CN212584286U

CN212584286U - Dynamic balance valve

Info

Publication number: CN212584286U
Application number: CN202020887621.7U
Authority: CN
Inventors: 金法宝
Original assignee: Individual
Current assignee: Individual
Priority date: 2020-05-23
Filing date: 2020-05-23
Publication date: 2021-02-23
Anticipated expiration: 2030-05-23

Abstract

The utility model discloses a dynamic balance valve relates to control valve technical field, and its technical scheme main points are: the mounting cavity is communicated with the liquid flow channel, and the switch static ceramic sheet slides in the positioning part through the first limiting part, so that the switch static ceramic sheet is circumferentially fixed in the mounting cavity; the switch movable ceramic chip is arranged above the switch static ceramic chip, the valve cover slides in the positioning part through the second limiting part, so that the valve cover is circumferentially fixed in the mounting cavity in a positioning manner, and the fastener axially fixes the valve cover in the mounting cavity; the valve rod runs through the valve cover and is connected with the switch movable ceramic chip, and the partition part that the lower end of the valve rod set up separates the valve cover from the switch movable ceramic chip, so that the switch movable ceramic chip and the switch static ceramic chip are all communicated with the liquid flow channel, the switch movable ceramic chip can be driven to rotate by rotating the valve rod, so that the switch movable ceramic chip is separated from the liquid flow channel, and the valve rod is rotated reversely, so that the switch movable ceramic chip is communicated with the liquid flow channel.

Description

Dynamic balance valve

Technical Field

The utility model relates to a control valve technical field, in particular to dynamic balance valve.

Background

The dynamic balance valve is used in water system needing flow control, especially flow balance of non-corrosive liquid medium for heat supply, air conditioner, etc.

The dynamic balance valve in the prior art is too complex in structure, and particularly, a shut-off component is additionally arranged in a valve body, so that the dynamic balance valve has numerous parts and is inconvenient to assemble, and the production efficiency is low; the work of opening and close the valve body is carried out for a long time to the shutoff part in the valve body for the shutoff part easily produces wearing and tearing, and after reaching the life limit of shutoff part, the shutoff part can damage in the valve body, need dismantle the back with the valve body, just can change the shutoff part of damage, because its equipment is inconvenient, brings the inconvenience for the user easily.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims to provide a dynamic balance valve, it has the convenient advantage of loading and unloading.

The above technical purpose of the present invention can be achieved by the following technical solutions: a dynamic balance valve comprises a valve body, a switch movable ceramic sheet, a switch static ceramic sheet, a valve rod and a valve cover, wherein a liquid flow channel is arranged in the valve body, an installation cavity communicated with the liquid flow channel is formed in the outer side of the valve body, a positioning part is arranged in the installation cavity, a first limiting part is arranged on the outer side of the switch static ceramic sheet, the first limiting part slides in the positioning part along the vertical direction so as to circumferentially fix the switch static ceramic sheet in the installation cavity, the switch movable ceramic sheet is arranged on the upper end face of the switch static ceramic sheet, and the switch static ceramic sheet and the switch movable ceramic sheet are communicated with the liquid flow channel; the valve cover is characterized in that a second limiting part is arranged on the outer side of the valve cover, the second limiting part slides in the positioning part along the vertical direction, so that the valve cover is circumferentially fixed in the installation cavity, the valve cover is located above the opening and closing movable ceramic pieces, the valve cover is circumferentially fixed in the installation cavity through fasteners, the valve rod penetrates through the valve cover and is circumferentially fixed with the opening and closing movable ceramic pieces, a separating part for separating the valve cover from the opening and closing movable ceramic pieces is arranged at the lower end of the valve rod, and the valve rod can control the opening and closing movable ceramic pieces to rotate, so that the opening and closing movable ceramic pieces can communicate or separate the.

Through the technical scheme, the installation cavity is communicated with the liquid flow channel, and the switch static ceramic sheet slides in the positioning part through the limiting part I, so that the switch static ceramic sheet is circumferentially fixed in the installation cavity; the switch movable ceramic chip is arranged above the switch static ceramic chip, the valve cover slides in the positioning part through the second limiting part, so that the valve cover is circumferentially fixed in the mounting cavity in a positioning manner, and the fastener axially fixes the valve cover in the mounting cavity; the valve rod penetrates through the valve cover and is connected with the switch movable ceramic chip, the valve cover and the switch movable ceramic chip are separated by the separating portion arranged at the lower end of the valve rod, the switch movable ceramic chip and the switch static ceramic chip are both communicated with the liquid flow channel, the switch movable ceramic chip can be driven to rotate by rotating the valve rod, the switch movable ceramic chip is separated from the liquid flow channel, and the valve rod is rotated reversely, so that the switch movable ceramic chip is communicated with the liquid flow channel. Set up location portion in the installation cavity, slide in location portion through spacing one, alright realize that the circumference of switching movable ceramic chip is fixed, the valve rod is pegged graft in the valve gap, and spacing two slide in location portion, alright realize that the circumference of valve gap is fixed with the valve rod axial fixity, the partition separates valve gap and switching movable ceramic chip, and the rethread fastener is fixed in the installation cavity with the valve gap axial, and the part installation of installation intracavity is accomplished to this realizes the convenient purpose of this balance valve loading and unloading.

Preferably, a first retaining shoulder and a second retaining shoulder are arranged in the mounting cavity in parallel, a first positioning groove is formed in the first retaining shoulder, a second positioning groove is formed in the second retaining shoulder, the first positioning groove and the second positioning groove are arranged coaxially, and the positioning part comprises the first positioning groove and the second positioning groove; the first limiting part comprises a first limiting block arranged on the outer side of the switch static ceramic chip, and the first limiting block slides in the first positioning groove; the second limiting part comprises a second limiting block arranged on the outer side of the valve cover, and the second limiting block slides in the second positioning groove.

Through the technical scheme, keep off shoulder one and keep off two parallel arrangement in the installation intracavity, and keep off and be provided with the constant head tank one that supplies stopper one to slide on the shoulder one to be fixed in the installation intracavity with the quiet ceramic chip circumference of switch, keep off and be provided with the constant head tank two that supplies stopper two to slide on the shoulder two, make and press cap circumference to be fixed in the installation intracavity.

Preferably, the first blocking shoulder is located below the second blocking shoulder, a sealing groove is formed between the first blocking shoulder and the bottom of the installation cavity, a sealing ring is arranged in the sealing groove, and the upper end of the sealing ring is attached to the upper end of the switch static ceramic chip.

Through the technical scheme, the lower end of the switch static ceramic sheet is placed on the sealing ring, and the switch static ceramic sheet is in contact with the bottom of the mounting cavity through the sealing ring, so that abrasion generated between the switch static ceramic sheet and the bottom of the mounting cavity is reduced.

Preferably, the side edge of the valve cover is provided with a third blocking shoulder, the third blocking shoulder is positioned above the second limiting block, and the lower end of the third blocking shoulder abuts against the upper end of the second blocking shoulder.

Through the technical scheme, the valve cover is placed on the second retaining shoulder through the third retaining shoulder, so that the two pairs of retaining shoulders are axially limited, and the valve cover is conveniently and axially fixed in the mounting cavity by the fastening piece; meanwhile, a gap communicated with the liquid flow channel is ensured to exist between the opening and closing movable ceramic sheet and the valve cover.

Preferably, the switch static ceramic chip is provided with a first through hole communicated with the liquid flow channel, the switch movable ceramic chip is provided with a second through hole communicated with the first through hole, and the center of gravity of the switch movable ceramic chip is provided with a connecting hole for the lower end of the valve rod to be inserted.

Through the technical scheme, after the switch static ceramic chip is axially fixed in the installation cavity, the first through hole is communicated with the liquid flow channel, the lower end of the valve rod is inserted into the connecting hole, and then the valve rod can control the switch movable ceramic chip to rotate above the switch static ceramic chip, so that the first through hole is communicated or not communicated with the second through hole, and the communication of the switch movable ceramic chip or the partition of the liquid flow channel is realized.

Preferably, the partition includes a protrusion provided at a lower end of the valve stem.

Through above-mentioned technical scheme, the arch is separated the switch and is moved ceramic chip and valve gap for the clearance between switch and move ceramic chip and the valve gap can keep UNICOM with the liquid flow way.

Preferably, a first gasket is arranged between the protrusion and the valve cover, the first gasket is sleeved at the lower end of the valve rod, the upper end of the first gasket abuts against the lower end of the valve cover, and the lower end of the first gasket abuts against the upper end of the protrusion.

Through above-mentioned technical scheme, through a gasket contact between arch and the valve gap, avoid the valve rod to drive when opening and shutting the ceramic chip and rotate, produce great wearing and tearing between arch and the valve gap.

Preferably, a second gasket is arranged between the protrusion and the opening and closing movable ceramic sheet, the second gasket is sleeved at the lower end of the valve rod, the upper end of the second gasket abuts against the protrusion, and the lower end of the second gasket abuts against the upper end of the opening and closing movable ceramic sheet.

Through the technical scheme, the protrusion is in contact with the switch moving ceramic chip through the second gasket, the protrusion is prevented from being in direct contact with the valve cover, and the service life of the valve rod is guaranteed.

Preferably, the fastener includes the pressure cap, press the cap cover to locate the valve gap outside, just press the cap with the installation cavity can be dismantled and be connected, make press the cap to valve gap axial fixity.

Through above-mentioned technical scheme, press the cap cover to locate the valve gap outside, and press the cap to be connected with the installation cavity for press the cap with valve gap axial fixity.

Preferably, the liquid flow channel comprises a water inlet flow channel and a water outlet flow channel, a bottom cover is arranged at the bottom of the valve body, a rubber pad is arranged between the bottom cover and the valve body, a balance cavity is formed between the rubber pad and the bottom cover, and the balance cavity is communicated with the water outlet flow channel through the balance flow channel.

Through the technical scheme, liquid enters the valve body from the water inlet flow channel, the liquid enters the water outlet flow channel after passing through the switch static ceramic pieces and the switch dynamic ceramic pieces, and under the action of pressure difference, the liquid can enter the balance cavity from the balance flow channel, so that the volume of the balance cavity is changed, and the pressure balance in the water inlet flow channel and the water outlet flow channel is kept.

To sum up, the utility model discloses the beneficial effect who contrasts in prior art does:

1. the switch static ceramic sheet and the valve cover are circumferentially fixed in the mounting cavity through the matching of the first limiting part and the second limiting part with the positioning part, so that the balance valve is convenient to assemble and disassemble;

2. the pressure in the water inlet flow channel and the water outlet flow channel can be effectively balanced;

3. novel structure, convenient to use.

Drawings

FIG. 1 is a schematic diagram of an exploded structure of an embodiment, mainly used for showing the components of the embodiment;

FIG. 2 is an exploded view of the switch static ceramic plate, the switch moving ceramic plate, the valve rod and the valve cover in the embodiment;

FIG. 3 is a schematic full-sectional view of the valve body in the embodiment;

FIG. 4 is a schematic diagram of the embodiment in full section, mainly used to show the internal structure of the embodiment;

FIG. 5 is a schematic diagram of the embodiment in full section, mainly used to show the structure of the balance cavity;

fig. 6 is an assembly diagram of the embodiment, which is mainly used for showing the external structure of the embodiment.

Reference numerals: 100. a valve body; 110. a movable cavity; 111. a core bar; 120. a balance flow channel; 200. a mounting cavity; 210. switching the static ceramic sheet; 211. a first limiting part; 2111. a first limiting block; 212. a first through hole; 220. opening and closing the movable ceramic sheet; 221. a second through hole; 222. connecting holes; 230. a valve stem; 231. a partition portion; 232. a protrusion; 233. a first gasket; 234. a second gasket; 240. a valve cover; 241. a second limiting part; 2411. a second limiting block; 242. a shoulder III; 250. a positioning part; 260. a first blocking shoulder; 261. positioning a first groove; 270. a second shoulder; 271. positioning a second groove; 280. a sealing groove; 281. a seal ring; 300. a liquid flow passage; 310. a water inlet flow channel; 320. a water outlet flow channel; 400. a fastener; 410. pressing the cap; 500. a balancing chamber; 600. a bottom cover; 700. a rubber pad; 800. a return spring; 900. and (4) bolts.

Detailed Description

In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed in a specific orientation, and be operated, and thus should not be construed as limiting the present invention.

The present invention will be described in further detail with reference to the accompanying drawings.

A dynamic balance valve is shown in figures 1 to 6 and comprises a valve body 100, a switch movable ceramic sheet 220, a switch static ceramic sheet 210, a valve rod 230 and a valve cover 240, wherein a liquid flow channel 300 is arranged in the valve body 100, an installation cavity 200 communicated with the liquid flow channel 300 is arranged on the outer side of the valve body 100, a positioning part 250 is arranged in the installation cavity 200, a first limiting part 211 is arranged on the outer side of the switch static ceramic sheet 210, the first limiting part 211 slides in the positioning part 250 along the vertical direction so as to circumferentially fix the switch static ceramic sheet 210 in the installation cavity 200, the switch movable ceramic sheet 220 is arranged on the upper end face of the switch static ceramic sheet 210, and the switch static ceramic sheet 210 and the switch movable ceramic sheet 220 are communicated with; the outer side of the valve cover 240 is provided with a second limiting portion 241, the second limiting portion 241 slides in the positioning portion 250 along the vertical direction, so that the valve cover 240 is circumferentially fixed in the installation cavity 200, the valve cover 240 is located above the opening and closing movable ceramic piece 220, the valve cover 240 is circumferentially fixed in the installation cavity 200 through a fastener 400, preferably, the fastener 400 comprises a pressing cap 410, the pressing cap 410 is sleeved on the outer side of the valve cover 240, and the pressing cap 410 is in threaded connection with the installation cavity 200, so that the pressing cap 410 axially limits the valve cover 240. The valve rod 230 penetrates through the valve cover 240 and is circumferentially fixed with the opening and closing movable ceramic piece 220, the lower end of the valve rod 230 is provided with a partition 231 for separating the valve cover 240 from the opening and closing movable ceramic piece 220, and the valve rod 230 can control the opening and closing movable ceramic piece 220 to rotate, so that the opening and closing movable ceramic piece 220 is communicated with or separated from the liquid flow passage 300.

As shown in fig. 3 to 5, the liquid flow passage 300 includes a water inlet flow passage 310 and a water outlet flow passage 320, a movable cavity 110 communicated with the water inlet flow passage 310 is disposed in the valve body 100, a core rod 111 is slidably disposed in the movable cavity 110, a bottom cover 600 is disposed at the bottom of the valve body 100, and a rubber gasket 700 is disposed between the bottom cover 600 and the valve body 100. A space between the bottom cover 600 and the rubber pad 700 is a balance cavity 500, the balance cavity 500 is communicated with the water outlet flow channel 320 through the balance flow channel 120, the rubber pad 700 is penetrated through by the lower end of the core rod 111, the core rod 111 is fixed with the rubber pad 700 through a bolt 900, a return spring 800 is arranged between the rubber pad 700 and the bottom cover 600, and the return spring 800 is used for applying elastic acting force to the rubber pad 700 so that the core rod 111 is positioned in the movable cavity 110, thereby keeping the volume of the balance cavity 500; the pressure difference between the water inlet channel 310 and the water outlet channel 320 can drive the core rod 111 to slide in the movable cavity 110, and the volume of the balance cavity 500 changes along with the movement of the core rod 111, so that the pressures in the water inlet channel 310 and the water outlet channel 320 are balanced.

The first retaining shoulder 260 and the second retaining shoulder 270 are arranged in the installation cavity 200 in parallel, the first retaining shoulder 260 is provided with a first positioning groove 261, the second retaining shoulder 270 is provided with a second positioning groove 271, the first positioning groove 261 and the second positioning groove 271 are coaxially arranged, preferably, at least two positioning grooves 261 and two positioning grooves 271 are arranged and are respectively and symmetrically distributed on the first retaining shoulder 260 and the second retaining shoulder 270, and preferably, the positioning portion 250 comprises the first positioning groove 261 and the second positioning groove 271; the first limiting part 211 comprises a first limiting block 2111 arranged on the outer side of the switch static ceramic tile 210, and the first limiting block 2111 can slide in the first positioning groove 261; the second limiting portion 241 includes a second limiting block 2411 disposed outside the valve cover 240, and the second limiting block 2411 can slide in the second positioning groove 271.

As another scheme, the positioning portion 250 may be a positioning groove directly formed in the inner wall of the mounting cavity 200, the first limiting portion 211 is a first positioning block integrally formed on the outer side of the first switch static ceramic sheet 210, and the first switch static ceramic sheet 210 is loaded into the mounting cavity 200 from the opening of the mounting cavity 200, so that the first positioning block slides downwards along the positioning groove into the lower end of the positioning groove; the second limiting portion 241 is a second positioning block integrally formed on the outer side of the valve cover 240, and the valve cover 240 is installed into the installation cavity 200 from the opening of the installation cavity 200, so that the second positioning block extends into and slides in the positioning groove. Or, the positioning portion 250 may also be a guide post disposed in the mounting cavity 200, the first limiting portion 211 is a first groove formed on a side edge of the switch static ceramic tile 210, and the first groove is matched with the guide post so as to circumferentially fix the switch static ceramic tile 210 in the mounting cavity 200; the second limiting portion 241 is a second groove formed in the side edge of the valve cover 240, and the second groove is matched with the guide columns to circumferentially fix the valve cover 240 in the installation cavity 200.

Preferably, the first blocking shoulder 260 is located below the second blocking shoulder 270, a sealing groove 280 is formed between the first blocking shoulder 260 and the bottom of the installation cavity 200, a sealing ring 281 is arranged in the sealing groove 280, and the upper end of the sealing ring 281 is abutted to the upper end of the switch static ceramic tile 210. The side edge of the valve cover 240 is provided with a third blocking shoulder 242, the third blocking shoulder 242 is positioned above the second limiting block 2411, and the lower end of the third blocking shoulder 242 abuts against the upper end of the second blocking shoulder 270.

The first through hole 212 communicated with the liquid flow channel 300 is formed in the switch static ceramic piece 210, the second through hole 221 communicated with the first through hole 212 is formed in the switch movable ceramic piece 220, a connecting hole 222 for inserting the lower end of the valve rod 230 is formed in the center of gravity of the switch movable ceramic piece 220, and the connecting hole 222 can be used for fixing the lower end of the valve rod 230 in the circumferential direction.

The partition 231 includes a protrusion 232 provided at a lower end of the valve stem 230. Preferably, a first gasket 233 is disposed between the protrusion 232 and the valve cover 240, the first gasket 233 is sleeved on the lower end of the valve rod 230, the upper end of the first gasket 233 abuts against the lower end of the valve cover 240, and the lower end of the first gasket 233 abuts against the upper end of the protrusion 232. Preferably, a second spacer 234 is disposed between the protrusion 232 and the movable switch tile 220, the second spacer 234 is sleeved on the lower end of the valve rod 230, the upper end of the second spacer 234 abuts against the protrusion 232, and the lower end of the second spacer 234 abuts against the upper end of the movable switch tile 220.

The working principle of the dynamic balance valve is as follows:

the assembly of this balanced valve: the balance chamber 500 is assembled at the lower end of the valve body 100, so that the water outlet channel 320 is communicated with the balance chamber 500; a sealing ring 281 is arranged at the bottom of the installation cavity 200, and the sealing ring 281 is axially fixed in the sealing groove 280; the switch static ceramic tile 210 is arranged in the installation cavity 200, so that the first limiting block 2111 is positioned in the first positioning groove 261, the first through hole 212 is communicated with the water inlet flow channel 310, and the lower end of the switch static ceramic tile 210 abuts against the upper end of the sealing ring 281; placing the switch movable ceramic sheet 220 on the upper end surface of the switch static ceramic sheet 210, wherein the second through hole 221 is communicated with the first through hole 212; sleeving a first gasket 233 on the valve rod 230 from the upper end of the valve rod 230, sleeving a second gasket 234 on the valve rod 230 from the lower end of the valve rod 230, so that the lower end of the first gasket 233 abuts against the upper end of the protrusion 232, the upper end of the second gasket 234 abuts against the lower end of the protrusion 232, and then inserting the lower end of the valve rod 230 into the connecting hole 222, so that the lower end face of the second gasket 234 abuts against the upper end face of the opening and closing movable ceramic piece 220; the valve cover 240 is installed in the installation cavity 200, the lower end of the third shoulder 242 abuts against the upper end of the second shoulder 270, the valve rod 230 penetrates through the valve cover 240, and the upper end of the valve cover 240 protrudes out of the upper end of the valve cover 240, so that the upper end face of the first gasket 233 abuts against the lower end of the valve cover 240; and then the pressing cap 410 is sleeved on the outer side of the valve cover 240, and the outer end of the pressing cap 410 is in threaded connection with the upper end of the inner wall of the installation cavity 200, so that the balance valve is assembled.

Set up location portion 250 in the installation cavity 200, slide in location portion 250 through spacing one 211, alright realize that the circumference of switching ceramic chip 220 is fixed, valve rod 230 pegs graft in valve gap 240, and spacing two 241 slide in location portion 250, alright realize that the circumference of valve gap 240 is fixed with valve rod 230 axial fixity, partition 231 separates valve gap 240 and switching ceramic chip 220, again through the fastening with valve gap 240 axial fixity in installation cavity 200, the part installation in installation cavity 200 is accomplished, compare in prior art, the quiet ceramic chip of switch 210 in this balanced valve is fixed in the mode of installation cavity 200 with valve gap 240, can effectively improve the packaging efficiency of balanced valve, it is more convenient to load and unload.

The above description is only an exemplary embodiment of the present invention, and is not intended to limit the scope of the present invention, which is defined by the appended claims.

Claims

1. A dynamically balanced valve, characterized by: the valve comprises a valve body (100), a switch movable ceramic sheet (220), a switch static ceramic sheet (210), a valve rod (230) and a valve cover (240), wherein a liquid flow channel (300) is arranged in the valve body (100), an installation cavity (200) communicated with the liquid flow channel (300) is formed in the outer side of the valve body (100), a positioning part (250) is arranged in the installation cavity (200), a first limiting part (211) is arranged on the outer side of the switch static ceramic sheet (210), the first limiting part (211) slides in the positioning part (250) along the vertical direction so as to circumferentially fix the switch static ceramic sheet (210) in the installation cavity (200), the switch movable ceramic sheet (220) is arranged on the upper end surface of the switch static ceramic sheet (210), and the switch movable ceramic sheet (210) and the switch movable ceramic sheet (220) are both communicated with the liquid flow channel (300); the outer side of the valve cover (240) is provided with a second limiting part (241), the second limiting part (241) slides in the positioning part (250) along the vertical direction so as to circumferentially fix the valve cover (240) in the installation cavity (200), the valve cover (240) is positioned above the opening and closing movable ceramic piece (220), the valve cover (240) is circumferentially fixed in the installation cavity (200) through a fastener (400), the valve rod (230) penetrates through the valve cover (240) and is circumferentially fixed with the opening and closing movable ceramic piece (220), the lower end of the valve rod (230) is provided with a partition part (231) which separates the valve cover (240) from the opening and closing movable ceramic piece (220), and the valve rod (230) can control the opening and closing movable ceramic piece (220) to rotate, so that the opening and closing movable ceramic piece (220) communicates or separates the liquid flow passage (300).

2. A dynamic balancing valve according to claim 1, characterized in that: a first blocking shoulder (260) and a second blocking shoulder (270) are arranged in the installation cavity (200) in parallel, a first positioning groove (261) is formed in the first blocking shoulder (260), a second positioning groove (271) is formed in the second blocking shoulder (270), the first positioning groove (261) and the second positioning groove (271) are coaxially arranged, and the positioning portion (250) comprises the first positioning groove (261) and the second positioning groove (271); the first limiting part (211) comprises a first limiting block (2111) arranged on the outer side of the switch static ceramic chip (210), and the first limiting block (2111) slides in the first positioning groove (261); the second limiting part (241) comprises a second limiting block (2411) arranged on the outer side of the valve cover (240), and the second limiting block (2411) slides in the second positioning groove (271).

3. A dynamic balancing valve according to claim 2, characterized in that: keep off shoulder one (260) and be located keep off shoulder two (270) below, just keep off shoulder one (260) with be formed with seal groove (280) between installation cavity (200) bottom, be provided with sealing washer (281) in seal groove (280), the upper end of sealing washer (281) with the upper end of the quiet porcelain piece of switch (210) is leaned on mutually.

4. A dynamic balancing valve according to claim 2, characterized in that: a third blocking shoulder (242) is arranged on the side edge of the valve cover (240), the third blocking shoulder (242) is positioned above the second limiting block (2411), and the lower end of the third blocking shoulder (242) abuts against the upper end of the second blocking shoulder (270).

5. A dynamic balancing valve according to claim 2, characterized in that: the switch static ceramic chip (210) is provided with a first through hole (212) communicated with the liquid flow channel (300), the switch movable ceramic chip (220) is provided with a second through hole (221) communicated with the first through hole (212), and the center of gravity of the switch movable ceramic chip (220) is provided with a connecting hole (222) for the lower end of the valve rod (230) to be inserted.

6. A dynamic balancing valve according to claim 1, characterized in that: the partition (231) includes a protrusion (232) provided at a lower end of the valve stem (230).

7. A dynamic balancing valve according to claim 6, characterized in that: a first gasket (233) is arranged between the bulge (232) and the valve cover (240), the first gasket (233) is sleeved at the lower end of the valve rod (230), the upper end of the first gasket (233) abuts against the lower end of the valve cover (240), and the lower end of the first gasket (233) abuts against the upper end of the bulge (232).

8. A dynamic balancing valve according to claim 6, characterized in that: a second gasket (234) is arranged between the protrusion (232) and the movable switch ceramic piece (220), the second gasket (234) is sleeved at the lower end of the valve rod (230), the upper end of the second gasket (234) is tightly abutted to the protrusion (232), and the lower end of the second gasket (234) is tightly abutted to the upper end of the movable switch ceramic piece (220).

9. A dynamic balancing valve according to claim 1, characterized in that: the fastener (400) comprises a pressing cap (410), the pressing cap (410) is sleeved on the outer side of the valve cover (240), and the pressing cap (410) is detachably connected with the mounting cavity (200), so that the pressing cap (410) is axially fixed to the valve cover (240).

10. A dynamic balancing valve according to claim 1, characterized in that: liquid runner (300) are including inhalant canal (310) and exhalant canal (320), the bottom of valve body (100) is provided with bottom (600), bottom (600) with be provided with rubber pad (700) between valve body (100), rubber pad (700) with be formed with balanced chamber (500) between bottom (600), balanced chamber (500) through balanced runner (120) UNICOM in exhalant canal (320).