CN215635211U

CN215635211U - Flow limiting valve

Info

Publication number: CN215635211U
Application number: CN202121980167.0U
Authority: CN
Inventors: 林孝发; 林孝山; 林山; 朱昌沈
Original assignee: Xiamen Komoo Intelligent Technology Co Ltd
Current assignee: Xiamen Komoo Intelligent Technology Co Ltd
Priority date: 2021-08-22
Filing date: 2021-08-22
Publication date: 2022-01-25
Anticipated expiration: 2031-08-22

Abstract

The utility model discloses a flow limiting valve which comprises a valve body and a flow limiting sheet, wherein the valve body is provided with a liquid inlet and a liquid outlet; the valve body is provided with a valve body cavity, a first cavity and a second cavity which are communicated with each other, and the valve body cavity is divided into a first cavity and a second cavity which are not communicated with each other; the flow limiting sheet is arranged in the lining, the lining can be arranged in the first cavity in a moving way along the axial direction of the lining, a main flow channel communicated with the flow limiting sheet, the liquid inlet and the liquid outlet is formed in the lining, and a side flow channel communicated with the liquid inlet and the liquid outlet is formed between the outer side surface of the lining and the first cavity; the resetting part is positioned in the second chamber and pushes the lining through the pushing piece in a low-pressure state so as to enable the lining to open the lateral flow channel; in the high pressure state, the bushing is hydraulically actuated to close the side flow path. The utility model has no current limit under low pressure, can start stable current limit under high pressure, and solves the problem of over-small flow under low pressure.

Description

Flow limiting valve

Technical Field

The utility model relates to a flow limiting valve.

Background

The flow limiting valve is widely applied to life as a throttling valve, at present, the flow limiting valve mostly adopts a flow limiting sheet to control flow, a sealing ring of the flow limiting sheet is compressed along with the increase of pressure, the liquid inlet section is reduced, the flow is reduced, and therefore the flow limiting effect is achieved. Since the restriction of the restrictor plate is proportional to the pressure, the restrictor plate will have the same restriction even under low pressure, which results in a smaller flow rate under low pressure due to the restriction of the restrictor plate, and thus the product with low pressure requirement will be affected.

SUMMERY OF THE UTILITY MODEL

The utility model provides a flow limiting valve aiming at the technical problems in the prior art, which has no flow limitation under the condition of low pressure, but can start the function of stable flow limitation under the condition of high pressure.

The technical scheme adopted by the utility model for solving the technical problems is as follows: a flow limiting valve comprises a valve body and a flow limiting sheet, wherein the valve body is provided with a liquid inlet and a liquid outlet; the valve body is provided with a valve body cavity, a first cavity and a second cavity which are communicated with each other, and the valve body cavity is divided into a first cavity and a second cavity which are not communicated with each other; the flow limiting sheet is arranged in the lining, the lining can be arranged in the first cavity in a moving way along the axial direction of the lining, a main flow channel communicated with the flow limiting sheet, the liquid inlet and the liquid outlet is formed in the lining, and a side flow channel communicated with the liquid inlet and the liquid outlet is formed between the outer side surface of the lining and the first cavity; the resetting part is positioned in the second chamber and pushes the lining through the pushing piece in a low-pressure state so as to enable the lining to open the lateral flow channel; in the high pressure state, the bushing is hydraulically actuated to close the side flow path.

Furthermore, a sealing ring is sleeved outside the bushing, a liquid stopping surface corresponding to the sealing ring is arranged on the wall of the first chamber corresponding to the lateral flow channel, and the sealing ring is separated from or contacts with the liquid stopping surface so as to open or close the lateral flow channel.

Furthermore, the reset component comprises an elastic piece, one end of the elastic piece is abutted against the pushing piece, and the other end of the elastic piece is abutted against one end of the second chamber opposite to the pushing piece.

Furthermore, an opening is formed in one end, opposite to the pushing piece, of the second cavity of the valve body, the opening is in threaded connection with an adjusting knob, and the other end of the elastic piece abuts against the adjusting knob.

Furthermore, a surrounding wall surrounding the bushing is arranged in the first chamber, a gap is formed between the surrounding wall and the cavity surface of the first chamber, and the liquid stopping surface is arranged on the inner side surface of the surrounding wall; the liquid outlet is arranged on the side wall of the valve body, and the liquid inlet is arranged at one end of the valve body, which deviates from the pushing piece.

Further, the pushing member is an elastic diaphragm, and the peripheral edge of the diaphragm is in a fixed state, or the pushing member is a piston movable in the axial direction of the bushing.

Furthermore, the valve body comprises a plurality of shells which are connected together, the diaphragm is matched between the two corresponding shells, and the peripheral edge of the diaphragm is pressed by the two shells.

Furthermore, the number of the shells is three, the three shells are respectively a first shell, a second shell and a third shell, the first shell, the second shell and the third shell are connected one by one, the diaphragm is located between the first shell and the second shell, the side wall of the second shell is provided with the liquid outlet, and the third shell is provided with the liquid inlet.

Further, one end of the bushing facing the pushing piece is connected with the pushing piece; the inlet of the main flow channel is located at one end of the lining away from the pushing piece, and the outlet of the main flow channel is located on the side wall of the lining.

Furthermore, the flow restriction piece is arranged in one end of the lining sleeve, which is far away from the pushing piece.

Compared with the prior art, the utility model has the following beneficial effects:

1. the utility model also comprises the bush, the reset component and the pushing piece, a main flow channel controlled by the throttling of the flow-limiting sheet and a side flow channel not controlled by the throttling of the flow-limiting sheet are formed, in a low-pressure state, the bush is acted by the reset component and the pushing piece to open the side flow channel, and in a high-pressure state, the bush is driven by hydraulic pressure to close the side flow channel, so that the utility model has infinite flow under the low-pressure condition, but can start the stable flow-limiting action under the high-pressure condition, thereby solving the problem that the use is influenced by the over-small flow under the low-pressure condition. In addition, the reset component of the utility model is matched with the bushing through the pushing piece, so that the utility model is suitable for a system with a plurality of channels.

2. The sealing ring and the liquid stopping surface are arranged, so that the structure that the side flow channel is opened and closed by the lining is very simple, and the arrangement is simple and convenient.

3. The reset component is preferably an elastic part, is simple and convenient to set and is low in cost. Particularly, the arrangement of the adjusting knob facilitates the adjustment of the elasticity of the elastic member.

4. The pushing piece is preferably the diaphragm, so that the installation is simple and convenient, the occupied space is small, and the whole volume is small.

The utility model is further explained in detail with the accompanying drawings and the embodiments; a constrictor valve of the present invention is not limited to the embodiments.

Drawings

FIG. 1 is an exploded schematic view of the present invention;

FIG. 2 is a cross-sectional view of the present invention;

FIG. 3 is a schematic illustration (in cross-section) of the water intake of the present invention at low pressure;

FIG. 4 is a schematic illustration (in cross-section) of the water intake of the present invention at high pressure;

FIG. 5 is a schematic view of the utility model and the pressure versus flow of the restrictor plate;

FIG. 6 is a cross-sectional view of a simple constrictor valve;

FIG. 7 is a schematic diagram showing the relationship between the spring force of the spring of the simple flow-limiting valve and the size of the opening of the water outlet of the system according to the present invention;

1/1 ', a valve body, 11, a first shell, 12, a second shell, 13, a third shell, 14, a liquid inlet, 15, a liquid outlet, 16, a first chamber, 17, a second chamber, 18, a surrounding wall, 181, a liquid stopping surface, 2/2', a flow limiting sheet, 3/3 ', a lining, 4/4', a spring, 5, an adjusting knob, 6, a diaphragm, 7, a compression screw, 8, a sealing ring, 9, a main flow channel, 10 and a side flow channel.

Detailed Description

Referring to fig. 1 to 6, the flow limiting valve of the present invention includes a valve body 1 and a flow limiting sheet 2, wherein the valve body 1 is provided with a liquid inlet 14 and a liquid outlet 15; the valve body comprises a valve body 1, a lining 3, a resetting component and a pushing component, wherein the pushing component is arranged in the valve body 1 and divides an inner cavity of the valve body 1 into a first cavity 16 and a second cavity 17 which are not communicated, and the first cavity 16 is communicated with a liquid inlet 14 and a liquid outlet 15; the flow-limiting sheet 2 is arranged in a liner 3, the liner 3 is arranged in the first cavity 16 in a way of moving along the axial direction of the liner, a main flow channel 9 which is communicated with the flow-limiting sheet 2, a liquid inlet 14 and a liquid outlet 15 is formed inside the liner 3, and a side flow channel 10 which is communicated with the liquid inlet 14 and the liquid outlet 15 is formed between the outer side surface of the liner 3 and the first cavity 16; the resetting component is positioned in the second chamber 17 and pushes one axial end of the lining 3 through the pushing piece in a low-pressure state so that the lining 3 opens the lateral flow channel 10; in the high pressure state, the liner 3 is hydraulically driven to close the side flow channel 10. Therefore, the utility model can form the main flow channel 9 which is controlled by the throttling of the flow limiting sheet 2 and the side flow channel 10 which is not controlled by the throttling of the flow limiting sheet 2, the side flow channel 10 is opened in a low pressure state, the flow of the utility model is not too small due to the flow limiting of the flow limiting sheet 2, the side flow channel 10 is closed in a high pressure state, only the main flow channel 9 is kept unblocked, and meanwhile, the flow limiting sheet 2 on the main flow channel 9 plays a role in stably limiting the flow. The low pressure state is a state in which the pressure of the liquid flowing into the liquid inlet 14 is less than or equal to a preset value, and the high pressure state is a state in which the pressure of the liquid flowing into the liquid inlet 14 is higher than the preset value.

In this embodiment, a sealing ring 8 is sleeved outside the bushing 3, a liquid stop surface 181 corresponding to the sealing ring 8 is disposed on a cavity wall of the first cavity 16 corresponding to the lateral flow channel 10, and the sealing ring 8 is separated from or contacts the liquid stop surface 181, so as to open or close the lateral flow channel 10. The liquid stop surface 181 is specifically an inclined surface, but is not limited thereto, and in other embodiments, the liquid stop surface is a plane perpendicular to the axial direction of the valve body.

In this embodiment, the reset component includes an elastic member, one end of the elastic member abuts against the pushing member, and the other end of the elastic member abuts against one end of the second cavity 17 opposite to the pushing member. The elastic member is embodied as, but not limited to, a spring 4. In other embodiments, the reset component includes a magnet assembly including a first magnet and a second magnet, the first magnet is disposed on the pushing member, the second magnet is disposed at an end of the second chamber opposite to the pushing member, and the like magnetic poles of the first magnet and the second magnet are opposite to each other, so that the mutual repulsive force of the first magnet and the second magnet can act on the pushing member to push the pushing member against the bushing.

In this embodiment, the valve body 1 has an opening at an end of the second chamber 17 opposite to the pushing member, the opening is connected with the adjusting knob 5 through a thread, and the other end of the elastic member (i.e., the spring 4) abuts against the adjusting knob 5. Thus, the elastic force of the spring 4 acting on the pushing piece can be adjusted by adjusting the knob 5.

In this embodiment, an enclosure wall 18 surrounding the liner 3 is provided in the first chamber 16, a space is provided between the enclosure wall 18 and the cavity surface of the first chamber 16, and the liquid stop surface 181 is provided on the inner side surface of the enclosure wall 18; the liquid outlet 15 is arranged on the side wall of the valve body 1, and the liquid inlet 14 is arranged at one end of the valve body 1 deviating from the pushing piece.

In this embodiment, the pushing member is an elastic membrane 6, and the peripheral edge of the membrane 6 is in a fixed state. In other embodiments, the pusher is a piston or the like movable in the axial direction of the bush.

In this embodiment, the valve body 1 includes a plurality of housings connected together, the diaphragm 6 is fitted between the two housings, and the peripheral edge of the diaphragm 6 is pressed by the two housings. Specifically, the number of the shells is three, the three shells are respectively a first shell 11, a second shell 12 and a third shell 13, the first shell 11, the second shell 12 and the third shell 13 are connected one by one, the diaphragm 6 is located between the first shell 11 and the second shell 12, the side wall of the second shell 12 is provided with the liquid outlet 15, and the third shell 13 is provided with the liquid inlet 14. The surrounding walls 18 are arranged in the second housing 12, and the end of the space between the surrounding walls 18 and the cavity surface of the first chamber 16, which is away from the diaphragm 6, is open and is closed by the third housing 13. This configuration of the valve body 1 facilitates the installation of the membrane 6 and the formation of the internal structure of the first chamber 16.

In this embodiment, one end of the bushing 3 facing the pushing member is connected to the pushing member (i.e., the diaphragm 6), and specifically, the bushing 3 and the pushing member (i.e., the diaphragm 6) are connected together by a compression screw 7. The inlet of the main flow channel 9 is located at an end of the liner 3 facing away from the ejector, and the outlet of the main flow channel 9 is located in the sidewall of the liner 3.

In this embodiment, the restrictor plate 2 is installed in an end of the liner 3 facing away from the pushing member (i.e., the diaphragm 6).

The utility model relates to a flow limiting valve, which has the following working principle:

in a low-pressure state, the spring 4 is not compressed, the liner 3 is pushed by the diaphragm 6, so that the side flow channel 10 is opened, after liquid (specifically, but not limited to water) enters from the liquid inlet 14 of the valve body 1, one part of the liquid flows through the main flow channel 9, and the other part of the liquid flows through the side flow channel 10, at this time, the main flow channel 9 has a small flow rate due to the flow limiting effect of the flow limiting sheet 2, but the liquid flowing through the side flow channel 10 is supplemented, so that the flow rate of the liquid finally flowing out of the liquid outlet 15 of the valve body 1 is large. Therefore, in the low pressure state, the flow rate of the present invention is larger than the flow rate of the restrictor 2, and as shown in fig. 5, a line segment a indicates the linear relationship between the flow rate and the pressure in the low pressure state of the present invention, and a line segment B indicates the linear relationship between the flow rate and the pressure in the low pressure state of the restrictor 22.

In a high-pressure state, the spring 4 is compressed, the bushing 3 is driven by hydraulic pressure to drive the sealing ring 8 to contact with the liquid stop surface 181, so that the side flow channel 10 is closed, and liquid can only flow through the main flow channel 9 where the flow restriction piece 2 is located, is subjected to stable flow restriction by the flow restriction piece 2, enters the auxiliary cavity, and finally flows out of the liquid outlet 15 of the valve body 1. Therefore, the flow rate of the present invention is consistent with the flow rate of the restrictor plate 22 after the high pressure is stabilized, as shown in fig. 5, wherein the ray C shows the linear relationship between the flow rate and the pressure in the high pressure state.

Compared with a simple flow limiting valve which can realize low-pressure non-flow limiting and high-pressure stable flow limiting functions, the flow limiting valve has the characteristic of being suitable for a system with a plurality of channels.

The simple flow-limiting valve has a structure as shown in fig. 6, a bushing 3 ' is axially movably disposed in a valve body 1 ', and the bushing are directly abutted with a spring 4 ', a flow-limiting plate 2 ' is mounted in the bushing 3 ', in a critical state, the spring force F of the spring 4 ' of the simple flow-limiting valve is P1 × S1-P2 × S2, wherein P1 is the pressure applied to the bushing 3 ' by the water inlet side of the simple flow-limiting valve, the force-receiving area of the bushing 3 ' on the water inlet side of S1, P2 is the pressure applied to the bushing 3 ' by the water outlet side of the simple flow-limiting valve, S2 is the pressure-receiving area of the bushing 3 ' on the water outlet side, when the outlets of the system channels connected with the simple flow-limiting valve are different in size, the back pressure is different, which causes the P2 to be different in size, specifically, the larger the outlet of the system channel is smaller P2, and the smaller inlet pressure of the bushing 3 ' can be pushed under the condition of F, S1 and S2 being constant, to close the lateral flow channel. Therefore, the pressure for closing the flow measuring channel is inversely proportional to the size of the outlet of the system channel, as shown in fig. 7, and a ray D represents the relationship between the pressure for closing the flow measuring channel by the simple flow limiting valve and the size of the outlet of the system channel. Therefore, for the simple flow-limiting valve, the outlets of the channels of the system cannot be unified with the spring force at different times, and if a plurality of channels exist in the system and the channels are opened independently, a plurality of simple flow-limiting valves need to be applied.

For the current limiting valve, in a critical state, the elastic force F of the spring 4 is P3 × S3+ P4 × S4, where P3 is the pressure acting on the bushing 3 at the water inlet side of the current limiting valve, S3 is the stressed area of the bushing 3 at the water inlet side, P4 is the pressure stressed by the diaphragm 6 of the present invention, and S4 is the stressed area of the diaphragm 6; when P3, S3 and S4 are constant, the elastic force of the spring 4 is determined by P4, the size of the system channel outlet can affect P4, but the size of P4 is simultaneously related to the size of the side flow channel 10, the larger P4 is, the smaller the side flow channel 10 is, and conversely, the smaller P4 is, the larger the side flow channel 10 is. Therefore, the size of the side stream channel 10 mainly affects the size of P4, and the size of the system channel outlet has a negligible effect on P4. Therefore, the present invention can self-regulate to achieve the pressure stabilizing effect, the pressure of the closed side flow channel of the present invention is basically independent of the size of the outlet of the system channel, as shown in fig. 7, wherein the ray E represents the relationship between the pressure of the closed side flow channel of the present invention and the size of the outlet of the system channel. Thus, the present invention is applicable to systems having multiple channels.

The above embodiment is only used to further illustrate a flow restriction valve of the present invention, but the present invention is not limited to the embodiment, and any simple modification, equivalent change and modification made to the above embodiment according to the technical spirit of the present invention fall within the protection scope of the technical solution of the present invention.

Claims

1. A flow limiting valve comprises a valve body and a flow limiting sheet, wherein the valve body is provided with a liquid inlet and a liquid outlet; the method is characterized in that: the valve body is provided with a valve body cavity, a first cavity and a second cavity which are communicated with each other, and the valve body cavity is divided into a first cavity and a second cavity which are not communicated with each other; the flow limiting sheet is arranged in the lining, the lining can be arranged in the first cavity in a moving way along the axial direction of the lining, a main flow channel communicated with the flow limiting sheet, the liquid inlet and the liquid outlet is formed in the lining, and a side flow channel communicated with the liquid inlet and the liquid outlet is formed between the outer side surface of the lining and the first cavity; the resetting part is positioned in the second chamber and pushes the lining through the pushing piece in a low-pressure state so as to enable the lining to open the lateral flow channel; in the high pressure state, the bushing is hydraulically actuated to close the side flow path.

2. The constrictor valve of claim 1, wherein: the outer part of the bushing is sleeved with a sealing ring, the wall of the first cavity corresponding to the lateral flow channel is provided with a liquid stopping surface corresponding to the sealing ring, and the sealing ring is separated from or contacted with the liquid stopping surface so as to open or close the lateral flow channel.

3. The constrictor valve of claim 1, wherein: the reset component comprises an elastic piece, one end of the elastic piece is abutted against the pushing piece, and the other end of the elastic piece is abutted against one end of the second cavity opposite to the pushing piece.

4. The constrictor valve of claim 3, wherein: the valve body is provided with an opening at one end of the second chamber opposite to the pushing piece, the opening is in threaded connection with an adjusting knob, and the other end of the elastic piece abuts against the adjusting knob.

5. The constrictor valve of claim 2, wherein: a surrounding wall surrounding the bushing is arranged in the first chamber, a gap is formed between the surrounding wall and the cavity surface of the first chamber, and the liquid stopping surface is arranged on the inner side surface of the surrounding wall; the liquid outlet is arranged on the side wall of the valve body, and the liquid inlet is arranged at one end of the valve body, which deviates from the pushing piece.

6. The constrictor valve of any one of claims 1-5, wherein: the pushing piece is an elastic membrane, the peripheral edge of the membrane is in a fixed state, or the pushing piece is a piston capable of moving along the axial direction of the lining.

7. The constrictor valve of claim 6, wherein: the valve body comprises a plurality of shells which are connected together, the diaphragm is matched between the two corresponding shells, and the peripheral edge of the diaphragm is pressed by the two shells.

8. The constrictor valve of claim 7, wherein: the quantity of casing is three, and this three casing is first casing, second casing and third casing respectively, and this first casing, second casing, third casing link to each other one by one, the diaphragm is located between first casing and the second casing, and the lateral wall of second casing is equipped with the liquid outlet, and the third casing is equipped with the inlet.

9. The constrictor valve of claim 1, wherein: one end of the bushing facing the pushing piece is connected with the pushing piece; the inlet of the main flow channel is located at one end of the lining away from the pushing piece, and the outlet of the main flow channel is located on the side wall of the lining.

10. The constrictor valve of claim 1, wherein: the flow-limiting piece is arranged in one end of the lining sleeve, which is far away from the pushing piece.