is low in service life, is troublesome in valve rod replacement, needs to detach parts in the valve in a large range, and is long in downtime and maintenance time, difficult to maintain and high in cost.

Disclosure of Invention

In order to overcome the defects in the background art, the invention provides an ultrahigh pressure regulating valve, which is designed to be suitable for ultrahigh pressure water flow, is convenient to overhaul and replace a valve rod, and further aims to improve overhaul efficiency and reduce use cost.

In order to achieve the above purpose, the present invention provides the following technical solutions:

an ultrahigh pressure regulating valve comprises a valve body assembly, a valve rod assembly and a cylinder body; a water flow channel penetrating through the left side wall and the right side wall of the valve body assembly is formed in the valve body assembly, and a plug hole communicated with the water flow channel is formed in the top wall of the valve body assembly; the cylinder body is positioned above the valve body assembly, a hollow cavity is formed in the cylinder body, and a diaphragm capable of vertically agitating is arranged in the cavity so as to divide the cavity into an upper cavity and a lower cavity; the top wall of the cylinder body is connected with an air source interface, and the air source interface is used for injecting high-pressure air into the upper cavity to drive the diaphragm to downwards blast; the top of the valve rod assembly is connected to the lower side of the diaphragm, and is used for driving the valve rod assembly to move downwards when the diaphragm is downwards moved;

the bottom of the valve body assembly is connected with a drainage assembly communicated with the water flow channel; a drain passage penetrating up and down is arranged in the drain assembly; a conical opening is arranged at the upper end of the drainage channel; the lower end of the valve rod assembly is provided with a conical head; the tapered head portion is insertable into the tapered mouth for closing the vent passage when the valve stem assembly is moved downwardly to an extreme position; the side wall of the lower end of the valve rod assembly, which is positioned in the water flow channel, is provided with a pressure bearing surface which is used for pushing the valve rod assembly to move upwards when high-pressure water is injected into the water flow channel;

the top of the plug hole is provided with an internal thread section which is used for the lower end of the sleeve to be connected with the upper end of the plug hole in a threaded manner; the upper end of the sleeve is fixedly connected to the lower end of the cylinder body; the middle part of the valve rod assembly can be inserted into the sleeve in a vertical sliding way, the outer diameter of the part of the valve rod assembly below the sleeve is smaller than the inner diameter of the internal thread section, and the valve rod assembly is used for being integrally pulled out of the valve body assembly when the threaded connection is released.

As a further optimization, the valve rod assembly comprises a push rod and a valve rod which can be separated from each other; the upper end of the ejector rod is connected to the lower side of the diaphragm, the middle of the ejector rod is inserted into the sleeve, and the lower end of the ejector rod is inserted into the inserting hole and is abutted against the upper end of the valve rod; the conical head is arranged at the lower end of the valve rod; clamping grooves are formed in the upper part of the valve rod and the side wall of the lower part of the ejector rod; a pair of connecting semi-rings are encircling at the joint of the valve rod and the ejector rod, and the upper end and the lower end of each connecting semi-ring are respectively provided with a clamping head part which can be clamped in the clamping groove; the outer wall of the connector semi-ring is propped against the inner wall of the plug hole.

As further optimization, the lower end of the valve rod is detachably connected with the valve core; the conical head is arranged at the lower end of the valve core; the outer diameter of the valve core is smaller than the diameter of the lower end face of the valve rod, and the stepped surface formed by the protrusion of the lower end face of the valve rod from the side wall of the valve core is used as the pressure bearing surface.

As further optimization, the center of the lower end face of the valve core is inserted with a fastening bolt, the upper end of the fastening bolt penetrates out of the upper end of the valve core and is screwed into a screw hole preset in the center of the valve rod, and the lower end of the valve rod is detachably connected with the valve core.

As further optimization, the top end of the valve rod is set to be a spherical surface; the clamping groove is in clearance fit with the clamping head portion.

As a further optimization, the leakage flow assembly comprises a valve seat and an overflow joint which are in up-down abutting connection; the centers of the valve seat and the overflow joint are respectively provided with a through hole for forming the drainage channel; the conical opening part is arranged at the upper end of the through hole of the valve seat; the overflow joint is connected to the bottom of the valve body assembly in a threaded mode.

As a further optimization, a sealing copper gasket is arranged between the valve seat and the overflow joint.

As further optimization, a diaphragm tray is arranged on the lower side of the diaphragm; the top of the valve rod assembly is connected to the diaphragm tray; a plurality of springs which are uniformly distributed around the circumference of the valve rod assembly are arranged in the lower cavity; the upper end and the lower end of the spring respectively prop up the diaphragm tray and the inner wall of the bottom of the cylinder body; and the bottom wall of the cylinder body is provided with a vent hole communicated with the lower cavity.

As further optimization, the upper end of the sleeve is provided with a flange for hooking in a stepped hole formed in the bottom wall of the cylinder body; the sleeve is fixedly connected with the cylinder body into a whole when the first locking nut presses the lower end face of the cylinder body.

As further optimization, the outer wall of the sleeve is connected with a second lock nut in a threaded manner, and the second lock nut is used for fixedly connecting the sleeve with the valve body assembly into a whole when the second lock nut presses the upper end face of the valve body assembly.

The invention has the beneficial effects that:

(1) The valve rod assembly is reasonable in structure, the original integrated valve rod is changed into a valve rod and valve core detachable structure, and the vulnerable part is changed into a valve core with lower cost from the integrated valve rod. The valve core is of an up-down symmetrical structure, and can be reinstalled and reused after being turned around after being worn, so that the use cost is reduced;

(2) The valve rod is connected with the top rod by adopting a half snap ring, so that the structure is quite reliable, and the disassembly, the assembly and the maintenance are convenient; and the automatic centering function is realized, so that the unloading water flow is kept stable, and the automatic centering device is more suitable for an ultrahigh-pressure working environment.

(3) The single-layer diaphragm structure in the cylinder body has simple structure and reliable work, optimizes the air passage and ensures the reliability of the pressure regulating valve. The final operation process is very simple, the compressed air regulating valve is arranged on the input compressed air pipeline, the regulating valve is twisted to adjust the pressure of the input compressed air, the pressure gauge in the high-pressure water pipeline can be found to be changed, and the required ultrahigh-pressure water pressure is finally obtained through adjusting the regulating valve.

(4) The valve rod or the valve core is replaced without tools, and the cylinder body can be disassembled by rotating the cylinder body by hands, so that a large amount of maintenance operation is greatly facilitated, the efficiency is improved, and the cost is reduced.

(5) The ultra-high pressure water flowing through the waterway is optimized, the condition that the valve core is eroded by the high pressure water is reduced, the pressure loss of the high pressure water flowing through the valve body 1 is greatly reduced, and the efficiency of the high pressure pump is improved.

In a word, this device simple structure, reliability are high, easy dismounting, and maintenance cost is low to have automatic aligning function, make the off-load rivers keep stable, be applicable to the operational environment of superhigh pressure.

Drawings

FIG. 1 is a schematic structural view of embodiment 1 of the present invention;

FIG. 2 is a schematic view of a partially installed structure at a spool in embodiment 1 of the present invention;

FIG. 3 is a schematic structural view of a top-loading assembly according to embodiment 1 of the present invention;

fig. 4 is a schematic outline structure of embodiment 1 of the present invention.

In the figure: 1 valve body, 2 valve seats, 3 valve rods, 4 connecting semi-rings, 5 ejector rods, 6 overflow joints, 7 connecting seats, 8 sealing copper gaskets, 9 first sealing rubber rings, 10 ultra-high molecular weight sealing rings, 11 second sealing rubber rings, 12 third sealing rubber rings, 13 fourth sealing rubber rings, 14 spring positioning columns, 15 sleeves, 16 lower shells, 17 upper shells, 18 diaphragms, 19 springs, 20 diaphragm trays, 21 air source interfaces, 22 second locking nuts, 23 copper sleeves, 24 first locking nuts, 100 cylinders, 101 water flow channels, 102 plug holes, 103 upper cavities, 104 lower cavities, 105 vent holes, 106 first overflow holes, 107 second overflow holes, 200 valve body components, 201 vent channels, 202 conical mouths, 203 observation windows, 300 valve rod components, 301 conical heads, 302 bearing surfaces, 303 valve cores, 304 fastening bolts, 305 spherical surfaces, 306 clamping grooves and 401 clamping heads.

Detailed Description

The following description of the embodiments of the present invention will be made more fully hereinafter with reference to the accompanying drawings, in which it is evident that the embodiments thus described are only some, but not all, of the preferred embodiments of the present invention. It should be understood by those skilled in the art that these embodiments are merely for explaining the technical principles of the present invention, and are not intended to limit the scope of the present invention.

Example 1: please refer to fig. 1-4;

the invention provides the following technical scheme: an ultra-high pressure regulating valve is applied to a high-pressure water cleaning system and comprises a valve body assembly 200, a valve rod assembly 300 and a cylinder body 100; the valve body assembly 200 comprises a valve body 1, a connecting seat 7, a sealing ring 10 exceeding the molecular weight, a second sealing rubber ring and a copper sleeve 23. The cylinder 100 comprises a lower housing 16, an upper housing 17, a diaphragm 18, a spring 19, a diaphragm tray 20, and an air source interface 21. The valve rod assembly 300 comprises a valve rod 3, a connector semi-ring 4, a push rod 5, a valve core 303 and a fastening bolt 304.

A water flow channel 101 penetrating through the left and right side walls of the valve body assembly 200 is arranged in the valve body assembly, and a plug hole 102 communicated with the water flow channel 101 is arranged on the top wall of the valve body assembly; the cylinder body 100 is positioned above the valve body assembly 200, a hollow cavity is formed in the cylinder body, and a diaphragm 18 capable of vertically pumping is arranged in the cavity to divide the cavity into an upper cavity 103 and a lower cavity 104; the top wall of the cylinder body 100 is connected with an air source interface 21 for injecting high-pressure air into the upper cavity 103 to drive the diaphragm 18 to downwards bulge; the top of the valve rod assembly 300 is connected to the lower side of the diaphragm 18, and is used for driving the valve rod assembly 300 to move downwards when the diaphragm 18 is downwards actuated; wherein, the lower side of the diaphragm 18 is provided with a diaphragm tray 20, the top of the valve rod assembly 300 is connected to the diaphragm tray 20, so as to avoid the damage of the diaphragm 18 caused by hard contact between the diaphragm 18 and the top of the valve rod assembly 300; a plurality of springs 19 are uniformly distributed around the valve rod assembly 300 in the lower cavity 104; the upper and lower ends of the spring 19 respectively support the diaphragm tray 20 and the inner wall of the bottom of the cylinder 100, so as to drive the upper cavity 103 to exhaust during resetting; a vent hole 105 communicating with the lower chamber 104 is formed in the bottom wall of the cylinder 100, so that the air resistance of the diaphragm 18 is reduced when the diaphragm is moved downward.

The bottom of the valve body assembly 200 is connected with a drainage assembly communicated with the water flow channel 101; a drain passage 201 penetrating up and down is arranged in the drain assembly; a tapered mouth 202 is provided at the upper end of the drain passage 201; the lower end of the valve rod assembly 300 is provided with a conical head 301; the tapered head 301 is insertable into the tapered mouth 202 for closing the drain passage 201 when the valve stem assembly 300 is moved downwardly to an extreme position; the side wall of the lower end of the valve rod assembly 300, which is positioned in the water flow channel 101, is provided with a pressure bearing surface 302 for pushing the valve rod assembly 300 to move upwards when high-pressure water is injected into the water flow channel 101. The principle is that the force applied by the pressure bearing surface 302 of the valve rod assembly 300 interacts with the thrust of the diaphragm 18, the size of an unloading gap can be changed by adjusting the pressure of compressed air input into the upper cavity 103, and the size of the unloading gap can determine the size of leakage so as to change the pressure of output high-pressure water, wherein the unloading gap is the conical surface gap between the conical head 301 and the conical mouth 202.

The leakage flow assembly comprises a valve seat 2 and an overflow joint 6 which are in up-down abutting connection; the centers of the valve seat 2 and the overflow joint 6 are respectively provided with a through hole for forming the drainage channel 201; the conical mouth 202 is arranged at the upper end of the through hole of the valve seat 2; the overflow joint 6 is screwed on the bottom of the valve body assembly 200. More preferably, a sealing copper gasket 8 is further arranged between the valve seat 2 and the overflow joint 6 to further improve the sealing performance.

The top of the plug hole 102 is provided with an internal thread section for the lower end of the sleeve 15 to be connected with the upper end of the plug hole 102 in a threaded manner; the upper end of the sleeve 15 is fixedly connected to the lower end of the cylinder body 100; the middle part of the valve rod assembly 300 is inserted into the sleeve 15 in a vertically sliding manner, the outer diameter of the part of the valve rod assembly 300 positioned below the sleeve 15 is smaller than the inner diameter of the internal thread section, and the upper assembly composed of the valve rod assembly 300, the sleeve 15 and the cylinder body 100 can be integrally pulled out from the valve body assembly 200 when the threaded connection is released. Therefore, the lower end of the valve rod assembly 300 which is easy to wear can be exposed by the integral disassembly and assembly of the upper assembly, and meanwhile, the components in the valve are not required to be disassembled in a large range, so that the upper assembly is convenient to overhaul; and, can still connect in the high-pressure water pipeline to the valve body assembly 200 itself, keep motionless, need not frequent dismouting pipeline joint to pipeline system shut down maintenance time shortens, and maintenance efficiency improves, and the cost is reduced.

Illustratively, in order to make the sleeve 15 itself detachable, the upper end of the sleeve 15 is provided with a flange for hooking into a stepped hole formed on the bottom wall of the cylinder 100; the outer wall of the sleeve 15 is in threaded connection with a first locking nut 24, and the sleeve 15 and the cylinder 100 are fixedly connected into a whole when the first locking nut 24 presses the lower end face of the cylinder 100.

In addition, in order to reliably connect the sleeve 15 with the valve body assembly 200 and prevent loosening, a second locking nut 22 is screwed on the outer wall of the sleeve 15, so that the sleeve 15 and the valve body assembly 200 are fixedly connected into a whole when the second locking nut 22 presses the upper end face of the valve body assembly 200.

The components in the water flow channel 101 are easily worn by being washed by ultra-high pressure water flow, wherein the lower end of the valve rod assembly 300 is most easily damaged, the valve rod assembly 300 is longer in length, the requirement on machining precision is high, and the machining cost is high. To further reduce costs, the entire valve stem assembly 300 does not need to be replaced, and thus, the valve stem assembly 300 includes the stem 3 and the stem 5 which are separable from each other; the upper end of the ejector rod 5 is connected to the lower side of the diaphragm 18, the middle part of the ejector rod is inserted into the sleeve 15, and the lower end of the ejector rod is inserted into the inserting hole 102 and is abutted against the upper end of the valve rod 3; the conical head 301 is arranged at the lower end of the valve rod 3; clamping grooves 306 are formed in the upper portion of the valve rod 3 and the side wall of the lower portion of the ejector rod 5; a pair of connecting semi-rings 4 are encircling at the joint of the valve rod 3 and the ejector rod 5, and the upper end and the lower end of each connecting semi-ring 4 are respectively provided with a clamping head part 401 which can be clamped and embedded in the clamping groove 306; the outer wall of the connector semi-ring 4 abuts against the inner wall of the plug hole 102. Therefore, after abrasion, only the valve rod 3 needs to be replaced, the processing difficulty of the shorter valve rod 3 is reduced, and therefore the size of vulnerable parts is reduced, the processing cost is reduced, and the maintenance cost is reduced. In addition, since the pair of connector half rings 4 can be assembled to the junction of the valve rod 3 and the push rod 5 outside the valve body assembly 200, the valve rod 3 can be easily assembled and disassembled.

Illustratively, in order to further reduce the cost, the lower end of the valve rod 3 is detachably connected to the valve core 303; the conical head 301 is arranged at the lower end of the valve core 303; the outer diameter of the valve core 303 is smaller than the diameter of the lower end face of the valve rod 3, and the stepped surface formed by protruding the lower end face of the valve rod 3 from the side wall of the valve core 303 is used as the pressure-bearing surface 302. It can be seen that the area of the pressure bearing face 302 is small and the area of the diaphragm 18 is large. According to the pascal principle, the pressure of the corresponding high-pressure water is much higher than the gas pressure of the upper cavity 103, so that the pressure regulating work of the ultra-high water pressure can be controlled by utilizing smaller gas pressure, and the water pressure regulating device is particularly suitable for an ultra-high pressure water pipeline system. The pressure-receiving surface 302 may be a flat surface, a tapered surface, or a chamfered surface at the edge, and an axial thrust force may be generated as long as a component force is applied to the normal direction of the surfaces and the axial direction of the valve stem 3. At this time, only the valve core 303 needs to be replaced after abrasion, and the volume of the replacement part is smaller and the cost is lower. An exemplary disassembling mode is that a fastening bolt 304 is inserted into the center of the lower end face of the valve core 303, and the upper end of the fastening bolt 304 penetrates out of the upper end of the valve core 303 and is screwed into a screw hole preset in the center of the valve rod 3, so as to be used for detachably connecting the lower end of the valve rod 3 with the valve core 303.

It should be noted that since the valve stem 3 and the stem 5 are separable, even if constrained by the pair of connector half rings 4, the coaxial precision of the valve stem 3 and the stem 5 is adversely affected. Unexpectedly, even though the coaxial accuracy may be reduced, it is advantageous for the relief gap between the tapered head 301 and the tapered mouth 202. The lower end of the valve rod 3 can slightly and freely swing, so that the unloading gap has an automatic aligning function; the annular unloading gap can be automatically adjusted when the water pressure fluctuates, so that the unloading water flow is kept stable, and the device is more suitable for an ultrahigh-pressure working environment.

In order to further exert the self-aligning function, the tip of the valve rod 3 is set to be a spherical surface 305; the clamping groove 306 is in clearance fit with the clamping head part 401, so that slight free swinging of the lower end of the valve rod 3 is facilitated.

When the device is used, the output flow of the high-pressure water in the high-pressure pipeline is fixed through the ultra-high pressure pump, and the diameter of the final jet flow nozzle is small, so that the pressure is gradually accumulated. In this case, a certain flow rate is released in order to change the pressure. The principle of the action is that the upper cavity 103 is slowly filled with compressed air, and the generated pressure is driven to act on the valve rod 3 through the diaphragm 18, so as to drive the valve rod 3 to move downwards. The step surface (i.e. the pressure bearing surface 302) of the valve rod 3 is driven by the high-pressure water pressure to move the valve rod 3 upwards, so that the pressure generated by the valve rod and the diaphragm 18 are balanced, namely, the high-pressure water pressure is higher than the pressure capable of moving the valve rod 3 towards the direction of the diaphragm 18, the discharged flow is large, the pressure is reduced, the unloading gap is reduced, the pressure of the high-pressure water is increased again, and finally, the balanced state is achieved. During maintenance, the valve body assembly 200 connected in the high-pressure pipeline can be kept still, the sleeve 15 is rotated after the second locking nut 22 is loosened, the threaded connection between the sleeve 15 and the valve body assembly 200 is released, and then the upper assembly formed by the valve rod assembly 300, the sleeve 15 and the cylinder body 100 is integrally pulled out of the valve body assembly 200. After that, the valve core 303 is removed and replaced, and the valve stem 3 is replaced if the valve stem 3 is deformed. Finally, the valve rod assembly 300 is reinserted into the valve body assembly 200, the second lock nut 22 is locked to complete the installation and fixation, and the system can be restarted.

The advantages of this embodiment are:

(1) The valve rod assembly 300 has reasonable structure, the original integrated valve rod 3 is changed into a detachable structure of the valve rod 3 and the valve core 303, and the vulnerable part is changed into the valve core 303 with lower cost from the integrated valve rod 3. The valve core 303 is of an up-down symmetrical structure, and the valve core 303 can be reinstalled and reused after being turned around after being worn, so that the use cost is reduced;

(2) The valve rod 3 and the ejector rod 5 are connected by adopting a half snap ring, so that the structure is quite reliable, and the disassembly, the assembly and the maintenance are convenient; and the automatic centering function is realized, so that the unloading water flow is kept stable, and the automatic centering device is more suitable for an ultrahigh-pressure working environment.

(3) The single-layer diaphragm 18 in the cylinder body 100 has simple structure and reliable operation, optimizes the air path and ensures the reliability of the unloading valve. The final operation process is very simple, the compressed air regulating valve is arranged on the input compressed air pipeline, the regulating valve is twisted to adjust the pressure of the input compressed air, the pressure gauge in the high-pressure water pipeline can be found to be changed, and the required ultrahigh-pressure water pressure is finally obtained through adjusting the regulating valve.

(4) The valve rod 3 or the valve core 303 is replaced without tools, and the cylinder body 100 can be disassembled by rotating the cylinder body by hands, so that the large-scale maintenance operation is greatly facilitated, the efficiency is improved, and the cost is reduced.

(5) The ultra-high pressure water flowing through the waterway is optimized, the condition that the valve core 303 is eroded by the high pressure water is reduced, the pressure loss of the high pressure water flowing through the valve body 1 is greatly reduced, and the efficiency of the high pressure pump is improved.

The invention has not been described in detail in the prior art; it should be understood by those skilled in the art that any combination of the features of the foregoing embodiments may be adopted, and that all possible combinations of the features of the foregoing embodiments are not described for brevity of description, however, such combinations are not to be considered as a contradiction between the features. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. An ultra-high pressure regulating valve comprises a valve body assembly (200), a valve rod assembly (300) and a cylinder body (100); the method is characterized in that: a water flow channel (101) penetrating through the left side wall and the right side wall of the valve body assembly (200) is arranged in the valve body assembly, and a plug hole (102) communicated with the water flow channel (101) is arranged on the top wall of the valve body assembly; the cylinder body (100) is positioned above the valve body assembly (200), a hollow cavity is formed in the cylinder body, and a diaphragm (18) capable of vertically agitating is arranged in the cavity to divide the cavity into an upper cavity (103) and a lower cavity (104); the top wall of the cylinder body (100) is connected with an air source interface (21) for injecting high-pressure air into the upper cavity (103) to drive the diaphragm (18) to downwards bulge; the top of the valve rod assembly (300) is connected to the lower side of the diaphragm (18) and is used for driving the valve rod assembly (300) to move downwards when the diaphragm (18) is downwards actuated;

the bottom of the valve body assembly (200) is connected with a drainage assembly communicated with the water flow channel (101); a drain passage (201) penetrating up and down is arranged in the drain assembly; a conical mouth (202) is arranged at the upper end of the drain flow channel (201); the lower end of the valve rod assembly (300) is provided with a conical head (301); the conical head (301) is insertable in the conical mouth (202) for closing the drain passage (201) when the valve stem assembly (300) is moved down to an extreme position; the side wall of the lower end of the valve rod assembly (300) positioned in the water flow channel (101) is provided with a pressure-bearing surface (302) for pushing the valve rod assembly (300) to move upwards when high-pressure water is injected into the water flow channel (101);

the top of the plug hole (102) is provided with an internal thread section, and the lower end of the sleeve (15) is in threaded connection with the upper end of the plug hole (102); the upper end of the sleeve (15) is fixedly connected to the lower end of the cylinder body (100); the middle part of the valve rod assembly (300) can be inserted into the sleeve (15) in a vertical sliding way, the outer diameter of the part of the valve rod assembly (300) positioned below the sleeve (15) is smaller than the inner diameter of the internal thread section, and the upper assembly consisting of the valve rod assembly (300), the sleeve (15) and the cylinder body (100) can be integrally pulled out from the valve body assembly (200) when the threaded connection is released.

2. The ultra-high pressure regulating valve according to claim 1, wherein: the valve rod assembly (300) comprises a push rod (5) and a valve rod (3) which can be separated from each other; the upper end of the ejector rod (5) is connected to the lower side of the diaphragm (18), the middle of the ejector rod is inserted into the sleeve (15), and the lower end of the ejector rod is inserted into the inserting hole (102) and is abutted against the upper end of the valve rod (3); the conical head (301) is arranged at the lower end of the valve rod (3);

clamping grooves (306) are formed in the upper portion of the valve rod (3) and the side wall of the lower portion of the ejector rod (5); a pair of connecting semi-rings (4) are encircling at the joint of the valve rod (3) and the ejector rod (5), and the upper end and the lower end of each connecting semi-ring (4) are respectively provided with a clamping head part (401) which can be clamped in the clamping groove (306); the outer wall of the connector semi-ring (4) is abutted against the inner wall of the plug hole (102).

3. The ultra-high pressure regulating valve according to claim 2, wherein: the lower end of the valve rod (3) is detachably connected with a valve core (303); the conical head (301) is arranged at the lower end of the valve core (303); the outer diameter of the valve core (303) is smaller than the diameter of the lower end face of the valve rod (3), and the stepped surface formed by the fact that the lower end face of the valve rod (3) protrudes out of the side wall of the valve core (303) is used as the pressure bearing surface (302).

4. The ultra-high pressure regulating valve according to claim 3, wherein: the valve is characterized in that a fastening bolt (304) is inserted into the center of the lower end face of the valve core (303), the upper end of the fastening bolt (304) penetrates out of the upper end of the valve core (303) and is screwed into a screw hole preset in the center of the valve rod (3) to be used for detachably connecting the valve core (303) with the lower end of the valve rod (3).

5. The ultra-high pressure regulating valve according to claim 4, wherein: the top end of the valve rod (3) is provided with a spherical surface (305); the clamping groove (306) is in clearance fit with the clamping head part (401).

6. The ultra-high pressure regulating valve according to claim 1, wherein: the leakage flow assembly comprises a valve seat (2) and an overflow joint (6) which are in up-down abutting connection; through holes are formed in the centers of the valve seat (2) and the overflow joint (6) and used for forming the drainage channel (201); the conical opening (202) is arranged at the upper end of the through hole of the valve seat (2); the overflow joint (6) is connected to the bottom of the valve body assembly (200) in a threaded mode.

7. The ultra-high pressure regulating valve according to claim 6, wherein: a sealing copper gasket (8) is arranged between the valve seat (2) and the overflow joint (6).

8. The ultra-high pressure regulating valve according to claim 1, wherein: a diaphragm tray (20) is arranged on the lower side of the diaphragm (18); the top of the valve rod assembly (300) is connected to the diaphragm tray (20); a plurality of springs (19) which are uniformly distributed around the valve rod assembly (300) are arranged in the lower cavity (104); the upper end and the lower end of the spring (19) respectively prop up the diaphragm tray (20) and the inner wall of the bottom of the cylinder body (100); a vent hole (105) communicated with the lower cavity (104) is formed in the bottom wall of the cylinder body (100).

9. The ultra-high pressure regulating valve according to claim 1, wherein: the upper end of the sleeve (15) is provided with a flange which is used for hooking in a stepped hole formed in the bottom wall of the cylinder body (100); the sleeve (15) is connected with a first lock nut (24) through threads on the outer wall of the sleeve, and the sleeve (15) and the cylinder (100) are fixedly connected into a whole when the first lock nut (24) presses the lower end face of the cylinder (100).

10. The ultra-high pressure regulating valve according to claim 9, wherein: the second lock nut (22) is connected to the outer wall of the sleeve (15) in a threaded mode, and is used for fixedly connecting the sleeve (15) with the valve body assembly (200) into a whole when the second lock nut (22) presses the upper end face of the valve body assembly (200).