Pressure regulator with overpressure cut-off function and automatic reset function

Abstract

The utility model discloses a pressure regulator with an overpressure cut-off function and an automatic reset function, which relates to the field of gas valves and comprises a valve body, a gas inlet regulating component and an overpressure cut-off valve are mounted in the valve body, and the overpressure cut-off valve is further connected with the valve body through a pressure regulating component. The air inlet adjusting assembly and the overpressure stop valve in the pressure regulator are both of a forward sealing structure, so that the sealing reliability is guaranteed; meanwhile, the overpressure cut-off valve does not need to be reset manually after being cut off, the overpressure cut-off valve can be reset automatically after the gas pressure is recovered to the safety threshold value, and user operation is reduced.

Description

Technical Field

[0001] The utility model relates to the field of gas valves, in particular to a pressure regulator with overpressure cut-off function and automatic reset function. Background Art

[0002] The pressure regulator is a special valve installed in the gas pipeline. Its function is to keep the downstream pressure stable by automatically changing the opening of the pressure regulator valve port regardless of the changes in the upstream pressure and flow of the gas. When the flow through the pressure regulator is zero, that is, the pressure regulator is in a completely closed state, the pressure in the pressure regulator cavity is a constant value, and this value is less than the inlet pressure value of the pressure regulator. However, in actual use, due to foreign matter, damage and creep of the valve port sealing rubber parts of the pressure regulator, even if the pressure regulator is in a completely closed state, there will be a slight flow through the valve port into the valve cavity, which will eventually make the static pressure of the pressure regulator invalid. At this time, it has a serious impact on the safety products and gas-using equipment at the back end of the pressure regulator, such as the high pressure may cause the stove to self-lock at high pressure, the self-closing valve to cut off at high pressure, and the hose to fall off the pipe.

[0003] In the prior art, the pressure regulator adopts a dual valve port design, namely, a pressure regulating valve port and an overpressure valve port. When the inlet is ventilated normally and the flow rate is zero, the pressure regulating valve port is closed to block the passage of gas. When the pressure regulating valve port fails, the pressure regulating valve port is opened and the overpressure valve port is closed, thereby preventing high-pressure gas from entering the valve cavity. The above scheme has the following disadvantages: when the pressure regulator fails to regulate pressure, it is necessary to evacuate the gas in the valve cavity and then manually open the valve, which is complicated to operate and is prone to failure to open.

[0004] In view of the above problems, the utility model provides a voltage regulator with overpressure cut-off and automatic reset to solve the above problems. Utility Model Content

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a pressure regulator with overpressure cut-off and automatic reset, comprising: a valve body, an air intake adjustment component, and an overpressure cut-off valve;

[0006] The overpressure cut-off valve is slidably disposed in the valve body; it reciprocates and slides in the valve body according to the pressure in the cavity of the valve body;

[0007] The air intake regulating component is slidably arranged in the air intake valve passage of the valve body, and the overpressure cut-off valve reciprocates to regulate the air intake regulating component to slide left and right in the air intake valve passage; when the overpressure cut-off valve moves to the uppermost limit position, the air intake regulating component cuts off the air intake valve passage;

[0008] When the pressure in the cavity is normal, the overpressure cut-off valve moves downward to adjust the air intake regulating component, so that the air intake regulating component opens the air intake valve path.

[0009] Further, preferably, it also includes: a voltage regulating component;

[0010] The pressure regulating assembly comprises: a connecting rod, a diaphragm, a pressure plate, and a pressure regulating spring;

[0011] The diaphragm is fixed on the valve body and fixedly connected to one end of the pressure regulating spring, and the other end of the pressure regulating spring is fixed on the valve body;

[0012] The connecting rod is slidably arranged on the valve body, and one end of the connecting rod penetrates the diaphragm and is fixedly connected through the pressure plate;

[0013] When the pressure is normal, the connecting rod slides up and down in the valve body under the change of the cavity pressure, so that the overpressure cut-off valve moves up and down in the valve body;

[0014] When the pressure is too high and the air intake regulating assembly fails, the diaphragm drives the connecting rod to slide to the uppermost limit position, so that the overpressure cut-off valve can achieve contact sealing with the cavity, thereby making the gas pressure of the outlet valve channel zero;

[0015] When the pressure returns to normal, the pressure regulating spring drives the connecting rod to enable the overpressure cut-off valve to release the seal on the cavity.

[0016] Further, preferably, a screw is fixed at one end of the connecting rod, and an inclined platform is fixed at the other end, and an overpressure cut-off valve is also provided on the connecting rod;

[0017] The screw rod is connected to the pressure plate through a compression nut, so that the connecting rod is fixedly connected to the diaphragm;

[0018] The inclined platform abuts against the air intake adjustment component.

[0019] Further, preferably, the overpressure cut-off valve comprises: a cut-off valve pad, a valve seat, and a sealing ring;

[0020] The cut-off valve pad is fixed on the inclined platform;

[0021] The valve seat is installed on the valve body through the sealing ring;

[0022] When the connecting rod slides to the uppermost limit position, the cut-off valve pad forms a contact seal with the valve seat to seal the cavity.

[0023] Further, preferably, the air intake adjustment assembly comprises: a push rod, a cut-off spring;

[0024] The push rod is slidably disposed in the intake valve passage of the valve body, and one end thereof abuts against the inclined platform;

[0025] One end of the cut-off spring is fixed in the intake valve channel through a valve channel nut, and the other end is fixed on the push rod.

[0026] Further, preferably, the push rod is also fixed with a pressure regulating valve seat, and a steel ball is rollingly arranged;

[0027] The steel ball abuts against the ramp under the elastic force of the cut-off spring;

[0028] When in overpressure, the push rod will move to the rightmost limit position, so that the pressure regulating valve seat and the intake valve channel form a contact seal;

[0029] When the pressure returns to normal, the cut-off spring will drive the push rod to slide to the left, releasing the sealing of the pressure regulating valve seat on the intake valve channel.

[0030] Further, preferably, the air intake regulating assembly and the overpressure cut-off valve both adopt a forward sealing structure.

[0031] Further, preferably, the overpressure cut-off valve, the air intake regulating assembly and the valve body form the cavity.

[0032] Compared with the prior art, the utility model provides a voltage regulator with overpressure cut-off and automatic reset, which has the following beneficial effects:

[0033] 1. When the air intake regulating assembly loses its sealing effect on the air intake valve channel, under the condition of gas overpressure, the overpressure cut-off valve can seal the valve cavity, thereby preventing the overpressure gas from flowing out of the outlet valve channel;

[0034] 2. The overpressure cut-off valve does not need to be manually reset after being cut off. After the gas pressure returns to the safety threshold, the overpressure cut-off valve can be automatically reset, reducing user operations. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 This is a schematic diagram of the normal use of a voltage regulator with overpressure cut-off and automatic reset;

[0036] Figure 2 This is a schematic diagram of the structure of a pressure regulator with overpressure cut-off and automatic reset in the closed state of the valve port;

[0037] Figure 3 This is a schematic diagram of a pressure regulator valve cutoff with overpressure cutoff and automatic reset;

[0038] Figure 4 This is a structural diagram of an air inlet adjustment component of a pressure regulator with overpressure cutoff and automatic reset;

[0039] Figure 5 This is a structural diagram of a pressure regulator overpressure cut-off valve with overpressure cut-off and automatic reset.

[0040] In the figure: 1. lower shell; 2. upper shell; 3. pressure regulating assembly; 4. cut-off spring; 5. air intake regulating assembly; 5-1. pressure regulating valve seat; 5-2. push rod; 5-3. steel ball; 6. overpressure cut-off valve; 6-1. diaphragm; 6-2. pressure plate; 6-3. clamping nut; 6-4. connecting rod; 6-5. cut-off valve pad; 7. valve seat; 8. sealing ring. DETAILED DESCRIPTION

[0041] Reference Figure 1 to Figure 5 , the utility model provides a technical solution: a pressure regulator with overpressure cut-off and automatic reset, comprising: a valve body, an air intake adjustment component 5, an overpressure cut-off valve 6;

[0042] The overpressure cut-off valve 6 is slidably disposed in the valve body and reciprocates in the valve body according to the pressure in the valve cavity of the valve body;

[0043] The air intake regulating assembly 5 is slidably arranged in the air intake valve passage of the valve body, and the overpressure cut-off valve 6 reciprocatingly adjusts the air intake regulating assembly 5 to slide left and right in the air intake valve passage; when the overpressure cut-off valve 6 moves to the uppermost limit position, the air intake regulating assembly 5 cuts off the air intake valve passage;

[0044] When the cavity pressure is normal, the overpressure cut-off valve 6 moves downward to adjust the air intake regulating assembly 5 so that the air intake regulating assembly 5 opens the air intake valve channel.

[0045] It should be noted that the valve body in the gas pipeline is divided into an integrated valve body and a split valve body, both of which can use this solution; the valve body in this application is a split valve body, including: a lower shell 1 and an upper shell 2, and the upper shell 2 is fixed to the lower shell 1 by bolts.

[0046] The overpressure cut-off valve 6 is pushed by the gas pressure in the valve cavity to change the sliding stroke of the air intake regulating component 5 in the air intake valve channel (when the gas pressure in the valve cavity is large, the sliding stroke of the air intake regulating component 5 is larger; conversely, the sliding stroke of the air intake regulating component 5 is smaller); the change in the size of the gas pressure in the cavity causes the overpressure cut-off valve 6 to change the relative distance with the cavity, thereby changing the volume of the cavity, realizing the control of the gas flow pressure of the outlet valve channel, and keeping it within the safety threshold range; when the gas pressure in the cavity exceeds the safety threshold, the strong gas pressure will push the overpressure cut-off valve 6 to slide to the upper limit position of the valve body, thereby maximizing the sliding stroke of the air intake regulating component 5, even if the air intake regulating component 5 slides to the rightmost end to form a contact seal with the air intake valve channel, and the greater the gas pressure, the better the sealing effect of the air intake regulating component 5 and the air intake valve channel; when the gas pressure returns to the safety threshold range, the air intake regulating component 5 can automatically release the sealing effect on the air intake valve channel and restore the regulating effect on the gas pressure.

[0047] When the air intake regulating component 5 fails to seal the air intake valve channel and the gas pressure in the cavity exceeds the safety threshold, the gas flow pressure will directly drive the overpressure cut-off valve 6 to form a contact seal with the cavity, and the greater the gas pressure, the better the sealing effect on the cavity; when the gas pressure returns to the safety threshold range, the overpressure cut-off valve 6 can automatically release the sealing effect on the cavity without the need for manual secondary opening of the valve.

[0048] As a preferred embodiment, the invention further comprises: a voltage regulating component;

[0049] The pressure regulating assembly includes: a connecting rod 6-4, a diaphragm 6-1, a pressure plate 6-2, and a pressure regulating spring 3;

[0050] The diaphragm 6-1 is fixed on the valve body and fixedly connected to one end of the pressure regulating spring 3, and the other end of the pressure regulating spring 3 is fixed on the valve body;

[0051] The connecting rod 6-4 is slidably arranged on the valve body, and one end thereof penetrates through the diaphragm 6-1 and is fixedly connected through the pressure plate 6-2;

[0052] When the pressure is normal, the connecting rod 6-4 slides up and down in the valve body under the change of the cavity pressure, so that the overpressure cut-off valve 6 moves up and down in the valve body;

[0053] When the pressure is too high and the air intake regulating assembly 5 fails, the diaphragm 6-1 drives the connecting rod 6-4 to slide to the uppermost limit position, so that the overpressure cut-off valve 6 can achieve contact sealing with the cavity, thereby making the gas pressure of the outlet valve channel zero;

[0054] When the pressure returns to normal, the pressure regulating spring 3 drives the connecting rod 6 - 4 to enable the overpressure cut-off valve 6 to release the seal on the cavity.

[0055] It should be noted that when the sealing effect between the air intake regulating component 5 and the air intake valve channel is good, the diaphragm 6-1 drives the connecting rod 6-4 to slide up and down in the valve body under the change of the cavity pressure, so as to realize the regulation of the cavity volume, that is, to realize the regulation of the gas pressure of the outlet valve channel; when the gas pressure exceeds the safety threshold, the cavity gas pressure pushes the diaphragm 6-1, so that the connecting rod 6-4 slides to the uppermost limit position of the valve body, and completes the contact sealing of the cavity through the overpressure cut-off valve 6; at the same time, the air intake regulating component 5 will reach the maximum sliding stroke in the air intake valve channel, so that the air intake regulating component 5 slides to the right to the limit position, that is, the sealing of the air intake valve channel is realized, and a double sealing effect is achieved, thereby avoiding internal leakage of the cavity and ensuring the reliability of the sealing.

[0056] When the air intake regulating assembly 5 fails and the gas pressure exceeds the safety threshold, the cavity gas pressure will cause the diaphragm 6-1 to drive the connecting rod 6-4 to slide upward to the extreme position, thereby allowing the overpressure cut-off valve 6 to seal the cavity, and the greater the gas pressure, the better the sealing effect; when the gas pressure returns to normal, the connecting rod 6-4 is driven by the pressure regulating spring 3, thereby allowing the overpressure cut-off valve 6 to release the sealing effect on the cavity, even if the pressure regulator returns to normal working state, and there is no need to manually reopen the valve after overpressure.

[0057] As a preferred embodiment, a screw is provided at one end of the connecting rod 6-4, and a ramp is fixed at the other end, and an overpressure cut-off valve 6 is also provided on the connecting rod 6-4;

[0058] The screw rod is connected to the pressure plate 6-2 through the compression nut 6-3, so that the connecting rod 6-4 is fixedly connected to the diaphragm 6-1;

[0059] The inclined platform abuts against the air intake adjustment component 5 .

[0060] As a preferred embodiment, the overpressure cut-off valve 6 comprises: a cut-off valve pad 6-5, a valve seat 7, and a sealing ring 8;

[0061] The cut-off valve pad 6-5 is fixed on the inclined platform;

[0062] The valve seat 7 is installed on the valve body through the sealing ring 8;

[0063] When the cut-off valve pad 6-5 slides to the uppermost limit position of the connecting rod 6-4, the cut-off valve pad 6-5 forms a contact seal with the valve seat 7 to seal the cavity.

[0064] Embodiment 1

[0065] Normal use status (such as Figure 1 As shown), that is, when the cavity gas pressure is lower than the safety threshold, the diaphragm 6-1 drives the connecting rod 6-4 under the push of the gas pressure, so that the overpressure cut-off valve 6 adjusts the relative position distance with the cavity, thereby changing the size of the cavity volume to achieve the control of the gas flow pressure of the gas outlet valve channel and keep it within the safety threshold range.

[0066] Embodiment 2

[0067] When the outlet flow is zero (such as Figure 2As shown), that is, when the gas pressure in the cavity exceeds the safety threshold, the diaphragm 6-1 drives the connecting rod 6-4 to slide to the uppermost limit position of the valve body under the push of the gas, so that the cut-off valve pad 6-5 forms a contact seal with the valve seat 7, thereby making the overpressure cut-off valve 6 seal the cavity; at the same time, the sliding stroke of the air intake regulating component 5 in the air intake valve channel will reach the maximum, that is, the air intake regulating component 5 will slide to the rightmost limit position, thereby making the air intake regulating component 5 form a contact seal with the air intake valve channel to achieve a sealing effect; while interrupting the transmission of the gas, a double seal of the valve body is achieved to avoid internal leakage of the cavity, thereby further ensuring the reliability of the sealing effect.

[0068] Embodiment 3

[0069] When the air intake pressure regulating assembly 5 and the air intake valve seal fail (such as the attached Figure 3 As shown in the figure, the high-pressure flow gas in the cavity acts on the diaphragm 6-1, driving the connecting rod 6-4 to slide to the uppermost limit position, so that the cut-off valve pad 5 and the valve seat 7 form a contact seal, completing the sealing of the cavity and preventing the high-pressure gas from flowing out of the valve body outlet valve channel; at the same time, in the overpressure cut-off state, when the gas flow pressure drops to the safety threshold, the cut-off valve pad 5 is separated from the valve seat 7 under the action of the pressure regulating spring 3, that is, the contact seal on the intake valve channel is simultaneously released, so that the pressure regulator automatically resumes the gas supply without the need for manual secondary valve opening.

[0070] As a preferred embodiment, the air intake adjustment assembly 5 includes: a push rod 5-2, a cut-off spring 4;

[0071] The push rod 5-2 is slidably disposed in the intake valve passage of the valve body, and one end thereof abuts against the inclined platform;

[0072] One end of the cut-off spring 4 is fixed in the intake valve channel through a valve channel nut, and the other end is fixed on the push rod 5 - 2 .

[0073] As a preferred embodiment, the push rod 5-2 is also fixed with a pressure regulating valve seat 5-1, and a steel ball 5-3 is rolled;

[0074] The steel ball 5-3 abuts against the ramp under the elastic force of the cut-off spring 4;

[0075] When in overpressure, the push rod 5-2 will move to the rightmost limit position, so that the pressure regulating valve seat 5-1 forms a contact seal with the intake valve channel;

[0076] When the pressure returns to normal, the cut-off spring 4 will drive the push rod 5-2 to slide to the left, releasing the seal of the pressure regulating valve seat 5-1 on the intake valve channel.

[0077] As a preferred embodiment, the air intake regulating assembly 5 and the overpressure cut-off valve 6 both adopt a forward sealing structure, that is, during the contact sealing process, the stronger the gas pressure, the better the contact sealing effect.

[0078] As a preferred embodiment, the overpressure cut-off valve 6, the air intake regulating assembly 5 and the valve body form the cavity.

[0079] When the gas pressure exceeds the safety threshold, the pressure in the closed cavity is kept stable by the overpressure cut-off valve 6 and the air intake regulating assembly 5, thereby preventing internal leakage.

[0080] What is described above is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent substitutions or changes according to the technical scheme and concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A voltage regulator with overpressure cut-off and automatic reset, characterized by: include: Valve body, air intake adjustment component (5), overpressure cut-off valve (6); The overpressure cut-off valve (6) is slidably disposed in the valve body and reciprocates in the valve body according to the pressure in the cavity of the valve body; The air intake regulating component (5) is slidably arranged in the air intake valve passage of the valve body, and the overpressure cut-off valve (6) reciprocates to regulate the air intake regulating component (5) to slide left and right in the air intake valve passage; when the overpressure cut-off valve (6) moves to the uppermost limit position, the air intake regulating component (5) cuts off the air intake valve passage; When the pressure in the cavity is normal, the overpressure cut-off valve (6) moves downward to adjust the air intake adjustment component (5), so that the air intake adjustment component (5) opens the air intake valve channel.

2. A voltage regulator with overpressure cutoff and automatic reset according to claim 1, characterized in that: Also includes: Voltage regulating components; The pressure regulating assembly comprises: a connecting rod (6-4), a diaphragm (6-1), a pressure plate (6-2), and a pressure regulating spring (3); The diaphragm (6-1) is fixed on the valve body and fixedly connected to one end of the pressure regulating spring (3); the other end of the pressure regulating spring (3) is fixed on the valve body; The connecting rod (6-4) is slidably arranged on the valve body, and one end thereof penetrates through the diaphragm (6-1) and is fixedly connected via the pressure plate (6-2); When the pressure is normal, the connecting rod (6-4) slides up and down in the valve body under the change of the cavity pressure, thereby causing the overpressure cut-off valve (6) to move up and down in the valve body; When the pressure is too high and the air intake regulating assembly (5) fails, the diaphragm (6-1) drives the connecting rod (6-4) to slide to the uppermost limit position, so that the overpressure cut-off valve (6) can achieve contact sealing with the cavity, thereby making the gas pressure of the outlet valve channel zero; When the pressure returns to normal, the pressure regulating spring (3) drives the connecting rod (6-4) to cause the overpressure cut-off valve (6) to release the seal on the cavity.

3. A voltage regulator with overpressure cutoff and automatic reset according to claim 2, characterized in that: A screw is fixed at one end of the connecting rod (6-4), and an inclined platform is fixed at the other end; an overpressure cut-off valve (6) is also provided on the connecting rod (6-4); The screw rod is fixedly connected to the pressure plate (6-2) via a compression nut (6-3) so as to securely connect the connecting rod (6-4) to the diaphragm (6-1); The inclined platform abuts against the air intake adjustment component (5).

4. A voltage regulator with overpressure cutoff and automatic reset according to claim 3, characterized in that: The overpressure cut-off valve (6) comprises: a cut-off valve pad (6-5), a valve seat (7), and a sealing ring (8); The cut-off valve pad (6-5) is fixed on the inclined platform; The valve seat (7) is mounted on the valve body via the sealing ring (8); When the cut-off valve pad (6-5) slides to the uppermost limit position of the connecting rod (6-4), the cut-off valve pad (6-5) forms a contact seal with the valve seat (7), thereby sealing the cavity.

5. The voltage regulator with overpressure cutoff and automatic reset according to claim 3, characterized in that: The air intake adjustment component (5) comprises: a push rod (5-2) and a cut-off spring (4); The push rod (5-2) is slidably arranged in the air intake valve passage of the valve body, and one end thereof abuts against the inclined platform; One end of the cut-off spring (4) is fixed in the intake valve channel via a valve channel nut, and the other end is fixed on the push rod (5-2).

6. A voltage regulator with overpressure cutoff and automatic reset according to claim 5, characterized in that: The push rod (5-2) is also fixed with a pressure regulating valve seat (5-1) and is provided with a rolling steel ball (5-3); The steel ball (5-3) abuts against the inclined platform under the elastic force of the cutting spring (4); When in overpressure, the push rod (5-2) will move to the rightmost limit position, so that the pressure regulating valve seat (5-1) and the intake valve passage form a contact seal; When the pressure returns to normal, the cut-off spring (4) drives the push rod (5-2) to slide to the left, thereby releasing the seal of the pressure regulating valve seat (5-1) on the intake valve channel.

7. The voltage regulator with overpressure cutoff and automatic reset according to claim 1, characterized in that: The air intake adjustment component (5) and the overpressure cut-off valve (6) both adopt a forward sealing structure.

8. The voltage regulator with overpressure cutoff and automatic reset according to claim 2, characterized in that: The overpressure cut-off valve (6), the air intake adjustment component (5) and the valve body form the cavity.

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