Cut-off pressure stabilizing valve

Abstract

The utility model relates to a cut-off pressure stabilizing valve which comprises a main body, and the main body comprises a front end connector and a valve body which are integrally formed. An air inlet part and an air outlet part are arranged in the valve body, and the air inlet part extends to the outside from the front end connector; an emergency gas cut-off part and a reset part are arranged on the gas inlet part up and down, and a first-stage valve seat and a second-stage valve seat are sequentially communicated between the gas inlet part and the gas outlet part. According to the cut-off pressure stabilizing valve, the front end connector and the valve body are integrally formed, weak positions of threaded connection do not exist, the strength is remarkably improved, and larger external force and pressure can be borne. And moreover, sealing points are reduced through integral forming, and other sealing measures are matched, so that the sealing performance is greatly improved, and the gas leakage risk is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to gas valve technical field especially relates to a cut-off pressure -stabilizing valve. BACKGROUND

[0002] The gas cut-off valve as the important safety matching device in the gas pipeline engineering plays the key role in the aspect of guaranteeing the gas use safety. It is usually connected with the combustible gas leakage monitoring instrument, and once the monitoring instrument detects the combustible gas leakage, the main gas supply valve is automatically and quickly closed, thereby timely cutting off the gas supply and effectively avoiding the occurrence of vicious accidents.

[0003] However, the existing gas cut-off valve on the market usually makes the front end connector and the rear end valve body into two independent individuals, and then uses the threaded connection. However, it is found in actual use that the strength of the existing gas cut-off valve is not enough or the sealing is not good, and there is room for improvement. SUMMARY

[0004] In order to overcome at least one of the defects of the prior art described above, according to one aspect of the utility model, a cut-off pressure-stabilizing valve is provided, which comprises a main body, the main body comprising an integrally formed front end connector and a valve body; the valve body has an air inlet portion and an air outlet portion, and the air inlet portion extends to the outside from the front end connector; an emergency gas cut-off portion and a reset portion are arranged above and below the air inlet portion, and a primary valve seat and a secondary valve seat are sequentially connected between the air inlet portion and the air outlet portion.

[0005] In an embodiment of the present application, the primary valve seat and the secondary valve seat are arranged on the opposite sides.

[0006] In an embodiment of the present application, the primary valve seat comprises a primary valve cavity communicating with the air inlet portion and a primary pressure stabilizing assembly located in the primary valve cavity, and the primary pressure stabilizing assembly is used to stabilize and control the gas entering the primary valve cavity from the air inlet portion.

[0007] In an embodiment of the present application, the secondary valve seat comprises a secondary valve cavity communicating with the air outlet portion and a secondary pressure stabilizing assembly located in the secondary valve cavity, and the secondary valve cavity and the primary valve cavity are communicated through a connecting channel, and the secondary pressure stabilizing assembly is used to stabilize and control the gas entering the secondary valve cavity from the connecting channel.

[0008] In an embodiment of the present application, the secondary pressure stabilizing assembly comprises a secondary diaphragm structure, a secondary contact shaft and a valve rod connected with the secondary contact shaft are arranged on one side of the secondary diaphragm structure, and a secondary spring is arranged on the other side of the secondary diaphragm structure.

[0009] The valve rod is hinged in the secondary valve cavity to form a lever structure, and a sealing member is arranged at the end of the valve rod, and the sealing member is used to abut against the outlet of the connecting channel.

[0010] In an embodiment of the present application, the connecting channel is obliquely arranged.

[0011] In an embodiment of the present application, the reset part comprises a reset top rod and a pressure gauge connected with the reset top rod, and the pressure gauge is arranged outside the valve body; a detection channel is arranged through the reset top rod, one end of the detection channel is located at a detection end of the pressure gauge, and the other end is communicated with the air inlet part.

[0012] In an embodiment of the present application, the primary pressure stabilizing assembly comprises a primary diaphragm structure, the primary diaphragm structure is used to separate the primary valve cavity into a primary gas cavity and a primary non-gas cavity, a primary valve core is arranged in the primary gas cavity, and a pressure gauge or a pressure detection assembly is arranged in the primary non-gas cavity.

[0013] In an embodiment of the present application, the pressure detection assembly comprises a transparent cover arranged at a cavity opening of the primary non-gas cavity, a marker column is fixed to the inner side of the transparent cover, and a moving sleeve rod is sleeved on the circumferential outer side of the detection column.

[0014] One end of the moving sleeve rod has a containing cavity capable of completely covering the marker column, the other end of the moving sleeve rod is connected to the primary diaphragm structure, and a reset spring is arranged between the inner wall of the containing cavity and the marker column.

[0015] In an embodiment of the present application, the marker column has a first region, a second region and a third region in sequence in the direction away from the transparent cover.

[0016] The first region, the second region and the third region are distinguished by different colors.

[0017] In summary, the cut-off pressure stabilizing valve provided by the present application has the following technical effects:

[0018] The valve front connector and the valve body of the cut-off pressure stabilizing valve are integrally formed, there is no weak point of thread connection, the strength is significantly improved, and greater external force and pressure can be borne. Moreover, the integrally formed reduces the sealing points, cooperates with other sealing measures, greatly improves the sealing performance, and reduces the risk of gas leakage. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 FIG. 1 is a structural schematic view of the cut-off pressure stabilizing valve of the present application;

[0020] Figure 2 FIG. 2 is a sectional view of the cut-off pressure stabilizing valve of the present application;

[0021] Figure 3 FIG. 3 is another sectional view of the cut-off pressure stabilizing valve of the present application;

[0022] Figure 4Another sectional view of the cut-off pressure stabilizing valve of another embodiment of the utility model;

[0023] Figure 5 A sectional view of the cut-off pressure stabil valve of another embodiment of the utility model;

[0024] Figure 6 For Figure 5 The local enlarged view at A in the middle;

[0025] Figure 7 The exploded state schematic view of the index post, the moving sleeve rod and the return spring in the cut-off pressure stabilizing valve of another embodiment of the utility model;

[0026] The drawings: 11-front end joint, 12-valve body, 13-inlet part, 14-outlet part, 15-emergency gas cutting part, 16-resetting part, 161-resetting top rod, 162-detection channel, 17-primary valve seat, 171-primary valve cavity, 18-secondary valve seat, 181-secondary valve cavity, 19-connection channel, 21-primary diaphragm structure, 22-primary valve core, 31-secondary diaphragm structure, 32-secondary contact shaft, 33-valve rod, 34-secondary spring, 35-sealing element, 4-pressure gauge, 5-detection pressure assembly, 51-transparent cover, 52-index post, 521-first region, 522-second region, 523-third region, 53-moving sleeve rod, 531-receiving cavity, 54-return spring. DETAILED DESCRIPTION

[0027] In order to better understand and implement, the technical scheme in the embodiments of the utility model will be clearly and completely described below in combination with the drawings in the embodiments of the utility model.

[0028] In the description of the utility model, it needs to be explained that the terms "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the utility model and simplifying the description, and are not intended to indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as a limitation on the utility model.

[0029] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which the utility model belongs. The terms used in the specification of the utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the utility model.

[0030] Embodiments of the utility model disclose a cut-off pressure stabilizing valve, which will be described below in combination with the drawings Figure 1 -attached Figure 7 for description.

[0031] Specifically, the cut-off pressure stabilizing valve includes a main body, the main body includes an integrally formed front end connector 11 and a valve body 12; the valve body 12 has an air inlet part 13 and an air outlet part 14 inside, and the air inlet part 13 extends to the outside from the front end connector 11; an emergency gas cutting part 15 and a reset part 16 are arranged up and down at the air inlet part 13, and a primary valve seat 17 and a secondary valve seat 18 are sequentially connected between the air inlet part 13 and the air outlet part 14.

[0032] Since the front end connector 11 and the rear end valve body 12 of the ordinary gas cut-off valve on the market are threadedly connected, the overall strength is weak, and it is easy to be damaged when subjected to external force or pressure fluctuation. The front end connector 11 and the valve body 12 of the cut-off pressure stabilizing valve of the present application are integrally formed, there is no weak point of threaded connection, the strength is significantly improved, and it can withstand greater external force and pressure. Moreover, the threaded connection of the ordinary cut-off valve is easy to seal, which causes gas leakage, while the integrally formed cut-off pressure stabilizing valve reduces the sealing points, cooperates with other sealing measures, greatly improves the sealing performance, and reduces the risk of gas leakage.

[0033] Therefore, the strength and sealing problems are solved, the gas leakage possibility is reduced, the explosion, fire and other malignant accidents are reduced, and a safer gas environment is provided for users and the surrounding environment. Moreover, the strength is high, the sealing is good, the valve is more wear-resistant and corrosion-resistant, the damage is reduced, the service life is prolonged, the replacement cost is saved, and the stable strength and sealing ensure that the valve works normally under various working conditions, cuts off the gas in time and accurately, and ensures the stability and reliability of the gas supply system.

[0034] Specifically, the emergency gas cutting part 15 can be an electromagnetic valve. The electromagnetic valve can accurately control the cut-off and conduction of the gas, cooperate with various sensors and control systems, accurately judge whether the gas needs to be cut off according to the preset parameters and the actually detected gas concentration, pressure and other data, and accurately control the opening degree when the gas supply needs to be restored, so as to realize fine management of the gas supply.

[0035] Further, the primary valve seat 17 and the secondary valve seat 18 are arranged on the opposite sides. In the limited space of the gas cut-off valve, the primary valve seat 17 and the secondary valve seat 18 arranged on the opposite sides can more reasonably utilize the space, avoid the structure congestion and layout disorder caused by the same side arrangement, make the internal structure of the valve more compact and regular, and facilitate installation and maintenance.

[0036] Further, the primary valve seat 17 comprises a primary valve cavity 171 communicated with the gas inlet part 13 and a primary pressure stabilizing assembly arranged in the primary valve cavity 171, which is used to stabilize the gas pressure from the gas inlet part 13 into the primary valve cavity 171. Due to the change of gas source pressure, user consumption fluctuation and other factors, the gas pressure may be unstable during the delivery process. The primary pressure stabilizing assembly can stabilize the gas pressure from the gas inlet part 13 into the primary valve cavity 171, effectively solve the problem of high and low pressure, and ensure the gas pressure in a stable state. Therefore, stable gas pressure can make various gas equipment, such as wall-hanging stove, gas water heater, gas stove, etc., work in a normal pressure environment, avoid damage to the valve, pipeline, burner and other parts inside the equipment due to abnormal pressure, and prolong the service life of the gas equipment.

[0037] Further, the secondary valve seat 18 comprises a secondary valve cavity 181 communicated with the gas outlet part 14 and a secondary pressure stabilizing assembly arranged in the secondary valve cavity 181, and the secondary valve cavity 181 and the primary valve cavity 171 are communicated through the connecting channel 19, and the secondary pressure stabilizing assembly is used to stabilize the gas pressure from the connecting channel 19 into the secondary valve cavity 181. In actual use, although the primary pressure stabilizing assembly has preliminarily stabilized the gas pressure, the gas pressure may still fluctuate during the pipeline transmission and the process from the primary valve cavity 171 to the secondary valve cavity 181. The secondary pressure stabilizing assembly can again stabilize the gas pressure from the connecting channel 19 into the secondary valve cavity 181, solve the problem of unstable pressure after the primary pressure stabilizing, and make the gas pressure more accurate and stable.

[0038] Further, the secondary pressure stabilizing assembly comprises a secondary diaphragm structure 31, a secondary contact shaft 32 and a valve rod 33 connected with the secondary contact shaft 32 are arranged on one side of the secondary diaphragm structure 31, and a secondary spring 34 is arranged on the other side of the secondary diaphragm structure 31; the valve rod 33 is hinged in the secondary valve cavity 181 to form a lever structure, and a sealing element 35 is arranged at the end of the valve rod 33, which is used to abut the outlet of the connecting channel 19. This can automatically adjust the contact state of the sealing element 35 and the outlet of the connecting channel 19 according to the change of gas pressure, so as to realize accurate control of gas flow, solve the problem of self-adaptive pressure adjustment, and ensure stable output pressure. Moreover, based on the synergistic effect of the lever structure and the secondary diaphragm, the gas pressure can be quickly and effectively adjusted, so that the gas pressure output by the secondary valve cavity 181 is more stable, a stable gas source is provided for the gas equipment, and the equipment is ensured to operate efficiently and stably.

[0039] More importantly, the secondary pressure stabilizing component in the existing gas valve has eight parts, while the present application only has five parts, namely, the secondary diaphragm structure 31, the secondary contact shaft 32, the valve rod 33, the secondary spring 34 and the sealing member 35. First, reducing the number of parts can reduce the material cost and processing cost in the manufacturing process. The number of material purchases is reduced, and the processing procedure is also simplified accordingly, which directly reduces the production cost. Second, fewer parts mean lower assembly difficulty and error rate. In the assembly process, fewer parts can enable workers to complete the assembly more quickly and accurately, improving production efficiency. Moreover, as the number of connection points and matching surfaces between parts is reduced, the risk of failure caused by improper assembly is also reduced.

[0040] Further, the connection channel 19 is inclined. There may be a pressure difference between the primary valve cavity 171 and the secondary valve cavity 181. If the connection channel 19 is not reasonably arranged, the pressure difference may be too large or too small, affecting the pressure stabilizing effect. The inclined connection channel 19 can adjust the flow rate and flow direction of the gas to a certain extent, which helps to balance the pressure difference between the two valve cavities, making the transition of the gas between the two valve cavities more stable, and providing more stable input conditions for the secondary pressure stabilizing component.

[0041] Further, the reset part 16 includes a reset top rod 161 and a pressure gauge 4 connected to the reset top rod 161, and the pressure gauge 4 is arranged on the outside of the valve body 12. A detection channel 162 is arranged through the reset top rod 161, one end of the detection channel 162 is located at the detection end of the pressure gauge 4, and the other end is communicated with the gas inlet part 13. In the gas system, it is crucial to accurately understand the pressure condition of the gas inlet part 13. By arranging the through detection channel 162 in the reset top rod 161, the pressure of the gas inlet part 13 is conducted to the detection end of the pressure gauge 4 outside the valve body 12, which enables the operator to obtain the gas inlet pressure data intuitively and in real time, solving the problem of being unable to directly observe the gas inlet pressure.

[0042] Specifically, the pressure gauge 4 can be connected to the circuit board of the cut-off pressure stabilizing valve of the present application, which can feedback the connected cylinder pressure in real time, so that the user and the gas management system can know the gas storage condition in the cylinder at any time. Moreover, when the cut-off occurs, the pressure gauge 4 displays a reading of 0, which can directly prove that the cut-off action has been realized. This provides a clear indication for the user and the maintenance personnel, without the need to judge whether the gas has been cut off through other complex ways, reducing the risk of judgment error and improving safety.

[0043] More importantly, the pressure gauge 4, together with the reset top rod 161, can be pressed to reset after checking the safety of the gas circuit after the cut-off occurs. This design makes the reset operation very simple and direct. Users or maintenance personnel do not need to use additional tools or perform complex operation procedures. They only need to directly press the pressure gauge 4 after confirming the safety of the gas circuit to complete the reset, saving time and labor costs and improving operation efficiency.

[0044] For reference Figures 5-7 In another embodiment, further, the primary pressure stabilizing assembly includes a primary diaphragm structure 21 for separating the primary valve cavity 171 into a primary gas cavity and a primary non-gas cavity. A primary valve core 22 is arranged in the primary gas cavity, and a pressure gauge 4 or a pressure detection assembly 5 is arranged in the primary non-gas cavity. The primary diaphragm structure 21 separates the primary valve cavity 171 into the primary gas cavity and the primary non-gas cavity. When the gas pressure in the primary gas cavity changes, the primary diaphragm structure 21 will deform accordingly. This deformation can push the primary valve core 22 to adjust, so that the gas flow is controlled, thereby solving the problem of uneven gas pressure and achieving precise pressure stabilization of the gas pressure.

[0045] In addition, the pressure gauge 4 or the pressure detection assembly 5 arranged in the primary non-gas cavity can monitor the pressure in the primary valve cavity 171 in real time. Compared with external pressure detection only, this design can more accurately obtain the actual pressure in the primary valve cavity 171, solving the problem that external detection cannot accurately reflect the internal pressure.

[0046] Further, the pressure detection assembly 5 includes a transparent cover 51 arranged on the cavity opening of the primary non-gas cavity, a scale post 52 fixed on the inner side of the transparent cover 51, and a moving sleeve rod 53 sleeved on the circumferential outer side of the scale post 52. One end of the moving sleeve rod 53 has a receiving cavity 531 capable of completely covering the scale post 52, the other end of the moving sleeve rod 53 is connected to the primary diaphragm structure 21, and a reset spring 54 is arranged between the inner wall of the receiving cavity 531 and the scale post 52.

[0047] The pressure detection assembly 5 composed of the transparent cover 51, the scale post 52, the moving sleeve rod 53, and the reset spring 54 can display the pressure change of the primary non-gas cavity in a more intuitive way. Users can directly judge whether the pressure is normal by observing the relative position of the moving sleeve rod 53 and the scale post 52, without reading specific values, solving the problem of insufficient intuitive pressure display in some scenarios.

[0048] Further, the marker post 52 has a first area 521, a second area 522 and a third area 523 in sequence in a direction away from the transparent cover 51; the first area 521, the second area 522 and the third area 523 are distinguished by different colors. For example, the first area 521, the second area 522 and the third area 523 can be green, yellow and red respectively. By dividing the marker post 52 into the first area 521, the second area 522 and the third area 523 of different colors, different pressure ranges can be clearly defined. For example, the green first area 521 can represent high pressure of the connected steel cylinder, the yellow second area 522 can represent medium pressure of the connected steel cylinder, and the red third area 523 can represent low pressure of the connected steel cylinder, so that the operator can judge the pressure state of the connected steel cylinder at a glance.

[0049] In order to better understand the meaning of the first area 521, the second area 522 and the third area 523 of the marker post 52, an example is given:

[0050] When the pressure is low or there is no pressure, the primary diaphragm structure 21 remains in the original state, and there is no pushing force on the moving sleeve rod 53. The rod end surface (set as a pressure line) of the moving sleeve rod 53 is in the red third area 523, indicating that the current pressure is low or there is no pressure.

[0051] When the pressure is medium or high, the primary diaphragm structure 21 is deformed by the gas pressure and expands outward, which will have a pushing force on the moving sleeve rod 53, i.e. moving in the direction close to the transparent cover 51. The pressure line of the rod end surface of the moving sleeve rod 53 is in the yellow second area 522 or the green third area 523, indicating that the current pressure is high (green) or medium (yellow).

[0052] The technical means disclosed in the utility model scheme is not limited to the technical means disclosed in the above-mentioned embodiments, but also includes technical solutions composed of any combination of the above technical features. It should be noted that for ordinary skilled persons in the art, without departing from the principles of the utility model, some improvements and refinements can be made, which are also considered within the protection scope of the utility model.

Claims

1. A shutoff pressure regulating valve characterized by comprising: The utility model provides a kind of gas valve, including main body, main body includes integrally formed front end connector (11) and valve body (12);Valve body (12) has intake portion (13) and gas outlet portion (14) in it, and intake portion (13) extends to outside from front end connector (11);Emergency gas cutting portion (15) and reset portion (16) are arranged in intake portion (13) up and down, and first valve seat (17) and second valve seat (18) are sequentially communicated between intake portion (13) and gas outlet portion (14).

2. A shut-to-open pressure relief valve according to claim 1, wherein The first valve seat (17) and the second valve seat (18) are arranged on different sides.

3. A shut-off pressure regulating valve according to claim 1 or 2, characterised in that The first valve seat (17) includes a first valve cavity (171) in communication with the intake portion (13) and a first pressure stabilizing component located in the first valve cavity (171), which is used to stabilize and regulate the gas entering the first valve cavity (171) from the intake portion (13).

4. A shut-to-open pressure relief valve according to claim 3, wherein The second valve seat (18) includes a second valve cavity (181) in communication with the gas outlet portion (14) and a second pressure stabilizing component located in the second valve cavity (181), and the second valve cavity (181) and the first valve cavity (171) are communicated through a connecting channel (19), and the second pressure stabilizing component is used to stabilize and regulate the gas entering the second valve cavity (181) from the connecting channel (19).

5. A shut-to-open pressure relief valve according to claim 4, wherein The second pressure stabilizing component includes a secondary diaphragm structure (31), a secondary contact shaft (32) is arranged on one side of the secondary diaphragm structure (31), and a valve rod (33) connected with the secondary contact shaft (32) is arranged on the other side of the secondary diaphragm structure (31), and a secondary spring (34) is arranged on the other side of the secondary diaphragm structure (31). The valve rod (33) is hinged in the second valve cavity (181) to form a lever structure, and a sealing element (35) is arranged at the end of the valve rod (33), which is used to abut the outlet of the connecting channel (19).

6. A shut-off pressure regulating valve according to claim 4 or 5, characterised in that The connecting channel (19) is inclined.

7. A shut-off pressure regulating valve according to any one of claims 1, 2, 4, 5, characterized in that The reset portion (16) includes a reset top rod (161) and a pressure gauge (4) connected with the reset top rod (161), and the pressure gauge (4) is arranged on the outside of the valve body (12); a detection channel (162) is arranged through the reset top rod (161), one end of the detection channel (162) is located at the detection end of the pressure gauge (4), and the other end is communicated with the intake portion (13).

8. The shutoff pressure regulating valve of claim 3, wherein The first pressure stabilizing component includes a first diaphragm structure (21), which is used to divide the first valve cavity (171) into a first gas cavity and a first non-gas cavity, a first valve core (22) is arranged in the first gas cavity, and a pressure gauge (4) or a detection pressure component (5) is arranged in the first non-gas cavity.

9. A shut-to-open pressure relief valve according to claim 8, wherein The detection pressure component (5) includes a transparent cover (51) arranged on the cavity opening of the first non-gas cavity, a scale column (52) is fixed on the inner side of the transparent cover (51), and a movable sleeve rod (53) is sleeved on the circumferential outer side of the detection column; One end of the mobile sleeve rod (53) has a containing cavity (531) capable of completely covering the marker post (52), the other end of the mobile sleeve rod (53) is connected to the primary diaphragm structure (21), and a reset spring (54) is arranged between the inner wall of the containing cavity (531) and the marker post (52).

10. A shut-to-open valve according to claim 9, wherein The marker post (52) has a first region (521), a second region (522) and a third region (523) in sequence in the direction away from the transparent cover (51). The first region (521), the second region (522) and the third region (523) are distinguished by different colors.

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