An axial flow type automatic control valve

Abstract

The present invention discloses an axial flow automatic control valve, which includes: a valve body, a fixing member, and a driving structure. The fixing member is fixedly arranged in the cavity of the valve body, and a stepped hole facing the water inlet side is arranged on the fixing member; the valve flap is slidably arranged in the stepped hole; an elastic member is arranged in the stepped hole, one end of the elastic member is fixed on the fixing member, and the other end is fixed on the valve flap; wherein, the elastic member applies an elastic biasing force towards the water inlet to the valve flap. The valve stem is slidably inserted through the fixing member, and the valve stem is coaxially arranged with the stepped hole. Among them, the driving structure includes a driver and a driving part, and the driver and the driving part are electrically connected. By driving the driving part through the driver to drive the valve stem away from the valve flap or pressing the valve flap against the valve seat, the valve stem is automatically driven to press against the valve flap, eliminating the need for workers to manually control the valve stem.

Description

Technical Field

[0001] The present invention relates to the technical field of valve bodies, and particularly relates to an axial flow automatic control valve. Background Art

[0002] A valve is a pipeline accessory used to open and close pipelines, control the flow direction, and adjust and control the parameters (temperature, pressure, and flow rate) of the conveyed medium. According to its functions, it can be divided into a shut-off valve, a check valve, a regulating valve, etc.

[0003] In the prior art, in order to actively control the closing of the check valve and prevent the medium from pushing open the valve flap from the water inlet and flowing to the water outlet. The staff drives the threaded rod to move by rotating the handwheel, and the threaded rod presses against the valve flap to prevent the valve flap from being washed open by the medium, resulting in the medium flowing from the water inlet to the water outlet.

[0004] However, in the prior art, to control the closing of the check valve, it is necessary for the staff to manually control the valve rod, and it is impossible to automatically drive the valve rod to press against the valve flap. Summary of the Invention

[0005] Therefore, the technical problem to be solved by the present invention is to overcome the defect in the prior art that since it is necessary for the staff to manually control the valve rod, it is impossible to automatically drive the valve rod to press against the valve flap.

[0006] For this purpose, the present invention provides an axial flow automatic control valve, comprising:

[0007] A valve body and a fixing member arranged in the cavity of the valve body, and a stepped hole is formed on one side of the fixing member facing the water inlet;

[0008] A valve flap, slidably arranged in the stepped hole;

[0009] An elastic member, one end of which is fixed in the stepped hole and the other end is fixed on the valve flap; the elastic member applies an elastic biasing force towards the water inlet to the valve flap;

[0010] A valve rod, coaxially arranged with the stepped hole and slidably penetrating through the fixing member;

[0011] A driving structure, comprising:

[0012] A driver and a driving part; the driver and the driving part are electrically connected; the driving part is adapted to drive the valve rod away from the valve flap or press the valve flap against the valve seat.

[0013] Further, the driving part includes:

[0014] A gear installed in the fixing member, and a tooth groove formed on the surface of the valve rod that meshes with the gear and extends along the axial direction of the valve rod.

[0015] Furthermore, a guide sleeve is provided in the fixing member; the valve stem is slidably arranged in the guide sleeve; an avoidance hole is formed in one side of the guide sleeve corresponding to the tooth groove; the gear is engaged with the tooth groove through the avoidance hole.

[0016] Furthermore, a lubricating layer is coated on the valve stem and / or the guide sleeve.

[0017] Furthermore, the end face of the valve flap facing the water inlet is arc-shaped.

[0018] Furthermore, the valve stem includes a guide rod and a pressing end arranged at the end of the guide rod; the tooth groove is formed in the guide rod;

[0019] A acting portion is arranged on the side of the valve flap facing away from the water inlet corresponding to the pressing end.

[0020] Furthermore, the acting portion is a boss formed on the valve flap, and the contact surface between the boss and the pressing end is a plane;

[0021] The cross-sectional area of the pressing end is larger than the cross-sectional area of the guide rod.

[0022] Furthermore, a stepped groove is arranged on the outer ring of the valve flap corresponding to the fixing member.

[0023] Furthermore, when the valve flap is in sealed contact with the valve seat, the elastic biasing force is zero.

[0024] Furthermore, sealing members are respectively arranged on the contact surfaces of the valve flap and the valve seat corresponding to each other.

[0025] The technical solution of the present invention has the following advantages:

[0026] 1. The axial flow type automatic control valve provided by the present invention includes: a valve body, a fixing member and a driving structure. The fixing member is fixedly arranged in the cavity of the valve body, and a stepped hole facing the water inlet side is arranged on the fixing member; the valve flap is slidably arranged in the stepped hole; an elastic member is arranged in the stepped hole, one end of the elastic member is fixed on the fixing member, and the other end is fixed on the valve flap; wherein, the elastic member applies an elastic biasing force towards the water inlet to the valve flap. The valve stem is slidably penetrated in the fixing member, and the valve stem is coaxially arranged with the stepped hole. Among them, the driving structure includes a driver and a driving portion, and the driver and the driving portion are electrically connected. The driving portion drives the valve stem to disengage from the valve flap or presses the valve flap against the valve seat.

[0027] The axial-flow automatic control valve of this structure has the driver and the driving part electrically connected. The driving part is driven by the driver to drive the valve stem away from the valve flap or press the valve flap against the valve seat, realizing the automatic driving of the valve stem to press against the valve flap, and eliminating the need for staff to manually control the valve stem. At the same time, since the valve stem and the valve flap can be separated, the control function of the axial-flow check valve is realized, and the check valve sealing effect of the ordinary axial-flow check valve is retained.

[0028] 2. In the axial-flow automatic control valve provided by the present invention, a gear is arranged in the fixing part, and the gear meshes with the tooth groove axially extended on the valve stem. The gear is driven to rotate by the driver, further driving the valve stem to move axially, realizing the automatic driving of the valve stem to press against or away from the valve flap.

[0029] 3. In the axial-flow automatic control valve provided by the present invention, the end face of the valve flap facing the water inlet is arc-shaped, increasing the contact area between the valve flap and the medium, and ensuring that the medium can push open the valve flap.

[0030] 4. In the axial-flow automatic control valve provided by the present invention, a acting part is arranged corresponding to the pressing end on the side of the valve flap facing away from the water inlet. The acting part is a boss formed on the valve flap, and the contact surface between the boss and the pressing end is a plane, ensuring stable contact between the valve stem and the valve flap, further ensuring that the valve stem can stably push or press the valve flap, and preventing the valve stem and the valve flap from slipping and shifting during the process of the valve stem pressing the valve flap.

[0031] 5. In the axial-flow automatic control valve provided by the present invention, a stepped groove is arranged on the outer ring of the valve flap corresponding to the fixing part. The medium flowing from the water outlet to the water inlet can provide a thrust to the stepped groove of the valve flap, pressing the valve flap against the valve seat and ensuring the sealing between the valve flap and the valve seat.

[0032] 6. In the axial-flow automatic control valve provided by the present invention, when the valve flap is in sealed contact with the valve seat, the elastic biasing force applied by the elastic member to the valve flap is zero, ensuring that the medium at the water inlet can push open the valve flap under a relatively small thrust.

[0033] 7. In the axial-flow automatic control valve provided by the present invention, sealing members are respectively arranged on the contact surfaces corresponding to the valve flap and the valve seat, ensuring the sealing between the valve flap and the valve seat. Brief Description of the Drawings

[0034] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0035] Figure 1 It is a schematic cross-sectional view of the axial-flow automatic control valve in Embodiment 1 of the present invention;

[0036] Figure 2 Schematic cross-sectional view of the first state of the axial flow type automatic control valve in Embodiment 1 of the present invention;

[0037] Figure 3 Schematic cross-sectional view of the second state of the axial flow type automatic control valve in Embodiment 1 of the present invention;

[0038] Figure 4 Schematic cross-sectional view of the third state of the axial flow type automatic control valve in Embodiment 1 of the present invention.

[0039] Description of the reference numerals:

[0040] 1. Valve body; 2. Water inlet; 3. Water outlet; 4. Fixing member; 5. Guide sleeve; 6. Gear; 7. Valve stem; 8. Elastic member; 9. Valve flap; 10. Valve seat; 11. Retaining ring. Detailed implementation manners

[0041] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present invention, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0042] In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0043] In the description of the present invention, it should be noted that unless otherwise clearly defined and limited, the terms "installed", "connected" and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0044] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0045] Embodiment 1

[0046] This embodiment provides an axial flow automatic control valve, as Figure 1 shown, including: a valve body 1, a fixing member 4, and a driving structure. The fixing member 4 is fixedly arranged in the cavity of the valve body 1, and a stepped hole facing the water inlet 2 is arranged on the fixing member 4; the valve flap 9 is slidably arranged in the stepped hole; an elastic member 8 is arranged in the stepped hole, one end of the elastic member 8 is fixed on the fixing member 4, and the other end is fixed on the valve flap 9; wherein, the elastic member 8 applies an elastic biasing force towards the water inlet 2 to the valve flap 9, and the elastic member 8 can be a spring. The valve stem 7 is slidably inserted through the fixing member 4, and the valve stem 7 is coaxially arranged with the stepped hole. Among them, the driving structure includes a driver and a driving part, and the driver and the driving part are electrically connected. The driving part drives the valve stem 7 to disengage from the valve flap 9 or presses the valve flap 9 against the valve seat 10.

[0047] For the axial flow automatic control valve with this structure, the driver and the driving part are electrically connected. By driving the driving part through the driver, the valve stem 7 can be driven to disengage from the valve flap 9 or press the valve flap 9 against the valve seat 10, realizing the automatic driving of the valve stem 7 to press against the valve flap 9 without manual control of the valve stem 7 by the staff. At the same time, since the valve stem 7 and the valve flap 9 can be separated, both the control function of the axial flow check valve is realized, and the check valve sealing effect as an ordinary axial flow check valve is retained.

[0048] Specifically, as Figure 1 shown, the driving part includes a gear 6. The gear 6 is arranged in the fixing member 4, the gear 6 is connected to the driver, the driver can drive the gear 6 to rotate, and a tooth groove is arranged on the surface of the valve stem 7 along the axial direction of the valve stem 7. The gear 6 meshes with the tooth groove on the valve stem 7. That is to say, the driver drives the gear 6 to rotate, and the rotation of the gear 6 can drive the valve stem 7 meshing with the gear 6 to move, further realizing the automatic driving of the valve stem 7 to rotate and realizing the automatic driving of the valve stem 7 to press against or disengage from the valve flap 9.

[0049] Specifically, as Figure 1 shown, a guide sleeve 5 is arranged in the fixing member 4, and the valve stem 7 is slidably arranged in the guide sleeve 5. An avoidance hole is arranged on one side of the guide sleeve 5 close to the tooth groove, and the gear 6 is arranged near the avoidance hole. The gear 6 meshes with the tooth groove through the avoidance hole.

[0050] Specifically, as Figure 1 shown, the end face of the valve flap 9 facing the water inlet 2 is arc-shaped, increasing the contact area between the valve flap 9 and the medium, and ensuring that the medium at the water inlet 2 can push open the valve flap 9.

[0051] Specifically, as Figure 3 shown, a stepped groove is arranged on the outer circle of the valve flap 9 corresponding to the fixing member 4. The medium flowing from the water outlet 3 to the water inlet 2 can provide a thrust to the stepped groove of the valve flap 9, so that the valve flap 9 is pressed against the valve seat 10, ensuring the sealing between the valve flap 9 and the valve seat 10.

[0052] Specifically, the valve stem 7 includes a guiding rod and a pressing end provided at the end of the guiding rod, and the pressing end faces the valve flap. Among them, the tooth groove is formed on the guiding rod. A working portion is provided on the side of the valve flap 9 facing away from the water inlet corresponding to the pressing end, and the working portion is a boss formed on the valve flap, and the contact surface between the boss and the pressing end is a plane. The cross-sectional area of the pressing end is larger than that of the guiding rod. It can be understood that the radial diameter of the pressing end is larger than that of the guiding rod. Since the pressing end is large and is a flat surface, and the boss is also a plane, it ensures stable contact between the valve stem 7 and the valve flap 9, and further ensures that the valve stem 7 can stably push or press the valve flap 9, preventing the valve stem 7 and the valve flap 9 from slipping and shifting during the process of the valve stem 7 pressing the valve flap 9.

[0053] Specifically, as Figure 1 shown, sealing members are respectively provided on the contact surfaces of the valve flap 9 corresponding to the valve seat 10 to ensure the sealing performance between the valve flap 9 and the valve seat 10.

[0054] Specifically, when the valve flap 9 is in sealed contact with the valve seat 10, the elastic biasing force applied by the elastic member 8 to the valve flap 9 is zero, ensuring that the medium at the water inlet 2 can push open the valve flap 9 with a relatively small thrust.

[0055] Specifically, as Figure 1 shown, the valve seat 10 is arranged between the valve flap 9 and the retaining ring 11, and the valve seat 10 is fixed by the retaining ring 11 to prevent the valve seat 10 from falling off under the pressure of the valve flap 9.

[0056] When it is a common axial flow check valve, as Figure 2 shown, first, the driver drives the gear 6 to rotate counterclockwise, so that the valve stem 7 and the valve flap 9 are separated. When the medium flows from the water inlet 2 to the water outlet 3, the medium pushes the valve flap 9 to move away from the water inlet 2. At this time, the elastic member 8 is compressed, and the valve flap 9 and the valve seat 10 are separated, and the medium can flow from the water inlet 2 of the valve body 1 to the water outlet 3 of the valve body 1. As Figure 3 shown, when the medium flows from the water outlet 3 to the water inlet 2, the elastic member 8 applies a biasing force to the valve flap 9 in the direction of the water inlet 2, so that the valve flap 9 presses against the valve seat 10. At the same time, the medium provides a thrust to the stepped groove on the outer ring of the valve flap 9, so that the valve flap 9 presses against the valve seat 10, ensuring the sealing performance between the valve flap 9 and the valve seat 10 and ensuring that the medium cannot flow from the water outlet 3 to the water inlet 2.

[0057] When it is an axial flow automatic control valve, as Figure 4 shown, the driver drives the gear 6 to rotate, so that the gear 6 drives the valve stem 7 to move towards the valve flap 9, and further the valve stem 7 presses the valve flap 9 against the valve seat 10. At this time, the medium flows in from the water inlet 2. Since the valve stem 7 presses the valve flap 9, the medium cannot push open the valve flap 9, and thus the medium cannot flow from the water inlet 2 of the valve body 1 to the water outlet 3.

[0058] As the first alternative embodiment of Embodiment 1, since the valve stem 7 reciprocates within the guide sleeve 5, a lubricating layer can be coated on the valve stem 7 to prevent wear of the valve stem 7 caused by its movement within the guide sleeve 5.

[0059] As a variation, a lubricating layer can also be coated within the guide sleeve 5, or lubricating layers can be coated on both the guide sleeve 5 and the valve stem 7.

[0060] As the second alternative embodiment of Embodiment 1, the acting portion corresponding to the pressing end on the side of the valve flap 9 facing away from the water inlet 2 can be a sunken seat, and the pressing surface between the sunken seat and the valve stem 7 is a flat surface. This ensures that the valve stem 7 can stably push or press the valve flap 9, preventing slippage and offset between the valve stem 7 and the valve flap 9 during the process of the valve stem 7 pressing the valve flap 9.

[0061] Embodiment 2

[0062] This embodiment provides an axial flow automatic control valve. Compared with the axial flow automatic control valve provided in Embodiment 1, the difference lies in that the driving portion can be a telescopic rod, and the telescopic rod is connected to the valve stem 7. That is to say, by driving the telescopic rod to expand and contract through a driver to drive the valve stem 7 to reciprocate, it is also possible to achieve automatic driving of the valve stem 7 to disengage from the valve flap 9 or press the valve flap 9 against the valve seat 10.

[0063] Obviously, the above embodiments are merely examples given for clear illustration and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or variations can be made based on the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or variations derived therefrom are still within the protection scope of the present invention.

Claims

1. An axial flow type automatic control valve, characterized in that, Comprising: A valve body and a fixing member disposed in the cavity of the valve body, the fixing member having a stepped hole formed on the side facing the water inlet; A valve flap, slidably disposed in the stepped hole; An elastic member, one end of which is fixed in the stepped hole and the other end is fixed on the valve flap; The elastic member applies an elastic biasing force to the valve flap towards the water inlet; A valve stem, coaxial with the stepped hole and slidably passing through the fixing member; A driving structure, comprising: A driver and a driving portion; the driver and the driving portion are electrically connected; the driving portion is adapted to drive the valve stem away from the valve flap or press the valve flap against the valve seat; The driving portion includes: A gear installed in the fixing member, and a tooth groove formed on the surface of the valve stem and extending along the axial direction of the valve stem and meshing with the gear; A guide sleeve is provided in the fixing member; the valve stem is slidably disposed in the guide sleeve; an avoidance hole is formed on the side of the guide sleeve corresponding to the tooth groove; the gear meshes with the tooth groove through the avoidance hole; When the valve flap is in sealing contact with the valve seat, the elastic biasing force is zero.

2. The axial flow type automatic control valve according to claim 1, wherein A lubricating layer is coated on the valve stem and / or the guide sleeve.

3. The axial flow type automatic control valve according to claim 1, characterized in that, The end face of the valve flap facing the water inlet is arc-shaped.

4. The axial flow type automatic control valve according to claim 1, characterized in that, The valve stem includes a guide rod and a pressing end provided at the end of the guide rod; the tooth groove is formed on the guide rod; A acting portion is provided on the side of the valve flap facing away from the water inlet corresponding to the pressing end.

5. The axial flow type automatic control valve according to claim 4, characterized in that The acting portion is a boss formed on the valve flap, and the contact surface between the boss and the pressing end is a plane; The cross-sectional area of the pressing end is larger than the cross-sectional area of the guide rod.

6. The axial flow type automatic control valve according to any one of claims 1-5, characterized in that, A stepped groove is provided on the outer circle of the valve flap corresponding to the fixing member.

7. The axial flow type automatic control valve according to claim 1, wherein, Sealing members are respectively provided on the contact surfaces of the valve flap corresponding to the valve seat.

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