Novel flue check valve

Abstract

The utility model discloses a novel flue check valve, which relates to the field of flue check valves, and comprises a valve seat, a valve casing is integrally formed on the valve seat, sealing covers are symmetrically mounted in the valve casing, the sealing covers are rotatably connected with the valve casing, a positioning frame is further fixedly mounted in the valve casing, and the positioning frame is fixedly connected with the valve casing. Pressing and holding frames for pressing and holding the sealing cover are symmetrically arranged on the positioning frame, and the middle portions of the pressing and holding frames are rotationally connected with the positioning frame. According to the utility model, the positioning frame is arranged in the valve shell, and the pressing and holding frame is arranged on the positioning frame, so that the sealing cover can be stably supported by the pressing and holding frame during use, and the sealing cover is closed by the pressing and holding frame under the action of the elastic lifting frame when no air passes through the valve shell; and when wind passes through, the sealing cover can overcome the elastic force of the tension spring to turn over and open the sealing cover.

Description

Technical Field

[0001] The utility model relates to the technical field of flue check valves, in particular to a novel flue check valve. Background Art

[0002] The commonly used flue check valve is a double valve flap structure, which mainly includes a valve body with a circular hole channel and two semicircular valve flaps symmetrically arranged in the circular hole channel. A rotating shaft is arranged on both sides of each valve flap to be movably engaged with the holder in the circular hole channel. The circular hole channel is provided with a connecting shaft at the junction of the two valve flaps, and a torsion spring is arranged in the middle of the connecting shaft. The two ends of the torsion spring are respectively clamped on the back of the valve flap to keep the two valve flaps in a normally closed state. In use, when the range hood is turned on, the air pressure in the flue increases to overcome the torsion of the torsion spring and open the two valve flaps to exhaust the oil smoke.

[0003] With respect to the above-mentioned related technologies, it is found that the valve flap of the existing flue check valve is closed by the torsion of the torsion spring, and the torsion of the torsion spring is determined at the factory and cannot be adjusted according to specific installation requirements during installation. Utility Model Content

[0004] The present application provides a novel flue check valve for solving the problems raised in the background technology.

[0005] The utility model is achieved in this way:

[0006] A new type of flue check valve comprises a valve seat, a valve shell is integrally formed on the valve seat, a sealing cover is symmetrically installed in the valve shell, the sealing cover is rotatably connected to the valve shell, a positioning frame is also fixedly installed in the valve shell, a holding frame for holding the sealing cover is symmetrically arranged on the positioning frame, the middle part of the holding frame is rotatably connected to the positioning frame, a guide seat is fixedly installed in the positioning frame, an elastic lifting frame is slidably installed at the lower end of the guide seat, the lower end of the elastic lifting frame is connected to the head of the holding frame, and an adjusting screw for adjusting the height of the elastic lifting frame is also installed on the guide seat.

[0007] Furthermore, the positioning frame includes a frame shell, a lower cover and a bracket, both ends of the frame shell are fixedly installed in the valve shell, the lower cover is fixedly installed on the lower end surface of the frame shell, and the bracket is symmetrically fixed on the lower end surface of the frame shell.

[0008] Furthermore, the pressing frame includes a swing rod and a pressing roller, the head of the swing rod is provided with a connecting shaft connected to the elastic lifting frame, and the pressing roller is fixedly installed at the end of the swing rod.

[0009] Furthermore, the guide seat includes a seat shell and a top frame, the top frame is arranged on the upper end surface of the seat shell, and the top frame and the seat shell are integrally formed.

[0010] Furthermore, a slide groove is provided in the middle of the lower end surface of the seat shell for the elastic lifting frame to be slidably installed, and a threaded sleeve threadably connected to the adjusting screw is provided at the center of the upper end surface of the seat shell.

[0011] Furthermore, the elastic lifting frame includes a lifting seat, a guide rod, a tension spring and a slider, the lower end of the tension spring is fixedly installed at the center of the upper end surface of the lifting seat, the guide rod is slidably installed in the seat shell, and the lower end of the guide rod is fixed on the lifting seat, the slider is fixed to the head of the tension spring, and the slider is rotatably connected to the head of the adjusting screw.

[0012] Furthermore, the lifting seat includes a middle frame and a horizontal shell for installing the connecting shaft. The horizontal shell is symmetrically arranged at both ends of the middle frame, and the horizontal shell is fixedly connected to the middle frame.

[0013] Compared with the prior art, the utility model has the following beneficial effects: the utility model provides a positioning frame in the valve housing and installs a holding frame on the positioning frame. When it is easy to use, the sealing cover can be stably supported by the holding frame. When there is no wind passing through the valve housing, the holding frame closes the sealing cover under the action of the elastic lifting frame. When there is wind passing through, the sealing cover can overcome the elastic force of the tension spring and flip it open. When installed in different environments, the stretching length of the tension spring can be adjusted by rotating the adjusting screw according to actual needs, thereby changing the pulling force on the holding frame, so that the holding frame can hold the sealing cover with different forces. The utility model has the advantages of easy adjustment and convenient meeting different usage requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solution of the implementation mode of the utility model, the drawings required for use in the implementation mode will be briefly introduced below. It should be understood that the following drawings only show certain embodiments of the utility model and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying creative work.

[0015] Figure 1 It is a three-dimensional diagram of the overall structure in the embodiment of the utility model;

[0016] Figure 2 yes Figure 1 a bottom view of the device shown;

[0017] Figure 3 It is a schematic diagram of the exploded structure of the overall structure in the embodiment of the utility model;

[0018] Figure 4 yes Figure 3 A schematic diagram of the exploded structure of the positioning frame, the holding frame, the guide seat and the elastic lifting frame of the device shown;

[0019] Figure 5 yes Figure 4 a front view of the device shown;

[0020] Figure 6 yes Figure 4 A three-dimensional diagram of the guide seat and the elastic lifting frame cooperating with each other;

[0021] Figure 7 yes Figure 6 a side view of the device shown;

[0022] Figure 8 yes Figure 6 Front view of the device shown.

[0023] In the figure: 1. valve seat; 2. valve shell; 3. sealing cover; 4. positioning frame; 41. frame shell; 42. lower cover; 43. bracket; 5. holding frame; 51. rocker arm; 511. connecting shaft; 52. pressure roller; 6. guide seat; 61. seat shell; 611. slide groove; 612. threaded sleeve; 62. top frame; 7. elastic lifting frame; 71. lifting seat; 711. middle frame; 712. horizontal shell; 72. guide rod; 73. tension spring; 74. slider; 8. adjusting screw. DETAILED DESCRIPTION

[0024] In order to make the purpose, technical scheme and advantages of the embodiments of the utility model clearer, the technical scheme in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model. Therefore, the following detailed description of the embodiments of the utility model provided in the drawings is not intended to limit the scope of the utility model for which protection is claimed, but merely represents the selected embodiments of the utility model.

[0025] Reference Figure 1 , Figure 2 and Figure 3As shown, a new type of flue check valve comprises a valve seat 1, on which a valve shell 2 is integrally formed, a sealing cover 3 is symmetrically installed in the valve shell 2, and the sealing cover 3 is rotatably connected to the valve shell 2. A positioning frame 4 is also fixedly installed in the valve shell 2, and a holding frame 5 for holding the sealing cover 3 is symmetrically arranged on the positioning frame 4. The middle part of the holding frame 5 is rotatably connected to the positioning frame 4. A guide seat 6 is fixedly installed in the positioning frame 4, and an elastic lifting frame 7 is slidably installed at the lower end of the guide seat 6. The lower end of the elastic lifting frame 7 is connected to the head of the holding frame 5, and an adjusting screw 8 for adjusting the height of the elastic lifting frame 7 is also installed on the guide seat 6. The valve seat 1 is arranged to facilitate the stable installation and use of the check valve. At the same time, the positioning frame 4 is fixedly installed in the valve housing 2, so that the holding frame 5 and the guide seat 6 can be installed through the positioning frame 4, and the elastic lifting frame 7 can be slidably installed through the guide seat 6. When it is easy to use, the holding frames 5 at both ends can be driven by the elastic lifting frame 7 to stably hold the sealing cover 3, so that the sealing cover 3 can seal and cover the middle part of the valve housing 2, and the height of the elastic lifting frame 7 can be adjusted by adjusting the setting of the screw rod 8, thereby achieving the purpose of changing the holding force of the holding frame 5.

[0026] Reference Figure 3 and Figure 5 As shown, the positioning frame 4 includes a frame shell 41, a lower cover 42 and a bracket 43. Both ends of the frame shell 41 are fixedly installed in the valve housing 2, the lower cover 42 is fixedly installed on the lower end surface of the frame shell 41, and the bracket 43 is symmetrically fixed on the lower end surface of the frame shell 41. The structural setting of the positioning frame 4 ensures that the lower cover 42 is fixedly installed on the frame shell 41, and the bracket 43 can be installed through the lower cover 42 when it is easy to use, so that the bracket 43 supports the holding frame 5, and ensures that the holding frame 5 can be stably flipped for use.

[0027] Reference Figure 4 and Figure 5 As shown, the pressing frame 5 includes a swing rod 51 and a pressure roller 52. The head of the swing rod 51 is provided with a connecting shaft 511 connected to the elastic lifting frame 7. The pressure roller 52 is fixedly installed at the end of the swing rod 51. The structural setting of the pressing frame 5 ensures that the pressure roller 52 is fixedly installed on the swing rod 51, so that the sealing cover 3 can be pressed by the pressure roller 52 when in use. At the same time, the setting of the connecting shaft 511 facilitates the connection with the elastic lifting frame 7, and it is easy to drive the pressing frame 5 to rotate through the elastic lifting frame 7.

[0028] Reference Figure 6 , Figure 7 and Figure 8As shown, the guide seat 6 includes a seat shell 61 and a top frame 62, the top frame 62 is arranged on the upper end surface of the seat shell 61, and the top frame 62 and the seat shell 61 are integrally formed. A slide groove 611 is provided in the middle of the lower end surface of the seat shell 61 for the elastic lifting frame 7 to slide and install, and a threaded sleeve 612 threadedly connected with the adjusting screw 8 is provided at the center of the upper end surface of the seat shell 61. The top frame 62 is provided at the upper end of the seat shell 61 by the structural setting of the guide seat 6, and it can be fixed in the frame shell 41 by the top frame 62 when it is easy to install. At the same time, the slide groove 611 is provided in the middle of the lower end surface of the seat shell 61 to facilitate the stable sliding installation of the elastic lifting frame 7, and the threaded sleeve 612 is provided to ensure that the adjusting screw 8 is installed, and the use height of the elastic lifting frame 7 can be changed by rotating the adjusting screw 8 when it is easy to use.

[0029] Reference Figure 6 , Figure 7 and Figure 8 As shown, the elastic lifting frame 7 includes a lifting seat 71, a guide rod 72, a tension spring 73 and a slider 74. The lower end of the tension spring 73 is fixedly installed at the center of the upper end surface of the lifting seat 71. The guide rod 72 is slidably installed in the seat shell 61, and the lower end of the guide rod 72 is fixed on the lifting seat 71. The slider 74 is fixed to the head of the tension spring 73, and the slider 74 is rotatably connected to the head of the adjusting screw 8. The structural setting of the elastic lifting frame 7 ensures that the lifting seat 71 can be slidably installed in the seat shell 61 through the guide rod 72, and the setting of the tension spring 73 and the slider 74 ensures that the lifting seat 71 is stretched upward, and then the head of the swing rod 51 can be turned up through the lifting seat 71. The lifting seat 71 includes a middle frame 711 and a horizontal shell 712 for mounting the connecting shaft 511. The horizontal shell 712 is symmetrically arranged at both ends of the middle frame 711, and the horizontal shell 712 is fixedly connected to the middle frame 711. By setting the structure of the lifting seat 71, it is ensured that the horizontal shells 712 are set at both ends of the middle frame 711, so that the swing rod 51 can be turned up through the horizontal shells 712 at both ends.

[0030] Working principle: During the actual installation, the operator can adjust the use height of the elastic lifting frame by turning the adjusting screw, thereby changing the stretching height of the tension spring, while the angle at which the holding frame supports the sealing cover (closed state) remains unchanged, so the change in the tension of the tension spring can be ensured, thereby changing the support strength of the holding frame on the sealing cover, which is convenient to meet different usage requirements.

[0031] The above description is only the preferred implementation of the utility model, and is not intended to limit the utility model. For those skilled in the art, the utility model can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A novel flue check valve, comprising a valve seat (1), characterized in that: A valve housing (2) is integrally formed on the valve seat (1), a sealing cover (3) is symmetrically mounted in the valve housing (2), the sealing cover (3) is rotatably connected to the valve housing (2), a positioning frame (4) is also fixedly mounted in the valve housing (2), a holding frame (5) for holding the sealing cover (3) is symmetrically mounted on the positioning frame (4), the middle part of the holding frame (5) is rotatably connected to the positioning frame (4), a guide seat (6) is fixedly mounted in the positioning frame (4), an elastic lifting frame (7) is slidably mounted at the lower end of the guide seat (6), the lower end of the elastic lifting frame (7) is connected to the head of the holding frame (5), and an adjusting screw (8) for adjusting the height of the elastic lifting frame (7) is also mounted on the guide seat (6).

2. A novel flue check valve according to claim 1, characterized in that: The positioning frame (4) comprises a frame shell (41), a lower cover (42) and a bracket (43); both ends of the frame shell (41) are fixedly mounted in the valve shell (2); the lower cover (42) is fixedly mounted on the lower end surface of the frame shell (41); and the bracket (43) is symmetrically fixed on the lower end surface of the frame shell (41).

3. A novel flue check valve according to claim 2, characterized in that: The pressing frame (5) comprises a swing rod (51) and a pressing roller (52); the head of the swing rod (51) is provided with a connecting shaft (511) connected to the elastic lifting frame (7); and the pressing roller (52) is fixedly mounted on the end of the swing rod (51).

4. A novel flue check valve according to claim 3, characterized in that: The guide seat (6) comprises a seat shell (61) and a top frame (62); the top frame (62) is arranged on the upper end surface of the seat shell (61), and the top frame (62) and the seat shell (61) are integrally formed.

5. A novel flue check valve according to claim 4, characterized in that: The middle part of the lower end surface of the seat shell (61) is provided with a slide groove (611) for the elastic lifting frame (7) to be slidably installed thereon, and the center of the upper end surface of the seat shell (61) is provided with a threaded sleeve (612) threadedly connected to the adjusting screw (8).

6. A novel flue check valve according to claim 5, characterized in that: The elastic lifting frame (7) comprises a lifting seat (71), a guide rod (72), a tension spring (73) and a slider (74); the lower end of the tension spring (73) is fixedly mounted at the center of the upper end surface of the lifting seat (71); the guide rod (72) is slidably mounted in the seat shell (61), and the lower end of the guide rod (72) is fixed on the lifting seat (71); the slider (74) is fixed on the head of the tension spring (73), and the slider (74) is rotatably connected to the head of the adjusting screw (8).

7. A novel flue check valve according to claim 6, characterized in that: The lifting seat (71) comprises a middle frame (711) and a horizontal shell (712) for installing the connecting shaft (511), wherein the horizontal shell (712) is symmetrically arranged at two ends of the middle frame (711), and the horizontal shell (712) is fixedly connected to the middle frame (711).

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