Pressure regulating mechanism and pilot operated breather valve

Abstract

The utility model relates to the technical field of pilot type breather valve, especially a pressure regulating mechanism and pilot type breather valve, including pressurizing subassembly, the pressurizing subassembly includes the casing, and the spring shaft of sliding in the inside of casing, wherein, the casing has upper connecting surface and lower connecting surface, the spring shaft has upper end surface and lower end surface, the length between upper end surface and lower end surface is A, the length between upper connecting surface and lower connecting surface is B, and A greater than or equal to B. The utility model discloses the bearing stacking connection between pressurizing subassembly, realizes the quick regulation of pilot type breather valve pressure, makes the pressure regulation not to be influenced by the limitation of pressure spring, and the mode of cooperation screw thread rotary regulation pressure spring compression variable, can use the mode of a plurality of pressurizing subassembly stacking connection under the condition of exceeding pressure spring compression range, when being in pressure spring compression range, can use the mode of rotary regulation and adjust the compression variable of pressure spring, increase the flexibility of device.

Description

Technical Field

[0001] This utility model relates to the field of pilot-operated breathing valve technology, and in particular to a pressure regulating mechanism and a pilot-operated breathing valve. Background Technology

[0002] In the pilot structure of a pilot-operated breather valve, the spring is the core pressure control element. Its core function is to set the opening pressure threshold of the pilot valve through its own preload, which directly determines the response accuracy of the entire breather valve to the tank pressure.

[0003] The adjusting nut is a key component for adjusting the spring preload. By rotating the adjusting nut, the spring compression can be changed. For example, rotating it clockwise increases the spring compression and preload, requiring the pilot valve to open with a higher positive pressure or a lower negative pressure. Rotating it counterclockwise decreases the compression and preload, lowering the pilot valve opening pressure. Ultimately, this mechanism controls the main valve to stabilize the tank pressure.

[0004] However, this adjustment method using an adjusting nut has limitations. Because the spring pressure is limited, it cannot be adjusted indefinitely when the spring compression variable needs to be changed by rotating the adjusting nut. This means that the adjustment of the spring preload can only be done within the spring's compression range. If the spring preload needs to be adjusted beyond the spring's compression range, it cannot be achieved by adjusting the nut. Therefore, improvements are needed. Summary of the Invention

[0005] In this section, as well as in the abstract and title of this application, some simplifications or omissions may be made to avoid obscuring the purpose of this section, the abstract, and the title of this application, and such simplifications or omissions shall not be used to limit the scope of this utility model.

[0006] To address the shortcomings of existing technologies, the purpose of this utility model is to provide a pressure regulating mechanism and a pilot-operated breathing valve.

[0007] To achieve the above objectives, the present invention adopts the following technical solution: a pressure regulating mechanism, comprising a pressurizing component, the pressurizing component comprising a housing and a spring shaft slidably disposed inside the housing; wherein, the housing has an upper connecting surface and a lower connecting surface, the spring shaft has an upper end surface and a lower end surface, the length between the upper end surface and the lower end surface is A, the length between the upper connecting surface and the lower connecting surface is B, and A≥B.

[0008] In a preferred embodiment of the pressure regulating mechanism of this utility model, the upper end surface is higher than the upper connecting surface, the lower end surface is higher than the lower connecting surface, and A≥B.

[0009] In a preferred embodiment of the pressure regulating mechanism of this utility model, the upper end face is lower than the upper connecting surface, the lower end face is lower than the lower connecting surface, and A≥B.

[0010] In a preferred embodiment of the pressure regulating mechanism of this utility model, the upper end surface is higher than the upper connecting surface, the lower end surface is lower than the lower connecting surface, and A>B.

[0011] In a preferred embodiment of the pressure regulating mechanism of this utility model, the upper end face is flush with the upper connecting surface, the lower end face is flush with the lower connecting surface, and A = B.

[0012] In a preferred embodiment of the pressure regulating mechanism of this utility model, the housing is provided with a convex ring that is lower than the lower connecting surface, the outer diameter of the convex ring is equal to the inner diameter of the housing, and the outer diameter of the upper connecting surface is equal to the outer diameter of the lower connecting surface.

[0013] In a preferred embodiment of the pressure regulating mechanism of this utility model, the pressurizing component further includes a connecting seat, which is fixedly connected to the inner wall of the housing and slidably connected to the spring shaft.

[0014] In a preferred embodiment of the pressure regulating mechanism of this utility model, the pressurizing component further includes a sliding seat and a pressure spring; the sliding seat is fixedly connected to the spring shaft; the pressure spring is sleeved on the spring shaft and provides axial preload to the spring shaft; wherein one end of the pressure spring acts on the connecting seat and the other end acts on the sliding seat.

[0015] To achieve the above objectives, the present invention also adopts the following technical solution: a pilot-operated breathing valve, comprising a plurality of the aforementioned pressurizing components, and further comprising a valve body connected to the housing and communicating with the interior of the housing; a pressure fine-tuning component disposed inside the housing; wherein, a pilot shaft is disposed inside the valve body, the top end of the pilot shaft being in rigid contact with the lower end face of the spring shaft connected to the housing, thereby forming a gap H between the sliding seat and the bottom of the housing cavity, and H>0.

[0016] In a preferred embodiment of the pilot-operated breathing valve of this utility model, the pressure fine-tuning component includes a bearing disposed on the sliding seat and connected to the end of the pressure spring, and the sliding seat is threadedly connected to the inner wall of the housing.

[0017] The beneficial effects of this pressure regulating mechanism and pilot-operated breather valve are as follows: By allowing the pressurizing components to be stacked and connected by bearings, not only can the pressure of the pilot-operated breather valve be quickly regulated, but the pressure regulation is also unaffected by the limitations of the pressure spring. Combined with the method of adjusting the compression variable of the pressure spring by rotating the thread, the device can use multiple pressurizing components stacked and connected when the pressure spring compression range is exceeded, while when it is within the pressure spring compression range, the compression variable of the pressure spring can be adjusted by rotation, increasing the flexibility of the device's pressure regulation. Attached Figure Description

[0018] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the housing and spring shaft of this utility model.

[0020] Figure 2 This is a schematic diagram showing the lengths of the housing and the spring shaft of this utility model.

[0021] Figure 3 This is a schematic diagram showing the connection of multiple pressurizing components of this utility model.

[0022] Figure 4 These are schematic diagrams illustrating various preferred configurations when the lengths of the spring shaft and the housing are equal.

[0023] Figure 5 These are schematic diagrams illustrating various preferred configurations when the length of the spring shaft is greater than the length of the housing.

[0024] Figure 6 This is a schematic diagram of the valve body of this utility model.

[0025] Figure 7 This is a schematic diagram showing the connection between a single pressurizing component and the valve body of this utility model.

[0026] Figure 8 This is a schematic diagram showing the connection between the multiple pressurizing components and the valve body of this utility model.

[0027] Figure 9 This is a schematic diagram of the overall structure of this utility model. Detailed Implementation

[0028] To enable those skilled in the art to better understand this utility model, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0029] The terminology used in this invention refers to those general terms currently widely used in the art in consideration of the functionality of this invention; however, these terms may vary according to the intent, precedent, or new technology of those skilled in the art. Furthermore, specific terms may be chosen by the applicant, and in such cases, their detailed meanings will be described in the detailed description of this invention. Therefore, the terminology used in this specification should not be construed as simple names, but rather based on the meaning of the terms and the overall description of this invention.

[0030] Reference Figures 1-3 This embodiment provides a pressure regulating mechanism, including a pressurizing component 100. The pressurizing component 100 includes a housing 101 and a spring shaft 102 slidably disposed inside the housing 101. The housing 101 has an upper connecting surface R1 and a lower connecting surface R2, and the spring shaft 102 has an upper end surface S1 and a lower end surface S2. The length between the upper end surface S1 and the lower end surface S2 is A, and the length between the upper connecting surface R1 and the lower connecting surface R2 is B, and A≥B.

[0031] Furthermore, a protruding ring 103 is provided on the housing 101 below the lower connecting surface R2. The outer diameter of the protruding ring 103 is equal to the inner diameter of the housing 101, and the outer diameter of the upper connecting surface R1 is equal to the outer diameter of the lower connecting surface R2.

[0032] Since the outer diameters of the upper connecting surface R1 and the lower connecting surface R2 are equal, and the housing 101 is provided with a protruding ring 103 that is lower than the lower connecting surface R2, it means that the inner diameter of the lower connecting surface R2 is equal to the diameter of the housing 101. Therefore, the shapes of the upper connecting surface R1 and the lower connecting surface R2 are matched, so that multiple pressurizing components 100 can be stacked and connected axially through the upper connecting surface R1 and the lower connecting surface R2.

[0033] Specifically, since the pressure of the pressure spring 106 in a single pressure component 100 is limited, if it is necessary to adjust the pressure of the pressure component 100 to exceed the compression range of the pressure spring 106, multiple pressure components 100 can be axially stacked and connected to directly increase the pressure components, so that the total pressure of multiple pressure components can reach the required level, making pressure adjustment more convenient and faster.

[0034] When in use, assuming the pressure value of a single pressurizing component 100 is P1, and a pressure value of P1 + P2 is required, a pressure component with a pressure value of P2 can be directly added.

[0035] Since the total pressure value of multiple pressure components needs to reach a preset value when they are connected, the spring shafts 102 on the two pressure components need to transmit force. Therefore, when multiple pressure components are connected, it is necessary to ensure that the spring shafts 102 in the connected pressure components 100 form a rigid contact.

[0036] Specifically, only when the overall length of the spring shaft 102 (i.e. the length between the upper end face S1 and the lower end face S2) is greater than or equal to the length of the upper connecting surface R1 and the lower connecting surface R2 of the housing 101 can a rigid contact be formed between the spring shafts 102 in the connected pressurizing components 100 when multiple pressurizing components 100 are connected.

[0037] Reference Figures 4-5 This embodiment provides a pressure regulating mechanism, including an upper end surface S1 that is higher than the upper connecting surface R1, a lower end surface S2 that is higher than the lower connecting surface R2, and A≥B.

[0038] Preferably, the upper end surface S1 is lower than the upper connecting surface R1, the lower end surface S2 is lower than the lower connecting surface R2, and A≥B.

[0039] Preferably, the upper end surface S1 is higher than the upper connecting surface R1, the lower end surface S2 is lower than the lower connecting surface R2, and A>B.

[0040] Preferably, the upper end face S1 is flush with the upper connecting face R1, the lower end face S2 is flush with the lower connecting face R2, and A = B.

[0041] in, Figure 4 When (a1), (a2), and (a3) ​​are A = B, there are three preferred connections between the spring shaft 102 and the housing 101: like Figure 4 In section (a1): When A=B, the upper end face S1 of the spring shaft 102 is higher than the upper connecting face R1 of the housing 101, and the lower end face S2 of the spring shaft 102 is also higher than the lower connecting face R2 of the housing 101. When at least two pressurizing components 100 are axially stacked (i.e., the lower connecting face R2 of the housing 101 in the upper pressurizing component 100 is fixedly connected to the upper connecting face R1 of the housing 101 in the lower pressurizing component 100 by bolts or other tools), the lower end face S2 of the spring shaft 102 in the upper pressurizing component 100 and the upper end face S1 of the spring shaft 102 in the lower pressurizing component 100 can form a rigid contact. This allows the spring shaft 102 in the upper pressurizing component 100 to work with the spring shaft 102 in the lower pressurizing component to transmit pressure to the lower pilot component. This is a preferred method for connecting multiple pressurizing components 100.

[0042] like Figure 4In section (a2): When A = B, the upper end face S1 of the spring shaft 102 is flush with the upper connecting surface R1 of the housing 101, and the lower end face S2 of the spring shaft is flush with the lower connecting surface R2 of the housing 101. At this time, when at least two pressurizing components 100 are axially stacked, the lower end face S2 of the spring shaft 102 in the upper pressurizing component 100 and the upper end face S1 of the spring shaft 102 in the lower pressurizing component 100 can form rigid contact, thereby allowing the spring shaft 102 in the upper pressurizing component 100 to cooperate with the lower spring shaft 102 to transmit pressure to the lower pilot component. This is a preferred method for connecting multiple pressurizing components 100.

[0043] like Figure 4 In section (a3): When A=B, the upper end face S1 of the spring shaft 102 is lower than the upper connecting surface R1 of the housing 101, and the lower end face S2 of the spring shaft 102 is lower than the lower connecting surface R2 of the housing 101. In this case, when at least two pressurizing components 100 are axially stacked, the lower end face S2 of the spring shaft 102 in the upper pressurizing component 100 and the upper end face S1 of the spring shaft 102 in the lower pressurizing component 100 can form a rigid contact, thereby allowing the spring shaft 102 in the upper pressurizing component 100 to cooperate with the lower spring shaft 102 to transmit pressure to the lower pilot component. This is a preferred method for connecting multiple pressurizing components 100.

[0044] Furthermore, in the three preferred cases of A=B mentioned above, multiple sets of pressurizing components 100 are connected, and when the two connected spring shafts 102 are connected to the two housings 101, the lower end face S2 of the upper spring shaft 102 and the upper end face S1 of the lower spring shaft 102 can be rigidly contacted together, thereby achieving the purpose of pressure transmission.

[0045] in, Figure 5 When (b1), (b2), and (b3) are A>B, there are three preferred connections between the spring shaft 102 and the housing 101: like Figure 5 In section (b1): When A>B, the upper end face S1 of the spring shaft 102 is higher than the upper connecting surface R1 of the housing 101, and the lower end face S2 of the spring shaft 102 is higher than the lower connecting surface R2 of the housing 101. At this time, when at least two pressurizing components 100 are axially stacked, the lower end face S2 of the spring shaft 102 in the upper pressurizing component 100 and the upper end face S1 of the spring shaft 102 in the lower pressurizing component 100 can form rigid contact, thereby allowing the spring shaft 102 in the upper pressurizing component 100 to cooperate with the lower spring shaft 102 to transmit pressure to the lower pilot component. This is a preferred method for connecting multiple pressurizing components 100.

[0046] like Figure 5In section (b2): When A>B, the upper end face S1 of the spring shaft is lower than the upper connecting surface R1 of the housing 101, and the lower end face S2 of the spring shaft 102 is lower than the lower connecting surface R2 of the housing 101. In this case, when at least two pressurizing components 100 are axially stacked, the lower end face S2 of the spring shaft 102 in the upper pressurizing component 100 and the upper end face S1 of the spring shaft 102 in the lower pressurizing component 100 can form rigid contact, thereby allowing the spring shaft 102 in the upper pressurizing component 100 to cooperate with the lower spring shaft 102 to transmit pressure to the lower pilot component. This is a preferred method for connecting multiple pressurizing components 100.

[0047] like Figure 5 In section (b3): ​​When A>B, the upper end face S1 of the spring shaft 102 is higher than the upper connecting surface R1 of the housing 101, and the lower end face S2 of the spring shaft 102 is lower than the lower connecting surface R2 of the housing 101. In this case, when at least two pressurizing components 100 are axially stacked, the lower end face S2 of the spring shaft 102 in the upper pressurizing component 100 and the upper end face S1 of the spring shaft 102 in the lower pressurizing component 100 can form a rigid contact, thereby allowing the spring shaft 102 in the upper pressurizing component 100 to cooperate with the lower spring shaft 102 to transmit pressure to the lower pilot component. This is a preferred method for connecting multiple pressurizing components 100.

[0048] Furthermore, when A>B, the upper end face S1 of the spring shaft 102 is equal to the upper connecting face R1 of the housing 101, and the lower end face S2 of the spring shaft 102 is lower than the lower connecting face R2 of the housing 101. This is also a preferred method for connecting multiple pressurizing components 100, but it is different from... Figure 5 The situation in (b2) is similar, so it will not be described in detail.

[0049] Furthermore, when A>B, the upper end face S1 of the spring shaft 102 is higher than the upper connecting surface R1 of the housing 101, and the lower end face S2 of the spring shaft 102 is equal to the lower connecting surface R2 of the housing 101. This is also a preferred method for connecting multiple pressurizing components 100, but it is different from... Figure 5 The situation in (b1) is similar, so it will not be described in detail.

[0050] In the above-mentioned multiple (or five) preferred cases where A>B, multiple sets of pressurizing components 100 are connected. When the two connected spring shafts 102 are connected to the two housings 101, after the lower end face S2 of the upper spring shaft 102 and the upper end face S1 of the lower spring shaft 102 make rigid contact, the upper spring shaft 102 will be pushed upward by the lower spring shaft 102 for a certain distance, but this does not affect the normal use of the pressurizing component 100, so the purpose of pressure transmission can be achieved.

[0051] Both the upper connecting surface R1 and the lower connecting surface R2 are provided with connecting holes, and the positions of the connecting holes on the upper connecting surface R1 and the lower connecting surface R2 are corresponding, so they can be fixedly connected by bolts.

[0052] Furthermore, the pressurization assembly 100 also includes a connecting seat 104, which is fixedly connected to the inner wall of the housing 101 and slidably connected to the spring shaft 102.

[0053] Furthermore, the pressurizing assembly 100 also includes a sliding seat 105 and a pressure spring 106; the sliding seat 105 is fixedly connected to the spring shaft 102; the pressure spring 106 is sleeved on the spring shaft 102 and provides axial preload to the spring shaft 102; wherein, one end of the pressure spring 106 acts on the connecting seat 104 and the other end acts on the sliding seat 105.

[0054] The compression spring 106 provides axial preload to the spring shaft 102. The sliding seat 105 is fixedly connected to the inner wall of the housing 101 and located above the inner wall of the housing 101, and is slidably connected to the spring shaft 102. The housing 101 is configured to be vertically continuous, and the through hole at the bottom of the housing 101 is adapted to the outer surface of the spring shaft 102. With the addition of the sliding seat 105, the movement direction of the spring shaft 102 is restricted, so that it can only slide axially along the sliding seat 105.

[0055] It should be noted that in all preferred cases where A≥B, the upper end face S1 of the spring shaft 102 must not be lower than the height of the sliding seat 105, and the lower end face S2 of the spring shaft 102 must not be higher than the through hole below the housing 101, so as to avoid the spring shaft 102 moving in an unrestricted direction.

[0056] Reference Figures 6-9 This embodiment provides a pilot-operated breathing valve, including several pressurizing components 100, and a valve body 200 connected to and communicating with the interior of the housing 101; a pressure fine-tuning component 300 is disposed inside the housing 101.

[0057] The valve body 200 has a pilot shaft 201 inside. The top end of the pilot shaft 201 is in rigid contact with the lower end face S2 of the spring shaft 102 inside the connected housing 101, so that a gap H is formed between the sliding seat 105 and the bottom of the inner cavity of the housing 101, and H>0.

[0058] The pilot shaft 201 controls the opening of the valve body 200 by axially moving inside the valve body 200.

[0059] The top of the pilot shaft 201 needs to maintain rigid contact with the lower end face S2 of the spring shaft 102 inside the connected housing 101 in order to transmit the pressure of the pressurizing assembly 100 to the pilot shaft 201. When the top of the pilot shaft 201 maintains rigid contact with the lower end face S2 of the spring shaft 102 inside the connected housing 101, the spring shaft 102 will form a gap H > 0 inside the housing 101.

[0060] Specifically, if the top of the pilot shaft 201 is in rigid contact with the lower end face S2 of the spring shaft 102 inside the connected housing 101 and no gap H > 0 is formed, the sliding seat 105 will come into contact with the bottom of the inner cavity of the housing 101. This will cause the pressure of the pressurizing assembly 100 to transfer a portion of the pressure to the housing 101, thus preventing the pressure of the pressurizing assembly 100 from being fully transferred to the connected spring shaft 102 (or pilot shaft 201).

[0061] Furthermore, the pressure fine-tuning assembly 300 includes a bearing 301 disposed on the sliding seat 105 and connected to the end of the pressure spring 106, the sliding seat 105 being threadedly connected to the inner wall of the housing 101.

[0062] The compression variable of the pressure spring 106 is adjusted by rotating the threaded sliding seat 105, which allows the device to adjust the compression variable of the spring by rotation when it is within the compression range of the pressure spring 106, thus increasing the flexibility of the device's pressure adjustment.

[0063] The bearing 301 prevents the pressure spring 106 from rotating when the sliding seat 105 rotates, thus preventing the pressure spring 106 from twisting.

[0064] When multiple or a single pressurizing component 100 is connected to the valve body 200, a cover is connected to the top of the uppermost housing 101 of the valve body 200.

[0065] In use, when a single pressurizing component 100 is connected to the valve body 200, assuming the pressure value of the single pressurizing component 100 is P1, the preset pressure can be achieved by rotating the sliding seat 105 to change the compression variable of the pressure spring 106. It should be noted that this pressurization method ensures that the increased pressure value does not exceed the compression limit of the single pressure spring 106.

[0066] Finally, it should be noted that the methods and devices described in detail above are merely embodiments, and those skilled in the art can modify these embodiments in different ways as long as they do not depart from the scope of this utility model.

Claims

1. A pressure regulating mechanism, characterized in that: include, A pressurizing assembly (100) includes a housing (101) and a spring shaft (102) slidably disposed inside the housing (101). The housing (101) has an upper connecting surface (R1) and a lower connecting surface (R2), and the spring shaft (102) has an upper end surface (S1) and a lower end surface (S2). The length between the upper end surface (S1) and the lower end surface (S2) is A, and the length between the upper connecting surface (R1) and the lower connecting surface (R2) is B, and A≥B.

2. The pressure regulating mechanism as described in claim 1, characterized in that: The upper end face (S1) is higher than the upper connecting face (R1), the lower end face (S2) is higher than the lower connecting face (R2), and A≥B.

3. The pressure regulating mechanism as described in claim 1 or 2, characterized in that: The upper end face (S1) is lower than the upper connecting face (R1), the lower end face (S2) is lower than the lower connecting face (R2), and A≥B.

4. The pressure regulating mechanism as described in claim 3, characterized in that: The upper end face (S1) is higher than the upper connecting face (R1), the lower end face (S2) is lower than the lower connecting face (R2), and A>B.

5. The pressure regulating mechanism as described in any one of claims 1, 2, or 4, characterized in that: The upper end face (S1) is flush with the upper connecting face (R1), and the lower end face (S2) is flush with the lower connecting face (R2), and A = B.

6. The pressure regulating mechanism as described in any one of claims 1, 2, or 4, characterized in that: The housing (101) is provided with a protruding ring (103) lower than the lower connecting surface (R2). The outer diameter of the protruding ring (103) is equal to the inner diameter of the housing (101), and the outer diameter of the upper connecting surface (R1) is equal to the outer diameter of the lower connecting surface (R2).

7. The pressure regulating mechanism as described in claim 6, characterized in that: The pressurization assembly (100) also includes a connecting seat (104), which is fixedly connected to the inner wall of the housing (101) and slidably connected to the spring shaft (102).

8. The pressure regulating mechanism as described in claim 7, characterized in that: The pressurization assembly (100) also includes a sliding seat (105) and a pressure spring (106). The sliding seat (105) is fixedly connected to the spring shaft (102); The pressure spring (106) is sleeved on the spring shaft (102) and provides axial preload to the spring shaft (102); One end of the pressure spring (106) acts on the connecting seat (104), and the other end acts on the sliding seat (105).

9. A pilot-operated breather valve, comprising the pressure regulating mechanism as described in claim 8, characterized in that: The pressurization assembly (100) is provided in several parts, and the pilot-operated breathing valve also includes, A valve body (200) is connected to the housing (101) and communicates with the interior of the housing (101); A pressure fine-tuning assembly (300) is disposed inside the housing (101); The valve body (200) is provided with a pilot shaft (201) inside. The top end of the pilot shaft (201) is in rigid contact with the lower end face (S2) of the spring shaft (102) connected to the housing (101), so that a gap H is formed between the sliding seat (105) and the bottom of the inner cavity of the housing (101), and H>0.

10. The pilot-operated breather valve as described in claim 9, characterized in that: The pressure fine-tuning assembly (300) includes a bearing (301) disposed on the sliding seat (105) and connected to the end of the pressure spring (106), the sliding seat (105) being threadedly connected to the inner wall of the housing (101).

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