Filtering type air pressure reducing valve

Abstract

The utility model relates to the technical field of air pressure reducing valves, in particular to a filtering type air pressure reducing valve which comprises a valve body air inlet with an inner cavity and an outer cavity arranged in a layered mode, the inner cavity of the valve body air inlet is integrally connected with a containing plate used for containing a filter element, and a hydraulic cavity for filling water is formed in the valve body air inlet. The upper end of the hydraulic cavity is slidably sleeved with a first piston rod, and the lower end of the hydraulic cavity is slidably sleeved with a second piston rod. When the fixing mechanism does not fix and limit the first piston rod, the first spring pulls the first piston rod to reset, the first piston rod drives the driving plate to reset through the second piston rod, and the driving plate drives the telescopic rod to contract inwards through the traction rod, so that the clamping plate does not fix and clamp the filter element; compared with the prior art that the filter element is difficult to disassemble, the technical scheme has the advantages that the filter element is convenient to install, the filter element can be cleaned by disassembling the filter element, and the service life of the filter element can be prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of air pressure reducing valves, in particular to a filtering air pressure reducing valve. Background Art

[0002] The pressure reducing valve is a valve that reduces the inlet pressure to a required outlet pressure through adjustment, and relies on the energy of the medium itself to automatically keep the outlet pressure stable. The pressure reducing valve is a throttling element with variable local resistance, that is, by changing the throttling area, the flow rate and the kinetic energy of the fluid are changed, resulting in different pressure losses, thereby achieving the purpose of pressure reduction.

[0003] The prior art mostly adopts a filtered air pressure reducing valve proposed by Chinese application number CN202021500377.0, which filters the gas through a filter element, and squeezes the filter element at the end of the air inlet through the elastic element to ensure the sealing between the end of the filter element and the end of the air inlet, thereby preventing the gas entering the air intake nozzle from directly entering the valve body through the gap between the end of the filter element and the end of the air inlet without passing through the filter element.

[0004] In the above technical solution, after the filter element can filter the gas, a large amount of impurities will be attached to the filter element after long-term use, and the original filtering effect will be lost. Instead, the flowing gas will be blocked, which will have a negative impact on the normal operation of the air pressure reducing valve. Utility Model Content

[0005] The utility model aims to solve the problem in the prior art that a large amount of impurities may adhere to the filter element after long-term use, and proposes a filter-type air pressure reducing valve.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] A filtered air pressure reducing valve, comprising an air inlet of a valve body with inner and outer cavities arranged in layers, the inner cavity of the air inlet of the valve body being integrally connected with a placement plate for placing a filter element, a hydraulic cavity filled with water being provided on the air inlet of the valve body, a first piston rod being slidably sleeved on the upper end of the hydraulic cavity, a second piston rod being slidably sleeved on the lower end of the hydraulic cavity, a first spring being welded between the first piston rod and the hydraulic cavity, a receiving groove being provided on the inner cavity of the air inlet of the valve body, a telescopic rod being fixedly connected to the receiving groove, a clamping plate for fixing and limiting the filter element being fixedly connected at one end of the telescopic rod away from the receiving groove, a driving plate being fixedly connected at the lower end of the second piston rod, a traction rod being connected between the driving plate and one end of the telescopic rod extending outside the receiving groove;

[0008] The air inlet of the valve body is provided with a fixing mechanism for fixing and limiting the first piston rod.

[0009] Preferably, a vent is provided on the placement plate, the first spring is longitudinally movably sleeved on the first piston rod, and the telescopic rod is a telescopic sleeve structure.

[0010] Preferably, the clamping plate is an arc-shaped structure arranged corresponding to the upper end of the filter element, the driving plate is slidably mounted in the storage groove, and both ends of the traction rod are pin-connected between the driving plate and the telescopic rod.

[0011] Preferably, the fixing mechanism comprises a guide slot provided on the air inlet of the valve body, a guide slider and a second spring are provided in the guide slot, and a fixing rod penetrating the first piston rod is fixedly connected to the guide slider.

[0012] Preferably, the guide slider is slidably mounted in the guide slot, and the second spring is welded to an end of the guide slot away from the guide slider.

[0013] Preferably, a fixing hole for slidingly fitting a fixing rod is provided on the first piston rod, and the fixing rod is a cylindrical structure.

[0014] Compared with the prior art, the utility model has the following advantages:

[0015] When the fixing mechanism in the utility model is no longer fixing and limiting the first piston rod 4, the first spring pulls the first piston rod to achieve reset, and the first piston rod drives the driving plate to achieve reset through the second piston rod, and the driving plate drives the telescopic rod to retract inward through the traction rod, so that the clamping plate no longer fixes and clamps the filter element. Compared with the prior art in which the filter element is difficult to disassemble, the technical solution facilitates the installation operation of the filter element, and the filter element can be cleaned by disassembling the filter element, which helps to extend the service life of the filter element. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a structural schematic diagram of a filter-type air pressure reducing valve proposed by the utility model;

[0017] Figure 2 A top view of a filter-type air pressure reducing valve proposed by the utility model;

[0018] Figure 3 For this utility model Figure 2 A local enlarged structural schematic diagram;

[0019] Figure 4 A cross-sectional view of a filter-type air pressure reducing valve proposed by the utility model;

[0020] Figure 5 For this utility model Figure 4 B is a schematic diagram of the local enlarged structure.

[0021] In the figure: 1. air inlet of valve body; 2. placement plate; 3. hydraulic chamber; 4. first piston rod; 5. second piston rod; 6. first spring; 7. storage slot; 8. telescopic rod; 9. driving plate; 10. traction rod; 11. guide slide groove; 12. guide slider; 13. second spring; 14. fixing rod; 15. clamping plate. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all of the embodiments.

[0023] Reference Figure 1-Figure 5 A filter-type air pressure reducing valve comprises a valve body air inlet 1 with inner and outer cavities arranged in layers, the inner cavity of the valve body air inlet 1 is integrally connected with a placement plate 2 for placing a filter element, and a vent is provided on the placement plate 2. It should be noted that when the filter element is movably abutted against the placement plate 2, the end of the filter element away from the placement plate 2 is located in the outer cavity of the valve body air inlet 1, and the end of the filter element away from the placement plate 2 is slidably abutted against the outer cavity of the valve body air inlet 1;

[0024] A hydraulic chamber 3 filled with water is provided on the air inlet 1 of the valve body, a first piston rod 4 is slidably mounted on the upper end of the hydraulic chamber 3, and a second piston rod 5 is slidably mounted on the lower end of the hydraulic chamber 3. It should be noted that the space between the first piston rod 4 and the second piston rod 5 is in a sealed state, and the sealing installation between the first piston rod 4 and the hydraulic chamber 3 and the second piston rod 5 and the hydraulic chamber 3 is a prior art, so it will not be described in detail.

[0025] A first spring 6 is welded between the first piston rod 4 and the hydraulic chamber 3. The first spring 6 is longitudinally movably sleeved on the first piston rod 4. Through the elastic force of the first spring 6, the first piston rod 4 can be reset when it is not pulled.

[0026] A receiving groove 7 is provided on the inner cavity of the air inlet 1 of the valve body, and a telescopic rod 8 is fixedly connected to the receiving groove 7. The telescopic rod 8 is a telescopic sleeve structure, and the end of the telescopic rod 8 away from the receiving groove 7 can be movably extended and retracted;

[0027] One end of the telescopic rod 8 away from the receiving groove 7 is fixedly connected with a clamping plate 15 for fixing and limiting the filter element. The clamping plate 15 is an arc-shaped structure arranged corresponding to the upper end of the filter element.

[0028] The lower end of the second piston rod 5 is fixedly connected to a driving plate 9, which is slidably mounted in the receiving groove 7. The driving plate 9 can be guided and limited by the receiving groove 7, which helps to ensure the stability of the driving plate 9 when it moves vertically. A traction rod 10 is connected to the driving plate 9 and the end of the telescopic rod 8 extending outside the receiving groove 7 by a pin shaft.

[0029] The air inlet 1 of the valve body is provided with a fixing mechanism for fixing and limiting the first piston rod 4. The fixing mechanism can prevent the first piston rod 4 from being reset due to external force. It should be noted that when the fixing mechanism fixes the first piston rod 4, the clamping plate 15 clamps the filter element;

[0030] It is further explained that: the fixing mechanism includes a guide slot 11 provided on the air inlet 1 of the valve body, a guide slider 12 and a second spring 13 are provided in the guide slot 11, the guide slider 12 is slidably mounted in the guide slot 11, and the second spring 13 is welded to an end of the guide slot 11 away from the guide slider 12, and the elastic force of the second spring 13 can realize the reset of the guide slider 12 when it is not pulled;

[0031] A fixing rod 14 that passes through the first piston rod 4 is fixedly connected to the guide slider 12. A fixing hole for slidingly fitting the fixing rod 14 is opened on the first piston rod 4. The fixing rod 14 is a cylindrical structure. By interlacing the fixing rod 14 with the fixing hole and cooperating with the sliding connection between the upper end of the hydraulic chamber 3 and the first piston rod 4, the first piston rod 4 can be prevented from moving due to external force.

[0032] The functional principle of the utility model can be explained through the following operation modes:

[0033] When the filter element located in the air inlet 1 of the valve body needs to be taken out, the guide slider 12 is pulled to move horizontally in the guide slot 11, and the guide slider 12 drives the fixing rod 14 away from the first piston rod 4, squeezing the second spring 13;

[0034] Under the elastic force of the first spring 6, the first piston rod 4 is reset, and the first piston rod 4 pulls the second piston rod 5 to reset through the water pressure, and the second piston rod 5 drives the driving plate 9 to reset, and the driving plate 9 drives the traction rod 10 to deflect, and the traction rod 10 drives the telescopic rod 8 to retract inward, and the telescopic rod 8 drives the clamping plate 15 to move away from the filter element, so that the filter element can be taken out from the air inlet 1 of the valve body by the operator.

[0035] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes within the technical scope disclosed by the present invention according to the technical scheme and the utility model concept of the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A filter-type air pressure reducing valve, comprising a valve body air inlet (1) with inner and outer cavities arranged in layers, characterized in that: The inner cavity of the air inlet (1) of the valve body is integrally connected with a placement plate (2) for placing a filter element, the air inlet (1) of the valve body is provided with a hydraulic cavity (3) for filling water, the upper end of the hydraulic cavity (3) is slidably sleeved with a first piston rod (4), the lower end of the hydraulic cavity (3) is slidably sleeved with a second piston rod (5), a first spring (6) is welded between the first piston rod (4) and the hydraulic cavity (3), the inner cavity of the air inlet (1) of the valve body is provided with a storage groove (7), the storage groove (7) is fixedly connected with a telescopic rod (8), the end of the telescopic rod (8) away from the storage groove (7) is fixedly connected with a clamping plate (15) for fixing and limiting the filter element, the lower end of the second piston rod (5) is fixedly connected with a driving plate (9), and a traction rod (10) is connected between the driving plate (9) and the end of the telescopic rod (8) extending outside the storage groove (7); The air inlet (1) of the valve body is provided with a fixing mechanism for fixing and limiting the position of the first piston rod (4).

2. A filtered air pressure reducing valve according to claim 1, characterized in that: The placement plate (2) is provided with a ventilating opening, the first spring (6) is longitudinally movably sleeved on the first piston rod (4), and the telescopic rod (8) is a telescopic sleeve structure.

3. A filtered air pressure reducing valve according to claim 1, characterized in that: The clamping plate (15) is an arc-shaped structure arranged corresponding to the upper end of the filter element, the driving plate (9) is slidably mounted in the storage groove (7), and the two ends of the traction rod (10) are respectively pin-connected between the driving plate (9) and the telescopic rod (8).

4. A filtered air pressure reducing valve according to claim 1, characterized in that: The fixing mechanism comprises a guide slot (11) provided on the air inlet (1) of the valve body, a guide slider (12) and a second spring (13) being arranged in the guide slot (11), and a fixing rod (14) penetrating the first piston rod (4) being fixedly connected to the guide slider (12).

5. A filtered air pressure reducing valve according to claim 4, characterized in that: The guide slide block (12) is slidably mounted in the guide slide groove (11), and the second spring (13) is welded to an end of the guide slide groove (11) away from the guide slide block (12).

6. A filtered air pressure reducing valve according to claim 4, characterized in that: The first piston rod (4) is provided with a fixing hole for slidingly fitting a fixing rod (14), and the fixing rod (14) is a cylindrical structure.

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