阅读说明：本技术 一种用于沼气双膜储气柜的超压保护器 (Overpressure protector for biogas double-membrane gas storage cabinet ) 是由 王伟 陆荣春 于 2020-07-04 设计创作，主要内容包括：本发明公开了一种用于沼气双膜储气柜的超压保护器,包括壳体,壳体内设置有主泄压孔和副泄压孔,副泄压孔与主泄压孔相连通,主泄压孔内安装有泄压阀,副泄压孔的出口位于泄压阀的出口侧,副泄压孔内安装有压力调节阀,壳体的进口处安装有压力传感器,压力传感器将压力信号传送至压力控制器,压力控制器控制压力调节阀的开度。本发明能够改进现有技术的不足,降低对柜体内部压力的扰动。(The invention discloses an overpressure protector for a biogas double-membrane gas storage cabinet, which comprises a shell, wherein a main pressure relief hole and an auxiliary pressure relief hole are arranged in the shell, the auxiliary pressure relief hole is communicated with the main pressure relief hole, a pressure relief valve is arranged in the main pressure relief hole, an outlet of the auxiliary pressure relief hole is positioned at the outlet side of the pressure relief valve, a pressure regulating valve is arranged in the auxiliary pressure relief hole, a pressure sensor is arranged at an inlet of the shell, the pressure sensor transmits a pressure signal to a pressure controller, and the pressure controller controls the opening of the pressure regulating valve. The invention can improve the defects of the prior art and reduce the disturbance to the internal pressure of the cabinet body.)

1. The utility model provides an overvoltage protector for two membrane gas storage cabinets of marsh gas which characterized in that: including casing (1), be provided with main pressure release hole (2) and vice pressure release hole (3) in casing (1), vice pressure release hole (3) are linked together with main pressure release hole (2), install relief valve (4) in main pressure release hole (2), the export of vice pressure release hole (3) is located the outlet side of relief valve (4), install pressure regulating valve (5) in vice pressure release hole (3), pressure sensor (6) are installed to the import department of casing (1), pressure sensor (6) convey pressure signal to pressure controller (7), the aperture of pressure controller (7) control pressure regulating valve (5).

2. An overpressure protector for a biogas double-membrane gas storage tank as claimed in claim 1, wherein: the pressure controller (7) comprises an input signal converter (8) and an output signal stabilizer (9) which are arranged in series, the input signal converter (8) is used for converting pressure signals into valve opening signals, and the output signal stabilizer (9) is used for processing the valve opening signals and improving the stability of valve opening control.

3. An overpressure protector for a biogas double-membrane gas storage tank as claimed in claim 2, wherein: an input end (IN) of the output signal stabilizer (9) is connected to a forward input end of a first operational amplifier (A1) through a first capacitor (C1), a forward input end of the first operational amplifier (A1) is grounded through a first resistor (R1), an inverting input end of the first operational amplifier (A1) is grounded through a second resistor (R2), an inverting input end of the first operational amplifier (A1) is connected to an output end of the first operational amplifier (A1) through a third resistor (R3), an output end of the first operational amplifier (A1) is connected to a forward input end of the second operational amplifier (A2) through a fourth resistor (R4) and a fifth resistor (R5) which are connected IN series, a forward input end of the second operational amplifier (A2) is grounded through a second capacitor (C2), an inverting input end of the second operational amplifier (A2) is connected to a forward input end of the fourth resistor (R4) and a fifth resistor (R3) through a third capacitor (C3) which are connected IN series, an inverting input end of the second operational amplifier (A2) is connected to an inverting input end of the second operational amplifier (A58 2), the output end of the second operational amplifier (A2) is connected to the inverting input end of a fourth operational amplifier (A4) through a sixth resistor (R6), the inverting input end of the fourth operational amplifier (A4) is connected to the output end of a fourth operational amplifier (A4) through a fifth capacitor (C5), the forward input end of the fourth operational amplifier (A4) is grounded through a seventh resistor (R7), the output end of the first operational amplifier (A1) is connected to the forward input end of a third operational amplifier (A3) through a sixth capacitor (C6) and a seventh capacitor (C7) which are connected in series, the output end between the sixth capacitor (C6) and the seventh capacitor (C7) is grounded through an eighth resistor (R84), the forward input end of the third operational amplifier (A3) is connected to the output end of A3) through a ninth resistor (R9), the inverting input end of the third operational amplifier (A3) is connected to the base of an eleventh triode (A37Q 3) through a tenth resistor (R10), the base electrode of the triode (Q) is connected to the collector electrode of the triode (Q), the collector electrode of the triode (Q) is connected to the positive input end of the fourth operational amplifier (A4) through a twelfth resistor (R12), the emitting electrode of the triode (Q) is grounded through an eighth capacitor (C8), and the output end of the fourth operational amplifier (A4) serves as the output end (OUT) of the signal stabilizer (9).

4. An overpressure protector for a biogas double-membrane gas storage tank as claimed in claim 3, wherein: the pressure relief valve (4) comprises a valve body (10), a valve sleeve (11) is sleeved on the outer side of the valve body (10) in a sliding mode, the valve sleeve (11) is connected with the valve body (10) through a spring (16), a sealing plate (12) in sealing contact with the top surface of the valve body (10) is fixed to the top of the valve sleeve (11), a sealing ring (13) in sliding sealing with the side surface of the valve body (10) is fixed to the bottom of the valve sleeve (11), an exhaust hole (14) is formed in the inner side wall of the valve sleeve (11), an elastic sheet (15) corresponding to the exhaust hole (14) is fixed to the outer side wall of the valve body (10), and the elastic.

5. An overpressure protector for a biogas double-membrane gas storage tank as claimed in claim 4, wherein: the inside end of the exhaust hole (14) is provided with a plurality of step parts (17), and the step parts (17) are in clearance fit with the elastic sheet (15).

6. An overpressure protector for a biogas double-membrane gas storage tank as claimed in claim 5, wherein: the bottom surface of the sealing plate (12) is fixed with a filter screen (18), the filter screen (18) is in sliding contact with the valve body (10), the inner side of the filter screen (18) is provided with a plurality of spiral backflow grooves (19), and a plurality of louver boards (20) are fixed inside the spiral backflow grooves (19) in a staggered mode.

Technical Field

The invention relates to a methane storage safety device, in particular to an overpressure protector for a methane double-membrane gas storage cabinet.

Background

The double-film gas storage cabinet is a methane storage device widely used in the methane industry. Due to the limitation of tensile strength of the membrane material of the gas storage cabinet, the double-membrane gas storage cabinet can only work in a lower pressure state. In order to prevent the biogas overpressure generated by anaerobic fermentation from damaging the gas holder, an overpressure protection device must be installed on the gas holder. The conventional overpressure protection device has large pressure disturbance on the interior of the cabinet body during action, and normal conveying of methane is influenced.

Disclosure of Invention

The invention aims to provide an overpressure protector for a biogas double-membrane gas storage cabinet, which can overcome the defects of the prior art and reduce the disturbance on the internal pressure of a cabinet body.

In order to solve the technical problems, the technical scheme adopted by the invention is as follows.

The utility model provides an superpressure protector for two membrane gas storage cabinets of marsh gas, which comprises a housin, be provided with main pressure release hole and vice pressure release hole in the casing, vice pressure release hole communicates with main pressure release hole, install the relief valve in the main pressure release hole, the export in vice pressure release hole is located the outlet side of relief valve, install pressure regulating valve in the vice pressure release hole, pressure sensor is installed to the import department of casing, pressure sensor conveys pressure signal to pressure controller, pressure controller controls pressure regulating valve's aperture.

Preferably, the pressure controller includes an input signal converter and an output signal stabilizer which are connected in series, the input signal converter is configured to convert the pressure signal into a valve opening signal, and the output signal stabilizer is configured to process the valve opening signal, so as to improve stability of valve opening control.

Preferably, the input end of the output signal stabilizer is connected to the forward input end of the first operational amplifier through a first capacitor, the forward input end of the first operational amplifier is grounded through a first resistor, the reverse input end of the first operational amplifier is grounded through a second resistor, the reverse input end of the first operational amplifier is connected to the output end of the first operational amplifier through a third resistor, the output end of the first operational amplifier is connected to the forward input end of the second operational amplifier through a fourth resistor and a fifth resistor which are connected in series, the forward input end of the second operational amplifier is grounded through a second capacitor, the reverse input end of the second operational amplifier is connected between the fourth resistor and a fifth resistor through a third capacitor, the reverse input end of the second operational amplifier is connected to the output end of the second operational amplifier through a fourth capacitor, the output end of the second operational amplifier is connected to the reverse input end of the fourth operational amplifier through a sixth resistor, and the reverse input end of the fourth operational amplifier is connected to the output end of the fourth operational amplifier through a fifth capacitor, the forward input end of the fourth operational amplifier is grounded through a seventh resistor, the output end of the first operational amplifier is connected to the forward input end of the third operational amplifier through a sixth capacitor and a seventh capacitor which are connected in series, the sixth capacitor and the seventh capacitor are grounded through an eighth resistor, the forward input end of the third operational amplifier is connected to the output end of the third operational amplifier through a ninth resistor, the reverse input end of the third operational amplifier is grounded through a tenth resistor, the output end of the third operational amplifier is connected to the base electrode of the triode through an eleventh resistor, the base electrode of the triode is connected to the collector electrode of the triode, the collector electrode of the triode is connected to the forward input end of the fourth operational amplifier through a twelfth resistor, the emitter electrode of the triode is grounded through an eighth capacitor, and the output end of the fourth operational amplifier is used as the output end of the signal stabilizer.

Preferably, the relief valve includes the valve body, and the outside of valve body slides and has cup jointed the valve barrel, and the valve barrel passes through spring coupling with the valve body, and the top of valve barrel is fixed with the closing plate with valve body top surface sealing contact, and the bottom of valve barrel is fixed with the sealing washer with valve body side sliding seal, and the inside wall of valve barrel is provided with the exhaust hole, and the lateral wall of valve body is fixed with the shell fragment that corresponds with the exhaust hole, and the shell fragment is pegged graft with the exhaust hole.

Preferably, the inner side end of the exhaust hole is provided with a plurality of step parts, and the step parts are in clearance fit with the elastic sheets

Preferably, a filter screen is fixed on the bottom surface of the sealing plate, the filter screen is in sliding contact with the valve body, a plurality of spiral backflow grooves are formed in the inner side of the filter screen, and a plurality of louver boards are fixed in the spiral backflow grooves in a staggered mode

Adopt the beneficial effect that above-mentioned technical scheme brought to lie in: according to the invention, the pressure relief valve and the pressure regulating valve are arranged, so that the pressure of the cabinet body is accurately controlled through the pressure regulating valve when the cabinet body is in a safe pressure range, and once the pressure of the cabinet body exceeds the limit, the pressure relief valve is opened to realize rapid pressure relief, thereby reducing the disturbance of the pressure relief of the cabinet body by independently using the pressure relief valve while ensuring the safety of the cabinet body. The invention specially designs a pressure controller for controlling the opening of the pressure regulating valve. The traditional pressure controller adopts a logic chip to process signals, and has high cost and poor stability. The pressure controller provided by the invention adopts a non-logic chip circuit to process signals, controls the opening of the valve by using low-frequency signals, and synchronously adjusts the sampling of the low-frequency signals through the change of the high-frequency signals, thereby avoiding the disturbance of the pressure of the cabinet body caused by frequent actions of the valve and prolonging the service life of the valve. The specially designed pressure release valve adopts a two-stage sealing structure, so that the sealing performance of closing the pressure release valve can be effectively ensured. Through setting up the step portion, can form cascaded switching process in the exhaust hole switching process, reduce the disturbance to cabinet internal pressure when the relief valve moves. The filter screen plays the effect of filtering impurity on the one hand, and more importantly is through the spiral backward flow groove that has the shutter plate, collects the condensate water droplet in the air current, avoids the condensate water to collect between valve body and valve barrel.

Drawings

FIG. 1 is a block diagram of one embodiment of the present invention.

Fig. 2 is a block diagram of a pressure controller in accordance with an embodiment of the present invention.

Fig. 3 is a block diagram of an output signal stabilizer in an embodiment of the present invention.

Fig. 4 is a structural diagram of a pressure relief valve in an embodiment of the present invention.

FIG. 5 is a structural view of a spiral reflux drum in one embodiment of the present invention.

Detailed Description

The standard parts used in the invention can be purchased from the market, the special-shaped parts can be customized according to the description and the description of the attached drawings, and the specific connection mode of each part adopts the conventional means of mature bolts, rivets, welding, sticking and the like in the prior art, and the detailed description is not repeated.

Referring to fig. 1 to 5, a specific embodiment of the present invention includes a housing 1, a main pressure relief hole 2 and an auxiliary pressure relief hole 3 are disposed in the housing 1, the auxiliary pressure relief hole 3 is communicated with the main pressure relief hole 2, a pressure relief valve 4 is disposed in the main pressure relief hole 2, an outlet of the auxiliary pressure relief hole 3 is located at an outlet side of the pressure relief valve 4, a pressure regulating valve 5 is disposed in the auxiliary pressure relief hole 3, a pressure sensor 6 is disposed at an inlet of the housing 1, the pressure sensor 6 transmits a pressure signal to a pressure controller 7, and the pressure controller 7 controls an opening degree of the pressure regulating valve 5. The pressure controller 7 comprises an input signal converter 8 and an output signal stabilizer 9 which are arranged in series, the input signal converter 8 is used for converting a pressure signal into a valve opening signal, and the output signal stabilizer 9 is used for processing the valve opening signal, so that the stability of valve opening control is improved.

An input end IN of the output signal stabilizer 9 is connected to a forward input end of the first operational amplifier a1 through a first capacitor C1, a forward input end of the first operational amplifier a1 is connected to the ground through a first resistor R1, an inverting input end of the first operational amplifier a1 is connected to the ground through a second resistor R2, an inverting input end of the first operational amplifier a1 is connected to an output end of the first operational amplifier a1 through a third resistor R3, an output end of the first operational amplifier a1 is connected to a forward input end of the second operational amplifier a2 through a fourth resistor R4 and a fifth resistor R5 connected IN series, a forward input end of the second operational amplifier a2 is connected to the ground through a second capacitor C2, an inverting input end of the second operational amplifier a2 is connected between a fourth resistor R4 and a fifth resistor R5 through a third capacitor C9, an inverting input end of the second operational amplifier a2 is connected to an output end of the second operational amplifier a2 through a fourth capacitor C4, and an inverting input end of the second operational amplifier a 36 2 is connected to a fourth resistor R6, the inverting input terminal of the fourth operational amplifier a4 is connected to the output terminal of the fourth operational amplifier a4 through a fifth capacitor C5, the forward input terminal of the fourth operational amplifier a4 is grounded through a seventh resistor R7, the output terminal of the first operational amplifier a1 is connected to the forward input terminal of the third operational amplifier A3 through a sixth capacitor C6 and a seventh capacitor C7 connected in series, the ground is connected between the sixth capacitor C6 and the seventh capacitor C7 through an eighth resistor R8, the forward input terminal of the third operational amplifier A3 is connected to the output terminal of the third operational amplifier A3 through a ninth resistor R9, the inverting input terminal of the third operational amplifier A3 is grounded through a tenth resistor R10, the output terminal of the third operational amplifier A3 is connected to the base of the triode Q through an eleventh resistor R11, the base of the triode Q is connected to the collector of the triode Q, the collector of the triode Q is connected to the forward input terminal of the fourth operational amplifier a4 through a twelfth resistor R12, the emitter of the triode Q is connected to the ground through A8, the output terminal of the fourth op-amp a4 serves as the output terminal OUT of the signal stabilizer 9.

The first resistor R1 is 2.3k Ω, the second resistor R2 is 0.5 k Ω, the third resistor R3 is 1.3 k Ω, the fourth resistor R4 is 4 k Ω, the fifth resistor R5 is 0.2 k Ω, and the sixth resistor R6 is 0.35 k Ω. The seventh resistor R7 is 0.9 k Ω, the eighth resistor R8 is 0.25 k Ω, the ninth resistor R9 is 1.5 k Ω, the tenth resistor R10 is 1 k Ω, the eleventh resistor is 0.6 k Ω, the twelfth resistor R12 is 0.5 k Ω, the first capacitor C1 is 250 μ F, the second capacitor C2 is 400 μ F, the third capacitor C3 is 100 μ F, the fourth capacitor C4 is 700 μ F, the fifth capacitor C5 is 500 μ F, the sixth capacitor C6 is 550 μ F, the seventh capacitor C7 is 350 μ F, and the eighth capacitor C8 is 700 μ F.

The pressure release valve 4 comprises a valve body 10, a valve sleeve 11 is sleeved on the outer side of the valve body 10 in a sliding mode, the valve sleeve 11 is connected with the valve body 10 through a spring 16, a sealing plate 12 in sealing contact with the top surface of the valve body 10 is fixed to the top of the valve sleeve 11, a sealing ring 13 in sliding sealing with the side surface of the valve body 10 is fixed to the bottom of the valve sleeve 11, an exhaust hole 14 is formed in the inner side wall of the valve sleeve 11, an elastic sheet 15 corresponding to the exhaust hole 14 is fixed to the outer side wall of the valve body. The inside end of the exhaust hole 14 is provided with a plurality of step parts 17, and the step parts 17 are in clearance fit with the elastic sheet 15. A filter screen 18 is fixed on the bottom surface of the sealing plate 12, the filter screen 18 is in sliding contact with the valve body 10, a plurality of spiral backflow grooves 19 are formed in the inner side of the filter screen 18, and a plurality of louver plates 20 are fixed in the spiral backflow grooves 19 in a staggered mode.

In addition, the connecting line of the exhaust hole 14 and the auxiliary pressure relief hole 3 is parallel to the axis of the main pressure relief hole 2, a boss 21 is arranged on the sealing plate 12, the boss 21 is in sliding contact with the outlet of the auxiliary pressure relief hole 3, a diversion groove 22 is arranged on the surface of the boss 21, the diversion groove 22 is communicated with the auxiliary pressure relief hole 3, and the depth of the diversion groove 22 is gradually reduced from the position close to the auxiliary pressure relief hole 3 to the other end. When the sealing plate 12 is pushed out of the relief valve to be opened, the boss 21 slides to the outlet of the auxiliary relief hole 3 to cover the outlet of the auxiliary relief hole 3, so that the airflow flowing out of the auxiliary relief hole 3 is reduced and flows out of the guide groove 22, and the airflow flowing out of the guide groove 22 can form a guide airflow area on the side wall of the main relief hole 2, thereby reducing the turbulence near the side wall of the main relief hole 2.

The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.