CN213451882U

CN213451882U - Flap type one-way valve

Info

Publication number: CN213451882U
Application number: CN202022354355.4U
Authority: CN
Inventors: 单文涛; 李巍; 莫超; 曾林
Original assignee: Yibin Sanjiang Machinery Co Ltd
Current assignee: Yibin Sanjiang Machinery Co Ltd
Priority date: 2020-10-21
Filing date: 2020-10-21
Publication date: 2021-06-15
Anticipated expiration: 2030-10-21

Abstract

The utility model discloses a board-like check valve turns over relates to valve structure technical field, and mainly used solves that current check valve can't satisfy opening pressure low, and the sealed problem that requires leaklessly of reverse minute-pressure. The main structure is as follows: the valve comprises a valve body, wherein a valve seat is inserted into one end of the valve body, and the other end of the valve body is connected with a flow passage outlet; the valve seat is of a tubular structure which is coaxial with the valve body, one end of the valve seat in the valve body is hinged with the valve, and the other end of the valve seat is connected with the runner inlet; the valve is hinged with one side of the end face of the valve seat through a hinge assembly. The utility model provides a pair of board-like check valve turns over, its structure is ingenious, and opening pressure is low, and reverse minute-pressure leakproofness is good, simultaneously, still has the advantage that stable performance is reliable, long service life.

Description

Flap type one-way valve

Technical Field

The utility model relates to a valve structure technical field especially relates to a board-like check valve turns over.

Background

In each system on an airplane, in order to control the unidirectional flow of fluid in the system and prevent the backflow, a check valve is often required to be arranged in the system to cooperate with the control of the flow direction of the fluid. Furthermore, the technical requirements of the check valves installed in different parts of the aircraft are different. Wherein, the one-way valve of part of the airplane system requires that the opening pressure is low and the reverse micro-pressure sealing is not leak.

However, the check valve of the present structure has difficulty in satisfying both of the above requirements.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a board-like check valve turns over, its structure is ingenious, and opening pressure is low, and reverse minute-pressure leakproofness is good.

The utility model provides a technical scheme of above-mentioned technical problem is: a flap type check valve comprises a valve body with a tubular structure, wherein a valve seat in sealing fit with the valve body is inserted into one end of the valve body, and the other end of the valve body is coaxially connected with a flow passage outlet; the valve seat is of a tubular structure which is coaxial with the valve body, one end of the valve seat in the valve body is hinged with a valve which can be opened/closed along the flow direction of fluid, and the other end of the valve seat is coaxially connected with a flow channel inlet; the valve is hinged with one side of the end face of the valve seat through a hinge assembly capable of driving the valve to close and reset.

As a further improvement, the hinge assembly includes a hinge lug arranged on one side of the valve seat end surface, a hinge pin is rotatably arranged on the hinge lug and is connected with the valve through a hinge, a torsional spring is further sleeved on the hinge pin, and the valve seat end surface and the hinge are respectively propped at the two ends of the torsional spring.

As a further improvement, the one end of the hinge close to the inner wall of the valve body is provided with a raised limit part, and the other end extends to the valve to be away from one side of the valve seat and connected with the valve.

As a further improvement of the utility model, the valve is equipped with the installation department that supplies the hinge to pass keeping away from disk seat one side, be equipped with self-locking nut on the installation department.

As a further improvement of the present invention, the valve seat is located on the end face of one end in the valve body and is further provided with a guide step which is arranged along the edge of the valve and the inner diameter of which is gradually enlarged along the direction from the valve seat to the valve.

As a further improvement, the end face of the valve seat is provided with a concave hole for fixing the end part of the torsion spring.

As a further improvement of the present invention, the valve seat and the valve body are connected by a screw thread, and a seal ring disposed around the axis of the valve seat is further provided between the valve seat and the valve body.

As a further improvement of the present invention, the valve is provided with a sealing gasket ring arranged around the outlet of the valve seat on the contact surface with the valve seat.

As a further improvement of the present invention, the valve is provided with a recess corresponding to the outlet of the valve seat facing one side of the valve seat.

As a further improvement of the present invention, the inner diameter of the flow channel inlet is the same as the inner diameter of the flow channel outlet; the inner diameter of the inlet of the flow passage is smaller than that of the outlet of the valve seat; the inner diameter of the outlet of the valve seat is smaller than the inner diameter of the middle part of the valve seat.

Advantageous effects

Compared with the prior art, the utility model discloses a board-like check valve turns over's advantage does:

1. the utility model discloses in, including tubular structure's valve body, it has rather than sealed complex disk seat to peg graft in the one end of valve body, and other end coaxial coupling has the runner export. The valve seat is a tubular structure which is coaxial with the valve body, one end of the valve seat in the valve body is hinged with a valve which can be opened/closed along the flow direction of fluid, and the other end of the valve seat is coaxially connected with a runner inlet. The valve is hinged with one side of the end surface of the valve seat through a hinge assembly capable of driving the valve to close and reset. When the valve is used, fluid enters the valve seat from the inlet of the flow channel, directly washes the valve and is output from the outlet of the flow channel at the outlet end of the valve body. Because the valve is hinged, the valve can be opened by only small fluid pressure, and the opening pressure of the valve seat is low. Meanwhile, when fluid is not input into the device any more, the valve can be reset and closed under the driving of the hinge assembly, the aim of reversely micro-pressing the outlet end of the valve seat by the valve is fulfilled, and the sealing performance is good. In addition, because the channel inlet, the channel of the valve seat, the channel of the valve body and the channel outlet are designed by equal channels, after the valve is opened at a certain angle, the formed channel is open, the size of the effective channel is consistent with that of the pipeline channel, the channel has no turning and throttling, the pressure loss of the internal channel is reduced, and the large flow and the low flow resistance can be realized.

2. The hinge assembly comprises a hinge lug arranged on one side of the end face of the valve seat, a hinge pin is rotatably arranged on the hinge lug and is connected with the valve through a hinge, a torsion spring is further sleeved on the hinge pin, and two ends of the torsion spring respectively support against the end face of the valve seat and the hinge. The torsion spring provides initial sealing force and resetting force of the valve, and the valve is pressed on the sealing surface of the valve seat to form sealing. The magnitude of the elastic force is adjusted by controlling the torsion angle of the torsion spring, so that the low-pressure opening of the valve can be realized, and the lowest pressure can reach 0.5 kPa.

3. One end of the hinge, which is close to the inner wall of the valve body, is provided with a raised limiting part, and the other end of the hinge extends to one side of the valve, which is far away from the valve seat, and is connected with the valve. The limiting part is arranged at one end of the hinge of the valve, so that the maximum opening degree of the valve when the valve is opened can be ensured not to exceed the limit allowable angle of the torsion spring, the torsion spring is prevented from being damaged, and the performance of the product is ensured to be stable and reliable.

4. The valve is equipped with the installation department that supplies the hinge to pass keeping away from disk seat one side, is equipped with the self-locking nut on the installation department. The existence of the self-locking nut can prevent the end part of the hinge from falling off from the installation part, so that the valve and the hinge are stably connected. Meanwhile, the end face of the valve seat, which is positioned at one end in the valve body, is also provided with a guide step which is arranged along the edge of the valve and the inner diameter of which is gradually enlarged along the direction from the valve seat to the valve. When the end part of the hinge penetrates through the installation part, a certain gap exists between the hinge and the valve, namely, the hinge and the valve have a certain gap, the hinge can swing for a certain displacement relative to the valve and is in flexible connection, and the hinge is matched with a guide step with a guide function, so that the automatic alignment function of the valve can be realized, and the sealing performance of the valve is compensated.

5. Be equipped with the shrinkage pool that is used for fixed torsional spring tip on the terminal surface of disk seat. Shrinkage pool and torsional spring tip cooperation can fix the torsional spring, avoids the displacement to appear in the torsional spring, influences the stable function of whole device.

6. The valve seat is in threaded connection with the valve body, and a sealing ring arranged around the axis of the valve seat is further arranged between the valve seat and the valve body. The sealing ring is matched with the thread connection, so that the sealing property between the valve seat and the valve body is ensured to the maximum extent.

7. The valve is provided with a sealing gasket ring arranged around the outlet of the valve seat on the contact surface of the valve and the valve seat. The sealing gasket ring can ensure the requirements of stability and sealing performance of the flap-type check valve, and further meets the requirement of no leakage of reverse micro-pressure sealing.

8. The valve is provided with a groove corresponding to the outlet of the valve seat on one side facing the valve seat, and the groove is needed to guide the impact force of fluid to avoid the impact force dispersion to influence the opening of the valve because the valve is opened under low pressure.

The invention will become more apparent from the following description when taken in conjunction with the accompanying drawings which illustrate embodiments of the invention.

Drawings

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

FIG. 1 is a cross-sectional view of the present invention;

fig. 2 is a schematic structural diagram of the hinge assembly of the present invention.

Wherein: 1-a valve seat; 11-channel inlet; 12-a hinge ear; 2-sealing ring; 3-a hinge; 31-a limiting part; 4-a valve; 41-sealing gasket ring; 42-a projection; 5-self-locking nut; 6-a pin shaft; 7-torsion spring; 8-a valve body; 81-flow channel outlet.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings. It is to be understood that the embodiments described are only some embodiments of the invention, and not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Embodiments of the present invention will now be described with reference to the accompanying drawings.

Examples

The utility model discloses a specific embodiment is shown in fig. 1-2, a board-like check valve turns over, including tubular structure's valve body 8, it has rather than sealed complex disk seat 1 to peg graft in one end of valve body 8, and other end coaxial coupling has runner export 81. The valve seat 1 is a tubular structure arranged coaxially with the valve body 8. One end of the valve body 8 is hinged with a valve 4 which can be opened/closed along the flow direction of the fluid, and the other end is coaxially connected with a flow channel inlet 11. The valve 4 is hinged with one side of the end surface of the valve seat 1 through a hinge assembly capable of driving the valve to close and reset.

In use, fluid enters the valve seat 1 from the fluid inlet 11, directly impacts the valve 4 and is output from the fluid outlet 81 at the outlet end of the valve body 8. Because the valve 4 is hinged, the valve 4 can be opened by only small fluid pressure, and the opening pressure of the valve seat 1 is low. Meanwhile, when the fluid is not input into the device any more, the valve 4 can be reset and closed under the driving of the hinge assembly, the aim of reversely micro-pressing the outlet end of the valve seat 1 by the valve 4 is fulfilled, and the sealing performance is good. In addition, because the flow channel inlet 11, the channel of the valve seat 1, the channel of the valve body 8 and the flow channel outlet 81 adopt equal channel design, after the valve 4 is opened at a certain angle, the formed flow channel is open, the size of the effective flow channel is consistent with that of the pipeline channel, the flow channel has no turning and throttling, the pressure loss of the internal flow channel is reduced, and the high flow rate and the low flow resistance can be realized.

Wherein, regarding the concrete structure of the hinge assembly, the hinge assembly comprises a hinge lug 12 arranged on one side of the end surface of the valve seat 1. The hinge lug 12 is rotatably provided with a pin shaft 6, and the pin shaft 6 is connected with the valve 4 through a hinge 3. The pin shaft 6 is further sleeved with a torsion spring 7, and two ends of the torsion spring 7 respectively support against the end face of the valve seat 1 and the hinge 3. The torsion spring 7 provides initial sealing force and resetting force of the valve 4, and the valve 4 is pressed on the sealing surface of the valve seat 1 to form sealing. The magnitude of the elastic force is adjusted by controlling the torsion angle of the torsion spring 7, so that the low-pressure opening of the valve 4 can be realized, and the lowest pressure can reach 0.5 kPa.

In this embodiment, one end of the hinge 3 close to the inner wall of the valve body 8 is provided with a raised limiting portion 31, and the other end extends to one side of the valve 4 far away from the valve seat 1 and is connected with the valve 4. The limiting part 31 is arranged at one end of the hinge 3 of the valve 4, so that the maximum opening degree of the valve when opened can be ensured not to exceed the limit allowable angle of the torsion spring 7, the torsion spring 7 is prevented from being damaged, and the product performance is ensured to be stable and reliable.

The valve 4 is provided with a mounting portion 42 on a side away from the valve seat 1 for the hinge 3 to pass through, and the mounting portion 42 is provided with a self-locking nut 5. The self-locking nut 5 can prevent the end part of the hinge 3 from falling off from the mounting part 42, so that the connection between the valve 4 and the hinge 3 is stable.

In this embodiment, the end surface of the valve seat 1 at one end inside the valve body 8 is further provided with a guiding step 13 which is arranged along the edge of the valve 4 and has an inner diameter gradually expanding along the direction from the valve seat 1 to the valve 4. This is because there is a certain gap between the hinge 3 and the shutter 4 when the end of the hinge 3 passes through the mounting portion 42. Therefore, the hinge 3 can swing at a certain displacement relative to the valve 4, is in flexible connection, is matched with the guide step 13 with a guide effect, can realize the automatic alignment function of the valve 4, compensates the tightness of the valve 4, ensures the accurate resetting of the valve 4 and keeps the sealing effect.

Simultaneously, be equipped with the shrinkage pool that is used for fixed torsional spring 7 tip on the terminal surface of disk seat 1. Shrinkage pool and the 7 tip cooperations of torsional spring can fix torsional spring 7, avoid torsional spring 7 to appear the displacement, influence the stable function of whole device.

The valve seat 1 is in threaded connection with the valve body 8, and a sealing ring 2 arranged around the axis of the valve seat 1 is further arranged between the valve seat 1 and the valve body. The sealing ring 2 is matched with the thread connection, so that the sealing performance between the valve seat 1 and the valve body 8 is ensured to the maximum extent.

In addition, the shutter 4 is provided with a gasket ring 41 disposed around the outlet of the valve seat 1 on the contact surface with the valve seat 1. The material of the gasket ring 41 is vulcanized rubber. The sealing gasket ring 41 can ensure the requirements of stability and sealing performance of the flap-type check valve, and further meet the requirement of no leakage of reverse micro-pressure sealing.

The shutter 4 is provided with a groove corresponding to the outlet of the valve seat 1 on the side facing the valve seat 1. This is because to ensure that the valve 4 is opened at low pressure, a groove is required to guide the impact force of the fluid, so as to avoid the impact force from dispersing and affecting the opening of the valve 4.

It should be noted that:

the inner diameter of the flow channel inlet 11 in this embodiment is the same as the inner diameter of the flow channel outlet 81; the inner diameter of the flow channel inlet 11 is smaller than the inner diameter of the outlet of the valve seat 1; the inner diameter of the outlet of the valve seat 1 is smaller than the inner diameter of the middle part of the valve seat 1.

The present invention has been described above with reference to the preferred embodiments, but the present invention is not limited to the above-disclosed embodiments, and various modifications, equivalent combinations, which are made according to the essence of the present invention, should be covered.

Claims

1. A flap type check valve is characterized by comprising a valve body (8) with a tubular structure, wherein a valve seat (1) in sealing fit with the valve body (8) is inserted into one end of the valve body (8), and the other end of the valve body is coaxially connected with a flow passage outlet (81); the valve seat (1) is of a tubular structure which is coaxial with the valve body (8), one end of the valve seat positioned in the valve body (8) is hinged with a valve (4) which can be opened/closed along the flow direction of fluid, and the other end of the valve seat is coaxially connected with a runner inlet (11); the valve (4) is hinged with one side of the end surface of the valve seat (1) through a hinge assembly capable of driving the valve to close and reset.

2. The flap type check valve according to claim 1, wherein the hinge assembly comprises a hinge lug (12) arranged on one side of the end surface of the valve seat (1), the hinge lug (12) is rotatably provided with a pin shaft (6), the pin shaft (6) is connected with the valve (4) through a hinge (3), the pin shaft (6) is further sleeved with a torsion spring (7), and two ends of the torsion spring (7) respectively support against the end surface of the valve seat (1) and the hinge (3).

3. A flap-type check valve according to claim 2, characterized in that one end of the hinge (3) close to the inner wall of the valve body (8) is provided with a raised limiting portion (31), and the other end extends to one side of the valve (4) far away from the valve seat (1) and is connected with the valve (4).

4. A flap-type check valve according to claim 3, characterized in that the shutter (4) is provided with a mounting portion (42) for the hinge (3) to pass through on the side away from the valve seat (1), and the mounting portion (42) is provided with a self-locking nut (5).

5. A flap check valve according to claim 4, characterized in that the end surface of the valve seat (1) at the inner end of the valve body (8) is further provided with a guide step (13) which is arranged along the edge of the valve (4) and has an inner diameter gradually enlarged along the direction from the valve seat (1) to the valve (4).

6. A flap-type check valve according to claim 2, characterized in that the end surface of the valve seat (1) is provided with a concave hole for fixing the end of the torsion spring (7).

7. A flap-type non-return valve according to claim 1, characterized in that the valve seat (1) and the valve body (8) are in threaded connection, and a sealing ring (2) arranged around the axis of the valve seat (1) is arranged between the two.

8. A flap-type non return valve according to claim 1, characterized in that the shutter (4) is provided with a gasket ring (41) around the outlet of the valve seat (1) at the contact surface with the valve seat (1).

9. Flap-type non return valve according to claim 1, characterized in that the flap (4) is provided with a recess corresponding to the outlet of the valve seat (1) on the side facing the valve seat (1).

10. Flap-type non return valve according to claim 1, characterized in that the inner diameter of the flow channel inlet (11) is the same as the inner diameter of the flow channel outlet (81); the inner diameter of the flow channel inlet (11) is smaller than that of the outlet of the valve seat (1); the inner diameter of the outlet of the valve seat (1) is smaller than the inner diameter of the middle part of the valve seat (1).