Adjustable gas two-stage pressure reducing valve

Abstract

The utility model belongs to the technical field of gas pressure reducing valves, and particularly relates to an adjustable gas two-stage pressure reducing valve which is characterized in that a valve element is installed on the gas outlet side of a valve body, a plurality of gas outlet holes with different hole diameters are formed in the valve element in the radial direction at intervals, and the valve element can rotate to a designated position and be limited, so that the corresponding gas outlet holes are communicated with a pressure reducing cavity and the gas outlet end of the pressure reducing valve; the purpose of the utility model is to adjust the flow of the pressure reducing valve and match the gas amount of the combustion chamber with the oxygen content by arranging a plurality of air outlet holes with different apertures, so that the combustion is more sufficient, and the burner can be suitable for different altitude areas.

Description

Technical Field

[0001] The utility model relates to the technical field of gas pressure reducing valves, in particular to an adjustable two-stage gas pressure reducing valve. Background Art

[0002] A gas generator is a new, efficient, new energy generator that uses liquefied gas, natural gas and other combustible gases as fuel, replacing gasoline and diesel. When using gas, since the gas is stored in a gas cylinder, a pressure reducing valve is required to reduce the pressure. The pressure reducing valve includes a first-level pressure reducing valve and a second-level pressure reducing valve. The first-level pressure reducing valve is mainly used to regulate the high-pressure gas at the outlet of the gas cylinder. The second-level pressure reducing valve makes the gas pressure more stable through two-stage pressure regulation, and the gas is sent into the combustion chamber to mix with the air and burn.

[0003] However, in areas with higher altitudes, the atmospheric pressure becomes lower and the oxygen content in the air is lower. After the air and gas enter the combustion chamber, the less oxygen will lead to incomplete combustion, resulting in reduced power, which in turn affects the generator's power generation efficiency. Utility Model Content

[0004] In order to overcome the deficiencies of the prior art, the utility model aims to provide an adjustable two-stage gas pressure reducing valve that can be used in areas with different altitudes.

[0005] The technical solution adopted by the utility model is as follows:

[0006] An adjustable gas two-stage pressure reducing valve, wherein a valve core is installed on the gas outlet side of the valve body, and the valve core is radially spaced with a plurality of gas outlet holes of different aperture sizes, and the valve core can be rotated to a specified position and limited so that the corresponding gas outlet holes are connected to the pressure reducing chamber and the gas outlet end of the pressure reducing valve.

[0007] Compared with the prior art, the beneficial effects of the present invention are:

[0008] By setting a plurality of air outlet holes with different apertures and adjusting the flow rate of the pressure reducing valve, the amount of gas in the combustion chamber is matched with the oxygen content, so that the combustion is more complete and suitable for areas at different altitudes.

[0009] As a preferred embodiment of the present invention, it also includes a control component, and the control component controls the valve core to rotate to a preset angle.

[0010] Beneficial effect: The rotation angle of the valve core is precisely controlled by the control component to avoid the air outlet hole being misaligned with the air outlet end after adjustment.

[0011] As a preferred embodiment of the utility model, the control component includes a limit ring, a valve cover is fixedly mounted on the valve body, a circular ring is provided above the valve cover, positioning blocks are symmetrically provided on both sides of the circular ring, the limit ring is fixedly connected to the valve core, and a limit block is provided on the limit ring. When the limit block rests on one of the positioning blocks, one of the air outlet holes is connected to the cavity and the air outlet end.

[0012] Beneficial effects: By setting the limit ring, it is convenient for users to grasp and adjust. Due to the cross setting of the air outlet holes, the conversion shaft can be rotated 180° to complete the adjustment of all gears. By setting the positioning block and the limit block, the maximum gear and the minimum gear are limited to achieve precise adjustment.

[0013] As a preferred embodiment of the utility model, it also includes an insert, a valve cover is fixedly mounted on the valve body, a mounting hole is transversely opened on the valve cover, a plurality of slots are circumferentially opened on the valve core, the insert passes through the mounting hole and rests on the corresponding slot, and the corresponding air outlet is connected to the cavity and the air outlet end.

[0014] Beneficial effects: By setting the insert and the slot, the conversion shaft is limited to avoid accidental touch and rotation of the conversion shaft; since the insert is set on the valve body, it is necessary to open a hole on the valve body, which affects the air tightness and increases the height of the valve body. Therefore, the insert is set on the valve cover, and only a protrusion needs to be set on the valve cover and then a hole needs to be opened.

[0015] As a preferred embodiment of the utility model, the insert includes a fixing rod, which is fixedly installed in the mounting hole, and a compression spring is fixedly connected to the inner side of the fixing rod, and a movable clamping block is fixedly connected to the end of the compression spring, and the movable clamping block is pressed against the corresponding clamping slot, and the contact surface between the movable clamping block and the clamping slot is an arc-shaped surface.

[0016] Beneficial effect: Since the position of the fixed rod is fixed, and the movable block is inserted into the slot, and the contact surface is an arc-shaped surface, the larger friction force can be overcome and the upper shaft body can be directly rotated. After the movable block is separated from the slot, it rests on the outer wall of the upper shaft body. At this time, the friction force overcome by the rotation is the same until the movable block is inserted into the next slot. Therefore, the hand feel will change significantly and precise gear position can be achieved. Compared with completely removing the insert, this adjustment method can avoid the drop or loss of the insert.

[0017] As a preferred embodiment of the utility model, a first through hole is formed on the valve cover, a second through hole is formed on the valve body, the valve core includes a conversion shaft and an upper shaft body, the conversion shaft is vertically rotatably installed in the second through hole, the upper end surface of the conversion shaft contacts the lower end surface of the valve cover, the upper shaft body is rotatably connected to the first through hole, and the slot is arranged on the upper shaft body.

[0018] Beneficial effect: During installation, the valve core is first placed into the second through hole, and then the valve cover is buckled. The installation method is simple, and after the valve cover is fixed by screws, it plays a vertical limiting role on the valve core.

[0019] As a preferred embodiment of the present invention, the mounting hole is a threaded hole, and the insert is a screw.

[0020] Beneficial effect: By setting the screw, disassembly and assembly are convenient, and the tightness of the compression spring can be adjusted according to the extension amount of the screw, so as to avoid the limitation effect becoming worse after the spring ages, and the need to replace the entire insert.

[0021] As a preferred embodiment of the utility model, the control component includes an air pressure sensor and a control motor, the output shaft of the control motor is fixedly connected to the upper shaft body, and drives the upper shaft body to rotate a preset angle according to the value change of the air pressure sensor.

[0022] Beneficial effect: Automatic adjustment can be achieved through air pressure sensor and control motor.

[0023] As a preferred embodiment of the present invention, a sealing ring is provided between the valve core and the valve body.

[0024] Beneficial effect: There may be a gap between the conversion shaft and the second through hole. By providing a sealing ring and an annular groove, the gap is blocked to ensure the air tightness of the pressure reducing valve.

[0025] As a preferred embodiment of the utility model, it also includes a sealing rubber block, a tension spring, a rocker arm, an elastic diaphragm and an adjusting bolt. The sealing rubber block blocks the air inlet end of the valve body, one end of the rocker arm is fixedly connected to the sealing rubber block, and the other end of the rocker arm is fixedly connected to the elastic diaphragm. The two ends of the tension spring are respectively fixedly connected to the bottom wall of the valve body and the middle of the rocker arm. When the gas pressure outside the air inlet end is greater than the gas pressure in the cavity, the sealing rubber block is lifted up until the gas pressure in the cavity is balanced with the gas pressure outside the air inlet end, and the rocker arm is reset; the adjusting bolt is installed on the valve cover and rests against the upper end surface of the elastic diaphragm.

[0026] Beneficial effect: Through the above structure, the air pressure at the air inlet end and in the cavity can be automatically balanced, and the tightness of the elastic diaphragm can be adjusted by rotating the adjusting bolt, thereby limiting the swing amplitude of the rocker arm and adjusting the maximum air pressure in the cavity. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 It is a structural schematic diagram of an embodiment of the adjustable gas two-stage pressure reducing valve of the utility model;

[0028] Figure 2 It is a schematic diagram of the internal structure of an embodiment of the adjustable gas two-stage pressure reducing valve of the utility model;

[0029] Figure 3 It is a structural schematic diagram of a valve core in an embodiment of an adjustable gas two-stage pressure reducing valve of the utility model.

[0030] The reference numerals include: air inlet end 1, sealing rubber block 2, rocker arm 3, elastic diaphragm 4, cavity 5, air outlet end 6, valve body 7, valve core 8, air outlet hole 81, conversion shaft 82, upper shaft body 821, ring 83, positioning block 84, limit ring 85, limit block 86, slot 87, screw 88, compression spring 89, movable block 810, sealing ring 811, valve cover 9. DETAILED DESCRIPTION

[0031] Typical embodiments that embody the features and advantages of the present invention will be described in detail in the following description. It should be understood that the present invention can have various changes in different embodiments without departing from the scope of the present invention, and the descriptions and illustrations therein are essentially for illustrative purposes rather than for limiting the present invention.

[0032] In the description of the present application, the terms "first", "second", "one side", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the structure referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present application.

[0033] See also Figure 1 and Figure 2 As shown, the present embodiment discloses an adjustable gas two-stage pressure reducing valve, comprising an air inlet end 1, a sealing rubber block 2, a rocker arm 3, an elastic diaphragm 4, a cavity 5, an air outlet end 6, a valve body 7 tension spring, an adjusting bolt and a valve cover 9, wherein the valve body 7 is provided with a valve core 8, and the valve core 8 is radially provided with a plurality of air outlet holes 81, each of the air outlet holes 81 having a different aperture, wherein the two ends of one of the air outlet holes 81 are respectively connected with the cavity 5 and the air outlet end 6 of the valve body 7, and as the valve core 8 rotates, different air outlet holes 81 are connected with the cavity 5 and the air outlet end 6; by setting a plurality of air outlet holes 81 with different apertures, the flow rate of the pressure reducing valve is adjusted, and the amount of gas in the combustion chamber is matched with the oxygen content, so that the combustion is more complete, so as to be suitable for different altitudes.

[0034] In this embodiment, there are three air outlet holes 81, which are respectively used for 1000 meters to 2000 meters, 2000 meters to 3000 meters, and 3000 meters to 4000 meters.

[0035] Among them, see Figure 2As shown, the sealing rubber block 2 blocks the air inlet end 1 of the valve body 7, one end of the rocker arm 3 is fixedly connected to the sealing rubber block 2, and the other end of the rocker arm 3 is fixedly connected to the elastic diaphragm 4, and the two ends of the tension spring are respectively fixedly connected to the inner bottom wall of the valve body 7 and the middle of the rocker arm 3. When the gas pressure outside the air inlet end 1 is greater than the gas pressure of the cavity 5, the sealing rubber block 2 is lifted up until the gas pressure of the cavity 5 is balanced with the gas pressure outside the air inlet end 1, and the rocker arm 3 is reset; the adjusting bolt is installed on the valve cover 9 and abuts against the upper end surface of the elastic diaphragm 4; through the above structure, automatic balancing of the air pressure in the air inlet end 1 and the cavity 5 is achieved, and by rotating the adjusting bolt, the tightness of the elastic diaphragm 4 can be adjusted, thereby limiting the swing amplitude of the rocker arm 3, thereby adjusting the maximum air pressure in the cavity 5.

[0036] Among them, the valve cover 9 is fixedly installed on the valve body 7, a first through hole is opened on the valve cover 9, a second through hole is opened on the valve body 7, the valve core 8 includes a conversion shaft 82 and an upper shaft body 821, the valve core 8 is vertically rotatably installed in the second through hole, the upper end surface of the conversion shaft 82 is in contact with the lower end surface of the valve cover 9, the conversion shaft 82 and the upper shaft body 821 are integrally formed and rotatably connected to the first through hole; during installation, the valve core 8 is first placed in the second through hole, and then the valve cover 9 is buckled. The installation method is simple, and after the valve cover 9 is fixed by screws 88, it plays a vertical limiting role on the valve core 8.

[0037] Among them, see Figure 3 As shown, a control component is arranged on the upper shaft body 821, and the control component includes a limit ring 85. The valve cover 9 is provided with a circular ring 83 above the first through hole, and positioning blocks 84 are symmetrically arranged on both sides of the circular ring 83. The limit ring 85 is fixedly connected to the upper shaft body 821, and a limit block 86 is arranged on the limit ring 85. When the limit block 86 is pressed against one of the positioning blocks 84, one of the air outlets 81 is connected with the cavity 5 and the air outlet end 6. By setting the limit ring 85, it is convenient for the user to grasp and adjust. Due to the cross setting of the air outlet 81, the conversion shaft 82 can be rotated 180° to complete the adjustment of all gears. By setting the positioning blocks 84 and the limit blocks 86, the maximum gear and the minimum gear are limited to achieve precise adjustment.

[0038] Among them, the control component also includes an insert, a mounting hole is horizontally opened on the valve cover 9, and a plurality of slots 87 are circumferentially opened on the conversion shaft 82. The insert passes through the mounting hole and rests on the corresponding slot 87, and the corresponding air outlet 81 is connected with the cavity 5 and the air outlet end 6; by setting the insert and the slot 87, the conversion shaft 82 is limited to avoid accidental touch causing the conversion shaft 82 to rotate.

[0039] Among them, the insert includes a fixing rod, which is fixedly installed in the mounting hole, and a compression spring 89 is fixedly connected to the inner side of the fixing rod, and a movable clamping block 810 is fixedly connected to the end of the compression spring 89, and the movable clamping block 810 is pressed against the corresponding clamping slot 87, and the contact surface between the movable clamping block 810 and the clamping slot 87 is an arc surface; since the position of the fixing rod is fixed, and the movable clamping block 810 is inserted into the clamping slot 87, and the contact surface is an arc surface, the larger friction force can be overcome, and the upper shaft body 821 can be directly rotated, and the movable clamping block 810 is pressed against the outer wall of the upper shaft body 821 after being separated from the clamping slot 87. At this time, the friction force overcome by the rotation is the same until the movable clamping block 810 is inserted into the next clamping slot 87. Therefore, the hand feel will change significantly, and accurate gearing can be achieved; and this adjustment method, compared with completely removing the insert, can avoid the situation where the insert falls off or is lost.

[0040] Among them, the mounting hole is a threaded hole, and the insert is a screw 88; by setting the screw 88, disassembly and assembly are convenient, and the tightness of the compression spring 89 can be adjusted according to the extension amount of the screw 88, so as to avoid the limiting effect from deteriorating after the spring ages, and the need to replace the entire insert.

[0041] In other embodiments, the control component includes an air pressure sensor and a control motor, the output shaft of the control motor is fixedly connected to the upper shaft 821, and drives the upper shaft 821 to rotate a preset angle according to the value change of the air pressure sensor; automatic adjustment can be achieved through the air pressure sensor and the control motor.

[0042] Among them, see Figure 2 As shown, an annular groove is provided in the second through hole, and a sealing ring 811 is sleeved on the conversion shaft 82, and the sealing ring 811 is located in the annular groove; there may be a gap between the conversion shaft 82 and the second through hole, and the gap is sealed by providing the sealing ring 811 and the annular groove, thereby ensuring the air tightness of the pressure reducing valve.

[0043] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. An adjustable gas two-stage pressure reducing valve, characterized in that: It includes a valve body, a valve core is installed on the air outlet side of the valve body, and the valve core is radially spaced with multiple air outlet holes of different apertures. The valve core can be rotated to a specified position and limited so that the corresponding air outlet holes are connected to the pressure reducing chamber and the air outlet end of the pressure reducing valve.

2. The adjustable gas two-stage pressure reducing valve according to claim 1 is characterized in that: The invention also comprises a control component, wherein the control component controls the valve core to rotate to a preset angle.

3. The adjustable gas two-stage pressure reducing valve according to claim 2 is characterized in that: The control component includes a limit ring, a valve cover is fixedly mounted on the valve body, a circular ring is arranged above the valve cover, positioning blocks are symmetrically arranged on both sides of the circular ring, the limit ring is fixedly connected to the valve core, a limit block is arranged on the limit ring, and when the limit block is pressed against one of the positioning blocks, one of the air outlet holes is connected with the cavity and the air outlet end.

4. The adjustable gas two-stage pressure reducing valve according to claim 1 is characterized in that: It also includes an insert, a valve cover is fixedly installed on the valve body, a mounting hole is horizontally opened on the valve cover, and a plurality of slots are circumferentially opened on the valve core. The insert passes through the mounting hole and rests on the corresponding slot, and the corresponding air outlet is connected with the cavity and the air outlet end.

5. The adjustable gas two-stage pressure reducing valve according to claim 4 is characterized in that: The insert includes a fixing rod, which is fixedly installed in the mounting hole. A compression spring is fixedly connected to the inner side of the fixing rod. A movable block is fixedly connected to the end of the compression spring. The movable block rests on the corresponding slot, and the contact surface between the movable block and the slot is an arc surface.

6. The adjustable gas two-stage pressure reducing valve according to claim 4, characterized in that: The valve cover is provided with a first through hole, the valve body is provided with a second through hole, the valve core comprises a conversion shaft and an upper shaft body, the conversion shaft is vertically rotatably installed in the second through hole, the upper end surface of the conversion shaft contacts the lower end surface of the valve cover, the upper shaft body is rotatably connected to the first through hole, and the slot is arranged on the upper shaft body.

7. The adjustable gas two-stage pressure reducing valve according to claim 5, characterized in that: The mounting hole is a threaded hole, and the insert is a screw.

8. The adjustable gas two-stage pressure reducing valve according to claim 2, characterized in that: The control component includes an air pressure sensor and a control motor. The output shaft of the control motor is fixedly connected to the upper shaft body, and drives the upper shaft body to rotate by a preset angle according to the value change of the air pressure sensor.

9. The adjustable gas two-stage pressure reducing valve according to claim 1, characterized in that: A sealing ring is arranged between the valve core and the valve body.

10. The adjustable two-stage gas pressure reducing valve according to claim 1, characterized in that: It also includes a sealing rubber block, a tension spring, a rocker arm, an elastic diaphragm and an adjusting bolt. The sealing rubber block blocks the air inlet end of the valve body, one end of the rocker arm is fixedly connected to the sealing rubber block, and the other end of the rocker arm is fixedly connected to the elastic diaphragm. The two ends of the tension spring are respectively fixedly connected to the bottom wall of the valve body and the middle of the rocker arm. When the gas pressure outside the air inlet end is greater than the gas pressure in the cavity, the sealing rubber block is lifted up until the gas pressure in the cavity is balanced with the gas pressure outside the air inlet end, and the rocker arm is reset. The adjusting bolt is installed on the valve cover and rests against the upper end surface of the elastic diaphragm.

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