CN111059304B

CN111059304B - Multi-channel regulating valve

Info

Publication number: CN111059304B
Application number: CN202010019804.1A
Authority: CN
Inventors: 李光东; 刘艳玲; 贾华; 赵文宝; 姜军
Original assignee: Wuzhong Instrument Co Ltd
Current assignee: Wuzhong Instrument Co Ltd
Priority date: 2020-01-09
Filing date: 2020-01-09
Publication date: 2022-01-21
Anticipated expiration: 2040-01-09
Also published as: CN111059304A

Abstract

The invention discloses a multi-channel regulating valve, comprising: the valve body is internally provided with an inflow cavity and an outflow cavity; the flow control mechanism is used for communicating or cutting off the inflow cavity and the outflow cavity, the flow control mechanism comprises a sleeve and a valve seat which are sequentially arranged in the valve body from top to bottom, and further comprises a valve core rod which can slide up and down and is arranged in the sleeve and the valve seat in a penetrating way, the bottom of the valve core rod is provided with a valve core head, and the valve core head comprises an upper cylinder and a lower cylinder which are in inverted conical surface transition; the side wall of the sleeve is provided with a flow regulating window, and the inner wall of the sleeve below the flow regulating window is provided with an annular sealing surface in sealing fit with the inverted conical surface; the inner wall of the valve seat is in clearance fit with the outer wall of the lower cylinder, first axial grooves are formed in the inner side of the upper end of the valve seat at intervals in the circumferential direction, and the cross sectional area of each first groove is gradually reduced from top to bottom. The multi-channel regulating valve can obviously prolong the service life of the regulating valve.

Description

Multi-channel regulating valve

Technical Field

The invention belongs to the technical field of regulating valves, and particularly relates to a multi-channel regulating valve.

Background

The regulating valve is a terminal control element which is most widely used in the field of petrochemical industry, the sealing performance of the regulating valve directly influences the quality of a final product and the safe operation of equipment, the single-seat regulating valve is a product structure which is most widely applied in the regulating valve, the service life of the existing single-seat regulating valve is short, the maintenance period is short, particularly the reliability of the internal sealing performance is poor, the single-seat regulating valve cannot operate for a long period, and the sealing performance can be ensured to meet the operation requirement of the equipment by frequent maintenance.

The main reason for analysis is that the sealing surface of the single-seat control valve is located near the minimum throttling surface, and the position of the minimum throttling surface is also the area where flash evaporation and corrosion are most likely to occur, so that the sealing surface is particularly prone to damage, the sealing performance of the valve is reduced, internal leakage exceeds the standard, the service life of the regulating valve is short, and the regulating valve is generally maintained once in one to two years.

Disclosure of Invention

In order to solve the problems that a sealing surface of a single-seat regulating valve is easy to damage, short in service life, short in maintenance period and the like, the invention solves the problems of a conventional regulating valve by a design principle of separating the sealing surface from a throttling surface, and further provides a multi-channel regulating valve.

In order to achieve the purpose, the invention adopts the technical scheme that: a multi-channel regulator valve comprising:

the valve body is internally provided with an inflow cavity and an outflow cavity;

the flow control mechanism is used for communicating or cutting off the inflow cavity and the outflow cavity, the flow control mechanism comprises a sleeve and a valve seat which are sequentially arranged in the valve body from top to bottom, and further comprises a valve core rod which can slide up and down and is arranged in the sleeve and the valve seat in a penetrating way, the bottom of the valve core rod is provided with a valve core head, and the valve core head comprises an upper cylinder and a lower cylinder which are in inverted conical surface transition; the side wall of the sleeve is provided with a flow regulating window, and the inner wall of the sleeve below the flow regulating window is provided with an annular sealing surface in sealing fit with the inverted conical surface; the inner wall of the valve seat is in clearance fit with the outer wall of the lower cylinder, first axial grooves are formed in the inner side of the upper end of the valve seat at intervals in the circumferential direction, and the cross sectional area of each first groove is gradually reduced from top to bottom. Further, the depth D of the first groove decreases from top to bottom to zero.

Furthermore, the upper part of the outer wall of the lower cylinder is provided with second grooves which are in one-to-one correspondence with the first grooves, and the second grooves are arc-shaped in the axial direction.

Furthermore, the widths of the first groove notch and the second groove notch on the same cross section are the same.

Furthermore, the flow regulating window corresponds to the first groove and the second groove one to one, the area of the sleeve regulating window is always 1.3-1.5 times of the area of the valve seat regulating window under any opening degree, the area of the sleeve regulating window is the inlet area of an upper throttling channel enclosed between the valve core head and the sleeve, and the area of the valve seat regulating window is the outlet area of a lower throttling channel enclosed between the lower cylinder and the first groove. The design ensures that the sealing inclined plane (namely the part on the inverted conical surface for sealing and matching with the annular sealing surface) of the valve core head only plays a sealing role and does not participate in regulation, and the design aim of separating the sealing surface of the valve core head from the throttling surface (namely the inlet of the lower throttling channel) is fulfilled.

Furthermore, the cross section of the first groove is in a semi-arc shape (other shapes are also possible, such as a U shape, a V shape and the like, but the semi-arc shape is preferred, and the processing is easier);

and/or the cross section of the second groove is in any one of arc shape, U shape, rectangle shape or V shape;

and/or a hard alloy layer is arranged outside the valve core head and/or on the annular sealing surface of the sleeve.

Furthermore, a valve core rod cavity is further arranged in the valve body, an inlet of the valve core rod cavity is formed in the upper end of the valve body, a valve cover is buckled at the inlet, an inner hole penetrating through the upper end face and the lower end face of the valve cover is formed in the valve cover, and the valve cover is connected with the valve body; the upper part of the valve core rod extends upwards into the inner hole through the valve core rod cavity and extends out of the valve cover; the valve comprises a valve cover and is characterized in that a first annular groove or a first annular boss is arranged at the lower end of the valve cover in the circumferential direction, a second annular boss or a second annular groove matched with the first annular groove or the first annular boss is arranged at the upper end of the valve cover in the circumferential direction, a third annular groove or a third annular boss is arranged at the lower end of the valve cover in the circumferential direction, and a fourth annular boss or a fourth annular groove matched with the third annular groove or the third annular boss is arranged at the upper end of the valve seat.

Furthermore, the valve cover is provided with a bolt for connecting with the valve body, the valve cover is fixedly arranged on the valve body through the bolt, and the valve cover, the sleeve, the valve seat and the valve body are sequentially pressed;

and/or, a guide sleeve is arranged in an inner hole of one end, close to the sleeve, of the valve cover, the outer wall of the guide sleeve is matched with the inner hole, the valve core rod is arranged in the guide sleeve, the inner hole of the guide sleeve is matched with the outer circle of the valve core rod, and a nitriding layer is arranged on the surface of the guide sleeve.

Furthermore, a packing pressing plate is arranged at the upper end of the valve cover and connected with the valve cover, a composite guide sleeve, a V-shaped packing and a spring which are sequentially connected from top to bottom are arranged in an inner hole at one end, close to the packing pressing plate, of the valve cover, a spring limiting surface is arranged on the side wall of the inner hole of the valve cover, and the lower end of the spring is elastically abutted to the limiting surface.

Still further, the lower end of the packing press plate is provided with a conical surface groove, and the upper end of the composite guide sleeve is provided with a conical surface boss matched with the conical surface groove;

and/or, circumference is equipped with three ring channel on the compound uide bushing, and three ring channel is from last to being first ring channel, second ring channel and third ring channel respectively down, first ring channel is located be located the hole upper end department of compound uide bushing, the second ring channel is located on the outer wall of compound uide bushing, the third ring channel is located the hole lower extreme department of compound uide bushing, be equipped with the dust ring in the first ring channel be equipped with first sealing washer in the second ring channel, be equipped with the second sealing washer in the third ring channel.

Compared with the prior art, the invention has the following technical effects: the invention solves the problems that the sealing surface of the valve core of the conventional single-seat plunger type regulating valve is close to the position of the minimum throttling, the flow rate at the position is fastest, the valve core is easy to be washed by a medium, the sealing performance is reduced, the service life of the valve is influenced, and the like, and has the following advantages: compared with the conventional regulating valve regulating mode, the first groove is formed in the inner wall of the upper end of the valve seat, and along with the upward or downward sliding of the valve core head 7, the outlet area (namely the area of the valve seat regulating window) of the formed lower throttling channel is increased or reduced, so that the purpose of regulating the flow is achieved, and the flow regulating position is changed from the original valve core to the valve seat. Meanwhile, the flow direction of the conventional regulating valve is changed from low inlet to high outlet, the sealing position is far away from the minimum throttling position of the valve, and the sealing surface (namely the part on the inverted conical surface for sealing and matching with the annular sealing surface) of the valve core is positioned in a high-pressure area, the internal pressure area of the valve is divided into three areas, the low-pressure area is closest to the saturated vapor pressure of fluid, the flow rate of the medium in the area is fastest, the flash cavitation phenomenon is most likely to occur to damage the valve internals and influence the service performance of the valve, the sealing surface of the valve core is designed to the position at the junction of the high-pressure area and the medium-pressure area by the valve with the design, the flow rate is 1/2 of the flow rate at the outlet of the valve seat (the specific relation of the flow rate is related to the specific design parameters of a sleeve regulating window, a valve core head and the valve seat, the flow rate is higher when the area is smaller), and the pressure at the position is far higher than the saturated vapor pressure of the medium, the probability of cavitation is reduced to 0 even, and the service life and the performance of the valve are further improved.

Drawings

Fig. 1 is a schematic structural diagram of a multi-channel regulating valve in an embodiment of the invention.

Fig. 2 is an enlarged view of a point a in fig. 1.

Fig. 3 is a schematic structural diagram of a valve core rod and a valve core head in the multi-channel regulating valve according to the embodiment of the invention.

Fig. 4 is a cross-sectional view taken at a-a in fig. 3.

Fig. 5 is an assembly view of the valve core head, the sleeve and the valve seat in the open state of the multi-channel regulating valve in the embodiment of the invention.

Fig. 6 is a schematic cross-sectional view at B-B in fig. 5.

FIG. 7 is a schematic diagram of a valve seat of the multi-channel regulator valve according to the embodiment of the invention.

FIG. 8 is a schematic cross-sectional view at C-C of FIG. 7.

Fig. 9 is a schematic structural diagram of a sleeve in the multi-channel regulating valve in the embodiment of the invention.

FIG. 10 is a cross-sectional view of a sleeve in a multi-channel regulator valve in accordance with an embodiment of the present invention.

FIG. 11 is a schematic illustration of the area S of the sleeve adjustment window and the area E of the seat adjustment window of the multi-channel regulator valve in an embodiment of the present invention.

FIG. 12 is a schematic diagram showing the distribution of high pressure, intermediate sub-zones and low pressure zones in the open state of the multi-channel regulator valve in accordance with the present invention, wherein the arrows indicate the direction of fluid flow.

Fig. 13 is an assembly view of the valve core head, the sleeve and the valve seat in a closed state of the multi-channel regulating valve in the embodiment of the invention.

The reference numbers in the figures are: 1. the valve comprises a valve body, 2, an inflow cavity, 3, an outflow cavity, 4, a sleeve, 401, a flow regulating window, 402, an annular sealing surface, 403, a second annular groove, 404, a third annular groove, 5, a valve seat, 501, a first groove, 502, a fourth annular boss, 6, a valve core rod, 7, a valve core head, 701, an upper cylinder, 702, a conical surface, 703, a lower cylinder, 704, a second groove, 8, a valve cover, 801, a first annular boss, 9, a guide sleeve, 10, a packing press plate, 11, a composite guide sleeve, 12, V-shaped packing, 13, a dust ring, 14, a first sealing ring, 15, a second sealing ring and 16 springs.

Detailed Description

The present invention is not limited to the following embodiments, and those skilled in the art can implement the present invention in other embodiments according to the disclosure of the present invention, or make simple changes or modifications on the design structure and idea of the present invention, and fall into the protection scope of the present invention. It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like, indicate orientations or positional relationships based on those shown in the drawings, and are used only for convenience in describing the present invention and for simplicity in description, and do not indicate or imply that the referenced devices or elements must have a particular orientation, be constructed and operated in a particular orientation, and thus, are not to be construed as limiting the present invention. Furthermore, the terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first," "second," etc. may explicitly or implicitly include one or more of that feature. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art through specific situations.

The embodiment of the invention is shown in fig. 1 to 13, and the multichannel regulating valve comprises a valve body 1, wherein an inflow cavity 2 and an outflow cavity 3 are arranged inside the valve body 1, and specifically, an outlet of the inflow cavity 2 is positioned right above an inlet of the outflow cavity 3. The valve core device further comprises a flow control mechanism for communicating or cutting off the inflow cavity 2 and the outflow cavity 3, wherein the flow control mechanism comprises a sleeve 4 and a valve seat 5 which are sequentially arranged in the valve body 1 from top to bottom, a valve core rod 6 which can slide up and down and is arranged in the sleeve and the valve seat in a penetrating mode, a valve core head 7 is arranged at the bottom of the valve core rod 6, and the valve core head 7 comprises an upper cylinder 701 and a lower cylinder 703 which are in transition through an inverted conical surface 702. The side wall of the sleeve 4 is provided with a flow regulating window 401, and the inner wall of the sleeve below the flow regulating window is provided with an annular sealing surface 402 which is in sealing fit with the inverted conical surface 702. The inner wall of the valve seat 5 is in clearance fit with the outer wall of the lower cylinder 703, first grooves 501 are formed in the inner side of the upper end of the valve seat 5 at intervals in the circumferential direction, and the cross sectional area of each first groove 501 is gradually reduced from top to bottom.

Specifically, the upper portion of the outer wall of the lower cylinder 703 is provided with second grooves 704 corresponding to the first grooves 501 one to one, and the second grooves 704 are in an axial shape and arc-shaped in the axial direction. The width of the notch of the first groove 501 and the notch of the second groove 704 on the same cross section are the same. The flow rate adjustment windows 401 correspond to the first grooves 501 and the second grooves 704 one by one, and in this embodiment, the number of the first grooves 501, the second grooves 704, and the flow rate adjustment windows 401 is 8 (but the number is changed according to different valve parameters), so that the upper throttling channel surrounded by the valve core head and the sleeve has 8 upper throttling channel inlets in total, and the second grooves 704 of the lower cylinder and the first grooves 501 surround 8 independent lower throttling channels in total. The first grooves have a certain angle α with the valve seat axis (i.e., the depth D of the first grooves 501 decreases from top to bottom to zero), the angle and the number of the first grooves can be adjusted according to the difference between the flow rate characteristics and the rated flow capacity, and the size of each first groove and the angle between the first groove and the valve seat axis can be the same or different.

Valve import flow is adjusted through 8 semicircle windows of 8 recesses and disk seat that flow is cut apart into with fluid through the flow control window, and finally this 8 fluid has certain angle (the angle between first recess and the disk seat axis) to collect with the disk seat axis in throttle channel exit under, and the in-process that flow was collected, 8 fluid each other dashes, convert fluid kinetic energy into internal energy and energy consumption, and then just also reduced the efficiency that fluid kinetic energy converted into the sound wave, and then just also reduced the production of noise. During the period that 8 flows through the sleeve valve core and the valve seat, the two flows do not interfere with each other and flow independently.

At any opening, the area S of the sleeve adjusting window is always 1.3 to 1.5 times (specifically 1.3 times in this embodiment) the area E of the valve seat adjusting window, the area of the sleeve adjusting window is the inlet area of the upper throttling channel enclosed between the valve core head 7 and the sleeve 4, and the area of the valve seat adjusting window is the outlet area of the lower throttling channel enclosed between the second groove 704 and the first groove 501.

More specifically, the cross section of the first groove 501 is a semicircular arc, and the cross section of the second groove 704 may be any one of an arc, a U-shape, a rectangle, or a V-shape, and the U-shape is selected in this embodiment. A hard alloy layer is arranged on the outer part of the valve core head 7 and the annular sealing surface 402 of the sleeve, and the hard alloy layer is preferably stellite (the stellite is selected to improve the reliability and the anti-scouring performance of the sealing surface).

A valve core rod cavity is further arranged in the valve body 1, an inlet of the valve core rod cavity is formed in the upper end of the valve body 1, a valve cover 8 is buckled at the inlet, an inner hole penetrating through the upper end face and the lower end face of the valve cover 8 is formed in the valve cover 8, and the valve cover 8 is connected with the valve body 1; the upper part of the valve core rod 6 extends upwards into the inner hole through the valve core rod cavity and extends out of the valve cover 8. The inner side of the lower end of the valve cover 8 is circumferentially provided with a first annular boss 801, the upper end of the sleeve 4 is circumferentially provided with a second annular groove 403 matched with the first annular boss 801, the inner side of the lower end of the sleeve 4 is circumferentially provided with a third annular groove 404, and the inner side of the upper end of the valve seat 5 is circumferentially provided with a fourth annular boss 502 matched with the third annular groove 404.

The valve cover 8 is provided with a bolt for connecting with the valve body 1, the valve cover 8 is fixedly arranged on the valve body 1 through the bolt, and the valve cover 8, the sleeve 4, the valve seat 5 and the valve body 1 are sequentially pressed;

the valve gap 8 is equipped with uide bushing 9 in being close to the hole of the one end of sleeve 4, the outer wall of uide bushing 9 with the hole cooperation, the uide bushing 9 is arranged in to case pole 6, the hole of uide bushing 9 with the excircle cooperation of case pole 6, the surface of uide bushing 9 is equipped with the nitriding layer.

The upper end of valve gap 8 is equipped with packing clamp plate 10, and packing clamp plate 10 is connected with valve gap 8, is equipped with compound uide bushing 11, V-arrangement filler 12 and spring 16 from last to down in proper order in the hole that the valve gap is close to packing clamp plate one end, the lateral wall of the hole of valve gap is equipped with the spacing face of spring, the spring lower extreme with spacing face elasticity butt.

The lower end of the packing press plate 10 is provided with a conical surface groove, and the upper end of the composite guide sleeve 11 is provided with a conical surface boss matched with the conical surface groove. Circumference is equipped with three ring channel on the compound uide bushing 11, and three ring channel is from last to being first ring channel, second ring channel and third ring channel respectively down, first ring channel is located the hole upper end department of compound uide bushing, the second ring channel is located on the outer wall of compound uide bushing, the third ring channel is located the hole lower extreme department of compound uide bushing, be equipped with dust ring 13 in the first ring channel be equipped with first sealing washer 14 in the second ring channel, be equipped with second sealing washer 15 in the third ring channel.

The annular sealing surface 402 is designed at the position of the sleeve above the first groove in the valve seat, if the valve generates flash evaporation cavitation in the adjusting process, the area generated at the moment is at the outlet of the lower throttling channel surrounded by the lower cylinder and the first groove, in addition, from the view of the whole flow velocity distribution of the valve body, the position with the highest flow velocity is also at the outlet of the lower throttling channel surrounded by the lower cylinder and the first groove, the annular sealing surfaces of the valve core and the sleeve at the moment are at the upstream position of the throttling port, the flow velocity at the sealing surface of the valve core sleeve in the separated state is also the minimum, and the flushing damage to the annular sealing surface of the sleeve and the sealing surface of the valve core is also avoided.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the technical scope of the present invention, and the technical solutions and their concepts should be equivalent or changed within the technical scope of the present invention.

Claims

1. A multi-channel regulator valve characterized by: the method comprises the following steps:

the valve comprises a valve body (1), wherein an inflow cavity (2) and an outflow cavity (3) are arranged inside the valve body (1);

the flow control mechanism is used for communicating or cutting off the inflow cavity (2) and the outflow cavity (3), the flow control mechanism comprises a sleeve (4) and a valve seat (5) which are sequentially arranged in the valve body (1) from top to bottom, and further comprises a valve core rod (6) which can slide up and down and is arranged in the sleeve and the valve seat in a penetrating manner, a valve core head (7) is arranged at the bottom of the valve core rod (6), and the valve core head (7) comprises an upper cylinder (701) and a lower cylinder (703) which are transited by an inverted conical surface (702); a flow regulating window (401) is formed in the side wall of the sleeve (4), and an annular sealing surface (402) in sealing fit with the conical surface (702) is arranged on the inner wall of the sleeve below the flow regulating window; the inner wall of the valve seat (5) is in clearance fit with the outer wall of the lower cylinder (703), first grooves (501) along the axial direction are formed in the inner side of the upper end of the valve seat (5) at intervals in the circumferential direction, and the cross sectional area of each first groove (501) is gradually reduced from top to bottom;

the depth D of the first groove (501) is decreased to zero from top to bottom;

second grooves (704) which are in one-to-one correspondence with the first grooves (501) are formed in the upper portion of the outer wall of the lower cylinder (703), the second grooves (704) are in an axial direction, and the second grooves are arc-shaped in the axial direction;

the second grooves (704) correspond to the first grooves (501) one by one and enclose lower throttling channels which are corresponding to the first grooves (501) in number and are independent of each other;

the flow regulating window (401) corresponds to the first groove (501) and the second groove (704) uniformly, the area of the sleeve regulating window is 1.3-1.5 times of the area of the valve seat regulating window all the time under any opening degree, the area of the sleeve regulating window is the inlet area of an upper throttling channel enclosed between the valve core head (7) and the sleeve (4), and the area of the valve seat regulating window is the outlet area of a lower throttling channel enclosed between the second groove (704) and the first groove (501).

2. The multiple channel regulator valve of claim 1, wherein: the width of the notch of the first groove (501) and the width of the notch of the second groove (704) on the same cross section are the same.

3. The multiple channel regulator valve of claim 1, wherein: the cross section of the first groove (501) is in a semi-circular arc shape;

and/or the cross-sectional shape of the second groove (704) is any one of arc, U-shaped, rectangular or V-shaped;

and/or a hard alloy layer is arranged on the outer part of the valve core head (7) and/or the annular sealing surface (402) of the sleeve.

4. The multiple channel regulator valve of claim 1, wherein: a valve core rod cavity is further arranged in the valve body (1), an inlet of the valve core rod cavity is formed in the upper end of the valve body (1), a valve cover (8) is buckled at the inlet, an inner hole penetrating through the upper end face and the lower end face of the valve cover (8) is formed in the valve cover (8), and the valve cover (8) is connected with the valve body (1); the upper part of the valve core rod (6) extends upwards into the inner hole through the valve core rod cavity and extends out of the valve cover (8); the lower extreme circumference of valve gap (8) is equipped with first annular groove or first annular boss (801), the inboard circumference in upper end of sleeve (4) be equipped with first annular groove or first annular boss (801) matched with second annular boss or second annular groove (403), the inboard circumference in lower extreme of sleeve (4) is equipped with third annular groove (404) or third annular boss, the upper end of disk seat (5) be equipped with third annular groove (404) or third annular boss complex fourth annular boss (502) or fourth annular groove.

5. The multiple channel regulator valve of claim 4, wherein: the valve cover (8) is provided with a bolt for connecting with the valve body (1), the valve cover (8) is fixedly arranged on the valve body (1) through the bolt, and the valve cover (8), the sleeve (4), the valve seat (5) and the valve body (1) are sequentially pressed;

and/or, be equipped with uide bushing (9) in the hole of valve gap (8) one end near sleeve (4), the outer wall of uide bushing (9) with the hole cooperation, guide bushing (9) is arranged in to case pole (6), the hole of uide bushing (9) with the excircle cooperation of case pole (6), the surface of uide bushing (9) is equipped with the nitriding layer.

6. The multiple channel regulator valve of claim 4, wherein: the upper end of valve gap (8) is equipped with packing plate (10), packing plate (10) with valve gap (8) are connected, the valve gap is close to and is equipped with compound uide bushing (11), V-arrangement filler (12) and spring (16) from last to down in proper order in the hole of packing plate one end, the lateral wall of the hole of valve gap is equipped with the spacing face of spring, the spring lower extreme with the spacing face elasticity butt of spring.

7. The multiple channel regulator valve of claim 6, wherein: the lower end of the packing press plate (10) is provided with a conical surface groove, and the upper end of the composite guide sleeve (11) is provided with a conical surface boss matched with the conical surface groove;

and/or, circumference is equipped with three ring channel on compound uide bushing (11), and three ring channel is from last to being first ring channel, second ring channel and third ring channel respectively down, first ring channel is located the hole upper end department of compound uide bushing, the second ring channel is located on the outer wall of compound uide bushing, the third ring channel is located the hole lower extreme department of compound uide bushing, be equipped with dust ring (13) in the first ring channel be equipped with first sealing washer (14) in the second ring channel, be equipped with second sealing washer (15) in the third ring channel.