CN216200923U

CN216200923U - Pressure regulating throttle valve

Info

Publication number: CN216200923U
Application number: CN202122519554.0U
Authority: CN
Inventors: 李雷生; 廖君承; 李纪荣
Original assignee: Guangdong Jingkeshi Power Technology Co ltd
Current assignee: Guangdong Jingkeshi Power Technology Co ltd
Priority date: 2021-10-19
Filing date: 2021-10-19
Publication date: 2022-04-05
Anticipated expiration: 2031-10-19

Abstract

The utility model discloses a pressure regulating throttle valve, comprising: the valve body is internally provided with an inlet cavity, an adjusting cavity and an outlet cavity, the top of the inlet cavity is provided with a first valve port communicated with the adjusting cavity, and the adjusting cavity is communicated with the outlet cavity; the first valve core is covered at the bottom of the first valve port in an openable manner; the valve rod is arranged in the adjusting cavity in a vertically moving mode, the bottom of the valve rod is connected with the top of the first valve core, and the outer side wall of the valve rod is sealed with the inner side wall of the adjusting cavity; and each adjusting mechanism comprises a first elastic piece and an adjusting piece, the adjusting piece is arranged above the valve rod, the first elastic piece is abutted against the adjusting piece and the valve rod, and the position of the adjusting piece can be adjusted in the vertical direction. According to the pressure-regulating throttling valve, the plurality of regulating parts simultaneously regulate the compression amount of the first elastic part matched with the regulating parts, so that the fluid pressure can be regulated in a large span, and the fluid pressure range regulated by the pressure-regulating throttling valve is greatly enlarged. The utility model can be applied to the field of balance valves.

Description

Pressure regulating throttle valve

Technical Field

The utility model relates to the field of balance valves, in particular to a pressure regulating throttle valve.

Background

The pressure-regulating throttle valve is a throttling element for regulating the pressure of the flowing fluid. The pressure regulating throttle valve is provided with a valve core, a valve port and a compression spring, wherein the compression spring is connected with the valve core, the valve core can be covered on the valve port in an openable manner, when fluid flows through the valve port to impact the valve core, the kinetic energy of the fluid is converted into the elastic potential energy of the compression spring, so that the kinetic energy and the flow rate of the fluid are reduced, the pressure of the fluid is reduced, and the pressure of the fluid flowing through the valve port is kept within a certain range. The existing pressure regulating throttle valve adjusts the fluid pressure flowing through the pressure regulating throttle valve by adjusting the compression amount of a compression spring, however, the range of the fluid pressure adjusted by the pressure regulating throttle valve is small due to the limited deformation degree of the compression spring.

SUMMERY OF THE UTILITY MODEL

The present invention is directed to a pressure regulating throttle valve, which solves one or more of the problems of the prior art and provides at least one of the advantages of the present invention.

The technical scheme adopted for solving the technical problems is as follows:

a pressure regulating throttle valve comprising:

the valve body is internally provided with an inlet cavity, an adjusting cavity and an outlet cavity, the position of the adjusting cavity relative to the inlet cavity is in the opposite upper direction, the top of the inlet cavity is provided with a first valve port communicated with the adjusting cavity, and the adjusting cavity is communicated with the outlet cavity;

the first valve core is covered at the bottom of the first valve port in an openable manner;

the valve rod is arranged in the adjusting cavity in a vertically moving mode, the bottom of the valve rod penetrates through the first valve port to be connected with the top of the first valve core, and the outer side wall of the valve rod is sealed with the inner side wall of the adjusting cavity;

the adjusting mechanism comprises a plurality of adjusting mechanisms, all of the adjusting mechanisms are arranged in the adjusting cavity, each adjusting mechanism comprises a first elastic piece and an adjusting piece, the adjusting pieces are arranged above the valve rods, the first elastic pieces are abutted against the bottoms of the adjusting pieces and the tops of the valve rods, and the positions of the adjusting pieces can be adjusted in the vertical direction.

The utility model has the beneficial effects that: the first valve core is covered at the bottom of the first valve port of the inlet cavity, the valve rod is arranged in the regulating cavity in a vertically moving manner, the first elastic piece of each regulating structure pushes the valve rod to move downwards to enable the first valve core to open downwards, when fluid enters the regulating cavity from the inlet cavity through the first valve port, as the outer side wall of the valve rod is sealed with the inner side wall of the regulating valve, the fluid pressure acts on the bottom of the valve rod and pushes the valve rod to move upwards, the first elastic piece is compressed, the valve rod pulls the first valve core to move upwards to reduce the opening degree of the first valve port, the fluid pressure is further reduced, the fluid pressure is balanced with the elasticity of all the first elastic pieces, and the fluid can continuously flow into the outlet cavity within a certain pressure range; when fluid pressure needs to be adjusted, the upper position and the lower position of any one or more adjusting pieces are adjusted, the compression amount of the first elastic piece matched with the adjusting piece is changed, the elastic force of the first elastic piece is changed, and then the fluid pressure flowing through the adjusting cavity is adjusted.

As a further improvement of the above technical solution, the pressure-regulating throttle valve further includes a second valve core, the second valve core is connected to the bottom of the first valve core, a transition cavity is provided inside the valve body, the transition cavity is provided below the inlet cavity, the transition cavity is communicated with the outlet cavity, a second valve port communicated with the transition cavity is provided at the bottom of the inlet cavity, the second valve core passes through the second valve port and extends into the transition cavity, and the second valve core can be covered at the bottom of the second valve port in an openable manner.

The transition cavity and the adjusting cavity are respectively positioned at the upper side and the lower side of the inlet cavity, when the first valve core moves upwards and drives the second valve core to move upwards to enable the first valve port to be communicated with the second valve port, the inlet cavity is communicated with the outlet cavity through the transition cavity and the adjusting cavity, and the flow rate of fluid flowing is increased; and the fluid pushes the thrust of the valve rod upwards in the adjusting cavity, the fluid pushes the thrust of the second valve core downwards in the transition cavity, and when the instantaneous fluid pressure is higher to push the valve rod to move upwards, the thrust of the fluid in the transition cavity to the second valve core helps to block the valve rod to move upwards, the valve rod is stabilized, and the valve rod is prevented from shaking violently in the up-and-down direction.

As a further improvement of the above technical solution, the pressure regulating throttle valve further includes a second elastic member, the second elastic member is disposed in the transition cavity, and the second elastic member is pressed against the bottom of the second valve core and the bottom wall of the transition cavity.

When the fluid pressure is larger, the fluid pushes the valve rod to move upwards to reduce the opening degrees of the first valve port and the second valve port, the second elastic piece is pressed against the bottom of the second valve core and the bottom wall of the transition cavity, the second elastic piece pushes the second valve core upwards, the fluid pressure required by the valve rod moving upwards is reduced, and therefore the lower limit value of the fluid pressure adjusted by the pressure-regulating throttle valve is further reduced.

As a further improvement of the above technical scheme, the bottom of valve body is equipped with the cavity, the cavity intercommunication the transition chamber, the pressure regulating choke valve still includes the bottom, bottom detachably lid is located the cavity, the top of bottom is equipped with spacing post, the bottom cover of second elastic component is located spacing post.

When the valve is in a working environment with lower fluid pressure, the bottom cover is detached from the concave cavity at the bottom of the valve body, so that the old second elastic piece can be detached conveniently and replaced by a new second elastic piece with a lower elastic coefficient.

As a further improvement of the above technical solution, each of the adjusting members includes a screw and a nut, the screw is connected to a top wall of the adjusting cavity, the screw extends in an up-and-down direction, the nut is connected to the screw in a matching manner, and the first elastic member is pressed against the bottom of the nut and the top of the valve rod.

The distance between the nut and the valve rod is changed by rotating the nut or the screw rod, so that the compression amount of the first elastic piece is adjusted, and the adjustment of the upper position and the lower position of the adjusting piece is more convenient.

As a further improvement of the technical scheme, each screw rod is rotatably connected to the top wall of the adjusting cavity, the outer diameters of the screw rods are sequentially increased from small to large, a mounting hole is formed in the middle of each screw rod, all the screw rods are sequentially sleeved outwards according to the sequence from small to large, all the nuts are arranged in all the mounting holes in a one-to-one correspondence mode, the mounting holes limit the rotational freedom degrees of the nuts, all the first elastic pieces are cylindrical, all the inner hole diameters of the first elastic pieces are sequentially increased from small to large, and each first elastic piece is arranged on the outer portion of each screw rod in a sleeved mode.

The outer diameters of all the screw rods are sequentially increased from small to large, the mounting outer diameters of all the screw rods are sequentially sleeved outwards from small to large, a first elastic piece is sleeved outside each screw rod, each nut is connected to the screw rods in a one-to-one corresponding matching mode, the mounting holes limit the freedom degree of rotation of the nuts, the nuts move along the up-and-down direction by rotating the screw rods, and then the compression amount of the first elastic pieces is changed.

As a further improvement of the above technical solution, each of the adjusting mechanisms further includes a knob, an opening is provided at the top of the adjusting cavity, the tops of all the screws extend upward out of the opening, and all the knobs are connected with all the screws in a one-to-one correspondence manner.

The top of each screw rod is connected with a knob, the screw rods are rotated by screwing the knobs, the nuts move in the up-down direction, the compression amount of the first elastic pieces is changed, and the operation of rotating the knobs is more convenient.

As a further improvement of the above technical solution, the valve body includes a base and a sleeve, a connecting hole is formed in the top of the base, the inlet chamber and the outlet chamber are located inside the base, the inlet chamber is communicated with the connecting hole through the first valve port, the connecting hole is communicated with the outlet chamber, the sleeve is detachably inserted into the connecting hole, the adjusting chamber is located inside the sleeve, and the bottom of the valve rod is detachably connected with the top of the first valve core.

The valve body comprises a base and a sleeve, the sleeve is detachably inserted into a connecting hole in the top of the base, so that the inside of the valve body forms an inlet cavity, an adjusting cavity and an outlet cavity, the bottom of the valve rod is detachably connected with the top of the first valve core, the sleeve is detached from the connecting hole, then the valve rod is separated from the first valve core, and parts such as the valve rod and an adjusting mechanism in the adjusting cavity of the sleeve are convenient to replace and maintain.

As a further improvement of the above technical solution, the valve rod includes a piston and a movable rod, the piston is disposed in the adjusting chamber in a vertically sliding manner, an outer sidewall of the piston is sealed with an inner sidewall of the adjusting chamber, a through hole extending in a vertical direction is disposed in a middle portion of the piston, the movable rod is disposed in the through hole in a vertically sliding manner, an outer sidewall of the movable rod is sealed with the inner sidewall of the through hole, a bottom of the movable rod extends downward and is connected to a top of the first valve element, a top of the movable rod is provided with an abutting portion extending outward, and bottoms of the first elastic members are abutted to tops of the abutting portion.

Utilize the piston to seal the space between movable rod and the regulation chamber, fluid in the regulation chamber is from up promoting piston and movable rod removal down, and the top of first case is connected to the bottom of movable rod, and the butt portion at movable rod top offsets with the bottom of first elastic component, then the elasticity of first elastic component promotes butt portion and removes downwards, makes the elasticity of first elastic component opposite with the pressure direction of fluid to piston and movable rod to help the valve rod to stabilize work.

Drawings

The utility model is further described with reference to the accompanying drawings and examples;

FIG. 1 is an exploded view of an embodiment of the pressure regulating throttle valve of the present invention;

FIG. 2 is a schematic cross-sectional view of an embodiment of the pressure regulating throttle valve provided by the present invention;

FIG. 3 is an exploded view of the pressure regulating throttle valve of the present invention, with one embodiment of the valve in operation;

fig. 4 is an exploded view of the pressure-regulating throttle valve according to the present invention, in which an adjusting mechanism is adjusted according to an embodiment of the utility model.

100. The valve comprises a valve body, 101, a base, 1011, a connecting hole, 102, a sleeve, 110, an inlet cavity, 111, a first valve port, 112, a second valve port, 120, an adjusting cavity, 121, an opening, 130, an outlet cavity, 140, a transition cavity, 150, a concave cavity, 160, a bottom cover, 161, a limiting column, 200, a first valve core, 210, a second valve core, 300, a valve rod, 310, a piston, 311, a through hole, 320, a movable rod, 321, an abutting part, 400, an adjusting mechanism, 410, a first elastic piece, 420, an adjusting piece, 421, a screw rod, 422, a nut, 423, a mounting hole, 430, a knob, 500 and a second elastic piece.

Detailed Description

Reference will now be made in detail to the present preferred embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to like elements throughout.

In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of 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 thus, should not be construed as limiting the present invention.

In the description of the present invention, if words such as "a plurality" are described, the meaning is one or more, the meaning of a plurality is two or more, more than, less than, more than, etc. are understood as excluding the present number, and more than, less than, etc. are understood as including the present number.

In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions.

Referring to fig. 1 to 4, the pressure regulating throttle valve of the present invention is made as follows:

the pressure-regulating throttle valve includes a valve body 100, a bottom cover 160, a first valve spool 200, a second valve spool 210, a valve rod 300, an adjusting mechanism 400, and a second elastic member 500.

The valve body 100 includes a base 101 and a sleeve 102. The inside of base 101 is equipped with from the past backward distribution in proper order get into chamber 110 and export chamber 130, gets into the front side and the external intercommunication in chamber 110, and the rear side and the external intercommunication in export chamber 130. The top of the base 101 is provided with a connection hole 1011, the connection hole 1011 extends downward, the connection hole 1011 is communicated with the front side of the outlet chamber 130, the top of the inlet chamber 110 is provided with a first valve port 111, and the first valve port 111 is communicated with the connection hole 1011. The sleeve 102 is of a cylindrical structure, the middle of the sleeve 102 is provided with the adjusting cavity 120 which is through in the vertical direction, the inner side wall of the connecting hole 1011 is provided with an internal thread, the outer side wall of the sleeve 102 is provided with an external thread, and the sleeve 102 is in threaded connection with the connecting hole 1011, so that a fluid channel which is communicated with the inlet cavity 110, the first valve port 111, the connecting hole 1011, the adjusting cavity 120 and the outlet cavity 130 is formed. The interior of the base 101 is provided with a transition cavity 140, the transition cavity 140 is located below the inlet cavity 110, the bottom of the inlet cavity 110 is provided with a second valve port 112, the second valve port 112 communicates the inlet cavity 110 with the transition cavity 140, and the rear side of the transition cavity 140 communicates with the front side of the outlet cavity 130. The bottom of the base 101 is provided with a cavity 150, the cavity 150 is communicated with the bottom of the transition cavity 140, the bottom cover 160 is installed in the cavity 150, the transition cavity 140 forms a closed cavity through screw connection between the bottom cover 160 and the base 101, the top of the bottom cover 160 is provided with a limiting column 161, and the limiting column 161 extends into the transition cavity 140.

The first spool 200 is disposed in the inlet chamber 110, the second spool 210 is disposed in the transition chamber 140, the bottom of the first spool 200 is connected to the top of the second spool 210, the first spool 200 is located at the bottom of the first port 111, and the second spool 210 is located at the bottom of the second port 112. The second elastic member 500 is disposed in the transition cavity 140, the second elastic member 500 is a compression spring, the second elastic member 500 is sleeved on the position-limiting post 161 of the bottom cover 160, the bottom of the second elastic member 500 abuts against the top of the bottom cover 160, the bottom of the second valve spool 210 is provided with a position-limiting hole for accommodating the top of the second elastic member 500, the position-limiting hole is opposite to the position-limiting post 161, the top of the second elastic member 500 is inserted into the position-limiting hole, and the second elastic member 500 is pressed against the bottom of the second valve spool 210 and the top of the bottom cover 160. The second elastic member 500 pushes the second valve spool 210 and the first valve spool 200 to move upward, so that the first valve spool 200 closes the first port 111 and the second valve spool 210 closes the second port 112.

The valve rod 300 is disposed in the adjusting chamber 120, the valve rod 300 includes a piston 310 and a movable rod 320, the adjusting chamber 120 is in a circular hole shape, a cross-sectional shape of the piston 310 corresponds to a cross-sectional shape of the adjusting chamber 120, the piston 310 is slidably disposed in the adjusting chamber 120 up and down, an outer sidewall of the piston 310 is provided with a sealing ring, and the sealing ring seals an outer sidewall of the piston 310 and an inner sidewall of the adjusting chamber 120. The middle part of the piston 310 is provided with a through hole 311 which is through along the up-down direction, the shape of the movable rod 320 is matched with the shape of the through hole 311, the movable rod 320 is arranged in the through hole 311 in a vertically sliding manner, the outer side wall of the movable rod 320 is provided with a sealing ring, and the outer side wall of the movable rod 320 is sealed with the inner side wall of the through hole 311 by the sealing ring. The bottom of the movable rod 320 sequentially penetrates through the through hole 311 and the first valve port 111 downwards and then extends into the inlet cavity 110, the top of the first valve core 200 is provided with an accommodating hole for accommodating the bottom of the movable rod 320, and the bottom of the movable rod 320 is inserted into the accommodating hole in the top of the first valve core 200, so that the bottom of the movable rod 320 is detachably connected with the first valve core 200. The top of the movable rod 320 is provided with an abutting portion 321 extending outwards, the abutting portion 321 is disc-shaped, the bottom of the abutting portion 321 abuts against the top of the piston 310, and a space is left between the top of the abutting portion 321 and the top wall of the adjusting cavity 120.

Two adjustment mechanisms 400 are disposed in the adjustment chamber 120, two adjustment mechanisms 400 are disposed on the top of the valve stem 300, and each adjustment mechanism 400 includes a first elastic member 410, an adjustment member 420, and a knob 430. Each adjusting member 420 comprises a screw 421 and a nut 422, a mounting hole 423 penetrating along the up-down direction is formed in the middle of the screw 421, and the nut 422 is connected with the screw 421 in a matching manner. The outer diameter of one screw 421 is smaller than the diameter of the mounting hole 423 of the other screw 421, so that the two screws 421 are sequentially sleeved from small to large according to the outer diameters, the first elastic element 410 is a compression spring, and one first elastic element 410 is sleeved outside each screw 421. The mounting hole 423 is a polygonal hole, the shape of the nut 422 matches the shape of the mounting hole 423, and the mounting hole 423 restricts the degree of freedom of rotation of the nut 422 about the vertical axis. The upper and lower ends of the first elastic element 410 are respectively abutted against the bottom of the nut 422 and the top of the abutting portion 321.

The top of adjusting chamber 120 is equipped with opening 121, and the top of two screw rods 421 all passes opening 121 and stretches out to the outside, and two knob 430 set up in opening 121 department from top to bottom at the interval, and every knob 430 is equipped with the mating holes that link up along upper and lower direction, and during screw rod 421 upwards stretched into the mating holes, made the top one-to-one connection of two knob 430 and two screw rods 421, then knob 430 can drive screw rod 421 and rotate in adjusting chamber 120. When any one of the knobs 430 rotates to rotate the screw 421 connected thereto, the nut 422 moves up and down along the screw 421 due to the mounting hole 423 limiting the degree of freedom of the nut 422 to rotate around the vertical axis, thereby changing the compression amount of the first elastic member 410 engaged therewith.

The elastic force of the two first elastic members 410 is greater than the elastic force of the second elastic member 500, and then the two first elastic members 410 push the valve rod 300, the first valve spool 200, and the second valve spool 210 to move downward, so that the first valve spool 200 opens the first valve port 111, and the second valve spool 210 opens the second valve port 112, that is, the pressure regulating throttle valve is in a normally open state.

When the pressure-regulating throttle valve works, fluid flows in from the inlet chamber 110, a first part of fluid enters the regulating chamber 120 through the first valve port 111 and then flows to the outlet chamber 130, the pressure of the first part of fluid on the valve rod 300 is upward, so that the first elastic member 410 is compressed, a second part of fluid flows to the outlet chamber 130 through the transition chamber 140, the pressure of the second part of fluid on the second valve spool 210 is downward, the downward elastic force of the first elastic member 410 on the valve rod 300, the downward pressure of the second part of fluid on the second valve spool 210, the downward gravity of the valve rod 300, the first valve spool 200 and the second valve spool 210, and after the upward pressure of the first part of fluid on the valve rod 300 and the upward elastic force of the second elastic member 500 on the second valve spool 210 are balanced, the first valve spool 200 is kept to open the first valve port 111, and the second valve spool 210 is kept to open the second valve port 112.

When the pressure of the fluid flowing into the inlet chamber 110 is higher, the fluid pushes the valve rod 300 to have higher upward pressure, the compression amount of the first elastic element 410 is increased, the first valve spool 200 closes the first port 111, the second valve spool 210 closes the second port 112, the fluid is blocked, and the fluid pressure pushes the first valve spool 200 to keep the first valve spool 200 closed to the first port 111; after the pressure of the fluid is reduced, since the fluid in the regulation chamber 120 has flowed out of the outlet chamber 130 and the pressure of the fluid entering the chamber 110 is reduced, the upward pressure of the fluid on the first valve spool 200 is reduced, so that the first elastic member 410 pushes the valve rod 300 and the first valve spool 200 to move downward, and the first valve port 111 and the second valve port 112 are reopened.

When the fluid pressure controlled by the pressure regulating throttle valve needs to be adjusted, the nut 422 moves up and down along the screw 421 by rotating any knob 430, so that the compression amount of the first elastic member 410 is changed, the downward elastic force of the first elastic member 410 on the valve rod 300 is changed, and the fluid pressure required for pushing the valve rod 300 to move upwards is changed.

In some embodiments, the adjusting mechanisms 400 have various structures, for example, all the adjusting mechanisms 400 are spaced apart, each adjusting mechanism 400 includes a pressing block and a first elastic member 410, the first elastic member 410 is pressed against the top of the valve rod 300, the pressing block is connected to the inner wall of the adjusting chamber 120 in a manner of moving up and down, the bottom of the pressing block is pressed against the top of the first elastic member 410, and the compression amount of the first elastic member 410 is changed by adjusting the up-and-down position of the pressing block.

While the preferred embodiments of the present invention have been illustrated and described, it will be understood by those skilled in the art that the present invention is not limited to the details of the embodiments shown and described, but is capable of numerous equivalents and substitutions without departing from the spirit of the utility model as set forth in the claims appended hereto.

Claims

1. A pressure regulating throttle valve is characterized in that: the method comprises the following steps:

the valve body (100) is internally provided with an inlet cavity (110), a regulating cavity (120) and an outlet cavity (130), the position of the regulating cavity (120) relative to the inlet cavity (110) is the opposite upper direction, the top of the inlet cavity (110) is provided with a first valve port (111) communicated with the regulating cavity (120), and the regulating cavity (120) is communicated with the outlet cavity (130);

a first valve body (200) which is openably and closably provided at the bottom of the first valve port (111);

a valve rod (300) which is arranged in the adjusting cavity (120) in a vertically moving mode, the bottom of the valve rod (300) penetrates through the first valve port (111) to be connected with the top of the first valve core (200), and the outer side wall of the valve rod (300) is sealed with the inner side wall of the adjusting cavity (120);

the adjusting mechanism (400) is arranged in the adjusting cavity (120), each adjusting mechanism (400) comprises a first elastic piece (410) and an adjusting piece (420), the adjusting pieces (420) are arranged above the valve rod (300), the first elastic pieces (410) are pressed against the bottom of the adjusting pieces (420) and the top of the valve rod (300), and the adjusting pieces (420) can be adjusted in position in the vertical direction.

2. The pressure-regulating throttle valve according to claim 1, characterized in that: the pressure-regulating throttle valve further comprises a second valve core (210), the second valve core (210) is connected with the bottom of the first valve core (200), a transition cavity (140) is arranged inside the valve body (100), the transition cavity (140) is arranged below the inlet cavity (110), the transition cavity (140) is communicated with the outlet cavity (130), a second valve port (112) communicated with the transition cavity (140) is arranged at the bottom of the inlet cavity (110), the second valve core (210) penetrates through the second valve port (112) and extends into the transition cavity (140), and the second valve core (210) can be arranged at the bottom of the second valve port (112) in an openable and closable manner.

3. The pressure-regulating throttle valve according to claim 2, characterized in that: the pressure regulating throttle valve further comprises a second elastic piece (500), the second elastic piece (500) is arranged in the transition cavity (140), and the second elastic piece (500) is abutted against the bottom of the second valve core (210) and the bottom wall of the transition cavity (140).

4. The pressure-regulating throttle valve of claim 3, wherein: the bottom of valve body (100) is equipped with cavity (150), cavity (150) intercommunication transition chamber (140), the pressure regulating choke valve still includes bottom (160), bottom (160) detachably lid is located cavity (150), the top of bottom (160) is equipped with spacing post (161), the bottom cover of second elastic component (500) is located spacing post (161).

5. The pressure-regulating throttle valve according to claim 1, characterized in that: each adjusting piece (420) comprises a screw rod (421) and a nut (422), the screw rod (421) is connected to the top wall of the adjusting cavity (120), the screw rod (421) extends in the up-down direction, the nut (422) is connected to the screw rod (421) in a matching mode, and the first elastic piece (410) is pressed against the bottom of the nut (422) and the top of the valve rod (300).

6. The pressure-regulating throttle valve according to claim 5, characterized in that: every screw rod (421) rotate connect in the roof of adjusting chamber (120), all the external diameter of screw rod (421) increases progressively from little to big in proper order, every the middle part of screw rod (421) is equipped with mounting hole (423), all screw rod (421) are according to the order of external diameter from little to big to establish outward jacket in proper order, all nut (422) one-to-one sets up in all in mounting hole (423), mounting hole (423) restriction nut (422) pivoted degree of freedom, all first elastic component (410) all are cylindric, all the hole diameter of first elastic component (410) increases progressively from little to big in proper order, every one is established to the outside cover of screw rod (421) first elastic component (410).

7. The pressure-regulating throttle valve of claim 6, wherein: each adjusting mechanism (400) further comprises a knob (430), an opening (121) is formed in the top of the adjusting cavity (120), the tops of all the screw rods (421) extend out of the opening (121), and all the knobs (430) are connected with all the screw rods (421) in a one-to-one correspondence mode.

8. The pressure-regulating throttle valve according to claim 1, characterized in that: the valve body (100) comprises a base (101) and a sleeve (102), a connecting hole (1011) is formed in the top of the base (101), the inlet cavity (110) and the outlet cavity (130) are located inside the base (101), the inlet cavity (110) is communicated with the connecting hole (1011) through the first valve port (111), the connecting hole (1011) is communicated with the outlet cavity (130), the sleeve (102) is detachably inserted into the connecting hole (1011), the adjusting cavity (120) is located inside the sleeve (102), and the bottom of the valve rod (300) is detachably connected with the top of the first valve core (200).

9. The pressure-regulating throttle valve according to claim 1, characterized in that: the valve rod (300) comprises a piston (310) and a movable rod (320), the piston (310) is arranged in the adjusting cavity (120) in a vertically sliding mode, the outer side wall of the piston (310) is sealed with the inner side wall of the adjusting cavity (120), a through hole (311) extending in the vertical direction is formed in the middle of the piston (310), the movable rod (320) is arranged in the through hole (311) in a vertically sliding mode, the outer side wall of the movable rod (320) is sealed with the inner side wall of the through hole (311), the bottom of the movable rod (320) extends downwards to be connected to the top of the first valve core (200), an abutting portion (321) extending outwards is arranged at the top of the movable rod (320), and all the bottoms of the first elastic pieces (410) are abutted to the top of the abutting portion (321).