Integrated zero-resistance check valve with turn-off function

Abstract

An integrated zero-resistance check valve with a turn-off function comprises a valve body, and a valve frame and a movable baffle rotationally connected along the valve frame are arranged in the valve body. The device further comprises a gear groove, a driving gear and a driven gear. The driven gear is arranged in the gear groove; the master gear is connected with the driving part, and the slave gear is meshed with the master gear, so that the slave gear is driven by the master gear to move from one end of the gear groove to the other end; the end, away from the main gear, of the auxiliary gear is provided with a stop block, the stop block extends in the opening direction of the movable baffle, and the stop block can be driven by the auxiliary gear to thoroughly cut off the movable baffle. On one hand, the resistance coefficient can be infinitely close to zero, on the other hand, the valve has a turn-off function, a turn-off valve does not need to be additionally arranged, and the resistance coefficient in a pipeline and the construction difficulty are greatly reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valve equipment, in particular to an integrated zero-resistance check valve with a shut-off function. Background Art

[0002] In traditional pipelines, a check valve and a shut-off valve are required at the water inlet end of the water pump. The core function of the check valve is to prevent material backflow and prevent the water pump and its driving motor from turning over; the function of the shut-off valve is to achieve connectivity and disconnection between circuits. In the actual design process, the resistance coefficients of the two valves in the system will affect the selection of the water pump, and thus affect the overall efficiency of the system; at the same time, in projects with tight machine room space, the difficulty of valve installation will increase exponentially. In order to solve the above problems, this application urgently needs to design a new type of check valve with a shut-off function. Utility Model Content

[0003] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and to provide an integrated zero-resistance check valve with a shut-off function.

[0004] The technical solution of the utility model is: an integrated zero-resistance check valve with a shut-off function, comprising a valve body, wherein a valve frame and a movable baffle rotatably connected along the valve frame are arranged in the valve body; further comprising a gear groove, a main gear and a slave gear; the slave gear is arranged in the gear groove; the main gear is connected to the driving part, and the slave gear is meshed with the main gear, so that the slave gear moves from one end of the gear groove to the other end under the drive of the main gear; the slave gear is provided with a stopper at the end away from the main gear, and the stopper extends in the direction of opening of the movable baffle, and the stopper can completely shut off the movable baffle under the drive of the slave gear.

[0005] Furthermore, the gear groove is a semicircular arc structure, the inner wall of the gear groove is provided with a groove for accommodating the slave gear, the groove of the gear groove is provided with a gap, a plurality of balls are connected in the gap, and the slave gear and the balls are in rolling contact.

[0006] Furthermore, the slave gear is an arc-shaped structure, and the arc length is 1 / 2 of the arc length of the gear groove, which is also equivalent to 1 / 4 of the arc length of the whole circle; the slave gear is adaptively connected to the groove, so that the slave gear can move along the ball in the groove, from 1 / 2 of the groove to the other 1 / 2 of the groove.

[0007] Furthermore, the main gear is located in the gear groove, the outer teeth of the main gear are meshed with the inner teeth of the slave gear, and the main gear is arranged in the middle of the gear groove, that is, at the lowest point of the semicircular arc.

[0008] Furthermore, the driving part is a rocker, and the valve body is provided with a connecting hole at a position opposite to the central hole of the main gear, so that the rocker located outside the valve body is connected to the main gear located inside the valve body through the connecting hole.

[0009] Furthermore, one of the two side walls corresponding to the gap on the groove of the gear groove is provided with an arc-shaped groove along the arc length direction of the gear groove, the arc length of the arc-shaped groove is 2 / 3 of the full circle, and the ball is placed in the arc-shaped groove.

[0010] Furthermore, the stopper is used to limit the maximum opening of the movable baffle, and the moving distance of the movable baffle controlled by the stopper to completely close is equal to the distance from the gear moving from 1 / 2 of the groove to the other 1 / 2 of the groove.

[0011] Furthermore, a rotating shaft is fixed on the valve frame, and the movable baffle is hinged to the rotating shaft and can be turned over within a range of 180 degrees along the rotating shaft.

[0012] Furthermore, the main structure of the valve body is rectangular, and the interfaces extending from both ends thereof are circular, and the overall design adopts a transition structure of the round sky and the square earth.

[0013] Furthermore, the gear groove is arranged on one side of the valve frame and is vertically arranged with respect to the valve frame.

[0014] Beneficial effects of the utility model:

[0015] (1) By setting a combination structure of a gear groove, a main gear and a slave gear, and setting a block on the slave gear, the check valve can have a shut-off function, so there is no need to set an additional shut-off valve, which greatly reduces the resistance coefficient in the pipeline and the construction difficulty;

[0016] (2) By designing the structure of the gear groove, the master gear and the slave gear are both located in the gear groove, and the slave gear can move within the gear groove along the hook groove of the gear groove. The structure is simple and compact, and does not occupy too much space of the check valve, so that the overall volume of the check valve can be designed to be smaller;

[0017] (3) By designing the check valve into a round-the-sky and square-the-earth fluid transition structure, compared with the traditional lift check valve, the flow direction of the fluid will not be changed, so the resistance coefficient can be infinitely close to zero; compared with the traditional plate check valve, the cross-sectional area at the movable baffle will not be reduced, and even when flowing through the valve body, the cross-sectional area will increase, so the resistance coefficient can be infinitely close to zero. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the external structure of the valve body of the utility model embodiment;

[0019] Figure 2 This is a schematic diagram of the internal structure of the valve body of the utility model embodiment;

[0020] Figure 3 This is a cross-sectional view of the internal structure of the valve body of the utility model embodiment;

[0021] Figure 4 This is a schematic diagram of the specific structure of the slave gear and the master gear in the gear groove of the embodiment of the utility model;

[0022] Figure 5 It is a schematic diagram of the structure of the contact between the gear and the ball in the embodiment of the utility model.

[0023] 1. Valve body; 2. Gear groove; 3. Main gear; 4. Slave gear; 5. Valve frame; 6. Rotating shaft; 7. Movable baffle; 8. Rocker; 9. Block; 11. Interface; 12. Connecting hole; 21. Groove; 22. Crack; 23. Ball; 24. Arc groove. DETAILED DESCRIPTION

[0024] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0025] like Figure 1~Figure 5 As shown: an integrated zero-resistance check valve with shutoff function, including a valve body 1, a gear slot 2, a main gear 3 and a slave gear 4. The main structure of the valve body 1 is rectangular, and the interfaces 11 extending from both ends are circular. The overall design adopts a transition structure of round heaven and square earth, so that when the fluid flows through the inside of the valve body, the cross-sectional area increases, and zero resistance can be achieved.

[0026] In this embodiment, a valve frame 5 is provided in the main body cavity of the valve body 1, a rotating shaft 6 is fixed on the valve frame 5, and a movable baffle 7 is hinged to the rotating shaft 6 and can be turned over within a range of 180° along the rotating shaft 6. Based on fluid dynamics and gravity, when the fluid flows in one direction, the movable baffle 7 opens under the pressure of the fluid to allow the fluid to pass; and when the fluid flows in the reverse direction, the movable baffle 7 closes under the pressure of the fluid and its own gravity, thereby preventing the fluid from flowing in the reverse direction to play a check function. The fluid flow direction in the valve body 1 is in the same direction, and the flow direction of the fluid will not be changed.

[0027] In this embodiment, the gear groove 2 is provided on one side of the valve frame 5, and the upper end of the gear groove 2 is fixedly connected to the valve body 1. That is, a certain space is left between the valve frame and the inner wall of the valve body to facilitate the arrangement of the gear groove. The gear groove 2 is a semicircular arc structure, wherein the inner wall of the gear groove 2 is provided with a groove 21 for accommodating the slave gear, and in addition, a slit 22 is provided on the groove of the gear groove, and a plurality of balls 23 are connected in the slit 22. The slave gear 4 is an arc structure, and the arc length is 1 / 2 of the arc length of the gear groove, which is also equivalent to 1 / 4 of the arc length of the whole circle. The slave gear 4 is adapted to be connected with the groove 21 and can move along the balls 23 in the groove 21. The reason why the arc length of the slave gear 4 is designed to be 1 / 2 of the arc length of the gear groove is that the slave gear 4 can move from one side of the gear groove 2 to the other side under the drive of the master gear 3, that is, from 1 / 2 of the groove 21 to the other 1 / 2 of the groove 21. During the movement of the slave gear 4, the slave gear 4 is in rolling contact with the ball 23 thereunder to reduce the frictional force of the slave gear sliding.

[0028] In this embodiment, the outer teeth of the master gear 3 mesh with the inner teeth of the slave gear 4, that is, the master gear 3 is located in the gear groove 2, and the master gear 3 is located in the middle of the gear groove 2, that is, at the lowest point of the semicircular arc, and meshes with the end of the slave gear there. The valve body 1 is provided with a connecting hole 12 at a position opposite to the central hole of the master gear, so that the rocker 8 located outside the valve body is connected to the master gear 3 located in the valve body through the connecting hole 12. By manually rotating the rocker 8, the master gear 3 can drive the slave gear 4 to move toward the other 1 / 2 groove of the gear groove 2.

[0029] It is understandable that the rocker in this embodiment may also be replaced by an electric drive, such as providing a motor to drive the main gear to rotate.

[0030] In the present embodiment, one of the two side walls corresponding to the gap 22 on the groove of the gear groove is provided with an arc-shaped groove 24 along the arc length direction of the gear groove, and the arc length of the arc-shaped groove 24 is 2 / 3 of the full circle. The ball 23 is placed in the arc-shaped groove 24, and by setting the arc length of the arc-shaped groove 24, the ball 23 can be prevented from moving out of the arc-shaped groove 24.

[0031] In this embodiment, the slave gear 4 is provided with a stopper 9 extending outward at the end away from the master gear 3, and the stopper 9 is in an L-shaped structure. The stopper 9 is used to limit the maximum opening of the movable baffle 7. When the movable baffle 7 is opened to the maximum, it will be blocked by the stopper 0. Therefore, the stopper 0 of this embodiment extends in the direction of opening of the movable baffle 7, and the side thereof that blocks the movable baffle 7 is set at 90 degrees to the slave gear 4. In addition to blocking the movable baffle, the stopper 9 also has the function of completely shutting off the movable baffle 7 under the drive of the slave gear 4. That is, after the movable baffle 7 is opened, in order to prevent the movable baffle 7 from not being completely closed when closing under the pressure of the fluid and its own gravity, the rocker 8 is manually rotated to make the driving wheel 3 drive the slave gear 4 to move toward the other 1 / 2 groove of the gear groove 2. At this time, the slave gear 4 will drive the block 9 to move in the direction of closing the movable baffle 7. When the slave gear 4 moves to the other 1 / 2 groove of the gear groove 2 and cannot move any further, the moving distance can just ensure that the block 9 drives the movable baffle 7 to move to the completely closed position, thereby achieving the purpose of closing.

[0032] In this embodiment, the design of the check valve can meet the installation requirements of horizontal and vertical pipelines. Considering the relationship between the opening and closing of the movable baffle and its own gravity, it is preferred to install the check valve horizontally to achieve a zero resistance effect.

[0033] In summary, compared with the traditional lift check valve, the check valve of this embodiment does not change the flow direction of the fluid, so the resistance coefficient can be infinitely close to zero; compared with the traditional plate check valve, it does not reduce the cross-sectional area of ​​the movable baffle, and even increases the cross-sectional area when flowing through the valve body, so the resistance coefficient can be infinitely close to zero. At the same time, the valve has a shut-off function, and there is no need to set up an additional shut-off valve, which greatly reduces the resistance coefficient in the pipeline and the difficulty of construction.

Claims

1. An integrated zero-resistance check valve with shutoff function, comprising a valve body, wherein a valve frame and a movable baffle rotatably connected along the valve frame are arranged in the valve body; characterized in that: It also includes a gear groove, a main gear and a slave gear; the slave gear is arranged in the gear groove; the main gear is connected to the driving part, and the slave gear is meshed with the main gear, so that the slave gear moves from one end of the gear groove to the other end under the drive of the main gear; the slave gear is provided with a stopper at the end away from the main gear, and the stopper extends in the direction of opening the movable baffle, and the stopper can completely close the movable baffle under the drive of the slave gear.

2. The integrated zero-resistance check valve with shutoff function according to claim 1, characterized in that: The gear groove is a semicircular arc structure, the inner wall of the gear groove is provided with a groove for accommodating the slave gear, the groove of the gear groove is provided with a slit, a plurality of balls are connected in the slit, and the slave gear is in rolling contact with the balls.

3. The integrated zero-resistance check valve with shutoff function according to claim 2 is characterized in that: The slave gear is an arc-shaped structure, and the arc length is 1 / 2 of the arc length of the gear groove, which is also equivalent to 1 / 4 of the arc length of the whole circle; The slave gear is adaptively connected to the groove, so that the slave gear can move along the ball in the groove, from 1 / 2 of the groove to the other 1 / 2 of the groove.

4. The integrated zero-resistance check valve with shutoff function according to claim 2 is characterized in that: The main gear is located in the gear groove, the outer teeth of the main gear are meshed with the inner teeth of the slave gear, and the main gear is arranged in the middle of the gear groove, that is, at the lowest point of the semicircular arc.

5. The integrated zero-resistance check valve with shutoff function according to claim 4, characterized in that: The driving part is a rocker, and the valve body is provided with a connecting hole at a position opposite to the central hole of the main gear, so that the rocker located outside the valve body is connected to the main gear located inside the valve body through the connecting hole.

6. The integrated zero-resistance check valve with shutoff function according to claim 2, characterized in that: One of the two side walls corresponding to the gap on the groove of the gear groove is provided with an arc-shaped groove along the arc length direction of the gear groove, the arc length of the arc-shaped groove is 2 / 3 of the full circle, and the ball is placed in the arc-shaped groove.

7. The integrated zero-resistance check valve with shutoff function according to claim 3, characterized in that: The stopper is used to limit the maximum opening of the movable baffle, and the moving distance of the movable baffle controlled by the stopper to completely close is equal to the distance from the gear moving from 1 / 2 of the groove to the other 1 / 2 of the groove.

8. The integrated zero-resistance check valve with shutoff function according to claim 1, characterized in that: A rotating shaft is fixed on the valve frame, and the movable baffle is hinged to the rotating shaft and can be turned over within a range of 180 degrees along the rotating shaft.

9. The integrated zero-resistance check valve with shutoff function according to claim 1, characterized in that: The main structure of the valve body is rectangular, and the interfaces extending from both ends thereof are circular, and the overall design adopts a transition structure of the round sky and the square earth.

10. The integrated zero-resistance check valve with shutoff function according to claim 1, characterized in that: The gear groove is arranged on one side of the valve frame and is vertically arranged with respect to the valve frame.

Images