CN213575681U

CN213575681U - Flow valve

Info

Publication number: CN213575681U
Application number: CN202022462068.5U
Authority: CN
Inventors: 高继升; 苑林林
Original assignee: Hebei Gaoxin Hvac Equipment Co ltd
Current assignee: Hebei Gaoxin Hvac Equipment Co ltd
Priority date: 2020-10-29
Filing date: 2020-10-29
Publication date: 2021-06-29
Anticipated expiration: 2030-10-29

Abstract

The utility model provides a flow valve belongs to valve technical field, including valve body, case, diaphragm and valve rod, the valve body has the valve pocket, and the diaphragm is cut apart into response chamber and circulation passageway with the valve pocket, and the circulation passageway is equipped with on the lateral wall in response chamber and leads the pressure hole including the section of intaking and the play water section that is located the case both sides, leads pressure hole and the section of intaking or play water section intercommunication, and the response chamber is located the top of circulation passageway. The utility model provides a flow valve, the response chamber is located the top of circulation passageway, because lead the pressure port and locate on the response chamber, so lead the pressure port and also be located the top of circulation passageway, can avoid the impurity in the liquid in the circulation passageway to deposit under the action of gravity in pressure port department, some impurity in the liquid in the pressure port can get into the circulation passageway of low department under the action of gravity in addition, thereby washed away by the rivers in the circulation passageway, so can avoid leading the easy problem that blocks up in pressure port.

Description

Flow valve

Technical Field

The utility model belongs to the technical field of the valve, more specifically say, relate to a flow valve.

Background

The existing flow valve is characterized in that a diaphragm is arranged in a valve cavity, the diaphragm divides the valve cavity into an independent sensing cavity and a circulation channel through which liquid flows, a pressure guide hole is formed in the sensing cavity and is communicated with the circulation channel through the pressure guide hole, and the sensing cavity and a valve rod are respectively positioned on two sides of a valve core. When the flow valve is horizontally installed, in order to avoid the upward operation of workers and the corrosion of the valve rod, the valve rod is required to face upwards, and the sensing cavity is positioned below the flow channel. The inventor finds that in the process of using the flow valve, some impurities in the liquid in the flow channel can be deposited in the sensing cavity and the pressure guide hole at the lower part under the action of gravity, and because the liquid in the sensing cavity and the pressure guide hole is in a static state, the impurities in the sensing cavity and the pressure guide hole cannot be washed away by water flow, so that the impurities are left in the sensing cavity and the pressure guide hole, and the pressure guide hole is easily blocked.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a flow valve aims at solving the response chamber and is located the below of circulation passageway, leads the problem that the pressure port easily blockked up easily.

In order to achieve the above object, the utility model adopts the following technical scheme: the valve body is provided with a valve cavity, the valve cavity is divided into a sensing cavity and a circulating channel by the diaphragm, the circulating channel comprises a water inlet section and a water outlet section which are positioned on two sides of the valve core, pressure guide holes are formed in the side wall of the sensing cavity and communicated with the water inlet section or the water outlet section, and the sensing cavity is positioned above the circulating channel.

As another embodiment of this application, the inner wall of the section of intaking or the section of going out water is equipped with the connecting hole, lead the pressure port pass through connecting line with the connecting hole intercommunication, connecting line with the connection can be dismantled to the valve body.

As another embodiment of this application, the valve body includes the first portion that is located diaphragm top and the second portion that is located diaphragm below, first portion and second portion are used for setting respectively response chamber and circulation passageway, first portion with the second portion all has the orientation the opening of diaphragm, first portion with the connection can be dismantled to the second portion.

As another embodiment of the present application, the valve core is a spherical valve core, and the flow valve further comprises an ejection member. One end of the ejector piece penetrates into the valve cavity in a sealing mode, a first rotating groove is formed in the end face of the ejector piece and connected with the valve body, and the first rotating groove is matched and attached to one end, away from the valve rod, of the valve core.

As another embodiment of the present application, the ejector includes a first ejector shaft. The first ejector shaft is coaxially arranged with the rotation axis of the valve core and is positioned on one side of the valve core far away from the valve rod, one end of the first ejector shaft penetrates into the valve cavity in a sealing mode, the end face of the first ejector shaft is used for arranging the first rotating groove, and the first rotating groove is connected with the valve body.

As another embodiment of the present application, the ejector comprises a second ejector shaft, a thrust bearing and a bearing housing. The second pushing shaft is coaxially arranged with the rotating axis of the valve core and is positioned on one side of the valve core far away from the valve rod, and one end of the second pushing shaft penetrates into the valve cavity in a sealing mode and is connected with the valve body. The thrust bearing is positioned in the valve cavity and sleeved on the second ejection shaft. The bearing sleeve is located in the valve cavity, is rotatably sleeved on the second push shaft and is abutted to the end face, facing the valve core, of the thrust bearing, and the end face, facing the valve core, of the bearing sleeve is used for arranging a first rotating groove.

As another embodiment of this application, when one side of diaphragm is when the section of intaking, lead the pressure hole with go out the water section intercommunication, the flow valve still includes first regulating box, first valve cock pole and first elastic component. The first adjusting box penetrates through the water inlet section, one end of the first adjusting box, which deviates from the valve core, is opened, the side wall of the first adjusting box is fixedly connected with the water inlet section in a circumferential sealing mode, two coaxial first flow holes are formed in the side wall of the first adjusting box, and the first flow holes face the diaphragm. First valve cock pole with diaphragm fixed connection wears to locate two in the first flow hole and with have first annular gap between the first flow hole, be equipped with two first pistons on the first valve cock pole, two first piston corresponds two respectively first flow hole, first valve cock pole orientation when the response chamber removes, first piston reduce with correspond the clearance between the first flow hole. The first elastic piece is located the response intracavity, and the resilience force is used for to keeping away from the direction of response chamber extrudees the diaphragm.

As another embodiment of this application, when one side of diaphragm is for go out the water section, lead the pressure hole with it is intake the section intercommunication, the flow valve still includes second regulating box, second valve cock pole and second elastic component. The second adjusting box penetrates through the water outlet section, an opening is formed in one end, deviating from the valve core, of the second adjusting box, the side wall of the second adjusting box is fixedly connected with the water outlet section in a circumferential sealing mode, two coaxial second flow holes are formed in the side wall of the second adjusting box, and the second flow holes face the diaphragm. The second valve plug rod is fixedly connected with the diaphragm, penetrates through the two second flow holes and has a second annular gap with the second flow holes, two second pistons are arranged on the second valve plug rod and correspond to the two second flow holes respectively, and when the second valve plug rod moves towards the induction cavity, the second pistons expand the gaps between the second flow holes corresponding to the second pistons. The second elastic piece is located in the water outlet section, and the resilience force is used for extruding the diaphragm towards the direction of the sensing cavity.

The utility model provides a flow valve's beneficial effect lies in: compared with the prior art, the utility model discloses the flow valve, the response chamber is located the top of circulation passageway, because lead the pressure port and locate on the response chamber, so lead the pressure port and also be located the top of circulation passageway, can avoid the impurity in the liquid in the circulation passageway to deposit under the action of gravity in pressure port department, some impurity in the liquid in the pressure port can get into the circulation passageway of low department under the action of gravity in addition, thereby be washed away by the rivers in the circulation passageway, so can avoid leading the easy problem of blockking up in pressure port.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.

Fig. 1 is a schematic cross-sectional structural view of a flow valve provided in embodiment 1 of the present invention;

FIG. 2 is an enlarged schematic view of a portion A of FIG. 1;

fig. 3 is an axial structure diagram of the flow valve provided in embodiment 1 of the present invention;

fig. 4 is a schematic cross-sectional structural view of the flow valve provided in embodiment 2 of the present invention after the connecting pipeline is removed;

FIG. 5 is an enlarged schematic view of a portion B of FIG. 4;

fig. 6 is a schematic axial structure diagram of an elastic ring in the flow valve provided in embodiment 2 of the present invention;

fig. 7 is an axial structure diagram of a frame in the flow valve provided in embodiment 1 of the present invention.

In the figure: 1. a valve body; 11. an induction cavity; 111. pressure guide holes; 112. a first annular groove; 121. a water inlet section; 122. a water outlet section; 123. connecting holes; 13. a second annular groove; 14. a first part; 15. a second section; 2. a valve core; 3. a membrane; 4. a valve stem; 5. connecting a pipeline; 61. a first ejector shaft; 621. a second ejector shaft; 622. a thrust bearing; 623. a bearing sleeve; 7. a positioning tube; 8. a flow-through tube; 81. a first stage; 82. a second stage; 9. a first seal ring; 10. an elastic ring; 101. an elastic portion; 1101. a first conditioning tank; 1102. a first valve plug stem; 11021. a first piston; 11022. a first projecting portion; 11031. a first compression spring; 1201. a second conditioning tank; 1202. a second valve plug stem; 12021. a second piston; 12022. a second projection; 12031. a second compression spring; 12032. a third compression spring; 130. a frame; 1301. a slide hole; 1302. a communicating hole; 140. a first through rod; 150. an isolation sleeve; 160. a second penetration rod; 170. a limiting rod; 180. a sealing rod; 190. a second seal ring; 200. the tube is extruded.

Detailed Description

In order to make the technical problem, technical solution and advantageous effects to be solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to illustrate the present invention in further detail. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Referring to fig. 1, 2 and 4 together, the flow valve of the present invention will now be described. The flow valve comprises a valve body 1, a valve core 2, a membrane 3 and a valve rod 4, wherein the valve body 1 is provided with a valve cavity, the membrane 3 divides the valve cavity into an induction cavity 11 and a circulation channel, the circulation channel comprises a water inlet section 121 and a water outlet section 122 which are positioned on two sides of the valve core 2, a pressure guide hole 111 is formed in the side wall of the induction cavity 11 and communicated with the water inlet section 121 or the water outlet section 122, and the induction cavity 11 is positioned above the circulation channel.

The utility model provides a flow valve, compared with the prior art, response chamber 11 is located the top of circulation passageway, because lead pressure hole 111 locate on response chamber 11, so lead pressure hole 111 and also be located the top of circulation passageway, can avoid the impurity in the liquid in the circulation passageway to deposit under the action of gravity and lead pressure hole 111 department, and lead some impurity in the liquid in pressure hole 111 can get into the circulation passageway of low department under the action of gravity in addition, thereby be washed away by the rivers in the circulation passageway, so can avoid leading the easy problem that blocks up of pressure hole 111.

As a specific implementation manner of the flow valve provided in the present invention, please refer to fig. 1, fig. 3 and fig. 4, in order to realize that the water inlet section 121 or the water outlet section 122 communicates with the pressure guide hole 111, the inner wall of the water inlet section 121 or the water outlet section 122 is provided with the connection hole 123, the pressure guide hole 111 communicates with the connection hole 123 through the connection pipeline 5, and the connection pipeline 5 is detachably connected with the valve body 1. After the connecting pipe 5 is removed, the connecting pipe 5, the connecting hole 123 and the pressure guide hole 111 may be cleaned.

As a specific implementation manner of the flow valve, please refer to fig. 1 and 4, the valve body 1 includes a first portion 14 located above the diaphragm 3 and a second portion 15 located below the diaphragm 3, the first portion 14 and the second portion 15 are respectively used for setting the sensing cavity 11 and the circulation channel, the first portion 14 and the second portion 15 both have an opening facing the diaphragm 3, and the first portion 14 and the second portion 15 are detachably connected. The first portion 14 is removed to facilitate cleaning of the sensing chamber 11 and the pressure guide hole 111.

As a specific embodiment of the flow valve provided by the present invention, please refer to fig. 1 and 4, the valve core 2 is a spherical valve core 2, and the flow valve further includes a pushing member. One end of the ejector piece penetrates into the valve cavity in a sealing mode, a first rotating groove is formed in the end face of the ejector piece and connected with the valve body 1, and the first rotating groove is matched and attached to one end, deviating from the valve rod 4, of the valve core 2. When installing this flow valve in the pipeline, valve rod 4 is up, and first rotatory recess is used for bearing case 2 and rotates, only needs very little extrusion force when case 2 is sealed, so the bulk friction when case 2 rotates is less, has avoided the problem that needs great moment of torsion just can rotate case 2.

As a specific embodiment of the flow valve provided in the present invention, please refer to fig. 1, the ejecting member includes a first ejecting shaft 61. The first top pushing shaft 61 is coaxially arranged with the rotation axis of the valve core 2, is positioned on one side of the valve core 2 far away from the valve rod 4, and has one end penetrating into the valve cavity in a sealing manner and the end surface used for arranging a first rotating groove and connected with the valve body 1. The structure is simple and easy to process. In the present embodiment, the first ejector shaft 61 and the valve body 1 may be connected by a seal thread.

Referring to fig. 4 to 5, the pushing member includes a second pushing shaft 621, a thrust bearing 622, and a bearing sleeve 623. The second pushing shaft 621 is coaxially arranged with the rotation axis of the valve core 2, and is located on one side of the valve core 2 away from the valve rod 4, and one end of the second pushing shaft penetrates into the valve cavity in a sealing manner and is connected with the valve body 1. The thrust bearing 622 is located in the valve cavity and sleeved on the second pushing shaft 621. The bearing sleeve 623 is located in the valve cavity, is rotatably sleeved on the second top pushing shaft 621 and is abutted to the end face, facing the valve element 2, of the thrust bearing 622, and the end face, facing the valve element 2, of the bearing sleeve 623 is used for arranging a first rotating groove. The rotation of the valve core 2 can drive the rolling bodies in the thrust bearing 622 to roll, thereby further reducing the torque required for driving the valve core 2 to rotate. In this embodiment, the second pushing shaft 621 and the valve body 1 may be connected by a sealing screw.

As a specific embodiment of the flow valve provided in the present invention, please refer to fig. 4 to 5, the flow valve further includes a positioning pipe 7, a flow pipe 8, a first sealing ring 9 and an elastic ring 10. The locating tubes 7 are two and penetrate through the flow passage, the two locating tubes 7 are respectively located on two sides of the valve core 2, and the outer wall of each locating tube 7 is fixedly connected with the circumferential sealing of the flow passage. The circulation pipe 8 is two, and two circulation pipes 8 are located the both sides that two registration arms 7 correspond to case 2 respectively, and circulation pipe 8 includes the less first section 81 of external diameter and the great second section 82 of external diameter, and one section of first section 81 is sealed to slide and is worn to locate in the circulation pipe 8 of homonymy, and the port of second section 82 is equipped with the holding tank towards case 2 and terminal surface. First sealing washer 9 is two, and two first sealing washers 9 are located two holding tanks respectively, and two first sealing washers 9 are used for from both sides and case 2 laminating sealedly. The number of the elastic rings 10 is two, the two elastic rings 10 are respectively sleeved on the two first sections 81, and two ends of the elastic rings 10 respectively extrude the corresponding positioning tubes 7 and the second sections 82. The rotation of the valve core 2 can realize the communication and the closing of the two circulation pipes 8, namely the communication and the closing of the circulation channels, thereby realizing the function of the valve. In the use process of the flow valve, the first sealing ring 9 can be worn along with the rotation of the valve core 2, and the circulating pipe 8 can slide towards the valve core 2 due to the resilience force of the elastic ring 10, so that the first sealing ring 9 and the valve core 2 are always kept sealed. Further, in order to ensure the sealing effect between the first sealing ring 9 and the valve core 2, a second rotating groove rotationally attached to the valve core 2 is formed in the end face, facing the valve core 2, of the first sealing ring 9.

As a specific embodiment of the flow valve provided in the present invention, please refer to fig. 5 to 6, two ends of the elastic ring 10 are respectively provided with a plurality of elastic portions 101 outwardly forming an arch shape along the axial direction of the elastic ring 10, and the elastic portions 101 are used for extruding the positioning tube 7 or the second section 82. The elastic ring 10 has good elasticity and long service life.

As a specific implementation manner of the flow valve provided in the present invention, please refer to fig. 1, when one side of the diaphragm 3 is the water inlet section 121, the pressure guiding hole 111 is communicated with the water outlet section 122, and the flow valve further includes a first adjusting box 1101, a first valve plug 1102 and a first elastic member. First regulating box 1101 wears to locate in the section 121 of intaking, and the one end opening and the lateral wall that deviate from case 2 and the section 121 circumference sealed fixed connection of intaking, the lateral wall is equipped with two coaxial first flow orifices, and first flow orifice is towards diaphragm 3. The first valve plug rod 1102 is fixedly connected with the diaphragm 3, penetrates through the two first flow holes and is provided with a first annular gap between the first flow holes, two first pistons 11021 are arranged on the first valve plug rod 1102, the two first pistons 11021 respectively correspond to the two first flow holes, and when the first valve plug rod 1102 moves towards the induction cavity 11, the first pistons 11021 reduce the gap between the first flow holes and the corresponding first flow holes. The first elastic member is located in the sensing cavity 11, and the resilience force is used for extruding the membrane 3 in a direction away from the sensing cavity 11. The pressure of the liquid in the water outlet section 122 is transmitted to one side of the diaphragm 3 in the sensing cavity 11, the one side of the diaphragm 3 also bears the resilience of the first elastic member, and the other side of the diaphragm 3 bears the pressure of the liquid in the water inlet section 121. When the pressure difference between the water inlet section 121 and the water outlet section 122 increases, the diaphragm 3 drives the first valve plug rod 1102 to move toward the direction close to the sensing cavity 11, and the gap between the first piston 11021 and the corresponding first flow orifice becomes smaller, so that the flow rate between the water inlet section 121 and the water outlet section 122 becomes smaller, that is, the pressure difference between the water inlet section 121 and the water outlet section 122 decreases, and finally the pressure difference and the flow rate between the water inlet section 121 and the water outlet section 122 are restored to the set values; when the pressure difference between the water inlet section 121 and the water outlet section 122 decreases, the diaphragm 3 drives the first valve plug rod 1102 to move away from the sensing cavity 11, and the gap between the first piston 11021 and the corresponding first flow orifice becomes larger, so that the flow rate between the water inlet section 121 and the water outlet section 122 becomes larger, that is, the pressure difference between the water inlet section 121 and the water outlet section 122 becomes larger, and finally the pressure difference and the flow rate between the water inlet section 121 and the water outlet section 122 return to the set values. In this embodiment, please refer to fig. 2, in order to realize the function of the first elastic element, a section of the first valve plug rod 1102 is located in the sensing cavity 11 and is provided with a first protrusion 11022 which is outward along the transverse direction of the first valve plug rod 1102, the flow valve further includes a first penetrating rod 140 connected with the valve body 1, one end of the first penetrating rod 140 penetrates into the sensing cavity 11 in a sealing manner, and the first elastic element includes a first compression spring 11031. The two ends of the first compression spring 11031 are respectively sleeved on the first penetrating rod 140 and the first valve plug rod 1102 and respectively extrude the inner wall and the first protrusion 11022 of the sensing cavity 11, and the resilience of the first compression spring 11031 is used for driving the first valve plug rod 1102 to move towards the direction far away from the sensing cavity 11, so that the extrusion membrane 3 is realized. The first through rod 140 and the valve body 1 may be connected by a sealing thread.

As a specific embodiment of the flow valve provided by the present invention, please refer to fig. 4, when one side of the diaphragm 3 is the water outlet section 122, the pressure guide hole 111 is communicated with the water inlet section 121, and the flow valve further includes a second adjusting box 1201, a second valve plunger 1202 and a second elastic member. The second adjusting box 1201 is arranged in the water outlet section 122 in a penetrating manner, one end of the second adjusting box, which is away from the valve core 2, is opened, the side wall of the second adjusting box is fixedly connected with the water outlet section 122 in a circumferential sealing manner, two coaxial second flow holes are formed in the side wall of the second adjusting box, and the second flow holes face the membrane 3. The second valve plunger 1202 is fixedly connected with the diaphragm 3, penetrates through the two second flow holes, and has a second annular gap with the second flow holes, two second pistons 12021 are arranged on the second valve plunger 1202, the two second pistons 12021 respectively correspond to the two second flow holes, and when the second valve plunger 1202 moves towards the sensing cavity 11, the second pistons 12021 expand the gap with the corresponding second flow holes. The second elastic member is located in the water outlet section 122, and the resilience force is used for pressing the membrane 3 towards the sensing chamber 11. The pressure of the liquid in the water inlet section 121 is transmitted to one side of the diaphragm 3 in the sensing cavity 11, and the other side of the diaphragm 3 bears the pressure of the liquid in the water outlet section 122 and the resilience of the second elastic member. When the pressure difference between the water inlet section 121 and the water outlet section 122 increases, the diaphragm 3 drives the second valve plug rod 1202 to move away from the sensing cavity 11, and the gap between the second piston 12021 and the corresponding second flow hole becomes smaller, so that the flow rate between the water inlet section 121 and the water outlet section 122 becomes smaller, that is, the pressure difference between the water inlet section 121 and the water outlet section 122 becomes smaller, and finally the pressure difference and the flow rate between the water inlet section 121 and the water outlet section 122 are restored to the set values; when the pressure difference between the water inlet section 121 and the water outlet section 122 decreases, the diaphragm 3 drives the second valve plug rod 1202 to move toward the sensing cavity 11, and the gap between the second piston 12021 and the corresponding second flow hole increases, so that the flow rate between the water inlet section 121 and the water outlet section 122 increases, that is, the pressure difference between the water inlet section 121 and the water outlet section 122 increases, and finally the pressure difference and the flow rate between the water inlet section 121 and the water outlet section 122 return to the set values. In this embodiment, in order to realize the function of the second elastic member, an isolation sleeve 150 fixedly connected to the valve body 1 is disposed in the water outlet section 122, the isolation sleeve 150 is sleeved on the second valve plunger 1202 and has a third annular gap with the second valve plunger 1202, the isolation sleeve 150 and the diaphragm 3 are disposed at an interval along the length direction of the second valve plunger 1202, and the second elastic member includes a second compression spring 12031. The second compression spring 12031 is sleeved on the second valve plug rod 1202 and has two ends respectively pressing the diaphragm 3 and the isolation sleeve 150. Furthermore, a section of the second valve plug rod 1202 far away from the sensing cavity 11 is provided with a second protruding portion 12022 which is outward along the transverse direction of the second valve plug rod 1202, the flow valve further comprises a second penetrating rod 160 connected with the valve body 1, the second penetrating rod 160 is parallel to the second valve plug rod 1202 and is located on one side of the second valve plug rod 1202 far away from the sensing cavity 11, one end of the second penetrating rod 160 penetrates into the water outlet section 122 in a sealing manner, and the second elastic element comprises a third compression spring 12032. The two ends of the third compression spring 12032 are respectively sleeved on the second through rod 160 and the second valve plunger rod 1202 and respectively extrude the inner wall and the second protrusion 12022 of the water section 122, and the third compression spring 12032 is used for driving the second valve plunger rod 1202 to move towards the sensing cavity 11, so that the membrane 3 is extruded. The second penetration rod 160 and the valve body 1 may be connected by a sealing thread.

As a specific implementation manner of the flow valve provided in the present invention, please refer to fig. 2 and fig. 7, the valve cavity is fixedly provided with the frame 130, the frame 130 is provided with the sliding hole 1301 and the communication hole 1302 located outside the sliding hole 1301, and the sliding hole 1301 is slidably sleeved on the first valve plug rod 1102, so as to ensure that the first valve plug rod 1102 moves along the length direction of the first valve plug rod 1102.

As a specific embodiment of the flow valve provided in the present invention, please refer to fig. 4, one end of the second valve plug rod 1202 is located in the sensing cavity 11, and the flow valve further includes a limiting rod 170. The limiting rod 170 is parallel to the second valve plunger rod 1202, one end of the limiting rod penetrates into the sensing cavity 11 in a sealing mode and can move along the length direction of the second valve plunger rod 1202, and when the second valve plunger rod 1202 moves towards the sensing cavity 11, the limiting rod 170 is used for limiting the moving distance of the second valve plunger rod 1202. The distance between the limiting rod 170 and the second valve plug rod 1202, that is, the maximum moving distance when the limiting rod 170 moves towards the sensing cavity 11, is changed by moving the limiting rod 170, so as to control the maximum flow rate at the second flow rate hole.

As a specific implementation manner of the flow valve provided in the present invention, please refer to fig. 4, the inner wall of the sensing cavity 11 is provided with a first annular groove 112, a second annular groove 13 attached to the diaphragm 3 is provided in the valve body 1, the valve body 1 is provided with an adjusting hole, the adjusting hole is communicated with both the first annular groove 112 and the second annular groove 13, and the flow valve further includes a sealing rod 180. One end of the sealing rod 180 is sealed and arranged in the adjusting hole in a penetrating mode and can move along the adjusting hole, and the sealing rod 180 moves to achieve opening and closing between the first annular groove 112 and the second annular groove 13. When the sealing rod 180 moves to a proper position, the first annular groove 112 and the second annular groove 13 can be communicated, the diaphragm 3 deforms under the action of liquid pressure in the sensing cavity 11, the sensing cavity 11 is communicated with the circulation channel, and therefore the pressure difference between the sensing cavity 11 and the circulation channel is finely adjusted. In this embodiment, the sealing rod 180 and the adjusting hole may be connected by a sealing thread, the membrane 3 may be provided with a folded edge, and the folded edge of the membrane 3 may be sleeved on the sealing rod 180.

As a specific implementation of the flow valve, please refer to fig. 1, be equipped with two second sealing washer 190 in the circulation passageway, two second sealing washers 190 from both sides with the sealed laminating of case 2, be equipped with the extrusion pipe 200 with 1 threaded connection of valve body in the circulation passageway, extrusion pipe 200 is used for extruding two second sealing washers 190 from both sides with 1 cooperation of valve body to make two second sealing washers 190 press from both sides tight case 2, after 190 wearing and tearing of second sealing washer, the structure of this kind of form can make things convenient for the change of second sealing washer 190. In the present embodiment, the pressing pipe 200 may be made to communicate with the pressure guide hole 111.

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims

1. The flow valve comprises a valve body, a valve core, a diaphragm and a valve rod, wherein the valve body is provided with a valve cavity, the diaphragm divides the valve cavity into an induction cavity and a circulation channel, the circulation channel comprises a water inlet section and a water outlet section which are positioned on two sides of the valve core, the side wall of the induction cavity is provided with a pressure guide hole, and the pressure guide hole is communicated with the water inlet section or the water outlet section.

2. The flow valve of claim 1 characterized in that the inner wall of the water inlet section or the water outlet section is provided with a connecting hole, the pressure guide hole is communicated with the connecting hole through a connecting pipeline, and the connecting pipeline is detachably connected with the valve body.

3. The flow valve of claim 1 wherein the valve body includes a first portion above the diaphragm and a second portion below the diaphragm, the first and second portions being configured to define the sensing chamber and the flow passage, respectively, the first and second portions each having an opening toward the diaphragm, the first and second portions being removably connected.

4. The flow valve of claim 1 wherein the spool is a spherical spool, the flow valve further comprising:

and one end of the ejection piece penetrates into the valve cavity in a sealing manner, a first rotating groove is arranged on the end face of the ejection piece and connected with the valve body, and the first rotating groove is matched and attached with one end of the valve core, which deviates from the valve rod.

5. The flow valve of claim 4 wherein the ejection member comprises:

the first pushing shaft is coaxial with the rotating axis of the valve core and located on one side, away from the valve rod, of the valve core, one end of the first pushing shaft penetrates into the valve cavity in a sealing mode, the end face of the first pushing shaft is used for arranging the first rotating groove, and the first pushing shaft is connected with the valve body.

6. The flow valve of claim 4 wherein the ejection member comprises:

the second ejector shaft is coaxially arranged with the rotating axis of the valve core, is positioned on one side of the valve core away from the valve rod, and has one end penetrating into the valve cavity in a sealing manner and connected with the valve body;

the thrust bearing is positioned in the valve cavity and sleeved on the second ejector shaft;

the bearing sleeve is positioned in the valve cavity, is rotatably sleeved on the second push shaft and is abutted to the end face, facing the valve core, of the thrust bearing, and the end face, facing the valve core, of the bearing sleeve is used for arranging a first rotating groove.

7. The flow valve of claim 4 wherein the flow valve further comprises:

the two positioning pipes penetrate through the flow channel, the two positioning pipes are respectively positioned on two sides of the valve core, and the outer wall of each positioning pipe is fixedly connected with the circumferential direction of the flow channel in a sealing manner;

the two circulation pipes are respectively positioned on two sides of the valve core corresponding to the two positioning pipes, each circulation pipe comprises a first section with a smaller outer diameter and a second section with a larger outer diameter, one section of the first section is hermetically and slidably arranged in the circulation pipes on the same side, and a port of the second section faces the valve core and is provided with an accommodating groove on the end face;

the two first sealing rings are respectively positioned in the two accommodating grooves and are used for being attached and sealed with the valve core from two sides;

the two elastic rings are respectively sleeved on the two first sections, and two ends of each elastic ring respectively extrude the corresponding positioning tube and the corresponding second section.

8. The flow valve of claim 7 wherein the resilient ring has a plurality of resilient portions at each end, the resilient portions being arcuate axially outwardly of the resilient ring, the resilient portions being adapted to compress the positioning tube or the second section.

9. The flow valve of claim 1 wherein the pressure port communicates with the water outlet section when the inlet section is on one side of the diaphragm, the flow valve further comprising:

the first adjusting box is arranged in the water inlet section in a penetrating mode, one end, away from the valve core, of the first adjusting box is opened, the side wall of the first adjusting box is fixedly connected with the water inlet section in a circumferential sealing mode, two coaxial first flow holes are formed in the side wall of the first adjusting box, and the first flow holes face the diaphragm;

the first valve plug rod is fixedly connected with the diaphragm, penetrates through the two first flow holes and is provided with a first annular gap with the first flow holes, two first pistons are arranged on the first valve plug rod and respectively correspond to the two first flow holes, and when the first valve plug rod moves towards the sensing cavity, the first pistons reduce the gap between the first piston and the corresponding first flow holes;

the first elastic piece is located in the sensing cavity, and the resilience force is used for extruding the diaphragm in the direction away from the sensing cavity.

10. The flow valve of claim 1 wherein the pressure port communicates with the water inlet section when one side of the diaphragm is the water outlet section, the flow valve further comprising:

the second adjusting box is arranged in the water outlet section in a penetrating mode, one end, away from the valve core, of the second adjusting box is opened, the side wall of the second adjusting box is fixedly connected with the water outlet section in a circumferential sealing mode, two coaxial second flow holes are formed in the side wall of the second adjusting box, and the second flow holes face the diaphragm;

the second valve plug rod is fixedly connected with the diaphragm, penetrates through the two second flow holes, and is provided with a second annular gap with the second flow holes, two second pistons are arranged on the second valve plug rod and respectively correspond to the two second flow holes, and when the second valve plug rod moves towards the induction cavity, the second pistons expand the gaps between the second flow holes corresponding to the second pistons;

and the second elastic piece is positioned in the water outlet section, and the resilience force is used for extruding the diaphragm towards the direction of the sensing cavity.