Built-in micro-discharge gas injection valve

Abstract

The utility model belongs to the technical field of valves, and particularly discloses a built-in micro-exhaust gas injection valve which comprises a valve body, a movable gas suction valve clack is mounted in the valve body, and a micro-exhaust passage penetrating through the upper end and the lower end of the gas suction valve clack is arranged in an inner cavity of the valve body; a movable micro-discharge valve clack is arranged in the valve body, the micro-discharge valve clack is located below the air suction valve clack, and the micro-discharge valve clack is connected with the air suction valve clack through a connecting piece; a floating ball is arranged in the valve body and connected with the micro exhaust valve clack, and the floating ball can rise and fall in a floating mode along with changes of the water level in the valve body so as to drive the micro exhaust valve clack to open and close the micro exhaust channel. The built-in micro-exhaust gas injection valve is small in overall appearance size and extremely high in anti-freezing capacity.

Description

Technical Field

[0001] The present application belongs to the field of valve technology, and more specifically, relates to a built-in micro-displacement gas injection valve. Background Art

[0002] The micro-exhaust air injection valve is an important valve installed on the water pipeline for micro-exhaust, large-scale suction under negative pressure, and suppression and reduction of water hammer.

[0003] In the related technology, a Chinese patent document with publication number CN203836297U discloses a large-proportion high-suction micro-displacement air valve that is anti-scaling and anti-pollution. The high-suction micro-displacement air valve is a traditional micro-displacement air injection valve, which includes a micro-exhaust valve and a negative pressure suction valve, and the micro-exhaust valve is installed on the outside of the negative pressure suction valve through a connecting pipe.

[0004] In this type of traditional micro-exhaust air injection valve, since the micro-exhaust valve is installed on the outside of the negative pressure suction valve, the overall size of the valve is large, resulting in a large space being required, which is not conducive to the installation of the valve; in addition, since the micro-exhaust valve is directly exposed to the external environment, its anti-freezing ability is weak, which is not conducive to the long-term and stable operation of the micro-exhaust air injection valve, and therefore urgently needs improvement. Utility Model Content

[0005] In response to the defects or improvement needs of the existing technology, the present application provides a built-in micro-displacement air injection valve, which aims to solve the problems of large external dimensions and weak anti-freezing ability of traditional micro-displacement air injection valves.

[0006] The present application provides a built-in micro-displacement gas injection valve, specifically comprising a valve body, wherein:

[0007] A movable air intake valve disc is installed in the valve body, and a micro exhaust channel is provided in the inner cavity of the valve body, which passes through the upper and lower ends of the air intake valve disc;

[0008] A movable micro-displacement valve disc is provided in the valve body, the micro-displacement valve disc is located below the air-intake valve disc, and the micro-displacement valve disc is connected to the air-intake valve disc through a connecting piece;

[0009] A float is provided in the valve body and is connected to the micro-exhaust valve flap. The float can float up and down as the water level in the valve body changes, so as to drive the micro-exhaust valve flap to open and close the micro-exhaust passage.

[0010] Through the above technical solutions conceived by this application, this design integrates micro-exhaust structures such as micro-exhaust channels and micro-exhaust valve flaps inside the valve body, so that the valve has a smaller outer size and can greatly save installation space; in addition, since the micro-exhaust structure is arranged inside the valve body, compared with the traditional micro-exhaust air injection valve with an external micro-exhaust valve, the anti-freezing ability of this micro-exhaust air injection valve is stronger.

[0011] As a further preference, the connecting member includes a connecting frame with a guide hole, the upper end of the micro-displacement valve flap can abut against the outer end surface of the upper opening of the guide hole, and the lower end of the micro-displacement valve flap passes through the guide hole and is connected to the float.

[0012] As a further preferred embodiment, a push rod is provided in the valve body, and the micro-displacement valve disc is detachably connected to the float via the push rod.

[0013] As a further preference, a micro-exhaust valve seat is installed at the air inlet of the micro-exhaust duct, and the micro-exhaust valve seat and the micro-exhaust valve disc constitute a micro-exhaust sealing pair to seal the air inlet.

[0014] As a further preference, the micro-row valve seat is detachably connected to the air inlet.

[0015] As a further preferred embodiment, a valve shaft is provided in the valve body, the upper end of the valve shaft is elastically connected to the inside of the valve body through an elastic member, and the suction valve disc is sleeved and fixed on the lower end of the valve shaft.

[0016] As a further preferred embodiment, the micro exhaust channel is arranged in the valve shaft, and the micro exhaust channel includes a main air channel extending upward from the lower end surface of the valve shaft, and a plurality of branch air channels extending from the circumferential surface of the valve shaft toward the axis center, and the branch air channels are located above the intake valve disc and connected to the main air channel.

[0017] As a further preference, the upper end of the valve shaft is connected to a limiting structure that can be adjusted in axial displacement, and the limiting structure conflicts with the elastic member.

[0018] As a further preference, the built-in micro-displacement gas injection valve further includes a valve cover, and the valve cover fixing cover is arranged on the upper end of the valve body.

[0019] As a further preferred embodiment, a discharge port is provided on the circumferential side wall of the valve body, and a detachable plug is installed at the outer end of the discharge port.

[0020] In general, the above technical solutions conceived by this application have the following technical advantages compared with the existing technology:

[0021] 1. This design integrates micro-exhaust structures such as micro-exhaust channels and micro-exhaust discs inside the valve body, making the valve smaller in size, highly frost-proof, and significantly saving installation space.

[0022] 2. The suction valve disc is hoisted inside the valve body via the valve shaft and elastic parts. This not only prevents the elastic parts from rusting due to immersion in the medium, but also facilitates debugging. In addition, the main valve disc and main valve seat rarely come into contact with water during actual use, making this built-in micro-discharge air injection valve also suitable for use in sewage pipes.

[0023] 3. After installing the connecting bracket with the guide hole, the micro-exhaust valve disc and float can be connected as a whole below the suction valve disc to prevent it from falling off. In addition, the guide hole can guide the micro-exhaust valve disc so that the micro-exhaust valve disc can accurately open and close the micro-exhaust duct. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 This is a structural schematic diagram of a built-in micro-displacement gas injection valve provided in an embodiment of the present application.

[0025] Figure 2 This is a partial structural diagram of a built-in micro-displacement gas injection valve provided in an embodiment of the present application.

[0026] Throughout the drawings, the same reference numerals are used to denote the same elements or structures, wherein:

[0027] 1. Valve body; 1-1. Main body; 1-2. Valve cover; 1-3. Main valve seat; 2. Intake valve disc; 3. Micro-exhaust valve disc; 4. Float; 5. Connecting frame; 6. Push rod; 7. Micro-exhaust valve seat; 8. Valve shaft; 9. Elastic part; 10. Valve cover; 11. Plug; 12. Nut; 13. Spring sleeve; 14. Sealing ring; 15. Guide sleeve; 16. Stud; 17. Filter; 100. Micro-exhaust duct; 100-1. Main air duct; 100-2. Branch air duct. DETAILED DESCRIPTION

[0028] In order to make the purpose, technical solutions and advantages of this application more clear, the following further describes this application in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain this application and are not intended to limit this application.

[0029] The following is combined with Figure 1-Figure 2 This application is described in further detail.

[0030] The embodiment of the present application discloses a built-in micro-discharge gas injection valve. Figure 1-Figure 2 The built-in micro-exhaust air injection valve includes a valve body 1, wherein a movable suction valve disc 2 is installed in the valve body 1, and the inner cavity of the valve body 1 has a micro-exhaust channel 100 running through the upper and lower ends of the suction valve disc 2; a movable micro-exhaust valve disc 3 is also provided in the valve body 1, and the micro-exhaust valve disc 3 is located below the suction valve disc 2, and the micro-exhaust valve disc 3 is connected to the suction valve disc 2 through a connecting piece; in addition, a float 4 is also provided in the valve body 1, and the float 4 is connected to the micro-exhaust valve disc 3. The float 4 can float and rise and fall with the change of the water level in the valve body 1 to drive the micro-exhaust valve disc 3 to open and close the micro-exhaust channel 100.

[0031] Under this design, the micro-exhaust duct 100, the micro-exhaust valve flap 3 and other structures can be integrated into a micro-exhaust structure in the valve body 1. This design can make the valve's external dimensions smaller and save installation space; and because the micro-exhaust structure is arranged inside the valve body 1, compared with the traditional micro-exhaust air injection valve with an external micro-exhaust valve, the anti-freeze ability of this micro-exhaust air injection valve is stronger.

[0032] Furthermore, in some embodiments, the connecting member includes a connecting frame 5 with a guide hole, the upper end of the micro-valve flap 3 can be in contact with the outer end surface of the upper opening of the guide hole, and the lower end of the micro-valve flap 3 passes through the guide hole and is connected to the float 4.

[0033] In this design, by providing a connecting frame 5, the micro-exhaust valve disc 3 and the float 4 can be integrally connected to the bottom of the suction valve disc 2 in an anti-detachment manner. In addition, the provided guide hole can guide the micro-exhaust valve disc 3 so that the micro-exhaust valve disc 3 can accurately open and close the micro-exhaust channel 100.

[0034] Of course, in other embodiments, the connecting piece may also be a connecting seat with holes, a connecting sleeve or other components.

[0035] Further, such as Figure 2 As shown, in some embodiments, a push rod 6 is further provided in the valve body 1, and the micro-displacement valve disc 3 is detachably connected to the float 4 via the push rod 6. The provision of the push rod 6 forms a detachable connection structure, which facilitates the disassembly, installation, maintenance, and replacement of components such as the float 4 and the micro-displacement valve disc 3.

[0036] In actual design, the push rod 6 can be detachably connected to the micro-displacement valve disc 3 or the float 4. Preferably, the push rod 6 is detachably connected to the micro-displacement valve disc 3 and the float 4. In addition, detachable connection solutions include but are not limited to threaded connection, screw connection, etc.

[0037] Further, such as Figure 2 As shown, in some embodiments, a micro-exhaust valve seat 7 is installed at the air inlet of the micro exhaust channel 100. The micro-exhaust valve seat 7 and the micro-exhaust valve disc 3 can form a micro-exhaust sealing pair to seal the air inlet. Further preferably, the micro-exhaust valve seat 7 is detachably connected to the air inlet.

[0038] Further, such as Figure 1 As shown, in some embodiments, in order to ensure the secure installation of the intake valve disc 2, a valve shaft 8 is provided in the valve body 1, and the upper end of the valve shaft 8 is elastically connected to the inside of the valve body 1 through an elastic member 9, and the intake valve disc 2 is sleeved and sealed on the lower end of the valve shaft 8.

[0039] In this design, the suction valve disc 2 is hoisted inside the valve body 1 through the valve shaft 8 and the elastic member 9, which not only prevents the elastic member 9 from rusting due to being immersed in the medium, but also facilitates debugging.

[0040] Of course, in other embodiments, the suction valve flap 2 can also be connected inside the valve body 1 by other connection schemes in the prior art, but it is necessary to meet the following conditions: when the pressure inside the valve does not reach the preset critical pressure value, the suction valve flap 2 and the valve body 1 form a normally closed mechanism, and when the pressure inside the valve reaches the preset critical pressure value, the suction valve flap 2 can be opened to perform suction of the valve. Generally, when the negative pressure generated inside the valve is ≤2kPa, the suction valve flap 2 is opened, and the valve body 1 performs suction.

[0041] Further, in some embodiments, when the suction valve flap 2 is installed by using the valve shaft 8, the upper end of the valve shaft 8 is preferably connected with a limiting structure that can be adjusted in the axial direction, which is in contact with the elastic member 9.

[0042] Under this design, by adjusting the limiting structure, the compression degree of the elastic member 9 can be adjusted, and then the critical pressure value inside the valve required for opening the suction valve flap 2 can be adjusted.

[0043] Further, as shown in Figure 1 the elastic member 9 is preferably a spring; the limiting structure includes a nut 12 and a spring sleeve 13, wherein the nut 12 is threadedly connected to the upper end of the valve shaft 8, the spring sleeve 13 is sleeved on the valve shaft 8, and the upper end of the spring sleeve 13 is in contact with the nut 12, and the lower end of the spring sleeve 13 is in contact with the spring. In other embodiments, in order to save parts, the spring sleeve 13 can also be omitted, and the nut 12 is directly in contact with the spring. In some embodiments, an open pin can also be provided at the top end of the valve shaft 8.

[0044] Further, the micro exhaust valve flap 3 can be connected to the lower part of the valve shaft 8 by a connecting member, so that the micro exhaust valve flap 3 is indirectly connected with the suction valve flap 2. Of course, the connecting member can also be selected to be directly installed on the lower end surface of the suction valve flap 2.

[0045] As shown in Figure 1 one embodiment, the connecting member is selected to be a connecting frame 5, which is sleeved on the lower end of the valve shaft 8, and the connecting frame 5 is connected to the lower end of the micro exhaust valve flap 3 by a nut and a gasket.

[0046] Further, the micro exhaust passage 100 can be formed in the valve shaft 8 or in the suction valve flap 2.

[0047] As shown in Figure 2In one embodiment shown, a micro-exhaust channel 100 is disposed within the valve shaft 8. The micro-exhaust channel 100 comprises a main channel 100-1 extending upward from the lower end surface of the valve shaft 8, and a plurality of branch channels 100-2 extending from the circumferential surface of the valve shaft 8 toward the axis. The branch channels 100-2 are located above the inlet valve disc 2 and communicate with the main channel 100-1. The lower opening of the main channel 100-1 serves as the inlet for the micro-exhaust channel 100, while the openings of the branch channels 100-2 located on the circumferential surface of the valve shaft 8 serve as the outlets.

[0048] Further, such as Figure 1 As shown, in some embodiments, the valve body 1 includes a main body 1-1, a valve cover 1-2 and a main valve seat 1-3.

[0049] The main body 1 - 1 has an inner cavity that passes through from top to bottom, a discharge port is provided at the circumferential side wall of the main body 1 - 1 , and a detachable plug 11 is installed at the outer end of the discharge port.

[0050] The valve cover 1-2 is mounted on the upper outer surface of the main body 1-1, and a sealing ring 14 is provided at the interface between the valve cover 1-2 and the main body 1-1. The upper end of the valve cover 1-2 has an orifice structure (i.e., a vent) that communicates with the inner cavity of the main body 1-1. The inner sidewall of the valve cover 1-2 protrudes inward to form a connecting arm. A guide sleeve 15 is mounted on the connecting arm at the center of the orifice structure. This guide sleeve 15 is used to guide the valve shaft 8 and support the elastic member 9.

[0051] The main valve seat 1-3 is mounted on the inner wall of the upper opening of the main body 1-1. A sealing ring 14 is disposed between the upper end of the main valve seat 1-3 and the valve cover 1-2. A vent is provided on the main valve seat 1-3, and the intake valve disc 2 can contact the main valve seat 1-3 to form a sealing pair, thereby closing the vent. Preferably, a sealing ring 14 is also connected to the upper end of the intake valve disc 2 to enhance the sealing effect between the intake valve disc 2 and the main valve seat 1-3.

[0052] Furthermore, the built-in micro-displacement gas injection valve further includes a valve cover 10, which is fixed to the upper end of the valve body 1 by means of studs 16. A filter screen 17 is provided circumferentially between the valve cover 10 and the valve cover 1-2.

[0053] Under this design, the suction valve disc 2 and the main valve seat 1-3 hardly contact water under normal operation. Therefore, the built-in micro-discharge air injection valve can also be used in sewage pipes.

[0054] The implementation principle of a built-in micro-discharge air injection valve in the embodiment of the present application is as follows: during normal water delivery, the float 4 uses buoyancy to drive the push rod 6 and the micro-discharge valve disc 3 to float up, so that the micro-discharge valve disc 3 is in contact with the micro-discharge valve seat 7, forming a micro-discharge sealing pair. As the gas in the water is released, the gas accumulates in the valve cavity of the valve body 1. The water level drops as the gas increases, causing the float 4, the push rod 6 and the micro-discharge valve disc 3 to drop, thereby causing the micro-discharge valve disc 3 to disengage from the micro-discharge valve seat 7, thereby achieving the conduction of the micro-exhaust channel 100. Then, the gas accumulated in the valve is discharged along the micro-exhaust channel 100, achieving micro-exhaust. Then, the water level rises as the gas is discharged, the float 4 rises and drives the micro-discharge valve disc 3 to be in contact with the micro-discharge valve seat 7 to close the micro-exhaust channel 100. This process can be repeated during the water delivery process to ensure the stability of the waterway.

[0055] It should be understood that expressions such as "include" and "may include" used in this application indicate the existence of the disclosed functions, operations, or constituent elements, and do not limit one or more additional functions, operations, and constituent elements. In this application, terms such as "include" and / or "have" may be interpreted as indicating a specific characteristic, number, operation, constituent element, component, or combination thereof, but may not be interpreted as excluding the existence or possibility of adding one or more other characteristics, numbers, operations, constituent elements, components, or combinations thereof.

[0056] It should be understood that the terms "center", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present application.

[0057] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of the technical features being referred to. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of the features. Throughout the description of this application, "plurality" means two or more, unless otherwise specifically defined.

[0058] In this application, unless otherwise clearly indicated and limited, the terms "mounting", "connection", "connecting", "fixing" and the like should be interpreted broadly, for example, can be fixed connection, can also be detachable connection, or integrally connected; can be mechanical connection, can also be electrical connection; can be directly connected, can also be indirectly connected through an intermediate medium, can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in this application can be understood according to the specific circumstances.

[0059] Those skilled in the art can understand that the above only describes the preferred embodiments of the present application, and is not intended to limit the present application. Any modifications, equivalent replacements and improvements made within the spirit and principle of the present application should be included in the protection scope of the present application.

Claims

1. A built-in micro-discharge gas injection valve, characterized in that: It comprises a valve body (1), wherein: A movable air intake valve flap (2) is installed in the valve body (1), and a micro exhaust channel (100) is provided in the inner cavity of the valve body (1) and passes through the upper and lower ends of the air intake valve flap (2); A movable micro-discharge valve flap (3) is provided in the valve body (1), the micro-discharge valve flap (3) is located below the air intake valve flap (2), and the micro-discharge valve flap (3) is connected to the air intake valve flap (2) via a connecting piece; A float (4) is provided in the valve body (1), and the float (4) is connected to the micro-exhaust valve flap (3). The float (4) can float and rise and fall with the change of the water level in the valve body (1), so as to drive the micro-exhaust valve flap (3) to open and close the micro-exhaust channel (100).

2. The built-in micro-discharge gas injection valve according to claim 1, characterized in that: The connecting piece includes a connecting frame (5) with a guide hole, the upper end of the micro-discharge valve flap (3) can abut against the outer end surface of the upper opening of the guide hole, and the lower end of the micro-discharge valve flap (3) passes through the guide hole and is connected to the float (4).

3. The built-in micro-discharge gas injection valve according to claim 1, characterized in that: A push rod (6) is provided in the valve body (1), and the micro-displacement valve flap (3) is detachably connected to the float (4) via the push rod (6).

4. The built-in micro-discharge gas injection valve according to claim 1, characterized in that: A micro-exhaust valve seat (7) is installed at the air inlet of the micro-exhaust channel (100), and the micro-exhaust valve seat (7) and the micro-exhaust valve flap (3) form a micro-exhaust sealing pair to seal the air inlet.

5. The built-in micro-discharge gas injection valve according to claim 4, characterized in that: The micro-valve seat (7) is detachably connected to the air inlet.

6. The built-in micro-displacement gas injection valve according to any one of claims 1 to 5, characterized in that: A valve shaft (8) is provided in the valve body (1), the upper end of the valve shaft (8) is elastically connected to the inside of the valve body (1) via an elastic member (9), and the air intake valve flap (2) is sleeved and fixed on the lower end of the valve shaft (8).

7. The built-in micro-discharge gas injection valve according to claim 6, characterized in that: The micro exhaust channel (100) is arranged in the valve shaft (8), and the micro exhaust channel (100) includes a main air channel (100-1) extending upward from the lower end surface of the valve shaft (8), and a plurality of branch air channels (100-2) extending from the circumferential surface of the valve shaft (8) toward the axis, wherein the branch air channels (100-2) are located above the inhalation valve disc (2) and communicate with the main air channel (100-1).

8. The built-in micro-discharge gas injection valve according to claim 6, characterized in that: The upper end of the valve shaft (8) is connected to a limiting structure that can be adjusted in axial displacement, and the limiting structure is in conflict with the elastic member (9).

9. The built-in micro-displacement gas injection valve according to any one of claims 1 to 5, characterized in that: The built-in micro-displacement gas injection valve further comprises a valve cover (10), wherein the valve cover (10) is fixedly arranged on the upper end of the valve body (1).

10. The built-in micro-displacement gas injection valve according to any one of claims 1 to 5, characterized in that: A discharge port is provided on the circumferential side wall of the valve body (1), and a detachable plug (11) is installed at the outer end of the discharge port.

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