Positive and negative pressure protector with mechanical counterweight and water seal dual safety protection

Abstract

The utility model discloses a mechanical counterweight and water seal dual safety protection positive and negative pressure protector which comprises a protection box, a pressure relief pipe is arranged above the protection box, a pressure relief plate is arranged above the pressure relief pipe, a counterweight block is arranged above the pressure relief plate, a first fixing rod is arranged on the right side of the counterweight block, a rotating rod is arranged on the upper side of the first fixing rod, and a second fixing rod is arranged on the right side of the rotating rod. When the biogas production rate is too high, the biogas continuously enters the protection box, the air pressure in the protection box is continuously increased, and when the air pressure in the protection box is larger than the external air pressure, the biogas pipe is arranged on the left side of the protection box, and the biogas pipe is arranged on the right side of the protection box. The water level in the protection box continuously drops to be lower than the pressure relief pipe, the biogas enters the pressure relief pipe to push the pressure relief plate to be opened, the biogas is discharged, and the air pressure in the protection box and the external air pressure are kept balanced.

Description

Technical Field

[0001] The utility model relates to a positive and negative pressure protector in the technical field of biogas pipe protection, in particular to a positive and negative pressure protector with mechanical counterweight and water seal dual safety protection. Background Art

[0002] The utility model relates to a positive and negative pressure protector for protecting the air pressure of a biogas pipe. When the biogas supply is insufficient, the continuous use of gas by the biogas terminal equipment will also cause negative pressure to form in the biogas fermentation tank, and the external air pressure will squeeze the fermentation tank and thus damage the fermentation tank. When the biogas supply is excessive, positive pressure will form in the fermentation tank, and in severe cases, the fermentation tank will explode. Therefore, the role of a positive and negative pressure protector capable of balancing the air pressure in the fermentation tank is reflected.

[0003] After searching, the existing Chinese patent publication number is CN201320173928.0. The utility model is a positive and negative pressure protector with mechanical counterweight and water seal dual safety protection, including a pressure regulating tank with supporting legs at the bottom, a partition is provided inside the pressure regulating tank, and the partition divides the inner cavity of the pressure regulating tank into an upper chamber and a lower chamber, and the lower chamber is filled with liquid; the pressure regulating tank is connected with a connecting pipe with one end extending out of the pressure regulating tank and the other end passing through the partition and extending into the lower chamber; the partition is provided with an exhaust pipe whose bottom end is immersed in the liquid in the lower chamber, and the upper end of the exhaust pipe is connected with the upper chamber, and the pressure regulating tank is provided with a pressure relief pipe connected with the upper chamber, and the top of the pressure relief pipe is installed with an upper liquid blocking cap forming an exhaust gap with the top of the pressure regulating tank; the top of the pressure regulating tank is provided with a liquid injection port, and the bottom of the pressure regulating tank is provided with a sewage outlet. The utility model can well adjust the system pressure of a biogas fermentation tank or a double membrane gas storage cabinet to ensure that the pressure is normal during its operation, so as to make it operate safely.

[0004] Although the above patent achieves the effect of regulating the air pressure in the fermentation tank to stabilize the normal operation of the fermentation tank, the water in the positive and negative pressure protector of the above patent needs to be replenished regularly, and when the water evaporates too much, the problem of biogas leakage will occur.

[0005] In response to the above problems, an innovative design is carried out based on the original positive and negative pressure protectors. Utility Model Content

[0006] The utility model aims to provide a positive and negative pressure protector with dual safety protection of mechanical counterweight and water seal, so as to solve the problem that water loss of water seal positive and negative pressure protectors on the current market will affect the water seal effect.

[0007] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a positive and negative pressure protector with dual safety protection of mechanical counterweight and water seal, including a protection box. Preferably, a pressure relief pipe is provided above the protection box, and a pressure relief plate is provided above the pressure relief pipe, a counterweight block is provided above the pressure relief plate, and a fixed rod one is provided on the right side of the counterweight block, and a rotating rod is provided on the top of the fixed rod one, a fixed rod two is provided on the left side of the rotating rod, and a movable rod is provided on the left side of the fixed rod two, and a pipeline is provided under the movable rod, and a biogas pipe is provided on the left side of the protection box.

[0008] Preferably, the protection box includes a box body, an air inlet and a hole, the air inlet is arranged on the left side of the box body, and the left end of the air inlet is connected to the biogas pipe, and a hole is arranged on the left side of the top of the protection box, the right side of the top of the box body is fixedly connected to the pressure relief pipe, and the upper end of the pressure relief pipe is connected to the pressure relief plate, and the pressure relief plate is connected to a counterweight block.

[0009] Preferably, the pipeline includes a pipeline 1, a slide groove and a groove, the slide groove is arranged in the middle of the pipeline 1, and the groove is arranged in the middle of the upper part of the pipeline 1, the upper end of the slide groove is connected to the groove, and the lower end of the slide groove is connected to the hole, the upper end of the pipeline 1 is connected to the fixing rod 2, and the lower end of the pipeline is connected to the top of the box.

[0010] Preferably, the movable rod includes a vertical rod, a fixed shaft and a piston, the upper end of the vertical rod is connected to the fixed shaft, and the lower end of the vertical rod is connected to the piston, the piston is engaged with a slide groove, and the piston moves up and down in the slide groove.

[0011] Preferably, the upper end of the second fixed rod is snap-connected to the middle of the rotating rod, and the rotating rod rotates on the second fixed rod, the left end of the rotating rod is snap-connected to the fixed shaft, and the rotating rod rotates on the fixed shaft, and the right end of the rotating rod is snap-connected to the first fixed rod, and the rotating rod rotates on the first fixed rod.

[0012] Compared with the prior art, the utility model has the following beneficial effects: it protects the air pressure in the fermentation tank to be stable and avoids damage to the fermentation tank;

[0013] 1. When the biogas production rate is too fast, the biogas will continuously enter the protection box, and the air pressure in the protection box will continue to increase. When the air pressure in the protection box is greater than the external air pressure, the water level in the protection box will continue to drop below the pressure relief pipe, and the biogas will enter the pressure relief pipe to push the pressure relief plate to open and discharge the biogas, so that the air pressure in the protection box is balanced with the external air pressure.

[0014] 2. When the biogas production rate decreases, the air pressure in the protection box will be lower than the outside air pressure. The outside air pressure will push the piston to move downward in the slide groove, thereby driving the rotating rod to rotate. The rotation of the rotating rod drives the fixed rod to move upward, thereby opening the pressure relief plate. The water level in the pressure relief pipe drops to below the bottom of the pressure relief pipe, and outside air will enter the protection box to keep the air pressure in the protection box balanced with the outside air pressure. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the cross-sectional structure of the utility model;

[0017] Figure 3 This is a schematic diagram of the enlarged structure of the pipeline of the utility model;

[0018] Figure 4 It is a schematic diagram of the enlarged structure of the movable rod of the utility model.

[0019] In the figure: 1, protection box; 101, box body; 102, air inlet; 103, hole; 2, pressure relief pipe; 3, pressure relief plate; 4, counterweight; 5, fixed rod 1; 6, pipeline; 601, pipeline 1; 602, slide groove; 603, groove; 7, movable rod; 701, vertical rod; 702, fixed shaft; 703, piston; 8, fixed rod 2; 9, rotating rod; 10, biogas pipe. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-4 The utility model provides a technical solution: a positive and negative pressure protector with mechanical counterweight and water seal dual safety protection, including a protection box 1, a pressure relief pipe 2 is arranged above the protection box 1, and a pressure relief plate 3 is arranged above the pressure relief pipe 2, a counterweight block 4 is arranged above the pressure relief plate 3, and a fixing rod 1 5 is arranged on the right side of the counterweight block 4, and a rotating rod 9 is arranged on the top of the fixing rod 1 5, a fixing rod 2 8 is arranged on the left side of the rotating rod 9, and a movable rod 7 is arranged on the left side of the fixing rod 2 8, and a pipeline 6 is arranged below the movable rod 8, and a biogas pipe 10 is arranged on the left side of the protection box 1;

[0022] When the fermentation tank produces biogas at a too fast rate, the biogas enters the protection box 1 through the biogas pipe 10. The air pressure in the protection box 1 increases with the entry of biogas. When the air pressure in the protection box 1 is greater than the external air pressure, the water level in the protection box 1 will drop below the lower end of the pressure relief pipe 2, and the biogas will enter the pressure relief pipe 2. The accumulated pressure of the biogas pushes the pressure relief plate 3 to open and then be discharged to the outside. The air pressure in the protection box 1 will continue to decrease and maintain a balance with the outside to avoid damage to the fermentation tank due to excessive air pressure. When the fermentation tank produces biogas at a too slow rate, very little biogas will enter the protection box 1, resulting in The air pressure is lower than the outside air pressure, and the outside air pressure will squeeze the movable rod 7 to move downward in the pipe 6. The movable rod 7 is engaged with the rotating rod 9, and the middle of the rotating rod 9 is engaged with the fixed rod 2 8. The movable rod 7 moves downward to drive the rotating rod 9 to rotate around the fixed rod 2 8, and then drives the fixed rod 1 5 to move upward. The fixed rod 1 5 moves upward to drive the pressure relief plate 3 to rotate and open, and the outside air enters the pressure relief pipe 2, squeezing the water level in the pressure relief pipe 2 to drop to below the lower end of the pressure relief pipe 2, so that the outside air enters the protection box 1, so that the air pressure in the protection box 1 is increased and kept balanced with the outside world, thereby avoiding damage to the fermentation tank.

[0023] The protection box 1 includes a box body 101, an air inlet 102 and a hole 103. The air inlet 102 is arranged on the left side of the box body 101, and the left end of the air inlet 102 is connected to the biogas pipe 10, and the hole 103 is arranged on the left side of the protection box 101. The right side of the box body 101 is fixedly connected to the pressure relief pipe 2, and the upper end of the pressure relief pipe 2 is connected to the pressure relief plate 3, and the pressure relief plate 3 is connected to the counterweight 4;

[0024] The counterweight block 4 can increase the pressure required for the pressure relief plate 3 to open.

[0025] The pipeline 6 includes a pipeline 1 601, a slide groove 602 and a groove 603. The slide groove 602 is arranged in the middle of the pipeline 1 601, and the groove 603 is arranged in the middle of the pipeline 1 601. The upper end of the slide groove 602 is connected to the groove 603, and the lower end of the slide groove 602 is connected to the hole 103. The upper end of the pipeline 1 601 is connected to the fixing rod 2 8, and the lower end of the pipeline 1 601 is connected to the top of the box 101.

[0026] The movable rod 7 includes a vertical rod 701, a fixed shaft 702 and a piston 703. The upper end of the vertical rod 701 is connected to the fixed shaft 702, and the lower end of the vertical rod 701 is connected to the piston 703. The piston 703 is engaged with the slide groove 602, and the piston 703 moves up and down in the slide groove 602.

[0027] The air pressure pushes the piston 703 to move up and down in the slide groove 602 . The up and down movement of the piston 703 drives the vertical rod 701 to move up and down. The up and down movement of the vertical rod 701 drives the fixed shaft 702 to move up and down.

[0028] The upper end of the fixed rod 2 8 is connected to the middle of the rotating rod 9, and the rotating rod 9 rotates on the fixed rod 2 8. The left end of the rotating rod 9 is connected to the fixed shaft 702, and the rotating rod 9 rotates on the fixed shaft 702. The right end of the rotating rod 9 is connected to the fixed rod 1 5, and the rotating rod 9 rotates on the fixed rod 1 5.

[0029] The fixed shaft 702 moves up and down to drive the rotating rod 9 to rotate around the fixed rod 2 8, and the rotating rod 9 rotates to drive the fixed rod 1 5 to rotate and move up and down at the same time.

[0030] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A positive and negative pressure protector with mechanical counterweight and water seal dual safety protection, comprising a protection box (1), characterized in that: A pressure relief pipe (2) is provided above the protection box (1), and a pressure relief plate (3) is provided above the pressure relief pipe (2), a counterweight (4) is provided above the pressure relief plate (3), and a fixing rod (5) is provided on the right side of the counterweight (4), and a rotating rod (9) is provided on the top of the fixing rod (5), a fixing rod (8) is provided on the left side of the rotating rod (9), and a movable rod (7) is provided on the left side of the fixing rod (8), and a pipeline (6) is provided below the movable rod (7), and a biogas pipe (10) is provided on the left side of the protection box (1).

2. A positive and negative pressure protector with mechanical counterweight and water seal dual safety protection according to claim 1, characterized in that: The protection box (1) comprises a box body (101), an air inlet (102) and a hole (103); the air inlet (102) is arranged on the left side of the box body (101), and the left end of the air inlet (102) is connected to the biogas pipe (10), and the hole (103) is arranged on the left side of the top of the box body (101); the right side of the top of the box body (101) is fixedly connected to the pressure relief pipe (2), and the upper end of the pressure relief pipe (2) is connected to the pressure relief plate (3), and the top of the pressure relief plate (3) is connected to a counterweight (4).

3. A positive and negative pressure protector with mechanical counterweight and water seal dual safety protection according to claim 1, characterized in that: The pipeline (6) comprises a pipeline (601), a slide groove (602) and a groove (603); the slide groove (602) is arranged in the middle of the pipeline (601), and the groove (603) is arranged in the middle of the pipeline (601); the upper end of the slide groove (602) is connected to the groove (603), and the lower end of the slide groove (602) is connected to the hole (103); the upper end of the pipeline (601) is connected to the fixing rod (8), and the lower end of the pipeline (601) is connected to the upper surface of the box (101).

4. The positive and negative pressure protector with mechanical counterweight and water seal dual safety protection according to claim 1, characterized in that: The movable rod (7) comprises a vertical rod (701), a fixed shaft (702) and a piston (703); the upper end of the vertical rod (701) is connected to the fixed shaft (702), and the lower end of the vertical rod (701) is connected to the piston (703); the piston (703) is engaged with the slide groove (602), and the piston (703) moves up and down in the slide groove (602).

5. According to claim 1, a positive and negative pressure protector with mechanical counterweight and water seal dual safety protection, characterized in that: The upper end of the second fixed rod (8) is snap-connected to the middle of the rotating rod (9), and the rotating rod (9) rotates on the second fixed rod (8); the left end of the rotating rod (9) is snap-connected to the fixed shaft (702), and the rotating rod (9) rotates on the fixed shaft (702); the right end of the rotating rod (9) is snap-connected to the first fixed rod (5), and the rotating rod (9) rotates on the first fixed rod (5).

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