Gear and rack transmission gas pressure adjusting device

Abstract

The utility model belongs to the technical field of gas pressure regulation, and particularly relates to a gear rack transmission gas pressure regulation device which comprises a pipe section, a pilot valve, a membrane cavity and a butterfly plate, the butterfly plate is installed in the pipe section, the outer diameter of the butterfly plate is matched with the inner diameter of the pipe section, an inlet of the pipe section is communicated with a left cavity of the membrane cavity through the pilot valve, and a right cavity of the membrane cavity is communicated with an outlet of the pipe section. A gear and rack device is arranged in the film cavity, the gear and rack device is connected with the butterfly plate, the gear and rack device can move in the film cavity and drive the butterfly plate to rotate, the pressure adjusting process is smooth, clamping stagnation is avoided, and the problem that a traditional connecting rod type gas pressure adjusting device is prone to being clamped stagnation is solved.

Description

Technical Field

[0001] The utility model belongs to the technical field of gas pressure regulation, and in particular relates to a rack and pinion transmission gas pressure regulating device. Background Art

[0002] At present, connecting rod-type gas pressure regulating devices are generally used in environmental control systems to regulate the pressure in the system pipeline. Under vibration conditions, connecting rod-type gas pressure regulating devices are prone to getting stuck, resulting in pressure imbalance in the system pipeline and affecting the use of downstream equipment. Therefore, it is necessary to propose a gear rack transmission pressure regulating device. Under the gas pressure regulation environment, the valve opening is controlled by gear rack transmission through the action of reference pressure and outlet pressure to achieve outlet pressure regulation. Utility Model Content

[0003] Purpose of this utility model: This utility model provides a rack-and-pinion gas pressure regulator. Under gas pressure regulation conditions, this device controls the valve opening via a rack-and-pinion transmission, based on the interaction between a reference pressure and the outlet pressure, to achieve outlet pressure regulation. The pressure regulation process is smooth and prevents sticking, addressing the problem of sticking that can occur with conventional connecting rod-type gas pressure regulators.

[0004] Technical solution:

[0005] A gear rack transmission gas pressure regulating device includes a pipe section 1, a pilot valve 2, a membrane cavity 3, and a butterfly plate 4. The butterfly plate 4 is installed in the pipe section 1, and its outer diameter matches the inner diameter of the pipe section 1. The inlet of the pipe section 1 is connected to the left cavity of the membrane cavity 3 through the pilot valve 2, and the right cavity of the membrane cavity 3 is connected to the outlet of the pipe section 1. A gear rack device is provided in the membrane cavity 3, and the gear rack device is connected to the butterfly plate 4. The gear rack device can move in the membrane cavity 3 to drive the butterfly plate to rotate.

[0006] Furthermore, the rack and pinion device includes a large piston, a small piston and a rack shaft. The large piston is connected to the left end of the rack shaft, and the large piston slides with the membrane chamber 3. The small piston is connected to the right end of the rack shaft through a thread, and the small piston slides with the membrane chamber 3. A rack is set on the rack shaft, the rack is engaged with the gear, and the gear is connected to the butterfly plate shaft. The gear moves through the rack and pinion device, driving the gear to rotate, thereby adjusting the opening of the butterfly plate.

[0007] Furthermore, a left cavity is formed between the large piston and the left inner wall of the membrane cavity 3 , and a right cavity is formed between the small piston and the right inner wall of the membrane cavity 3 .

[0008] Furthermore, a dynamic sealing ring is provided between the outer cylindrical surface of the large piston and the inner wall of the membrane cavity 3; a dynamic sealing ring is also provided between the outer cylindrical surface of the small piston and the inner wall of the membrane cavity 3.

[0009] Furthermore, the butterfly plate shaft passes through the pipe section 1 and the cavity 3 and is connected to the gear. A bearing is provided on the pipe section 1 and is connected to the butterfly plate shaft.

[0010] Furthermore, a compression gasket is provided on the bearing for compressing the outer ring of the bearing.

[0011] Furthermore, a sealing ring is provided on the contact surface between the compression gasket and the butterfly plate shaft; and a sealing ring is provided on the contact surface between the compression gasket and the pipe section 1.

[0012] Beneficial effects:

[0013] The present invention proposes a rack-and-pinion transmission gas pressure regulating device. When the inlet pressure of a pipe section enters the pilot valve 2 and the membrane chamber 3, the gas pressure pushes the large piston to the right in the membrane chamber. Because the rack shaft and the gear mounted thereon form a screw assembly, when the gear shaft moves, the gear rotates. The gear is connected to the butterfly plate shaft, which drives the butterfly plate to rotate via the butterfly plate shaft, opening the pipe section and regulating the inlet and outlet pressures. The present invention adjusts the outlet pressure value of the device by adjusting the opening of the butterfly valve. The rack-and-pinion transmission method of the present invention makes the pressure regulation process smooth and prevents jamming, thus solving the problem of traditional connecting rod-type gas pressure regulating devices being prone to jamming. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments of the present invention. It is obvious that the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative work.

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

[0016] Figure 2 This is the schematic diagram of the butterfly valve when it is open;

[0017] Figure 3 It is the schematic diagram of the membrane cavity structure;

[0018] Figure 4 This is the schematic diagram of the butterfly plate structure;

[0019] Among them, 1, pipe section, 2, pilot valve, 3, membrane cavity, 4, butterfly plate;

[0020] 3.1. Main valve housing, 3.2. Limit screw, 3.3. Large piston, 3.4. Gear, 3.5. Small piston,

[0021] 3.6 Fixing nut;

[0022] 4.1. Round plate, 4.2. Nut, 4.3. Fixing screw. DETAILED DESCRIPTION

[0023] To make the purpose, technical solutions, and advantages of the embodiments of the present invention more clear, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0024] The features and illustrative embodiments of various aspects of the present invention will be described in detail below. In the detailed description below, many specific details are set forth in order to provide a comprehensive understanding of the present invention. However, it will be apparent to those skilled in the art that the present invention can be implemented without some of these specific details. The following description of the embodiments is merely intended to provide a better understanding of the present invention by illustrating examples of the present invention. The present invention is in no way limited to any specific arrangement and method set forth below, but rather covers any improvements, replacements, and modifications of structures, methods, and devices without departing from the spirit of the present invention. In the accompanying drawings and the following description, well-known structures and techniques are not shown to avoid unnecessary ambiguity in the present invention.

[0025] It should be noted that, in the absence of conflict, the embodiments of the present invention and the features in the embodiments can be combined with each other, and the embodiments can refer to and quote each other. The present invention will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0026] like Figure 1 As shown, the utility model proposes a gear rack transmission gas pressure regulating device, including a pipe section 1, a pilot valve 2, a membrane cavity 3, and a butterfly plate 4. The butterfly plate 4 is installed in the pipe section 1, and its outer diameter matches the inner diameter of the pipe section 1. The inlet of the pipe section 1 is connected with the left cavity of the membrane cavity 3 through the pilot valve 2, and the right cavity of the membrane cavity 3 is connected with the outlet of the pipe section 1. A gear rack device is provided in the membrane cavity 3, and the gear rack device is connected to the butterfly plate 4. The gear rack device can move in the membrane cavity 3 to drive the butterfly plate to rotate.

[0027] Among them, the medium inlet of the pilot valve 2 is connected to the pipe section 1, and the medium outlet of the pilot valve 2 is connected to the left cavity formed between the large piston and the left inner wall of the membrane cavity 3; the outlet of the pipe section 1 is connected to the right cavity formed between the small piston and the right inner wall of the membrane cavity 3. The entire membrane cavity is composed of the main valve housing 3.1.

[0028] The outlet of pilot valve 2 is provided with an overflow port to realize the flow pressure reduction of gas. The inlet pressure of the device is reduced to the reference pressure value through the balance of spring force, atmospheric pressure and pilot valve outlet pressure. The pilot valve adopts mature pneumatic pilot valve products on the market, such as pilot solenoid valve.

[0029] The rack-and-pinion assembly comprises a large piston 3.3, a small piston 3.5, and a rack shaft. The large piston 3.3 is connected to the left end of the rack shaft and slides with the membrane chamber 3. A limit screw 3.2 is provided on the left end of the main valve housing 3.1 to define the left extreme position of the large piston 3.3. The small piston 3.5 is threadedly connected to the right end of the rack shaft and secured by a fixing nut 3.6. The small piston 3.3 slides with the membrane chamber 3. The rack shaft is provided with a rack that meshes with a gear 3.4, which is connected to the butterfly plate shaft. Movement of the rack-and-pinion assembly drives the rotation of the gear 3.4, thereby adjusting the opening of the butterfly plate 4. In addition, the intermediate cavity between the large piston 3.3 and the small piston 3.5 is provided with a vent hole connected to the outside world.

[0030] Among them, a dynamic sealing ring is arranged between the outer cylindrical surface of the large piston 3.3 and the inner wall of the membrane cavity 3; a dynamic sealing ring is also arranged between the outer cylindrical surface of the small piston 3.5 and the inner wall of the membrane cavity 3.

[0031] The butterfly plate shaft passes through the pipe section 1 and the cavity 3 and is connected to the gear 3.4. A bearing is provided on the pipe section 1 and is connected to the butterfly plate shaft. A compression gasket is provided on the bearing to compress the outer ring of the bearing. A sealing ring is provided on the contact surface between the compression gasket and the butterfly plate shaft; a sealing ring is provided on the contact surface between the compression gasket and the pipe section 1.

[0032] The butterfly plate 4 comprises a circular plate 4.1 adapted to the inner diameter of the pipe section 1. The circular plate 4.1 is fixed to the butterfly plate shaft by a nut 4.2 and a fixing screw 4.3.

[0033] When the inlet pressure of pipe section 1 enters pilot valve 2 and enters diaphragm chamber 3, the gas pressure pushes large piston 3.3 to the right in diaphragm chamber 3. Because the rack shaft and gear 3.4 mounted thereon form a screw assembly, when the gear shaft moves, gear 3.4 rotates. Gear 3.4 is connected to the butterfly plate shaft, which drives the butterfly plate 4 to rotate through the butterfly plate shaft, opening pipe section 1 and regulating the inlet and outlet pressures. The utility model adjusts the outlet pressure value of the device by adjusting the opening of the butterfly plate 4.

[0034] This utility model mainly has the following working conditions:

[0035] When the outlet pressure of pipe section 1 increases, the large and small pistons move leftward in diaphragm chamber 3, driving butterfly plate 4 to close and reducing the outlet pressure. Conversely, the large and small pistons move rightward in diaphragm chamber 3, driving butterfly plate 4 to open and increasing the outlet pressure, thus achieving the product outlet pressure regulation function.

[0036] The utility model makes the pressure regulating process smooth by the transmission mode of the rack and pinion without causing any jamming, thus solving the problem that the traditional gas pressure regulating device in the form of a connecting rod is prone to jamming.

[0037] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the field can easily think of various equivalent modifications or replacements within the technical scope disclosed in the present invention, and these modifications or replacements should all be included in the protection scope of the present invention.

Claims

1. A rack and pinion gas pressure regulating device, characterized in that: It includes a pipe section, a pilot valve, a membrane cavity, and a butterfly plate. The butterfly plate is installed in the pipe section, and its outer diameter matches the inner diameter of the pipe section. The pipe section inlet is connected to the left cavity of the membrane cavity through the pilot valve, and the right cavity of the membrane cavity is connected to the pipe section outlet. A gear rack device is provided in the membrane cavity, and the gear rack device is connected to the butterfly plate. The gear rack device can move in the membrane cavity to drive the butterfly plate to rotate; the gear rack device includes a large piston, a small piston and a rack shaft. The large piston is connected to the left end of the rack shaft, and the large piston slides with the membrane cavity. The small piston is connected to the right end of the rack shaft through a thread, and the small piston slides with the membrane cavity; a rack is provided on the rack shaft, the rack is meshed with the gear, and the gear is connected to the butterfly plate shaft, and moves through the gear rack device to drive the gear to rotate, thereby adjusting the opening of the butterfly plate.

2. The rack and pinion transmission gas pressure regulating device according to claim 1, characterized in that: A left cavity is formed between the large piston and the left inner wall of the membrane cavity, and a right cavity is formed between the small piston and the right inner wall of the membrane cavity.

3. The rack and pinion transmission gas pressure regulating device according to claim 2, characterized in that: A dynamic sealing ring is arranged between the outer cylindrical surface of the large piston and the inner wall of the membrane cavity; a dynamic sealing ring is also arranged between the outer cylindrical surface of the small piston and the inner wall of the membrane cavity.

4. The rack and pinion transmission gas pressure regulating device according to claim 2, characterized in that: The butterfly plate shaft passes through the pipe section and the cavity and is connected with the gear. A bearing is provided on the pipe section and is connected with the butterfly plate shaft.

5. The rack and pinion transmission gas pressure regulating device according to claim 4, characterized in that: A compression gasket is provided on the bearing to compress the outer ring of the bearing.

6. The rack and pinion transmission gas pressure regulating device according to claim 5, characterized in that: A sealing ring is provided on the contact surface between the compression gasket and the butterfly plate shaft; and a sealing ring is provided on the contact surface between the compression gasket and the pipe section.

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