CN117759729A - Fluid valve and fluid diverter valve - Google Patents

Abstract

The invention discloses a fluid valve and a fluid diverter valve, which comprises a valve body and a valve rod, wherein the valve body is provided with a fluid inlet, a fluid outlet and a valve rod reciprocating motion channel, the valve rod is positioned in the valve rod reciprocating motion channel and controls the opening or closing of the fluid valve, when the fluid valve is opened, fluid flows from the fluid inlet to the fluid outlet and flows out of the fluid valve, the fluid diverter valve also comprises a Guan Fadong force automatic compensation channel, and the fluid inlet end of the Guan Fadong force automatic compensation channel is communicated with fluid in the valve body; after the fluid valve is opened: the fluid in the valve body applies a force towards the valve closing movement direction of the valve rod after flowing from the fluid inlet end of the Guan Fadong force automatic compensation channel to the fluid outlet end of the Guan Fadong force automatic compensation channel under the pressure of the fluid; after the fluid valve is closed: guan Fadong force automatically compensates for the reduced fluid pressure at the fluid outlet end of the passageway. The fluid valve can reduce the external driving force required during valve closing, and realizes easy valve opening and valve closing.

Description

Fluid valve and fluid diverter valve

Technical Field

The invention relates to the technical field of fluid inlet and outlet control. In particular to a fluid valve and a fluid diverter valve.

Background

In the prior art, fluid valves are controlled to open or close by valve stem movement; however, when the fluid pressure is high, the plug of the valve rod is acted by the fluid pressure, so that the valve rod moves towards the valve closing direction, and a large driving force is required; for a fluid valve using a cylinder or a hydraulic cylinder to provide valve closing power, a cylinder or a hydraulic cylinder with a larger diameter is required to provide corresponding valve closing driving force under the condition of the same gas or liquid pressure, and the increase of the diameter of the cylinder or the hydraulic cylinder causes the overall volume of the fluid valve to be suddenly increased, so that the fluid valve is difficult to install and use in a narrow space, and the overall cost of the fluid valve is greatly increased.

For example, with the increasing demand of people for environmental cleaning, the pressure of cleaning water sprayed from sanitation vehicles rises from several megapascals to more than thirty megapascals to realize deep cleaning of the road surface; the opening and closing of the water valve are realized through the air cylinder, the driving force required by closing the water valve is greatly increased along with the great increase of the water pressure, the water valve is required to be met by increasing the air source pressure or increasing the diameter of the air cylinder, the whole manufacturing cost of the sanitation vehicle can be increased by increasing the air source pressure, the sanitation vehicle can be used only by reforming and upgrading the existing sanitation vehicle, and the air cylinder diameter can be increased to cause the incapability of being used in the limited installation space of the sanitation vehicle.

Disclosure of Invention

Therefore, the technical problem to be solved by the invention is to provide a fluid valve and a fluid diverter valve which can reduce the external driving force required during valve closing.

In order to solve the technical problems, the invention provides the following technical scheme:

a fluid valve comprising a valve body and a valve stem, wherein the valve body is provided with a fluid inlet, a fluid outlet and a valve stem reciprocating motion channel, the valve stem is positioned in the valve stem reciprocating motion channel and controls the opening or closing of the fluid valve, and when the fluid valve is opened, fluid flows from the fluid inlet to the fluid outlet and flows out of the fluid valve, and the fluid valve is characterized by further comprising a Guan Fadong force automatic compensation channel, and the fluid inlet end of the Guan Fadong force automatic compensation channel is in fluid communication with fluid in the valve body; after the fluid valve is opened: the fluid in the valve body applies a force towards the valve closing movement direction of the valve rod after flowing from the fluid inlet end of the Guan Fadong force automatic compensation channel to the fluid outlet end of the Guan Fadong force automatic compensation channel under the pressure of the fluid; after the fluid valve is closed: the Guan Fadong force automatically compensates for the reduced fluid pressure at the fluid outlet end of the passageway.

In the above fluid valve, the fluid outlet end of the Guan Fadong force automatic compensating channel is in fluid communication with the Guan Fadong force compensating surface on the valve rod, and the fluid flowing out of the fluid outlet end of the Guan Fadong force automatic compensating channel applies a force to the valve rod towards the valve closing movement direction of the valve rod through the Guan Fadong force compensating surface.

The two ends of the valve rod are respectively provided with a valve closing end and a Guan Fadong force compensation end, and the valve rod reciprocates in the valve rod reciprocating motion channel so that the valve closing end opens or closes the fluid inlet, the fluid outlet or the fluid channel between the fluid inlet and the fluid outlet; the Guan Fadong force compensation surface is as follows: the end face of the Guan Fadong force compensation end, or the concave face on the end face of the Guan Fadong force compensation end, or the convex face on the end face of the Guan Fadong force compensation end, or the combination of any two or three of the end face of the Guan Fadong force compensation end, the concave face on the end face of the Guan Fadong force compensation end, and the convex face on the end face of the Guan Fadong force compensation end.

In the above fluid valve, the Guan Fadong force compensating surface is a plane perpendicular to the movement direction of the valve stem.

In the above fluid valve, a compression spring is installed between the Guan Fadong force compensation end and the valve body, and the elastic force of the compression spring to the Guan Fadong force compensation end faces to the valve closing movement direction of the valve rod.

A fluid valve having a fluid-proof reservoir mounted between the compression spring and the Guan Fadong force-compensating surface, the fluid outlet between the fluid-proof reservoir and the Guan Fadong force-compensating surface being the Guan Fadong force-compensating passage; after the fluid valve is closed, the spring force of the compression spring drives the fluid-resistant reservoir member against the Guan Fadong force compensating surface such that fluid between the fluid-resistant reservoir member and the Guan Fadong force compensating surface is expelled from the Guan Fadong force automatic compensating passage.

The end face of the Guan Fadong force compensation end of the fluid valve is provided with a power compensation blind hole, the first end of the fluid-proof accumulation component is positioned in the power compensation blind hole, the first end of the fluid-proof accumulation component is in liquid seal with the inner wall of the power compensation blind hole, and the bottom of the power compensation blind hole is the Guan Fadong force compensation surface; the compression spring is located between the second end of the fluid-resistant reservoir member and the valve body.

The fluid valve is characterized in that a drainage blind hole is formed in the end face of the second end of the fluid-proof accumulation component, and one end, adjacent to the fluid-proof accumulation component, of the compression spring is positioned in the drainage blind hole; and a diversion hole is formed in the hole wall of the drainage blind hole, and fluid is conducted between the annular space between the fluid accumulation prevention component and the valve rod reciprocating motion channel and the drainage blind hole through the diversion hole.

The fluid valve is closed: the Guan Fadong force automatically compensates for a fluid passage disconnection between a fluid inlet end of the passage and the fluid within the valve body.

In the above fluid valve, the Guan Fadong force automatic compensation channel is a through hole formed in the valve rod from the valve closing end to the Guan Fadong force compensation end.

The fluid valve is characterized in that a leakage-proof pressure compensation surface is arranged on the Guan Fafeng blocking end, and the pressure of the fluid in the valve body applied to the leakage-proof pressure compensation surface faces to the valve closing movement direction of the valve rod.

According to the fluid valve, the independent one-way valve seat is arranged in the valve body, the valve closing end is tightly pressed on the one-way valve seat to close the fluid valve, an anti-impact part is arranged between the one-way valve seat and the valve body, and the anti-impact part tightly presses the one-way valve seat towards the valve closing movement direction of the valve rod.

The fluid valve described above, the valve stem shuttle passageway comprising a Guan Fadong force compensating chamber, a Guan Fadong force chamber and a fluid flow chamber, the Guan Fadong force chamber being located between the Guan Fadong force compensating chamber and the fluid flow chamber, and the Guan Fadong force chamber and the Guan Fadong force compensating chamber and the Guan Fadong force chamber being sealed from fluid flow; the valve stem extends through the Guan Fadong force chamber and has one end extending into the fluid flow chamber and the other end extending into the Guan Fadong force compensating chamber; the fluid inlet is in fluid communication with the fluid outlet through the fluid flow chamber; the Guan Fadong force chamber comprises a first Guan Fadong force chamber and a second Guan Fadong force chamber, the first Guan Fadong force chamber and the second Guan Fadong force chamber being fluidly sealed therebetween by a drive piston fixedly mounted on the valve stem; the valve rod is driven to synchronously move by driving the driving piston through filling fluid into the first Guan Fadong force chamber or the second Guan Fadong force chamber so as to open or close the fluid valve.

The fluid valve is characterized in that a first sealing seat is arranged between the Guan Fadong force chamber and the fluid flow chamber, the outer peripheral surface of the first sealing seat is in liquid sealing with the inner wall of the valve rod reciprocating motion channel, the valve rod passes through a middle hole in the first sealing seat, and the outer peripheral surface of the valve rod is in liquid sealing with the inner wall of the middle hole in the first sealing seat; a first annular groove is formed in the outer peripheral surface of the first sealing seat, a first radial flow guide hole is formed in the first sealing seat, one end of the first radial flow guide hole is in fluid communication with a gap between the valve rod and the inner wall of a middle hole on the first sealing seat, one end of the first radial flow guide hole is in fluid communication with the first annular groove, a first liquid discharge hole in fluid communication with the first annular groove is formed in the valve body, and a muffler is arranged in the first liquid discharge hole; along the axial direction of the valve rod: at least one static sealing structure is arranged between the outer peripheral surfaces of the first sealing seats at the two sides of the first annular groove and the inner wall of the valve rod reciprocating motion channel, and at least one dynamic sealing structure is arranged between the outer peripheral surfaces of the valve rods, which are opposite to the two sides of the valve rod, of the first radial diversion holes and the inner wall of the middle hole on the first sealing seat.

The fluid valve is characterized in that a second sealing seat is arranged between the Guan Fadong force compensation chamber and the Guan Fadong force chamber, the outer peripheral surface of the second sealing seat is in liquid sealing with the inner wall of the valve rod reciprocating motion channel, the valve rod passes through a middle hole in the second sealing seat, and the outer peripheral surface of the valve rod is in liquid sealing with the inner wall of the middle hole in the second sealing seat; a second annular groove is formed in the outer peripheral surface of the second sealing seat, a second radial flow guide hole is formed in the second sealing seat, one end of the second radial flow guide hole is in fluid communication with a gap between the valve rod and the inner wall of the middle hole on the second sealing seat, one end of the second radial flow guide hole is in fluid communication with the second annular groove, a second liquid discharge hole in fluid communication with the second annular groove is formed in the valve body, and a muffler is arranged in the second liquid discharge hole; along the axial direction of the valve rod: at least one static sealing structure is arranged between the outer peripheral surfaces of the second sealing seats at the two sides of the second annular groove and the inner wall of the valve rod reciprocating motion channel, and at least one dynamic sealing structure is arranged between the outer peripheral surfaces of the valve rods, which are opposite to the two sides of the valve rod, of the second radial diversion holes and the inner wall of the middle hole on the second sealing seat.

A fluid diverter valve comprising two or more of the above fluid valves, between adjacent two of the fluid valves: the upstream fluid valve is in fluid communication with the downstream fluid inlet of the fluid valve through a normally open fluid passage formed in the valve body.

The technical scheme of the invention has the following beneficial technical effects:

1. the fluid valve of the invention can reduce the external driving force required during valve closing, and is easy to close and open.

2. The Guan Fadong force compensation surface is arranged on the valve rod, so that the acting force applied to the valve rod in the valve closing movement direction of the valve rod can be accurately calculated, and the mode of applying the acting force to the valve rod in the valve closing movement direction by the fluid flowing out of the fluid outlet end of the valve closing force automatic compensation channel is realized in the simplest and easy way, so that the valve body is simple in structure, easy to process and produce and low in cost.

3. The Guan Fadong force compensation surface is arranged at the Guan Fadong force compensation end, so that the acting force towards the valve closing movement direction of the valve rod can be applied to the valve rod more easily, and the fluid passage is simpler; the dispute of only limiting the drilled hole on the end surface and judging whether the infringement is equivalent is avoided.

4. The Guan Fadong force compensation surface is a plane perpendicular to the movement direction of the valve rod, so that the force applied to the valve rod towards the valve closing movement direction of the valve rod can be accurately calculated.

5. One end of the Guan Fadong force automatic compensation channel is positioned on the end face of the valve closing end, and the valve closing can automatically close the valve closing power automatic compensation channel, so that the cutting-off mode is easy to realize, the valve body is simple in structure, easy to process and produce and low in cost.

The valve rod is provided with the through hole as a Guan Fadong force automatic compensation channel, so that fluid in the valve closing force automatic compensation channel is easier to flow out and is not accumulated in the Guan Fadong force compensation channel after the fluid valve is closed, on the other hand, the on-off of the valve closing force automatic compensation channel is easier to control, and the valve body is simple in structure, easy to process and produce and low in cost.

6. The design of leak protection pressure compensation face is in order to prevent the export and leak liquid because of the water pressure is great, and the anti-shock part can prevent that the water pressure is too high and drops when the check valve seat opens the valve.

Drawings

FIG. 1 is a schematic view of the internal structure of a first fluid valve of the present invention;

FIG. 2 is a schematic illustration of the valve stem mounting structure of the fluid valve of the present invention shown in FIG. 1;

FIG. 3 is a schematic view of the internal structure of a second fluid valve of the present invention;

FIG. 4 is a schematic view of the internal structure of a third fluid valve according to the present invention;

FIG. 5 is a schematic view of the external structure of the fluid diverter valve of the present invention.

The reference numerals in the drawings are as follows:

1-a valve body; 1-1-body; 1-3-valve stem mount; 1-4-a first drain hole; 1-5-second drain holes;

2-a valve stem; 2-1-closing the valve blocking end; 2-2-Guan Fadong force compensating ends; 2-3-leak-proof pressure compensation surfaces; 2-4-power compensation blind holes;

3-driving a piston;

4-valve stem reciprocation channel; 4-1-Guan Fadong force compensation chambers; 4-2-Guan Fadong force chambers; 4-21-first Guan Fadong force chambers; 4-22-second Guan Fadong force chambers; 4-3-fluid flow chamber;

5-Guan Fadong force auto-compensating channel;

6-fluid inlet; 7-a fluid outlet; 8-Guan Fadong force compensation surfaces; 9-compressing the spring; 10-a fluid reservoir prevention member; 10-1-blind drain holes; 11-deflector holes; 12-an annular space; 13-an impact protection member; 13-1-flow holes; 14-a normally open fluid passage;

15-a first seal seat; 15-1-a first annular groove; 15-2-a first radial flow bore; 15-3-annular fluid storage tank;

16-muffler; 17-static seal structure; 18-a dynamic seal structure;

19-a second seal seat; 19-1-a second annular groove; 19-2-a second radial flow bore; 19-3-annular fluid storage tanks;

20-opening and closing a power fluid inlet and a power fluid outlet by a valve; 21-a one-way valve seat; 21-1-plugging the hole.

Detailed Description

As shown in fig. 1, the fluid valve of the present embodiment includes a valve body 1 and a valve stem 2, the valve body 1 has a fluid inlet 6, a fluid outlet 7 and a valve stem reciprocating channel 4, the valve stem 2 is located in the valve stem reciprocating channel 4 and controls the opening or closing of the fluid valve, and when the fluid valve is opened, fluid flows from the fluid inlet 6 to the fluid outlet 7 and flows out of the fluid valve. The valve body 1 in the embodiment comprises a body 1-1 and a valve rod mounting body 1-3 which are fixedly mounted together, wherein the body 1-1 and the valve rod mounting body 1-3 are integrally formed, and a valve rod reciprocating motion channel 4 is formed by an inner cavity of the body 1-1 and an inner cavity of the valve rod mounting body 1-3.

As shown in fig. 1 and 2, the valve stem reciprocation channel 4 includes a valve closing force compensation chamber 4-1, a valve closing force chamber 4-2, and a fluid flow chamber 4-3, the Guan Fadong force chamber 4-2 being located between the Guan Fadong force compensation chamber 4-1 and the fluid flow chamber 4-3, and fluid seals being present between the Guan Fadong force chamber 4-2 and the Guan Fadong force compensation chamber 4-1 and between the Guan Fadong force chamber 4-2 and the fluid flow chamber 4-3; the valve rod 2 penetrates through the Guan Fadong force chamber 4-2, one end of the valve rod 2 extends into the fluid flow chamber 4-3, and the other end extends into the Guan Fadong force compensation chamber 4-1; the fluid inlet 6 is in fluid communication with the fluid outlet 7 through the fluid flow chamber 4-3; the Guan Fadong force chamber 4-2 comprises a first Guan Fadong force chamber 4-21 and a second Guan Fadong force chamber 4-22, the first Guan Fadong force chamber 4-21 and the second Guan Fadong force chamber 4-22 being fluidly sealed by a drive piston 3 fixedly mounted on the valve stem 2; the driving piston 3 is driven to drive the valve rod 2 to synchronously move by filling fluid into the first Guan Fadong force chamber 4-21 or the second Guan Fadong force chamber 4-22 so as to open or close the fluid valve, and the liquid seal between the outer peripheral surface of the driving piston 3 and the Guan Fadong force chamber 4-2 is realized by installing a dynamic seal structure on the outer peripheral surface of the driving piston 3.

As shown in fig. 1, a first sealing seat 15 is installed between the Guan Fadong force chamber 4-2 and the fluid flow chamber 4-3, the outer circumferential surface of the first sealing seat 15 is in fluid sealing with the inner wall of the valve rod reciprocating channel 4, the valve rod 2 passes through a middle hole on the first sealing seat 15, and the outer circumferential surface of the valve rod 2 is in fluid sealing with the inner wall of the middle hole on the first sealing seat 15; a first annular groove 15-1 is formed in the outer peripheral surface of the first sealing seat 15, a first radial flow guiding hole 15-2 is formed in the first sealing seat 15, one end of the first radial flow guiding hole 15-2 is in fluid communication with a gap between the valve rod 2 and the inner wall of a middle hole on the first sealing seat 15 [ in the embodiment, an annular fluid storage groove 15-3 is formed in the wall of the middle hole of the first sealing seat 15, the annular fluid storage groove 15-3 is opposite to one end, adjacent to the valve rod 2, of the first radial flow guiding hole 15-2, and is communicated with the first annular groove 15-1 ], one end of the first radial flow guiding hole 15-2 is in fluid communication with the first annular groove 15-1, a first liquid draining hole 1-4 is formed in the valve body 1, and a muffler 16 is arranged in the first liquid draining hole 1-4; along the axial direction of the valve rod 2: at least one static sealing structure 17 is respectively arranged between the outer peripheral surfaces of the first sealing seats 15 on the two sides of the first annular groove 15-1 and the inner wall of the valve rod reciprocating motion channel 4, and at least one dynamic sealing structure 18 is respectively arranged between the outer peripheral surfaces of the valve rods 2, which are opposite to the two sides of the positions of the valve rods 2, of the first radial flow guide holes 15-2 and the inner wall of the middle hole on the first sealing seat 15.

As shown in fig. 1, two ends of the valve rod 2 in this embodiment are respectively a valve closing end 2-1 and a force compensating end 2-2 of Guan Fadong, an independent one-way valve seat 21 is installed in the valve body 1, and the valve closing end 2-1 closes the fluid valve by pressing on the one-way valve seat 21. The Guan Fadong force compensation end 2-2 is in liquid-tight connection with the inner wall of the valve rod reciprocating motion channel 4; the valve stem 2 reciprocates within the valve stem reciprocation channel 4 such that the valve closing end 2-1 opens or closes the fluid outlet 7 [ in other embodiments, it may also be designed that the valve stem 2 reciprocates within the valve stem reciprocation channel 4 such that the valve closing end 2-1 opens or closes the fluid inlet 6 or a fluid passage between the fluid inlet 6 and the fluid outlet 7 ]; an independent one-way valve seat 21 is arranged at the position of the fluid outlet 7, a blocking hole 21-1 which is communicated with the fluid outlet 7 and the fluid flow chamber 4-3 is formed in the one-way valve seat 21, and the valve closing blocking end 2-1 is inserted into the blocking hole 21-1 and is pressed on the one-way valve seat 21 to close the fluid valve.

As shown in fig. 1, the fluid valve of the present embodiment has valve-related power automatic compensation passages 5 and Guan Fadong force compensation surfaces 8: the Guan Fadong force automatic compensation channel 5 is a through hole formed in the valve rod 2 from the valve closing end 2-1 to the Guan Fadong force compensation end 2-2. The Guan Fadong force compensating surface 8 is a concave surface on the end face of the Guan Fadong force compensating end 2-2, and the Guan Fadong force compensating surface 8 is a plane perpendicular to the movement direction of the valve stem 2 [ in other embodiments, the Guan Fadong force compensating end 2-2 may be a convex surface on the end face of the Guan Fadong force compensating end 2-2, or a combination of any two or three of the end face of the Guan Fadong force compensating end 2-2, a concave surface on the end face of the Guan Fadong force compensating end 2-2, and a convex surface on the end face of the Guan Fadong force compensating end 2-2, all achieving the same technical effect ]. The method comprises the following steps: the end face of the Guan Fadong force compensation end 2-2 is provided with a power compensation blind hole 2-4, and the bottom of the power compensation blind hole 2-4 is the Guan Fadong force compensation surface 8. The power compensation blind hole 2-4 is internally provided with the fluid-proof accumulation component 10 with a drainage blind hole 10-1, the outer peripheral surface of the fluid-proof accumulation component 10 is in liquid-tight connection with the inner wall of the power compensation blind hole 2-4, and the outer peripheral surface of one end, far away from the power compensation blind hole 2-4, of the fluid-proof accumulation component 10 is in liquid-tight connection with the inner wall of the valve rod reciprocating channel 4, so that an annular space 12 is formed by the inner wall of the valve rod reciprocating channel 4, the outer peripheral surface of the fluid-proof accumulation component 10 and the end face of the hole wall of the power compensation blind hole 2-4; the opening direction of the drainage blind hole 10-1 is away from the Guan Fadong force compensation surface 8, a compression spring 9 is arranged in the drainage blind hole 10-1, and one end, away from the drainage blind hole 10-1, of the compression spring 9 is arranged on the inner wall of the valve rod mounting body 1-3. A hole wall of the drainage blind hole 10-1 is provided with a diversion hole 11, and an annular space 12 between the fluid accumulation prevention component 10 and the valve rod reciprocating motion channel 4 is in fluid communication with the drainage blind hole 10-1 through the diversion hole 11; the valve rod mounting body 1-3 which is opposite to the opening of the drainage blind hole 10-1 is provided with a drainage hole, and a muffler 16 is arranged on the drainage hole. After the fluid valve is closed, the elastic force of the compression spring 9 drives the fluid-proof accumulating part 10 to approach the Guan Fadong force compensating surface 8 so that the fluid between the fluid-proof accumulating part 10 and the Guan Fadong force compensating surface 8 is discharged from the Guan Fadong force automatic compensating passage 5.

As shown in fig. 1, the valve closing end 2-1 is provided with a leakage-proof pressure compensation surface 2-3, and the pressure exerted on the leakage-proof pressure compensation surface 2-3 by the fluid in the valve body 1 faces the valve closing movement direction of the valve rod 2. As the fluid pressure in the valve body increases, fluid is more likely to leak from the gap between the valve closing end 2-1 and the inner wall of the plugging hole 21-1, even if the fluid pressure suddenly increased in the fluid flow chamber 4-3 can cause the compression spring 9 to fail to keep the valve closing end 2-1 plugged into the plugging hole 21-1, the fluid in the fluid flow chamber 4-3 applies pressure to the valve closing end 2-1 in the valve closing movement direction of the valve rod 2 by arranging the leakage-proof pressure compensation surface 2-3 on the valve closing end 2-1, so that the valve closing end 2-1 can effectively plug the plugging hole 21-1 without fluid leakage; in addition, the compression spring 9 applies pressure to the far end of the valve closing and sealing end 2-1 through the fluid accumulation prevention component 10, and applies pressure to the near end of the valve closing and sealing end 2-1 through the leakage-proof pressure compensation surface 2-3, so that the valve closing and sealing end 2-1 can effectively seal the sealing hole 21-1.

If the valve-closing power automatic compensation passage 5 is not provided on the valve stem 2, it is assumed that the maximum cross section of the fluid-tight portion between the valve-closing plug end 2-1 extending into the plug hole 21-1 and the inner wall of the plug hole 21-1 is S ₁ The valve closing fluid resistance F applied to the valve rod 2 by the fluid in the fluid flow cavity 4-3 borne by the valve rod 2 in the valve opening state enables the valve closing sealing end 2-1 to be far away from the sealing hole 21-1 ₁ ＝PS ₁ P is the fluid pressure, and as the fluid pressure increases, the valve closing fluid resistance F ₁ Increasing. Assuming that the valve rod 2 of the fluid valve of the embodiment is driven by the air cylinder to move to realize valve closing, if the air source pressure is increased under the condition of a certain air source pressure, the whole equipment cost is greatly increased, and the cylinder diameter of the air cylinder is correspondingly increased to overcome the valve closing fluid resistance F ₁ The valve is closed, the whole volume of the fluid valve is increased due to the increase of the diameter of the air cylinder, the installation is difficult, and the existing equipment using the fluid valve is required to be upgraded and modified. For example, for sanitation vehicles in use in actual work, an air source device and a water valve driving cylinder are installed, if deep cleaning is required for the ground and the like, a nozzle is required to spray water with higher pressure, and if the air source device or the water valve driving cylinder is not replaced, the technical problem that the water valve cannot be closed is faced.

The valve closing power automatic compensation channel 5 is arranged on the valve rod 2, so that in the opening state of the fluid valve, fluid in the fluid flow chamber 4-3 can flow to the valve closing pressure compensation surface 8 along the valve closing power automatic compensation channel 5, and valve closing compensation power F towards the valve closing movement direction can be applied to the valve rod 2 ₂ Valve closing compensation power F ₂ With valve-closing fluid resistance F ₁ In the opposite direction by adjusting the area S of the valve-closing pressure compensation surface 8 ₂ To adjust the valve closing compensation power F ₂ So as to partially or completely counteract the valve closing fluid resistance F according to the actual working requirement ₁ Thereby maintaining the air source and valve of the existing in-use equipment such as sanitation vehiclesThe rod driving cylinder or the hydraulic cylinder does not need to be replaced, and meanwhile, the valve rod driving cylinder or the hydraulic cylinder with smaller diameter can be arranged when the fluid valve is manufactured, so that the volume of the fluid valve is greatly reduced. Of course, the fluid valve of the present invention is designed to be suitable for use with high pressure fluid, but is not required to be modified and can be fully suitable for use with low pressure fluid.

In the present embodiment, due to the presence of the valve-closing pressure compensating surface 8, the valve-closing pressure compensating surface 8 is adjusted in area S ₂ The fluid valve of the present invention may be sized such that it is either a normally open valve or a normally closed valve.

For example: for normally closed valves, in the valve-open state, the valve-closing compensating power F is only allowed ₂ The sum of the gravity of the valve rod 2 and the elastic force of the compression spring 9 is larger than the resistance force f of the valve rod 2 moving towards the valve closing movement direction [ the resistance force f comprises the friction force when the valve rod 2 moves and the acting force applied to the valve rod 2 by the fluid in the fluid flow chamber 4-3 and moving away from the valve closing movement direction exerted by the fluid in the fluid flow chamber 4-3 on the valve rod 2 ], at the moment, the valve rod 2 naturally falls until the valve closing end 2-1 enters the sealing hole 2-1 to realize valve closing only by removing the valve opening driving force applied to the valve rod 2 by the driving piston 3. The resistance to be overcome when the normally closed valve is opened is only the gravity of the valve rod 2, the elastic force of the compression spring 9, the friction force when the valve rod 2 moves and the acting force applied to the valve rod 2 by the fluid in the fluid flow chamber 4-3 towards the valve closing direction, and for a cylindrical valve rod with the end of the valve closing end 2-1 being in an inverted conical table shape or a cylindrical shape, the acting force applied to the valve rod 2 by the fluid in the fluid flow chamber 4-3 towards the valve closing direction does not need to be overcome when the normally closed valve is opened, and the valve opening driving force applied to the driving piston 3 is smaller.

For normally open valves, the closing valve is only allowed to compensate the power F ₂ The sum of the gravity of the valve rod 2 and the elastic force of the compression spring 9 is smaller than the resistance force f of the valve rod 2 moving towards the valve closing movement direction, which comprises friction force and the acting force exerted on the valve rod 2 by the fluid in the fluid flow chamber 4-3 on the valve rod 2 towards the direction far away from the valve closing movement direction, so that the fluid valve can be kept in a normally open state. The normally open valve is only needed when closingTo overcome the resistance F' of the motion in the valve closing motion direction and the valve closing compensation power F ₂ The difference of the sum of the gravity of the valve rod 2 and the elastic force of the compression spring 9 is only needed, and the area S of the valve closing pressure compensation surface 8 is adjusted ₂ The magnitude of this difference can be made small, and at this time, the valve stem 2 can be lowered until the valve-closing end 2-1 enters the closing hole 2-1 to be closed, by applying a small valve-closing driving force to the valve stem 2 by driving the piston 3. After the normally open valve is closed, the valve closing compensation power F ₂ The valve-opening driving force applied to the driving piston 3 is equal to the gravity of the valve rod 2, the elastic force of the compression spring 9, the valve-opening friction force and the force applied to the valve rod 2 towards the valve-closing movement direction, and the cylindrical valve rod does not have the force applied to the valve rod 2 towards the valve-closing movement direction, so the valve-opening driving force required for opening the valve is smaller, and the valve-opening is easier.

Although a multi-channel dynamic seal structure is arranged between the valve rod 2 and the first seal seat 15, in order to prevent fluid in the fluid flow chamber 4-3 from entering the valve closing power chamber 4-2 along a fine gap between the outer peripheral surface of the valve rod 2 and the inner wall of a hole in the first seal seat 15, under the condition that the valve closing power chamber 4-2 is driven by a cylinder, the fluid enters the valve closing power chamber 4-2 to finally cause the cylinder to not work normally, even lose driving capability, and particularly when the valve closing power chamber is used for high-pressure fluid, the possibility that the fluid enters the valve closing power chamber 4-2 from the fluid flow chamber 4-3 is higher; because the annular fluid storage groove 15-3, the first radial flow guide hole 15-2 and the first liquid discharge hole 1-4 which are mutually communicated are designed, and the muffler 16 is arranged at the first liquid discharge hole 1-4, the fluid flowing along the fine gap between the outer peripheral surface of the valve rod 2 and the inner wall of the hole in the first sealing seat 15 in the direction of the Guan Fadong force chamber 4-2 can enter the annular fluid storage groove 15-3, and is discharged outside the fluid valve through the first radial flow guide hole 15-2, the first liquid discharge hole 1-4 and the muffler 16 in sequence. In the same way, the fluid flowing along the minute gap between the inner wall of the valve rod reciprocating passage 4 and the first sealing seat 15 toward the Guan Fadong force chamber 4-2 can enter into the first annular groove 15-1 and be discharged outside the fluid valve through the first drain hole 1-4 and the muffler 16 in this order. In addition, the fluid entering between the force compensation surfaces 8 of the fluid-proof accumulating member 10 and Guan Fadong may enter the annular space 12 along the gap between the fluid-proof accumulating member 10 and the inner wall of the power compensation blind hole 2-4, and the fluid in the annular space 12 may be guided into the blind hole 10-1 by opening the guide hole 11 on the wall of the blind hole 10-1, and discharged out of the fluid valve from the guide hole formed in the valve stem mounting body 1-3 facing the opening of the blind hole 10-1 and the muffler 16 mounted on the guide hole.

After the valve is closed, the compression spring 9 pushes the anti-fluid accumulation component 10 to press against the Guan Fadong force compensation surface 8, so that fluid between the anti-fluid accumulation component 10 and the Guan Fadong force compensation surface 8 can be discharged along the Guan Fadong force automatic compensation channel 5 formed on the valve rod 2 to the end face of the valve closing end 2-1 of the fluid valve, namely the outlet of the Guan Fadong force automatic compensation channel 5, and compared with the pressure of fluid in the valve body, the pressure is reduced, and the fluid is easy to discharge; for an environmental sanitation vehicle, the pressure at the end face of the closing valve blocking end 2-1 is equal to the external atmospheric pressure. The fluid between the force compensation surfaces 8 of the fluid-proof accumulation components 10 and Guan Fadong is completely discharged, so that the service life of the fluid valve can be prolonged, faults can be reduced, and the use reliability of the fluid valve can be improved, for example, for an environmental sanitation vehicle, water between the force compensation surfaces 8 of the fluid-proof accumulation components 10 and Guan Fadong can freeze in winter, so that the force compensation surfaces 8 of Guan Fadong lose the applied functions and effects until the ice is melted and can not be recovered, and the normal operation of the environmental sanitation vehicle is influenced; the Guan Fadong force automatically compensates the water remained in the channel 5 and does not influence the use due to icing, because: when the valve is opened, the valve closing end 2-1 is in direct contact with fluid in the valve body, ice in one end of the Guan Fadong force automatic compensation channel 5 adjacent to the fluid flow chamber 4-3 is quickly melted and gradually moves towards the Guan Fadong force compensation end 2-2, and water pressure in the fluid flow chamber 4-3 can push Guan Fadong residual ice in the force automatic compensation channel 5 to move towards a space between the fluid accumulation preventing part 10 and the Guan Fadong force compensation surface 8, so that quick melting of residual ice in the Guan Fadong force automatic compensation channel 5 is realized without affecting normal operation of the sanitation vehicle.

Example 2

As shown in fig. 3, this embodiment differs from embodiment 1 in that: an anti-impact part 13 is arranged between the one-way valve seat 21 and the valve body 1, and a flow hole 13-1 is formed on the anti-impact part 13 so as not to influence the normal flow of fluid in the fluid flow chamber 4-3, and the anti-impact part 13 presses the one-way valve seat 21 towards the valve closing movement direction of the valve rod 2. The structural design can avoid the technical problem that the one-way valve seat 21 falls off when high-pressure fluid flows out from the fluid outlet 7 during valve opening. Of course, the impact-proof component 13 and the one-way valve seat 21 may be designed as an integrally formed structure, so that the assembly is more convenient.

Example 3

As shown in fig. 4, this embodiment differs from embodiment 1 in that: the valve rod mounting body 1-3 is of a split structure, a second sealing seat 19 is arranged between the Guan Fadong force compensation chamber 4-1 and the Guan Fadong force chamber 4-2, the outer peripheral surface of the second sealing seat 19 is in liquid sealing with the inner wall of the valve rod reciprocating motion channel 4, the valve rod 2 passes through a middle hole on the second sealing seat 19, and the outer peripheral surface of the valve rod 2 is in liquid sealing with the inner wall of the middle hole on the second sealing seat 19; a second annular groove 19-1 is formed in the outer peripheral surface of the second sealing seat 19, a second radial flow guide hole 19-2 is formed in the second sealing seat 19, one end of the second radial flow guide hole 19-2 is in fluid communication with a gap between the valve rod 2 and the inner wall of the middle hole on the second sealing seat 19, one end of the second radial flow guide hole 19-2 is in fluid communication with the second annular groove 19-1, a second liquid discharge hole 1-5 in fluid communication with the second annular groove 19-1 is formed in the valve body 1, and a muffler 16 is installed in the second liquid discharge hole 1-5; along the axial direction of the valve rod 2: at least one static sealing structure 17 is respectively arranged between the outer peripheral surfaces of the second sealing seats 19 on the two sides of the second annular groove 19-1 and the inner wall of the valve rod reciprocating motion channel 4, and at least one dynamic sealing structure 18 is respectively arranged between the outer peripheral surfaces of the valve rods 2, which are opposite to the two sides of the positions of the valve rods 2, of the second radial flow guide holes 19-2 and the inner wall of the middle hole on the second sealing seat 19. This structure can better avoid the fluid in the Guan Fadong force compensation chamber 4-1 from entering the valve closing force chamber 4-2, and its technical principle is consistent with that of the first sealing seat 15 in the embodiment, and will not be described herein.

Further, another important difference between the present embodiment and embodiment 1 is that: after the valve is closed without installing the anti-fluid accumulation component 10, the power compensation blind hole 2-4 is difficult to be quickly discharged to the outside of the fluid valve along the Guan Fadong force automatic compensation channel 5 from the valve closing end 2-1, and for sanitation vehicles working in winter in the north, water accumulated in the power compensation blind hole 2-4 can be quickly frozen, so that the valve closing power compensation surface 8 can lose due function in the working process of the sanitation vehicles.

Example 4

As shown in fig. 5, the fluid valve in embodiment 2 may be adopted, and the fluid valve in embodiment 1 or embodiment 3 may be adopted, wherein two adjacent fluid valves are arranged between: the upstream fluid valve is in fluid communication with the downstream fluid inlet 6 of the fluid valve through the normally open fluid channel 14 arranged on the valve body 1, so that multiple paths of fluid supply can be realized, and the fluid valve is very suitable for sanitation vehicles requiring multiple paths of water supply.

What needs to be specifically stated is: the above description of the present invention is merely illustrative of the case where a through hole is formed along the axis of the valve stem 2 as the Guan Fadong force automatic compensation passage 5 and the valve closing force automatic compensation passage 5 is used to directly apply the force to the valve stem 2 in the valve closing direction, and those skilled in the art can make other various changes or variations without any inventive effort based on the above description of the present invention, for example:

A. The plugging hole 21-1 is provided with a hole communicated with the outside of the valve body, and an external pipeline is guided into the Guan Fadong force compensation chamber 4-1 and corresponds to the Guan Fadong force automatic compensation channel 5 in the technical scheme claimed by the invention.

B. The fluid flowing out of the automatic compensation channel 5 indirectly applies force towards the valve closing direction to the valve rod 2 by using Guan Fadong force, such as: the simplest lever can be additionally arranged, one end of the lever is driven by the fluid flowing out of the automatic compensation channel 5 by Guan Fadong force, and the other end of the lever applies force towards the valve closing direction to the valve rod 2; the rotation of the fluid driving wheel flowing out of the channel 5 can be automatically compensated by the valve closing power, the rotation of the wheel is converted into the rotation of the linear motion hydraulic driving wheel, and the rotation of the wheel is converted into the linear motion, which is common knowledge and is not described in detail herein, so that the acting force towards the valve closing direction is applied to the valve rod 2; the fluid flowing out of the automatic valve closing power compensation channel 5 can also drive a component to move linearly, and the valve rod 2 is acted on by the linear movement of the component to act on the valve closing direction.

C. The Guan Fadong force automatic compensation channel 5 is not limited to being arranged on the valve rod 2, but can also be arranged on the valve body 1, and the wall thickness of the valve body needs to be correspondingly increased.

The above all fall within the scope of the claims of the present application, and the applicant does not need to nor cannot make an exhaustive list of all embodiments.

It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary here nor is it exhaustive of all embodiments. While the obvious variations or modifications which are extended therefrom remain within the scope of the claims of this patent application.

Claims (16)

1. A fluid valve comprising a valve body (1) and a valve rod (2), wherein the valve body (1) is provided with a fluid inlet (6), a fluid outlet (7) and a valve rod reciprocating motion channel (4), the valve rod (2) is positioned in the valve rod reciprocating motion channel (4) and controls the opening or closing of the fluid valve, and when the fluid valve is opened, fluid flows from the fluid inlet (6) to the fluid outlet (7) and flows out of the fluid valve, and the fluid valve is characterized by further comprising a Guan Fadong force automatic compensation channel (5), and the fluid inlet end of the Guan Fadong force automatic compensation channel (5) is communicated with the fluid in the valve body (1); after the fluid valve is opened: the fluid in the valve body (1) flows from the fluid inlet end of the Guan Fadong force automatic compensation channel (5) to the fluid outlet end of the Guan Fadong force automatic compensation channel (5) under the pressure of the fluid, and then applies a force to the valve rod (2) towards the valve closing movement direction of the valve rod (2); after the fluid valve is closed: the Guan Fadong force automatically compensates for the reduced fluid pressure at the fluid outlet end of the passageway (5).

2. A fluid valve according to claim 1, characterized in that the fluid outlet end of the Guan Fadong force automatic compensating channel (5) is in fluid communication with a Guan Fadong force compensating surface (8) on the valve stem (2), and that fluid flowing from the fluid outlet end of the Guan Fadong force automatic compensating channel (5) exerts a force on the valve stem (2) through the Guan Fadong force compensating surface (8) in the direction of the valve closing movement of the valve stem (2).

3. A fluid valve according to claim 2, wherein the valve stem (2) is provided with a valve closing end (2-1) and a Guan Fadong force compensating end (2-2) at both ends, respectively, the valve stem (2) being reciprocally movable within the valve stem reciprocally movable passage (4) such that the valve closing end (2-1) opens or closes the fluid inlet (6), the fluid outlet (7) or a fluid passage between the fluid inlet (6) and the fluid outlet (7); the Guan Fadong force compensation surface (8) is as follows: an end face of the Guan Fadong force compensating end (2-2), or a concave face on an end face of the Guan Fadong force compensating end (2-2), or a convex face on an end face of the Guan Fadong force compensating end (2-2), or a combination of any two or three of the end face of the Guan Fadong force compensating end (2-2), a concave face on an end face of the Guan Fadong force compensating end (2-2), and a convex face on an end face of the Guan Fadong force compensating end (2-2).

4. A fluid valve according to claim 3, characterized in that the Guan Fadong force compensating surface (8) is a plane perpendicular to the direction of movement of the valve stem (2).

5. A fluid valve according to claim 3, characterized in that a compression spring (9) is mounted between the Guan Fadong force compensating end (2-2) and the valve body (1), the spring force of the compression spring (9) against the Guan Fadong force compensating end (2-2) being directed towards the closing movement direction of the valve stem (2).

6. A fluid valve according to claim 5, characterized in that a fluid-proof reservoir (10) is mounted between the compression spring (9) and the Guan Fadong force compensating surface (8), the outlet of fluid between the fluid-proof reservoir (10) and the Guan Fadong force compensating surface (8) being the Guan Fadong force automatic compensating channel (5); after the fluid valve is closed, the elastic force of the compression spring (9) drives the fluid-proof accumulation component (10) to be close to the Guan Fadong force compensation surface (8) so that fluid between the fluid-proof accumulation component (10) and the Guan Fadong force compensation surface (8) is discharged from the Guan Fadong force automatic compensation channel (5).

7. The fluid valve according to claim 6, wherein a power compensation blind hole (2-4) is formed on the end surface of the Guan Fadong force compensation end (2-2), the first end of the fluid-proof accumulation component (10) is located in the power compensation blind hole (2-4), and a liquid seal is formed between the first end of the fluid-proof accumulation component (10) and the inner wall of the power compensation blind hole (2-4), and the bottom of the power compensation blind hole (2-4) is the Guan Fadong force compensation surface (8); the compression spring (9) is located between the second end of the fluid-proof accumulation member (10) and the valve body (1).

8. The fluid valve according to claim 7, wherein a second end face of the fluid-proof accumulation member (10) is provided with a drainage blind hole (10-1), and one end of the compression spring (9) adjacent to the fluid-proof accumulation member (10) is positioned in the drainage blind hole (10-1); the hole wall of the drainage blind hole (10-1) is provided with a diversion hole (11), and an annular space (12) between the fluid accumulation prevention component (10) and the valve rod reciprocating motion channel (4) is in fluid conduction with the drainage blind hole (10-1) through the diversion hole (11).

9. The fluid valve of claim 1, wherein after the fluid valve is closed: the Guan Fadong force automatically compensates for a fluid passage disconnection between the fluid inlet end of the passage (5) and the fluid in the valve body (1).

10. A fluid valve according to claim 3, wherein the Guan Fadong force automatic compensating passage (5) is a through hole in the valve stem (2) open from the valve closing end (2-1) to the Guan Fadong force compensating end (2-2).

11. A fluid valve according to claim 3, characterized in that the shut-off end (2-1) is provided with a leakage-proof pressure compensation surface (2-3), the pressure exerted by the fluid in the valve body (1) on the leakage-proof pressure compensation surface (2-3) being directed in the direction of the shut-off movement of the valve stem (2).

12. A fluid valve according to claim 3, characterized in that an independent one-way valve seat (21) is mounted in the valve body (1), the shut-off end (2-1) closes the fluid valve by pressing against the one-way valve seat (21), an anti-impact member (13) is mounted between the one-way valve seat (21) and the valve body (1), and the anti-impact member (13) presses the one-way valve seat (21) against the valve closing movement direction of the valve stem (2).

13. The fluid valve of claim 1, wherein the valve stem reciprocation channel (4) comprises a Guan Fadong force compensation chamber (4-1), a Guan Fadong force chamber (4-2) and a fluid flow chamber (4-3), the Guan Fadong force chamber (4-2) being located between the Guan Fadong force compensation chamber (4-1) and the fluid flow chamber (4-3), and fluid seals between the Guan Fadong force chamber (4-2) and the Guan Fadong force compensation chamber (4-1) and between the Guan Fadong force chamber (4-2) and the fluid flow chamber (4-3); the valve rod (2) penetrates through the Guan Fadong force chamber (4-2), one end of the valve rod (2) extends into the fluid flow chamber (4-3), and the other end extends into the Guan Fadong force compensation chamber (4-1); -said fluid inlet (6) is in fluid communication with said fluid outlet (7) through said fluid flow chamber (4-3); the Guan Fadong force chamber (4-2) comprises a first Guan Fadong force chamber and a second Guan Fadong force chamber, the first Guan Fadong force chamber and the second Guan Fadong force chamber being fluidly sealed by a drive piston (3) fixedly mounted on the valve stem (2); the valve rod (2) is driven to synchronously move by filling fluid into the first Guan Fadong force chamber or the second Guan Fadong force chamber so as to realize opening or closing of the fluid valve.

14. A fluid valve according to claim 13, characterized in that a first sealing seat (15) is mounted between the Guan Fadong force chamber (4-2) and the fluid flow chamber (4-3), the outer peripheral surface of the first sealing seat (15) being in fluid-tight connection with the inner wall of the valve stem reciprocating channel (4), the valve stem (2) passing through a central bore in the first sealing seat (15), and the outer peripheral surface of the valve stem (2) being in fluid-tight connection with the inner wall of the central bore in the first sealing seat (15); a first annular groove (15-1) is formed in the outer peripheral surface of the first sealing seat (15), a first radial flow guide hole (15-2) is formed in the first sealing seat (15), one end of the first radial flow guide hole (15-2) is in fluid communication with a gap between the valve rod (2) and the inner wall of a middle hole in the first sealing seat (15), one end of the first radial flow guide hole (15-2) is in fluid communication with the first annular groove (15-1), a first liquid discharge hole (1-4) in fluid communication with the first annular groove (15-1) is formed in the valve body (1), and a muffler (16) is arranged in the first liquid discharge hole (1-4); along the axial direction of the valve rod (2): at least one static sealing structure (17) is arranged between the outer peripheral surface of the first sealing seat (15) at two sides of the first annular groove (15-1) and the inner wall of the valve rod reciprocating motion channel (4), and at least one dynamic sealing structure (18) is arranged between the outer peripheral surface of the valve rod (2) at two sides of the position where the first radial flow guide hole (15-2) is opposite to the valve rod (2) and the inner wall of the middle hole on the first sealing seat (15).

15. A fluid valve according to claim 13, characterized in that a second sealing seat (19) is mounted between the Guan Fadong force compensating chamber (4-1) and the Guan Fadong force chamber (4-2), the outer circumferential surface of the second sealing seat (19) being liquid tight to the inner wall of the valve stem reciprocating channel (4), the valve stem (2) passing through a central bore in the second sealing seat (19), and the outer circumferential surface of the valve stem (2) being liquid tight to the inner wall of the central bore in the second sealing seat (19); a second annular groove (19-1) is formed in the outer peripheral surface of the second sealing seat (19), a second radial flow guide hole (19-2) is formed in the second sealing seat (19), one end of the second radial flow guide hole (19-2) is in fluid communication with a gap between the valve rod (2) and the inner wall of a middle hole in the second sealing seat (19), one end of the second radial flow guide hole (19-2) is in fluid communication with the second annular groove (19-1), a second liquid discharge hole (1-5) in fluid communication with the second annular groove (19-1) is formed in the valve body (1), and a muffler (16) is arranged in the second liquid discharge hole (1-5); along the axial direction of the valve rod (2): at least one static sealing structure (17) is arranged between the outer peripheral surface of the second sealing seat (19) at two sides of the second annular groove (19-1) and the inner wall of the valve rod reciprocating motion channel (4), and at least one dynamic sealing structure (18) is arranged between the outer peripheral surface of the valve rod (2) at two sides of the position where the second radial flow guide hole (19-2) is opposite to the valve rod (2) and the inner wall of the middle hole on the second sealing seat (19).

16. A fluid diverter valve comprising two or more fluid valves according to any one of claims 1-11, between two adjacent fluid valves: the upstream fluid valve is in fluid communication with the downstream fluid inlet (6) of the fluid valve through a normally open fluid channel (14) formed in the valve body (1).