Pressure reducing valve element without sealing ring

Abstract

The utility model relates to the field of pressure reducing valves, in particular to a pressure reducing valve element without a sealing ring, which comprises a valve element assembly used for adjusting flow in a pipeline, a valve rod used for transmitting kinetic energy is assembled on the valve element assembly, the valve element assembly comprises a valve element body located in a pressure reducing valve channel, and a valve element end face is formed at the upper end of the valve element body in a turning mode. According to the utility model, the original sealing groove for placing the sealing ring is removed through turning, and then the sealing ring and the sealing groove are removed, so that the copper processing surface is smooth and clean, and can completely resist the impact of 0.3-0.7 MPa gas pressure, thereby effectively avoiding the occurrence of gas pressure fluctuation, and improving the reliability of the valve. The DTY filament is degraded due to network air pressure fluctuation, meanwhile, the cost for maintaining and replacing a sealing piece is reduced through the valve element body 11 without the sealing ring, and under the proper application condition, the valve element body without the sealing ring has the longer service life and the more stable operation performance.

Description

Technical Field

[0001] The utility model relates to the field of pressure reducing valves, in particular to a pressure reducing valve core without a sealing ring. Background Art

[0002] A pressure reducing valve is a device used to reduce fluid pressure. It usually consists of a main valve body used to guide the fluid through and reduce its pressure, a valve core used to adjust the fluid pressure, a spring used to provide the reaction force on the valve core, and a knob, handle or electric actuator to adjust the working state of the pressure reducing valve and the regulating device of the output pressure. These parts work together to enable the pressure reducing valve to stably control the pressure of the fluid, ensuring that it plays a key role in industries or pipeline systems that need to reduce pressure.

[0003] The existing model of the pressure reducing valve is SMC AR825-20, which is widely used in the texturing workshop. There are 504 of them in just one workshop. The pressure reducing valve is used on the 0.3-0.7MPa network compressed air pipeline to adjust the pressure. With long-term use, the valve core sealing ring in the pressure reducing valve has shown signs of damage. When a gap appears in the damage trace, air pressure fluctuations will occur, causing the DTY wire to be degraded due to the network air pressure fluctuation. To solve this problem, the usual method is to replace the pressure reducing valve as a whole, or purchase an original new valve core for replacement. These methods will invest a lot of money, resulting in high maintenance costs. Utility Model Content

[0004] In view of this, the purpose of the utility model is to propose a pressure reducing valve core without a sealing ring, so as to solve the technical problem that after long-term use of the existing pressure reducing valve, the valve core sealing ring in the pressure reducing valve will be damaged. In order to avoid air pressure fluctuations, a new pressure reducing valve is usually replaced, resulting in high maintenance costs.

[0005] Based on the above purpose, the utility model provides a pressure reducing valve core without a sealing ring, including a valve core assembly for adjusting the flow in a pipeline, a valve stem for transmitting kinetic energy is mounted on the valve core assembly, and an auxiliary assembly matching the valve core assembly is disposed at the upper end of the valve stem;

[0006] The valve core assembly comprises a valve core body located in the pressure reducing valve passage, a valve core end face is formed by turning at the upper end of the valve core body, a mounting hole for matching with the valve stem is provided on the surface of the valve core end face, a first through hole is also provided on the surface of the valve core end face, a mounting sheet is provided inside the valve core body, and a reset spring is provided on the bottom surface of the mounting sheet;

[0007] The valve stem comprises a first stem portion and a second stem portion, wherein the second stem portion is located inside the valve core body, and a retaining ring groove which is engaged with the mounting plate is provided on the surface of the second stem portion.

[0008] Preferably, a rubber ring is sleeved on the bottom end of the valve core body, and a second through hole penetrating the valve stem is opened inside the valve stem.

[0009] Preferably, the auxiliary component comprises a diaphragm, a relief valve seat is arranged on the surface of the diaphragm, and a connecting pipe matching the second through hole is arranged at the bottom end of the relief valve seat.

[0010] Preferably, the upper and lower surfaces of the diaphragm are respectively provided with a shell and a bottom cover for fixing it, the shell is provided with an exhaust hole, the bottom cover is provided with a circular hole for the valve stem to pass through, and the bottom cover is also provided with an air inlet hole.

[0011] Preferably, a threaded rod is provided inside the shell, and a blocking piece is fixed to the bottom end of the threaded rod.

[0012] Preferably, a pressure regulating spring is fixedly provided on the upper end of the overflow valve seat, the baffle is connected to the top end of the pressure regulating spring, and a knob is fixedly provided on the upper end of the threaded rod.

[0013] Preferably, the overflow valve seat is a component made of plastic material.

[0014] Preferably, the diameter of the first rod portion is greater than that of the second rod portion, the length of the second rod portion is greater than the height of the valve core body, and the distance from the retaining ring groove to the bottom surface of the first rod portion is greater than the height of the valve core end surface.

[0015] Preferably, the inner diameter of the second through hole is larger than the outer diameter of the connecting pipe.

[0016] Preferably, the valve core body and the valve stem are both made of brass.

[0017] Beneficial effects of the utility model:

[0018] The utility model removes the sealing groove for placing the original sealing ring by turning, so that the thickness of the valve core end face at the upper end of the valve core body becomes 4cm, which is 2cm thinner than the end face of the valve core of the SMC AR925-20 pressure reducing valve, which means that the valve core end face does not need to use a sealing ring, and after removing the sealing ring and the sealing groove, the copper machined surface is flat and smooth, which can fully resist the impact of 0.3-0.7MPa gas pressure, and effectively avoids the occurrence of air pressure fluctuations, which causes the DTY wire to be degraded due to network air pressure fluctuations. At the same time, the valve core body without a sealing ring can be applied to certain corrosive pipe connections, and the valve core body without a sealing ring reduces the cost of maintenance and replacement of seals. Under appropriate application conditions, the valve core body without a sealing ring has a longer service life and more stable operating performance. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the present invention or the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only for the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0020] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0021] Figure 2 This is a schematic diagram of the valve core body structure of the utility model;

[0022] Figure 3 This is a schematic diagram of the valve stem structure of the utility model;

[0023] Figure 4 This is a schematic diagram of the structure of the diaphragm and the overflow valve seat of the utility model;

[0024] Figure 5 This is a schematic diagram of the bottom structure of the overflow valve seat of the utility model;

[0025] Figure 6 This is a schematic diagram of the structure of the housing and threaded rod of the utility model;

[0026] The numbers in the figure are: 1. valve core assembly; 11. valve core body; 12. valve core end face; 121. assembly hole; 122. first through hole; 13. rubber ring; 14. mounting plate; 141. reset spring; 2. valve stem; 21. first rod portion; 22. second rod portion; 221. retaining ring groove; 23. second through hole; 3. auxiliary assembly; 31. diaphragm; 32. overflow valve seat; 321. connecting pipe; 33. pressure regulating spring; 34. outer shell; 341. exhaust hole; 35. bottom cover; 351. round hole; 352. air inlet hole; 36. threaded rod; 361. baffle; 362. knob. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with specific embodiments.

[0028] It should be noted that, unless otherwise defined, the technical terms or scientific terms used in the present invention should be understood by people with ordinary skills in the field to which the present invention belongs. The words "first", "second" and similar words used in the present invention do not indicate any order, quantity or importance, but are only used to distinguish different components. "Include" or "comprise" and similar words mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. "Connect" or "connected" and similar words are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the described object changes, the relative positional relationship may also change accordingly.

[0029] In order to further understand the present invention, the present invention will be described in detail below in conjunction with the accompanying drawings.

[0030] Combination Figure 1-Figure 3 The utility model provides a pressure reducing valve core without a sealing ring, comprising a valve core assembly 1 for regulating the flow in a pipeline, a valve stem 2 for transmitting kinetic energy is mounted on the valve core assembly 1, and an auxiliary assembly 3 matching the valve core assembly 1 is disposed at the upper end of the valve stem 2;

[0031] The valve core assembly 1 includes a valve core body 11 located in the pressure reducing valve channel, a valve core end face 12 is formed by turning at the upper end of the valve core body 11, a mounting hole 121 for matching with the valve stem 2 is provided on the surface of the valve core end face 12, a first through hole 122 is also provided on the surface of the valve core end face 12, a mounting sheet 14 is provided inside the valve core body 11, and a return spring 141 is provided on the bottom surface of the mounting sheet 14;

[0032] The valve stem 2 includes a first stem portion 21 and a second stem portion 22. The second stem portion 22 is located inside the valve core body 11. A retaining ring groove 221 is formed on the surface of the second stem portion 22 to be engaged with the mounting plate 14.

[0033] In this embodiment, the thickness of the valve core end face 12 at the upper end of the valve core body 11 is 4 cm, which is 2 cm thinner than the end face of the valve core of the SMC AR925-20 pressure reducing valve. The valve core end face 12 is turned to remove the sealing groove for placing the sealing ring, which means that the valve core end face 12 does not need to use a sealing ring. After removing the sealing ring and the sealing groove, the copper processing surface is smooth and can fully resist the impact of the gas pressure of 0.3-0.7 MPa, effectively avoiding the occurrence of air pressure fluctuations, resulting in the degradation of the DTY wire due to network air pressure fluctuations. At the same time, the valve core body 11 without a sealing ring can be applied to some corrosive pipe connections. The valve core body 11 without a sealing ring reduces the cost of maintenance and replacement of seals. Under appropriate application conditions, the valve core body 11 without a sealing ring may have a longer life and more stable operating performance;

[0034] Furthermore, the first through hole 122 is used to balance the internal and external pressure difference of the valve core body 11 itself, so that the valve core body 11 can move normally inside the valve body. At the same time, the return spring 141 inside the valve core body 11 can make the valve core body 11 return to its original position after the valve core body 11 stops working, so as to avoid the fluid passing through the valve body being affected.

[0035] It should be noted that the valve core assembly 1 is located inside the main valve body of the pressure reducing valve, and the internal structure of the main valve body is prior art, and no schematic diagram or specific description is provided in the present utility model.

[0036] In the combined figure, the bottom end of the valve core body 11 is sleeved with a rubber ring 13, and the valve stem 2 is provided with a second through hole 23 penetrating the body thereof;

[0037] In this embodiment, the provision of the rubber ring 13 can increase the sealing performance of the valve core body 11 on the one hand, and balance the movement rate of the valve core body 11 on the other hand. The second through hole 23 inside the valve stem 2 can be used to install accessories used in conjunction with the valve body.

[0038] Combination Figure 4 The auxiliary component 3 includes a diaphragm 31, a relief valve seat 32 is provided on the surface of the diaphragm 31, and a connecting pipe 321 matching the second through hole 23 is provided at the bottom end of the relief valve seat 32;

[0039] In this embodiment, the diaphragm 31 in the pressure reducing valve plays a role in regulating and controlling the fluid pressure. Specifically, the pressure reducing valve adjusts the degree of opening or closing of the valve through the elastic deformation of the diaphragm 31, so that the fluid reaches a set pressure when passing through the valve. The diaphragm 31 can automatically adjust the opening and closing of the valve according to the change of the fluid pressure to stabilize and control the fluid pressure in the system and ensure that it works within the set range.

[0040] Furthermore, the overflow valve seat 32 is usually a fixed component used to support and position the diaphragm 31, and is used to support and position the valve core or valve plate. After being subjected to fluid pressure, the overflow valve seat 3 moves or opens to adjust the flow or pressure of the fluid. The connecting tube 321 can cooperate with the valve core body 11 to discharge the pressure inside the valve body.

[0041] Combination Figure 6 The upper and lower surfaces of the diaphragm 31 are respectively provided with a shell 34 and a bottom cover 35 for fixing it, the shell 34 is provided with an exhaust hole 341, the bottom cover 35 is provided with a circular hole 351 for the valve stem 2 to pass through, and the bottom cover 35 is also provided with an air inlet hole 352;

[0042] In this embodiment, the exhaust hole 341 on the outer shell 34 achieves the effect of decompression by discharging excess fluid inside the pipeline, and the air inlet hole 352 on the bottom cover 35 is used to deliver the fluid inside the pipeline and the valve body into the chamber formed by the outer shell 34 and the bottom cover 35. As the valve core body 11 moves up and down during the decompression process, the diaphragm 31 will also make corresponding deformations in the chamber.

[0043] Combination Figure 6 , a threaded rod 36 is provided inside the housing 34, and a baffle 361 is fixed to the bottom end of the threaded rod 36;

[0044] In this embodiment, the initial position of the valve core body 11 can be changed by adjusting the rotation of the threaded rod 36, thereby adjusting the size of the pressure reducing channel opening of the valve core body 11, thereby affecting the fluid pressure or flow passing through the valve. This adjustment function enables the pressure reducing valve to accurately control the output pressure of the fluid as needed.

[0045] Combination Figure 4 A pressure regulating spring 33 is fixedly provided at the upper end of the overflow valve seat 32, a baffle 361 is connected to the top of the pressure regulating spring 33, and a knob 362 is fixedly provided at the upper end of the threaded rod 36;

[0046] In this embodiment, the pressure-regulating spring 33 is mainly used to set the working pressure range of the pressure reducing valve and the stability of the regulated pressure. By setting the working pressure range, the pressure-regulating spring 33 can determine the minimum working pressure when the pressure reducing valve starts to work. The elastic coefficient of the pressure-regulating spring 33 determines the pressure at which the valve starts to open, thereby allowing fluid to pass through to reduce the pressure to the set output pressure. At the same time, the pressure-regulating spring 33 can enable the pressure reducing valve to be quickly adjusted to maintain a stable output pressure. The baffle 361 is used to fix the initial compression position of the pressure-regulating spring 33. The threaded rod 36 is rotated by turning the knob 362, and the initial pressure value applied by the pressure-regulating spring 33 to the valve core body 11 can be adjusted in combination with the nut.

[0047] Combination Figure 4 , the overflow valve seat 32 is a component made of plastic material;

[0048] In this embodiment, the overflow valve seat 32 is made of plastic. Plastic generally has excellent corrosion resistance and can resist erosion by a variety of chemicals. At the same time, plastic is lighter than metal and can be easily processed into complex shapes and structures. During the use of the pressure reducing valve, the overflow valve seat 32 made of plastic can reduce the noise and vibration of the valve during operation, thereby improving the comfort and stability of use.

[0049] Combination Figure 3 , the diameter of the first rod portion 21 is greater than that of the second rod portion 22, the length of the second rod portion 22 is greater than the height of the valve core body 11, and the distance from the retaining ring groove 221 to the bottom surface of the first rod portion 21 is greater than the height of the valve core end surface 12;

[0050] In this embodiment, the diameter of the first rod portion 21 is larger than that of the second rod portion 22 so that the valve stem 2 can better cooperate with the valve core body 11 to avoid the valve core body 11 being unable to effectively drive the valve stem 2 to perform corresponding operations during the movement. The retaining spring groove 221 on the second rod portion 22 is moved up by 2 cm compared to the retaining spring groove 221 on the existing SMC AR925-20 pressure reducing valve, so as to better cooperate with the valve core body 11.

[0051] Combination Figure 3 and Figure 5 , the inner diameter of the second through hole 23 is greater than the outer diameter of the connecting pipe 321;

[0052] In this embodiment, when the inner diameter of the second through hole 23 is larger than the outer diameter of the connecting pipe 321, there will be a certain gap between the two. When the pressure inside the valve body is too high, part of the fluid will enter from the gap and be discharged through the connecting pipe 321 and the exhaust hole 341, thereby achieving the purpose of pressure reduction.

[0053] Combination Figure 1 The valve core body 11 and the valve stem 2 are both made of brass.

[0054] In this embodiment, the valve core body 11 and the valve stem 2 are made of brass and have good corrosion resistance. They can resist water, air, many chemicals and their corrosion. At the same time, brass is easy to be processed into complex shapes and is suitable for manufacturing parts such as the valve core body 11 and the valve stem 2 that require precise dimensions and surface quality. It can obtain parts of different forms through casting, cold forging or machining, and brass has high hardness and wear resistance, can withstand the wear caused by long-term use and frequent operation, and extend the service life.

[0055] Those skilled in the art should understand that the discussion of any of the above embodiments is merely illustrative and is not intended to imply that the scope of the present invention (including the claims) is limited to these examples. Under the concept of the present invention, the technical features in the above embodiments or different embodiments may be combined, the steps may be implemented in any order, and there are many other variations of the different aspects of the present invention as described above, which are not provided in detail for the sake of simplicity.

[0056] The utility model is intended to cover all such substitutions, modifications and variations that fall within the broad scope of the appended claims. Therefore, any omissions, modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the utility model should be included in the scope of protection of the utility model.

Claims

1. A pressure reducing valve core without a sealing ring, characterized in that: It includes a valve core assembly for regulating the flow in the pipeline, the valve core assembly is equipped with a valve stem for transmitting kinetic energy, and the upper end of the valve stem is provided with an auxiliary assembly that matches the valve core assembly; The valve core assembly comprises a valve core body located in the pressure reducing valve passage, a valve core end face is formed by turning at the upper end of the valve core body, a mounting hole for matching with the valve stem is provided on the surface of the valve core end face, a first through hole is also provided on the surface of the valve core end face, a mounting sheet is provided inside the valve core body, and a reset spring is provided on the bottom surface of the mounting sheet; The valve stem comprises a first stem portion and a second stem portion, wherein the second stem portion is located inside the valve core body, and a retaining ring groove which is engaged with the mounting plate is provided on the surface of the second stem portion.

2. A pressure reducing valve core without a sealing ring according to claim 1, characterized in that: A rubber ring is sleeved on the bottom end of the valve core body, and a second through hole penetrating through the valve stem is opened inside the valve stem.

3. A pressure reducing valve core without a sealing ring according to claim 2, characterized in that: The auxiliary component comprises a diaphragm, a relief valve seat is arranged on the surface of the diaphragm, and a connecting pipe matching the second through hole is arranged at the bottom end of the relief valve seat.

4. A pressure reducing valve core without a sealing ring according to claim 3, characterized in that: The upper and lower surfaces of the diaphragm are respectively provided with a shell and a bottom cover for fixing the diaphragm. The shell is provided with an exhaust hole, the bottom cover is provided with a round hole for the valve stem to pass through, and the bottom cover is also provided with an air inlet hole.

5. A pressure reducing valve core without a sealing ring according to claim 4, characterized in that: A threaded rod is arranged inside the shell, and a blocking piece is fixed at the bottom end of the threaded rod.

6. A pressure reducing valve core without a sealing ring according to claim 5, characterized in that: A pressure regulating spring is fixedly arranged on the upper end of the overflow valve seat, a baffle is connected to the top end of the pressure regulating spring, and a knob is fixedly arranged on the upper end of the threaded rod.

7. A pressure reducing valve core without a sealing ring according to claim 6, characterized in that: The overflow valve seat is a component made of plastic material.

8. The pressure reducing valve core without a sealing ring according to claim 1, characterized in that: The diameter of the first rod portion is greater than that of the second rod portion, the length of the second rod portion is greater than the height of the valve core body, and the distance from the retaining ring groove to the bottom surface of the first rod portion is greater than the height of the valve core end surface.

9. The pressure reducing valve core without sealing ring according to claim 3, characterized in that: The inner diameter of the second through hole is larger than the outer diameter of the connecting pipe.

10. The pressure reducing valve core without sealing ring according to claim 1, characterized in that: The valve core body and the valve stem are both parts made of brass.

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