Low-temperature filtering pressure reducing valve

Abstract

A low-temperature filtering pressure reducing valve is composed of a valve body assembly, an adjusting assembly and a cup body assembly, namely a cup body and a semi-automatic drainage assembly. The valve body assembly comprises a main valve body, a valve cover, a diaphragm assembly, a filtering assembly, a rainproof device, a valve rod assembly, a spring seat, an adjusting spring, a connecting rod, a connecting seat, a turbulent flow ring and an auxiliary spring, and the lower end of the main valve body is connected with the cup body; the valve cover is fixed to the neck portion above the main valve body, the adjusting screw extends out of a middle hole of the valve cover, the adjusting spring, the diaphragm assembly, the valve rod assembly and the connecting rod are installed at the lower end of the adjusting screw respectively, valve inlets and outlets are formed in the left side and the right side of the main valve body, and a communication channel is formed between the inlets and the outlets in the main valve body. The vertically elastic adjusting spring presses the diaphragm assembly on the upper part and the valve rod assembly fixed with the vertically elastic adjusting spring on the lower part; a passage directly communicated with the inlet and the outlet passes through the filter element of the filter component, and the diameter of the passage is greater than 9mm; a cup body with the same diameter is fixed below the valve body; a semi-automatic drainage assembly is arranged at the bottom of the cup body.

Description

Technical Field

[0001] The utility model relates to the technical field of valve preparation, in particular to a low-temperature filtering pressure reducing valve, which is a pneumatic control valve used for fluid switching and outlet pressure control. Background Art

[0002] In pneumatic systems, power is transmitted and controlled through compressed air in a closed circuit. It is usually necessary to reduce and adjust the pressure in the circuit while ensuring the stability of the output pressure. A filter pressure reducing valve can meet these requirements while filtering out impurities such as oil, water, and dust that may be present in the air path. Fluids include liquids and gases, and valves are key devices for fluid control. Pneumatic pressure reducing valves are increasingly used for flow switching and on / off control. Currently, pressure reducing valves are used in relatively mild scenarios. When used outdoors at low temperatures or at low temperatures, low-temperature parts often become damaged and malfunction. In rainy and snowy weather outdoors, impurities such as rainwater, mosquitoes, and dust can easily enter the valve body, damaging the diaphragm and affecting the service life and normal function of the pressure reducing valve. Due to changes in temperature and phase during use, liquid condensation is a common occurrence. Pressure reducing valves must be able to automatically discharge liquid to prevent compromising the valve's function.

[0003] CN201922030563.6 discloses a pressure reducing valve pressure gauge, comprising a pressure reducing valve body and a pressure gauge assembly in sealed communication with the pressure reducing valve body; the pressure reducing valve body having an air inlet at one end and an air outlet at the other end; the pressure gauge assembly comprising a pressure gauge housing, a drive diaphragm, and a needle rotating assembly; one end of the pressure gauge housing being in sealed communication with the pressure reducing valve body; the drive diaphragm being sealed and fixedly disposed at the bottom of the pressure gauge housing and being able to be lifted upward to cooperate with the needle rotating assembly. The diaphragm type is simple in structure, impact-resistant, and has good sealing properties, preventing air leakage and making it safer and more reliable to use.

[0004] The working principles adopted by the existing filter pressure reducing valve industry are the same. The manual drainage working mode cannot meet the modern daily working conditions, nor can it guarantee normal use in low temperature and outdoor rainy and snowy weather. Therefore, the existing products cannot take into account all of the above situations at the same time. Utility Model Content

[0005] The purpose of the utility model is to provide a filtering pressure reducing valve that can be used under low temperature conditions, in particular a valve with a filtering structure for automatic drainage.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a low-temperature filtering pressure-reducing valve, the low-temperature filtering pressure-reducing valve assembly is composed of three parts: a valve body assembly, an adjusting assembly and a cup assembly, namely, a cup body 16 and a semi-automatic drainage assembly 5; the valve body assembly includes a main valve body 11, a valve cover 1, a diaphragm assembly 2, a filter assembly 4, a rainproof device 6, a valve stem assembly 3, a spring seat 7, an adjusting spring 8, a connecting rod 12, a connecting seat 13, a spoiler ring 14, a secondary spring 15, and a lower portion of the main valve body 11 connected to the cup body 16; the valve cover 1 is fixed to the upper neck of the main valve body 11, and an adjusting screw 20 extends from the middle hole of the valve cover 1, and the lower end of the adjusting screw 20 is respectively installed with the adjusting spring 8, The diaphragm assembly 2, the valve stem assembly 3 and the connecting rod 12, the inlet and outlet are provided on the left and right sides of the main valve body 11, and a connecting passage is provided between the inlet and outlet in the main valve body. The diaphragm assembly 2 is pressed on the connecting passage in the center of the main valve body, and the vertical elastic adjusting spring 8 presses the diaphragm assembly 2 and the valve stem assembly 3 fixed thereto from above; the connecting rod 12 is connected to the bottom of the valve stem assembly 3; the spring seat 7 encircles the adjusting spring 8 above the adjusting spring 8; the passage directly connecting the inlet and outlet passes through the filter element of the filter assembly, and the passage diameter is greater than 9 mm; a cup body of the same diameter is fixed below the valve body, the connecting rod 12 is located in the center of the cup body, and a filter is installed around the bottom of the connecting rod 12; the bottom of the cup body is a semi-automatic drainage assembly.

[0007] This new low-temperature filter-pressure reducing valve features an optimized internal structure, with metal components made of 316 stainless steel and seals and diaphragms made of ultra-low-temperature materials. A rain shield is installed at the exhaust port, which is exposed to the outside world, and a semi-automatic drainage mechanism is used. Its operating characteristics include: while meeting the requirements of a normal pressure reducing valve, it can operate normally in temperatures between -55°C and 80°C; it can function normally outdoors in rainy and snowy environments; and it offers both automatic and manual drainage.

[0008] The specific working principle of this utility model is as follows: When high-pressure gas is connected, the gas is first centrifuged by the turbulence ring to remove some particulate impurities. The gas is then filtered through a filter to remove impurities such as water, oil, and fine dust. The main valve opening is then adjusted by adjusting the screw to produce a certain pressure loss, thereby achieving the purpose of reducing pressure. When the output pressure exceeds the set pressure, the outlet pressure is transmitted to the diaphragm through the feedback port, causing the diaphragm to move upward. At this time, the center hole of the diaphragm assembly, which is pressed down, opens, and exhaust begins to reduce the outlet pressure. Simultaneously, the valve stem moves upward under the action of the spring force, reducing the main valve opening and increasing the pressure loss. Once the outlet pressure drops to the required level, the valve stem pushes the connecting rod to mate with the sealing ring in the center hole of the diaphragm assembly, and the system is rebalanced.

[0009] The side of the adjustment spring 8 is equipped with a rain shield. The shield's operating principle: It features an exhaust port that points vertically downward. Multiple internal vents prolong the time it takes for rainwater to enter the seat, allowing it to accumulate and drain out of the valve body through gravity. Alternatively, the exhaust is blown out of the valve body during self-regulation. This provides a significant degree of rain protection. A filter screen is located beneath the shield to prevent insects and dust particles from entering the valve body.

[0010] The benefits of this utility model include low operating temperatures and a wide temperature range. It is rainproof and can be used outdoors without the need for a rain cover. It also features a semi-automatic drainage function, making it practical and convenient. The drainage port utilizes a standard M14x1 thread, allowing for installation of other components of this product, such as the automatic drain and manual drain components. The modular design features a standard M6x0.5 threaded exhaust port, and the rain shield can be replaced with components such as a muffler and filter depending on the operating environment. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the structure of the utility model;

[0012] Figure 2 It is a schematic diagram of the drainage device of the present utility model;

[0013] Figure 3 It is a schematic diagram of a rainproof device of the present utility model.

[0014] Figure 4 This is a schematic diagram of the structure of the utility model ( Figure 1 90-degree cross-sectional view). DETAILED DESCRIPTION

[0015] To make the objectives, technical solutions, and advantages of the present invention more clearly apparent, the present invention is further described in detail below with reference to the accompanying drawings and examples. However, it should be understood that the specific embodiments described herein are merely illustrative of the present invention and are not intended to limit the scope of the present invention. Furthermore, descriptions of known structures and technologies are omitted in the following description to avoid unnecessary confusion regarding the concepts of the present invention.

[0016] like Figure 1-3 As shown, it includes a valve cover 1, a diaphragm assembly 2, a valve stem assembly 3, a filter assembly 4, and a semi-automatic drainage assembly 5 (detailed components are Figure 2 Given), rain protection device 6 (detailed components are given by Figure 3Given), spring seat 7, adjusting spring 8, mounting plate 9, panel nut 10, main valve body 11, connecting rod 12, connecting seat 13, spoiler ring 14, auxiliary spring 15, cup body 16, pressure gauge 17, waterproof O-ring 18, locking nut 19, adjusting screw 20; valve cover 1 is the upper connection part of the valve, diaphragm assembly 2 is the valve pressure relief feedback sealing element, valve stem assembly controls the switch valve of the main valve port, filter assembly 4 filters impurities in the air, semi-automatic drainage assembly 5 discharges water in the cup body at the bottom of the valve body, rainproof device 6 prevents rainwater from entering the valve body, spring seat 7 is used Fix the spring, adjust the spring 8 to adjust the output pressure of the pressure reducing valve, the mounting plate 9 is the connector for the installation position of the pressure reducing valve, the panel nut 10 is used to fix the mounting plate, the main valve body 11 is the main structure of the pressure reducing valve, the connecting rod 12 is the element for transmitting force, the connecting seat 13 is the connection between the valve body and the filter assembly, the spoiler ring 14 makes the air do centrifugal motion, the auxiliary spring 15 is in the normal position to close the valve port, the cup body 16 is used to store water, the pressure gauge 17 detects the outlet pressure, the waterproof O-ring 18 is used to lock the nut to waterproof, the locking nut 19 fixes the position of the adjusting screw, and the adjusting screw 20 adjusts the force of the spring compression.

[0017] The valve cover 1 is the upper connecting part of the valve, the diaphragm assembly 2 is the valve pressure reducing feedback sealing element, the valve stem assembly controls the on-off valve of the main valve port, the filter assembly 4 filters impurities in the air, the semi-automatic drain assembly 5 discharges water in the cup body at the bottom of the valve body, the rainproof device 6 prevents rainwater from entering the valve body, the spring seat 7 is used to fix the spring, the adjusting spring 8 adjusts the output pressure of the pressure reducing valve, the mounting plate 9 is a connecting part at the installation position of the pressure reducing valve, the panel nut 10 is used to fix the mounting plate, the main valve body 11 is the main structure of the pressure reducing valve, the connecting rod 12 is the element for transmitting force, the connecting seat 13 is the connection between the valve body and the filter assembly, the spoiler ring 14 makes the air do centrifugal motion, the auxiliary spring 15 is in the normal position to close the valve port, the cup body 16 is used to store water, the pressure gauge 17 (and the corresponding installation port for measuring pressure) detects the outlet pressure, the waterproof O-ring 18 is used to lock the nut to waterproof, the locking nut 19 fixes the position of the adjusting screw, and the adjusting screw 20 adjusts the compression force of the spring.

[0018] Figure 4 The inlet and outlet are given in the figure. The directly connected passage is through the filter element of the filter component, and the passage diameter is 10mm.

[0019] The third O-ring 61 is used to seal the rainproof device, the exhaust screw 62 is used for gas exhaust, the rainproof seat 63 is used for rainproof device, and the filter screen 64 is used to filter impurities.

[0020] The main valve body is provided with a rainproof device on the side where the adjusting spring is installed: the rainproof device includes a rainproof seat, a third O-ring, an exhaust screw, and a rainproof seat filter; an exhaust port is provided on the rainproof seat, and the exhaust port is directed vertically downward. The seal of the third O-ring rainproof device and the exhaust screw are installed at the exhaust port for gas exhaust, and a filter is provided under the exhaust port for filtering impurities.

[0021] The semi-automatic drainage assembly 5 includes a drain seat 51 as the main body of the drainage part, a reset spring 54, a drain rod, a first O-ring 52, and a second O-ring. The drain seat 51 is provided with a drainage through hole; the first O-ring is used to seal between the drain seat and the cup body, the second O-ring 53 is used to seal between the drain rod and the hole in the drain seat, the drain rod 55 is used for drainage or sealing, and the retaining spring 56 is used to clamp and fix the drain rod; the reset spring 54 is sleeved on the drain rod 55, and a first O-ring 52 is provided between the drain rod and the through hole on the drain seat 51.

[0022] Semi-automatic drainage assembly 5 (detailed components by Figure 2 Given); the semi-automatic drainage assembly 5 includes a drain seat 51 as the main body of the drainage part, a return spring 54, a drain rod, a first O-ring 52, a second O-ring, and a drainage through-hole is provided on the drain seat 51; the first O-ring is used to seal between the drain seat and the cup body, the second O-ring 53 is used to seal between the drain rod and the hole in the drain seat, the drain rod 55 is used for drainage or sealing, and the retaining spring 56 is used to clamp and fix the drain rod; the return spring 54 is sleeved on the drain rod 55, and a first O-ring 52 is provided between the drain rod and the through-hole on the drain seat 51. Principle of semi-automatic drainage: When the valve body of this device is connected to high-pressure gas, the drain rod moves downward to form a seal with the O-ring to prevent gas leakage. When the intake pressure is lower than a certain value, the return spring pushes the exhaust rod upward to achieve drainage. At the same time, the drain rod can also be moved upward by manually pushing the drain rod to achieve drainage.

[0023] The working principles adopted by the existing filter pressure reducing valve industry are the same. The manual drainage working mode cannot meet the modern daily working conditions, nor can it guarantee normal use in low temperature and outdoor rainy and snowy weather. Therefore, the existing products cannot take into account all of the above situations at the same time.

[0024] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent replacements or improvements made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A low temperature filtering pressure reducing valve, characterized in that: It includes a valve body assembly, an adjustment assembly, a cup assembly and a semi-automatic drainage assembly; the valve body assembly includes a main valve body, a valve cover, a diaphragm assembly, a filter assembly, a rainproof device, a valve stem assembly, a spring seat, an adjustment spring, a connecting rod, a connecting seat, a spoiler ring and a secondary spring; the lower end of the main valve body is connected to the cup body, the valve cover is fixed to the upper neck of the main valve body, the middle hole of the valve cover extends an adjustment screw, and the lower end of the adjustment screw is respectively installed with an adjustment spring, a diaphragm assembly, a valve stem assembly and a connecting rod in sequence; the left and right sides of the main valve body are provided with an inlet and outlet of the valve, and a connecting passage is provided between the inlet and outlet in the main valve body; the diaphragm assembly is pressed on the connecting passage in the center of the main valve body, the vertical elastic adjustment spring presses the diaphragm assembly at the top and fixes the valve stem assembly with it at the bottom, the connecting rod is connected to the bottom of the valve stem assembly, and the spring seat circles the adjustment spring above the adjustment spring; the passage directly connected to the inlet and outlet passes through the filter element of the filter assembly, and the passage diameter is greater than 9 mm; a cup body of the same diameter is fixed below the valve body, the connecting rod is located in the center of the cup body, and a filter is installed around the bottom of the connecting rod; the bottom of the cup body is equipped with a semi-automatic drainage assembly.

2. The low temperature filtering pressure reducing valve according to claim 1 is characterized in that the main A rainproof device is provided on the side of the valve body where the adjusting spring is installed: the rainproof device includes a rainproof seat, a third O-ring, an exhaust screw and a rainproof seat filter; an exhaust port is provided on the rainproof seat, the exhaust port is directed vertically downward, the third O-ring is the seal of the rainproof device, the exhaust screw is installed at the exhaust port for gas exhaust, and a filter is provided below the exhaust port.

3. The low temperature filtering pressure reducing valve according to claim 1, characterized in that: The semi-automatic drainage assembly includes a drain seat as the main body of the drain part, a reset spring, a drain rod, a first O-ring, a retaining spring, and a second O-ring. The drain seat is provided with a drainage through hole; the first O-ring is used to seal between the drain seat and the cup body, the second O-ring is used to seal between the drain rod and the hole in the drain seat, the drain rod is used for drainage or sealing, and the retaining spring clamps and fixes the drain rod; the reset spring is sleeved on the drain rod, and a first O-ring is provided between the drain rod and the through hole on the drain seat.

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