CN219035691U

CN219035691U - Constant pressure valve

Info

Publication number: CN219035691U
Application number: CN202320433278.2U
Authority: CN
Inventors: 周如景
Original assignee: Zhongshan Willpower Motor & Electric Appliance Co ltd
Current assignee: Zhongshan Willpower Motor & Electric Appliance Co ltd
Priority date: 2023-03-09
Filing date: 2023-03-09
Publication date: 2023-05-16
Anticipated expiration: 2033-03-09

Abstract

The utility model discloses a constant pressure valve, which comprises a valve seat and a valve cover, wherein the valve cover is positioned above the valve seat and is clamped with the valve seat, a water outlet is arranged on the valve seat, a water inlet is arranged on the valve cover, an air cavity is arranged between the valve seat and the valve cover, an air hole communicated with the air cavity is arranged on the valve cover, an extension section is downwards arranged in the extension section, a source water cavity communicated with the water inlet is arranged in the extension section, a water passing hole communicated with the source water cavity is arranged on the side wall of the extension section, a first sealing ring and a second sealing ring which are positioned above and below the water passing hole are embedded in the circumferential direction of the extension section, the outer diameters of the two sealing rings are the same, a control sleeve rod is sleeved on the outer side of the extension section in a sliding manner, the inner diameter of the control sleeve rod is the same up and down, a through groove communicated with the water passing hole is arranged on the inner side wall of the control sleeve rod, a reset spring is arranged between the upper end of the control sleeve rod and the valve cover, and a low pressure cavity communicated with the water outlet is formed between the lower end of the control sleeve rod and the valve seat. The utility model is used for controlling the outlet pressure to be kept constant at a specific pressure value, so as to ensure the stability of the outlet pressure.

Description

Constant pressure valve

Technical Field

The utility model relates to the technical field of fluid delivery, in particular to a constant pressure valve.

Background

In the pipeline of the water dispenser system, the outlet pressure is often different from the inlet pressure, so a pressure reducing valve is often needed to reduce the inlet pressure to a certain required outlet pressure, so that the outlet pressure is kept constant within a certain range, but the pressure reducing valve can be always kept stable within a certain range for controlling the outlet pressure, the fluctuation range of the outlet pressure is larger, and the outlet pressure cannot be controlled to be a specific pressure value.

Disclosure of Invention

The utility model aims to provide a constant pressure valve which is used for controlling the outlet pressure to be kept constant at a specific pressure value and ensuring the stability of the outlet pressure.

In order to solve the technical problems, the utility model adopts the following scheme:

the utility model provides a constant pressure valve, including the disk seat, the valve gap is located the disk seat top and with disk seat joint, be equipped with the delivery port on the disk seat, be equipped with the water inlet on the valve gap, be formed with the air chamber between disk seat and the valve gap, be equipped with the atmospheric hole with the air chamber switch-on the valve gap, the valve gap is equipped with the extension downwards, the inside source water cavity that is equipped with and switch on with the water inlet of extension, the water hole that is equipped with on the extension lateral wall and switches on with the source water cavity, the extension circumference embedding has the first sealing washer that is located water hole upper and lower side, the second sealing washer, two sealing washer external diameters are the same, the control loop bar has been cup jointed in the extension outside slip, the control loop bar internal diameter is the same from top to bottom, set up the chute that switches on the control loop bar inside wall with water hole switch-on, be equipped with reset spring between control loop bar upper end and the valve gap, be equipped with the low pressure chamber with the delivery port switch-on with the delivery port between control loop bar lower extreme and the disk seat.

By adopting the technical scheme, the valve cover is provided with the atmospheric hole for connecting the atmospheric cavity with the atmosphere, the water inlet is arranged at the top of the cover, the water outlet is arranged at the bottom of the valve seat, the lower end of the valve cover is integrally formed with the downward extension section which is of a cylindrical structure with equal diameters from top to bottom, the source water cavity connected with the water inlet is arranged in the extension section, the water passing holes connected with the source water cavity are arranged on the side wall of the extension section, the first sealing ring and the second sealing ring which are respectively arranged above and below the water passing holes are embedded in the outer circumference of the extension section, the outer diameters of the two sealing rings are the same, the outer sliding sleeve of the extension section is provided with the control sleeve rod, the upper end and the lower end of the inner diameter of the control sleeve rod are of equal diameters, the inner wall of the control sleeve rod is provided with the water passing groove connected with the water passing holes, the first sealing ring is used for sealing the gap between the inner wall of the upper part of the control sleeve rod and the extension section, the second sealing ring is used for limiting the water flow between the water passing holes and the water passing grooves, the valve can also be used for completely sealing a waterway between the overflow groove and the water outlet, a reset spring is arranged between the control loop bar and the inner wall of the valve cover, the reset spring is positioned in the atmosphere cavity and positioned at the outer side of the atmosphere hole, a low-pressure cavity communicated with the water outlet is formed between the lower end of the control loop bar and the valve seat, the reset spring is provided with a set value in advance, the set value can be adjusted according to the pressure value required by the outlet and the inlet pressure value, when the water pressure value of the low-pressure cavity just exceeds the set value, the control loop bar just moves upwards, the set value controls the critical value of the upward movement of the loop bar, when the water pressure of the water inlet is smaller than the set value, source water is discharged from the water outlet after passing through the source water cavity, the overflow groove, the outlet pressure value is not displaced, the outlet pressure value is kept unchanged and is output, the outlet pressure value is stable and can be kept at a certain fixed value, when the pressure value of the inlet is larger than the set value, the inner diameter of the control loop rod is equal up and down, the outer diameters of the two sealing rings are the same, the radial pressure value of the control loop rod is counteracted, the water pressure in the low-pressure cavity is an axial pressure value, the pressure value is larger than the set value, the axial pressure overcomes the elasticity of the return spring and the air pressure in the air cavity, so that the control loop rod moves upwards, the second sealing ring generates a throttling effect, the water quantity delivered by the overflow groove is reduced, the water outlet pressure is reduced, the set value is a fixed value, the inlet pressure value is also a fixed value, the water pressure in the low-pressure cavity is maintained to be constant after overcoming the set value, the outlet pressure value is also a fixed value, so that the outlet pressure value is maintained to be constant, and if the inlet pressure value is larger, the second sealing ring completely seals the water path between the overflow groove and the water outlet until the water at the water outlet is output, the water pressure in the low-pressure cavity is reduced below the set value, the control loop rod moves downwards, the constant pressure valve is maintained to be constant, and the constant pressure valve pressure is not influenced by the constant pressure of the water at the outlet.

Optionally, the control loop bar includes first control loop bar, second control loop bar, first control loop bar lower extreme and second control loop bar upper end adaptation sealing connection, and the chute is seted up on the second control loop bar inside wall and is located second control loop bar lower extreme, and reset spring lower extreme is acted on the second control loop bar, and reset spring upper end is acted on the valve gap inner wall, and the control loop bar cover constitutes the accuse flow subassembly that is used for controlling delivery port water pressure under water inlet water pressure, reset spring and atmospheric intracavity atmospheric pressure combined action.

Optionally, a third sealing ring is embedded in the lower outer circumference of the second control loop bar, and the third sealing ring is tightly sealed between the second control loop bar and the inner wall of the valve seat.

Optionally, a fourth sealing ring is circumferentially sleeved at the lower end of the first control loop bar, the fourth sealing ring is tightly sealed between the outer wall of the first control loop bar and the inner wall of the second control loop bar, and the fourth sealing ring is located above the flow through groove.

Optionally, the outer wall of the second control loop bar is provided with a step structure, and the lower end of the return spring acts on the step structure.

Optionally, an overflow gap for connecting the water outlet and the low-pressure cavity waterway is arranged between the inner wall of the second control loop bar and the inner wall of the valve seat.

Optionally, be equipped with ascending boss in the disk seat, the boss is located under the extension, and the boss top is equipped with the water mouth of switch-on delivery port, and the overflow clearance is located between second control loop bar inner wall and the boss outer wall.

The utility model has the beneficial effects that:

1. according to the utility model, the outlet pressure is kept constant on a certain specific pressure value through the arrangement of the second sealing ring, the control loop bar, the reset spring and the upper and lower equal diameters of the extension section, so that the stability of the outlet pressure is ensured.

Drawings

Fig. 1 is a schematic structural view of the present utility model.

Reference numerals: 01-water outlet, 02-low pressure cavity, 03-second control loop bar, 04-reset spring, 05-fourth sealing ring, 06-first control bar, 07-first sealing ring, 08-atmosphere cavity, 09-valve cover, 10-water inlet, 11-atmosphere hole, 12-source water cavity, 13-water passing hole, 14-water passing groove, 15-second sealing ring, 16-third sealing ring, 17-valve seat, 18-water passing hole, 19-boss, 20-water passing gap and 21-extension section.

Detailed Description

The present utility model will be described in further detail with reference to examples and drawings, but embodiments of the present utility model are not limited thereto.

In the description of the present utility model, it should be noted that, directions or positional relationships indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., are directions or positional relationships based on those shown in the drawings, or are directions or positional relationships conventionally put in use of the inventive product, are merely for convenience of describing the present utility model and for simplifying the description, and are not indicative or implying that the apparatus or element to be referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be construed as limiting the present utility model.

In the description of the present utility model, it should also be noted that, unless explicitly specified and limited otherwise, the terms "disposed," "configured," "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; can be directly connected or indirectly connected through an intermediate medium, and can be communication between two elements. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

Examples

The constant pressure valve comprises a valve seat 17 and a valve cover 09, wherein the valve cover 09 is positioned above the valve seat 17 and is clamped with the valve seat 17, a water outlet 01 is formed in the valve seat 17, a water inlet 10 is formed in the valve cover 09, an atmospheric cavity 08 is formed between the valve seat 17 and the valve cover 09, an atmospheric hole 11 communicated with the atmospheric cavity 08 is formed in the valve cover 09, an extension section 21 is downwards arranged in the valve cover 09, a source water cavity 12 communicated with the water inlet 10 is arranged in the extension section 21, a water passing hole 13 communicated with the source water cavity 12 is formed in the side wall of the extension section 21, a first sealing ring 07 and a second sealing ring 15 which are positioned above and below the water passing hole 13 are embedded in the circumference of the extension section 21, the outer sides of the two sealing rings are identical in outer diameter, a control sleeve rod is sleeved on the inner side wall of the control sleeve rod in a sliding mode, a through groove 14 communicated with the water passing hole 13 is formed in the inner side wall of the control sleeve rod, a reset spring 04 is arranged between the upper end of the control sleeve rod and the valve cover 09, and a low pressure cavity 02 communicated with the water outlet 01 is formed between the lower end of the control sleeve rod and the valve seat 17.

In the embodiment, as shown in fig. 1, an atmospheric hole 11 for connecting an atmospheric cavity 08 with the atmosphere is arranged on a valve cover 09, a water inlet 10 is arranged at the top of the cover, a water outlet 01 is arranged at the bottom of a valve seat 17, a downward extending section 21 is integrally formed at the lower end of the valve cover 09, the extending section 21 is of a cylindrical structure with equal diameters from top to bottom, a source water cavity 12 connected with the water inlet 10 is arranged inside the extending section 21, a water passing hole 13 connected with the source water cavity 12 is arranged on the side wall of the extending section 21, a first sealing ring 07 and a second sealing ring 15 respectively arranged above and below the water passing hole 13 are embedded in the outer circumference of the extending section 21, the outer diameters of the two sealing rings are the same, a control sleeve rod is sleeved outside the extending section 21 in a sliding way, the inner diameter of the control sleeve rod is equal-diameter, a launder 14 is connected with the inner wall of the control sleeve rod, the first sealing ring 07 is used for sealing a gap between the inner wall of the upper part of the control sleeve rod and the extending section 21, the second sealing ring 15 is used for limiting the water flow between the water passing hole 13 and the water passing groove 14, and can also be used for completely sealing the water path between the water passing groove 14 and the water outlet 01, a reset spring 04 is arranged between the control sleeve rod and the inner wall of the valve cover 09, the reset spring 04 is positioned in the atmosphere chamber 08 and outside the atmosphere hole 11, a low-pressure chamber 02 communicated with the water outlet 01 is formed between the lower end of the control sleeve rod and the valve seat 17, the reset spring 04 is provided with a set value in advance, the set value can be adjusted according to the pressure value required by the outlet and the inlet pressure value, when the water pressure value of the low-pressure chamber 02 just exceeds the set value, the control sleeve rod just moves upwards, the set value controls the critical value of the upward movement of the sleeve rod, when the water pressure of the water inlet 10 is smaller than the set value, the source water is discharged from the water outlet 01 after passing through the source water chamber 12, the water passing hole 13 and the water passing groove 14, when the inlet pressure value is larger than a set value, the inner diameter of the control sleeve rod is equal up and down, the outer diameters of the two sealing rings are the same, the radial pressure value acting on the control sleeve rod counteracts, the water pressure in the low pressure cavity 02 is an axial pressure value, the pressure value is larger than the set value, the axial pressure overcomes the elasticity of the reset spring 04 and the air pressure in the air cavity 08, so that the control sleeve rod moves upwards, the second sealing ring 15 generates a throttling effect, the water quantity conveyed by the overflow groove 14 is reduced, the outlet pressure is reduced, the set value is a fixed value, the inlet pressure value is also a fixed value, the water pressure in the low pressure cavity 02 overcomes the set value, the outlet pressure value is also a fixed value, so that the outlet pressure value is kept constant at the fixed value, if the lower end of the control sleeve rod moves upwards to the position of the second sealing ring 15, the second sealing ring 15 completely moves downwards, the water pressure between the second sealing ring 15 and the water outlet groove 01 is completely reduced, the water pressure is not influenced by the constant value, the constant pressure is always reduced until the water pressure in the water channel is reduced, and the water channel is always kept constant at the constant pressure after the lower than the set value, the water pressure is completely reduced by the constant pressure in the water channel 01, and the water channel is always discharged from the water channel.

Further, the control loop bar comprises a first control loop bar 06 and a second control loop bar 03, the lower end of the first control loop bar 06 is in adaptive sealing connection with the upper end of the second control loop bar 03, a through groove 14 is formed in the inner side wall of the second control loop bar 03 and is positioned at the lower end of the second control loop bar 03, the lower end of a return spring 04 acts on the second control loop bar 03, the upper end of the return spring 04 acts on the inner wall of a valve cover 09, and the control loop bar is sleeved under the combined actions of water pressure of a water inlet 10, the return spring 04 and air pressure in an air cavity 08 to form a flow control assembly for controlling the water pressure of a water outlet 01.

Further, a third sealing ring 16 is embedded in the lower outer circumference of the second control sleeve 03, and the third sealing ring 16 is tightly sealed between the second control sleeve 03 and the inner wall of the valve seat 17. Specifically, a groove is formed in the outer circumference of the lower end of the second control sleeve rod 03, a third sealing ring 16 is embedded in the groove, the third sealing ring 16 is used for sealing an installation gap between the second control sleeve rod 03 and the inner wall of the valve seat 17, source water in the low-pressure cavity 02 is prevented from entering the atmosphere cavity 08, and then leaks out of the atmosphere hole 11, so that the sealing performance of the constant-pressure valve is enhanced.

Further, a fourth sealing ring 05 is circumferentially sleeved at the lower end of the first control loop bar 06, the fourth sealing ring 05 is tightly sealed between the outer wall of the first control loop bar 06 and the inner wall of the second control loop bar 03, and the fourth sealing ring 05 is located above the flow through groove 14. Specifically, a second-stage ladder structure is arranged on the outer circumference of the first control loop bar 06, the ladder structure above is used for being fixedly connected with the upper end of the second control loop bar 03 in an adapting way, and a fourth sealing ring 05 is sleeved on the ladder structure below and used for sealing a gap between the first control loop bar 06 and the second control loop bar 03, so that source water is prevented from entering the atmosphere chamber 08.

Further, the outer wall of the second control sleeve 03 has a stepped structure, and the lower end of the return spring 04 acts on the stepped structure. Specifically, the step-shaped structure is used for avoiding the return spring 04 from sliding out of the control loop bar in the extending process, so that the constant pressure valve can work stably.

Further, an overflow gap 20 for connecting the water outlet 01 with the water channel of the low pressure cavity 02 is arranged between the inner wall of the second control sleeve 03 and the inner wall of the valve seat 17. Specifically, the excess flow gap 20 is used for the source water to enter and exit the low pressure chamber 02.

Further, an upward boss 19 is disposed in the valve seat 17, the boss 19 is located under the extension section 21, a water outlet 18 for connecting the water outlet 01 is disposed at the top of the boss 19, and an overflow gap 20 is located between the inner wall of the second control sleeve 03 and the outer wall of the boss 19. Specifically, the water passing port 18 is used for conveying source water at the low-pressure cavity 02 and the water passing groove 14 to the water outlet 01.

The foregoing description of the preferred embodiment of the utility model is not intended to limit the utility model in any way, but rather to cover all modifications, equivalents, improvements and alternatives falling within the spirit and principles of the utility model.

Claims

1. The utility model provides a constant pressure valve, a serial communication port, including disk seat (17), valve gap (09) are located disk seat (17) top and with disk seat (17) joint, be equipped with delivery port (01) on disk seat (17), be equipped with water inlet (10) on valve gap (09), be formed with atmospheric cavity (08) between disk seat (17) and valve gap (09), be equipped with on valve gap (09) with atmospheric cavity (08) switch-on atmospheric hole (11), valve gap (09) are equipped with extension (21) downwards, extension (21) inside be equipped with water cavity (12) with water inlet (10) switch-on, offer on extension (21) lateral wall with water cavity (12) switch-on water hole (13), extension (21) circumference embedding have be located water first sealing washer (07) of hole (13) top and below, second sealing washer (15), two sealing washer external diameters are the same, the outside sliding sleeve has been cup jointed in the control sleeve rod, control rod internal diameter is the same from top to bottom, set up on the control rod inside wall with water through groove (14) of crossing of water hole (13) switch-on, be equipped with between control sleeve rod upper end and valve gap (09) and valve gap (04), constitute between low pressure (02) and delivery port (01) switch-on the side.

2. The constant pressure valve according to claim 1, wherein the control loop bar comprises a first control loop bar (06) and a second control loop bar (03), the lower end of the first control loop bar (06) is in adaptive sealing connection with the upper end of the second control loop bar (03), the overflow groove (14) is arranged on the inner side wall of the second control loop bar (03) and is positioned at the lower end of the second control loop bar (03), the lower end of the return spring (04) acts on the second control loop bar (03), the upper end of the return spring (04) acts on the inner wall of the valve cover (09), and the control loop bar is sleeved on the water pressure of the water inlet (10), the return spring (04) and the air pressure in the air cavity (08) to form a flow control assembly for controlling the water pressure of the water outlet (01).

3. A constant pressure valve according to claim 2, characterized in that a third sealing ring (16) is embedded in the lower outer circumference of the second control sleeve rod (03), and the third sealing ring (16) is tightly sealed between the second control sleeve rod (03) and the inner wall of the valve seat (17).

4. The constant pressure valve according to claim 2, wherein a fourth sealing ring (05) is circumferentially sleeved at the lower end of the first control sleeve rod (06), the fourth sealing ring (05) is tightly sealed between the outer wall of the first control sleeve rod (06) and the inner wall of the second control sleeve rod (03), and the fourth sealing ring (05) is located above the overflow groove (14).

5. A constant pressure valve according to claim 2, characterized in that the outer wall of the second control sleeve (03) has a stepped structure, on which the lower end of the return spring (04) acts.

6. A constant pressure valve according to claim 2, characterized in that a through-flow gap (20) for connecting the water outlet (01) with the water path of the low pressure chamber (02) is arranged between the inner wall of the second control sleeve (03) and the inner wall of the valve seat (17).

7. The constant pressure valve according to claim 6, wherein an upward boss (19) is arranged in the valve seat (17), the boss (19) is positioned under the extension section (21), a water passing port (18) for connecting the water outlet (01) is arranged at the top of the boss (19), and the overflow gap (20) is positioned between the inner wall of the second control sleeve (03) and the outer wall of the boss (19).