Rotary valve disc assembly on flow valve for combustion engine

Abstract

The utility model discloses a rotary valve disc assembly on a flow valve for a combustion engine. The rotary valve disc assembly comprises a rotary disc, a valve chassis, a rotary shaft, a pressure spring and a limiting pin, the rotating shaft sequentially penetrates through the pressure spring, the rotating disc and the valve base plate and is fixed on the valve base plate; the limiting pin is fixed in a pin hole of the valve base plate, and the limiting pin is arranged in a limiting groove of the rotating plate; and the rotating disc is movably connected with the rotating shaft. The rotary valve disc assembly on the flow valve for the combustion engine has the functions of being high in flow adjusting precision, slow in opening, free of inner leakage after full closing and the like.

Description

Technical Field

[0001] The utility model relates to a rotary valve disc, in particular to a rotary valve disc component on a flow valve for a combustion machine. Background Art

[0002] The flow valve for burners is a valve widely used in the field of gas and oil. It controls the size of the fire by adjusting the flow rate.

[0003] The main actuators of the flow valves for burners on the market are mainly composed of simple servo motors and controllers. Among them, the simple servo motor is mainly composed of a DC motor and an angle sensor with low accuracy. This kind of actuator has the following problems:

[0004] 1. The flow control accuracy is not high, which is not conducive to saving natural gas, diesel and other resources;

[0005] 2. The flow regulating device of the flow valve is composed of a ball rod and a valve port. The flow valve is radially sealed in the fully closed state. This sealing method cannot achieve full closure without flow. In order to ensure stable ignition and no gas or liquid leakage, a slow-opening solenoid valve is added between the flow valve (slow-opening solenoid valve: by controlling the starting speed of the valve core, the solenoid valve is slowly opened, thereby accurately controlling the fluid flow). The slow-opening solenoid valve is expensive, which undoubtedly increases the user's cost. Utility Model Content

[0006] The utility model aims to overcome the above-mentioned deficiencies of the prior art and provides a rotary valve disc assembly on a flow valve for a burner.

[0007] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0008] A rotary valve disc assembly on a flow valve for a burner, comprising a rotary disc, a valve bottom plate, a rotary shaft, a compression spring, and a limit pin;

[0009] The rotating shaft passes through the compression spring, the rotating disk, and the valve bottom plate in sequence, and the rotating shaft is fixed on the valve bottom plate;

[0010] The limit pin is fixed in the pin hole of the valve bottom plate, and the limit pin is placed in the limit groove of the rotating plate;

[0011] The rotating disk is movably connected to the rotating shaft.

[0012] In the above-mentioned rotary valve disc assembly on the flow valve for a combustion engine, the rotary disc includes a secondary transmission gear matched with the primary transmission gear, a flow gate, and a first sealing end surface corresponding to the second sealing end surface of the valve bottom plate.

[0013] In the above-mentioned rotary valve disc assembly on the flow valve for a burner, a third shaft hole matching the rotating shaft is provided at the center of the secondary transmission gear.

[0014] In the above-mentioned rotary valve disc assembly on the flow valve for a burner, the valve base comprises a pin hole matching the limit pin, a fourth shaft hole matching the rotating shaft, and a valve port matching the flow gate.

[0015] In the above-mentioned rotary valve disc assembly on the flow valve for a burner, when the limit pin contacts the first limit point of the limit groove, the first sealing end surface covers the valve port, and the second sealing end surface covers the flow gate;

[0016] In the above-mentioned rotary valve disc assembly on the flow valve for a burner, when the limit pin contacts the second limit point of the limit groove, the valve port corresponds to the position of the flow gate.

[0017] Compared with the prior art, the utility model has the following beneficial effects:

[0018] The rotary valve disc assembly adopted by the utility model has a valve opening angle, that is, the angle at which the rotary disc needs to run to reach the opening position, thereby having the function of a slow-opening solenoid valve and improving the stability of ignition; at the same time, by ensuring the flatness of the first sealing end face and the second sealing end face in the flow regulating device, full closure without leakage is achieved, thereby improving the safety of use.

[0019] The utility model also adopts a gear transmission structure of the rotating disk, and then drives the rotating disk through a stepping motor, which further improves the flow control accuracy and is beneficial to saving resources such as natural gas. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The utility model is further described with reference to the accompanying drawings:

[0021] Figure 1 It is a schematic diagram of the explosion structure of the utility model;

[0022] Figure 2 It is a partial enlarged schematic diagram of the valve chassis in the utility model;

[0023] Figure 3 It is a structural schematic diagram of the rotating disk in the utility model;

[0024] Figure 4 It is a structural schematic diagram of the fully closed state in the utility model;

[0025] Figure 5 It is a structural schematic diagram of the fully open state in the utility model.

[0026] In the figure,

[0027] 14-rotating disk, 1401-third shaft hole, 1402-secondary transmission gear, 1403-flow gate, 1404-limiting groove, 14041-first limiting point, 14042-second limiting point, 1405-first sealing end surface;

[0028] 15-valve chassis, 1501-fourth shaft hole, 1502-valve port, 1503-pin hole, 1504-second sealing end surface, 1505-third sealing ring groove;

[0029] 16-rotation axis;

[0030] 17-Compression spring;

[0031] 18-nut;

[0032] 20-Limiting pin. DETAILED DESCRIPTION

[0033] The present invention is described in detail below with reference to the accompanying drawings and by means of exemplary embodiments. The following detailed description of the present invention is only for exemplary purposes and is by no means a limitation of the present invention and its application or use.

[0034] Embodiment 1

[0035] The following is a further description of the rotary turntable assembly in the utility model, referring to Figure 1 to Figure 5 As shown:

[0036] The rotary valve disc assembly includes a rotary disc 14, a valve base 15, a rotary shaft 16, a compression spring 17, and a limit pin 20;

[0037] The rotating shaft 16 passes through the compression spring 17, the rotating disk 14, and the valve bottom plate 15 in sequence, and the rotating shaft 16 is fixedly sealed on the valve bottom plate 15 by welding, threading, or gluing. In order to facilitate maintenance and assembly, the utility model fixes the rotating shaft 16 on the valve bottom plate 15 by a nut 18. In order to prevent air contamination, a sealing ring groove is designed above the external thread of the rotating shaft 16 for accommodating a matching sealing ring.

[0038] The limiting pin 20 is fixed in the pin hole 1503 of the valve bottom plate 15, and the limiting pin 20 is placed in the limiting groove 1404 of the rotating plate 14;

[0039] The rotating disk 14 is movably connected to the rotating shaft 16 .

[0040] In the present invention, the number of the limit pins 20 is more than one. However, during the transmission process, in the fully closed state, in order to achieve a better sealing effect and a more uniform force on the rotating disk 14, the number of the limit pins 20 can be multiple and evenly distributed; and the number and distribution position of the limit slots 1404 corresponding to the limit pins 20 correspond to the limit pins 20.

[0041] To further explain the rotating disk 14 in the present invention, please refer to Figure 1 , Figure 3 As shown:

[0042] Preferably, a secondary transmission gear 1402 for meshing transmission and a first sealing end face 1405 corresponding to the second sealing end face 1504 of the valve chassis 15 are designed on the rotating disk 14; the number of the flow gates 1403 is specifically designed according to the flow area. In the utility model, the number of the flow gates 1403 can be multiple and evenly distributed.

[0043] Preferably, a third shaft hole 1401 matching with the rotating shaft 16 is provided at the center of the secondary transmission gear 1402;

[0044] Preferably, the first sealing end face 1405 is in the same plane with the flow gate 1403, the limiting groove 1404 and the third axial hole 1401. To prevent internal leakage, the flatness of the first sealing end face 1405 is 0 to 0.008 mm. In actual operation, the flatness can reach below 0.002 mm.

[0045] In order to further explain the valve chassis 15 in the utility model:

[0046] The valve chassis 15 includes a pin hole 1503 matching the limit pin 20, a fourth axis hole 1501 matching the rotating shaft 16, and a valve port 1502 matching the flow gate 1403, and the number and shape of the valve port 1502 correspond to the flow gate 1403; in order to prevent internal leakage, the flatness of the second sealing end face 1504 is 0~0.008mm; in the actual operation process, the flatness can reach below 0.002mm.

[0047] Preferably, the second sealing end surface 1504 is in the same plane as the pin hole 1503 , the fourth shaft hole 1501 , and the valve port 1502 .

[0048] Preferably, in order to prevent gas from flowing up and down the valve bottom plate 15, a third sealing ring groove 1505 is designed on the outer wall of the valve bottom plate 15 for installing a matching sealing ring.

[0049] In order to realize the slow opening function of the flow valve for the burner, a valve opening angle is designed between the limit pin 20 and the valve port 1502, and the valve opening angle is between 5° and 20°. The valve opening angle refers to the opening angle from the fully closed position to the just opened position. It can also be said that, for example, the 5th degree belongs to the open position, and 0 to 5 degrees are in a flow blocking state.

[0050] Reference Figure 4 Combination Figure 1 As shown, the position state of the rotating disk 14 and the valve bottom plate 15 in the fully closed state of the present invention is further explained. For the convenience of understanding, the number of the limit pins 20 used in the present invention is two, the number of the limit grooves 1404 is two, the number of the flow gates 1403 and the number of the valve ports 1502 are both two, but this shall not limit the present invention, as follows:

[0051] When the limiting pin 20 contacts the first limiting point 14041 of the limiting groove 1404, the first sealing end surface 1405 covers the valve port 1502, and the second sealing end surface 1504 covers the flow gate 1403, so as to achieve full-close control of the flow;

[0052] Reference Figure 5 Combination Figure 1 As shown, the position state of the rotating disk 14 and the valve bottom plate 15 in the fully open state of the present invention is further explained. For the convenience of understanding, the number of the limit pins 20 used in the present invention is two, the number of the limit grooves 1404 is two, the number of the flow gates 1403 and the number of the valve ports 1502 are both two, but this is by no means to limit the present invention, as follows:

[0053] When the limiting pin 20 contacts the second limiting point 14042 of the limiting groove 1404 , the valve port 1502 corresponds to the position of the flow gate 1403 to achieve full-open control of the flow.

[0054] The utility model preferably adopts a bevel gear structure as the transmission structure of the secondary transmission gear 1402. The biggest advantage of adopting this structure is that the rotating disk 14 is always in contact with the valve bottom plate 15.

[0055] Embodiment 2

[0056] What is different from Example 1 is that the transmission structure of the secondary transmission gear 1402 is a worm gear transmission structure. The biggest advantage of this structure is that it has a large transmission ratio and the stepper motor 1 only needs to use a very small force to drive the rotating disk 14. However, in order to prevent the rotating disk 14 from deviating outward, it is necessary to increase the elastic force of the compression spring 17. The elastic force should be adjusted according to the output torque of the stepper motor 1.

[0057] Embodiment 3

[0058] What is different from the first embodiment is that the transmission structure of the secondary transmission gear 1402 is a common gear transmission structure, such as a spur gear transmission structure or a helical gear transmission structure.

[0059] The above embodiments are only for illustrating the technical concept and features of the utility model, and their purpose is to enable those skilled in the art to understand the content of the utility model and implement it accordingly, and they cannot be used to limit the protection scope of the utility model. Any equivalent changes or modifications made according to the essence of the content of the utility model should be included in the protection scope of the utility model.

Claims

1. A rotary valve disc assembly on a flow valve for a burner, characterized in that: It comprises a rotating disk (14), a valve bottom plate (15), a rotating shaft (16), a compression spring (17), and a limiting pin (20); The rotating shaft (16) passes through the compression spring (17), the rotating disk (14), and the valve bottom plate (15) in sequence, and the rotating shaft (16) is fixed on the valve bottom plate (15); The limiting pin (20) is fixed in the pin hole (1503) of the valve bottom plate (15), and the limiting pin (20) is placed in the limiting groove (1404) of the rotating plate (14); The rotating disk (14) is movably connected to the rotating shaft (16).

2. The rotary valve disc assembly on a flow valve for a burner according to claim 1, characterized in that: The rotating disk (14) comprises a secondary transmission gear (1402), a flow gate (1403), and a first sealing end surface (1405) corresponding to a second sealing end surface (1504) of the valve bottom plate (15).

3. The rotary valve disc assembly on a flow valve for a burner according to claim 2, characterized in that: A third shaft hole (1401) matching with the rotating shaft (16) is provided at the center of the secondary transmission gear (1402).

4. The rotary valve disc assembly on a flow valve for a burner according to claim 2, characterized in that: The valve chassis (15) comprises a pin hole (1503) matching the limit pin (20), a fourth shaft hole (1501) matching the rotating shaft (16), and a valve port (1502) matching the flow gate (1403).

5. The rotary valve disc assembly on a flow valve for a burner according to claim 4, characterized in that: When the limiting pin (20) contacts the first limiting point (14041) of the limiting groove (1404), the first sealing end surface (1405) covers the valve port (1502), and the second sealing end surface (1504) covers the flow gate (1403); When the limiting pin (20) contacts the second limiting point (14042) of the limiting groove (1404), the valve port (1502) corresponds to the position of the flow gate (1403).

Images