Natural gas transmission pressure regulating device

Abstract

The utility model relates to the technical field of natural gas conveying, and discloses a natural gas conveying pressure regulating device which comprises a pressure regulating pipe, a gas inlet pipe and a gas outlet pipe, the gas inlet pipe and the gas outlet pipe are connected to the pressure regulating pipe, an inner regulating cylinder is arranged in the pressure regulating pipe, and a natural gas channel for natural gas to pass through is formed in the inner regulating cylinder. An adjusting plate capable of movably adjusting the size of the natural gas channel and a control shaft for driving the adjusting plate to move are further arranged in the pressure adjusting pipe, the adjusting plate is driven to reciprocate in the inner adjusting cylinder through rotation of the control shaft, and therefore the size of the natural gas channel is controlled, and the natural gas channel can be adjusted by controlling the flow. Therefore, the pressure of the natural gas entering the gas outlet pipe is controlled, the high-pressure natural gas in the gas inlet pipe is reduced to the required working pressure, the safety of the gas outlet pipe is ensured, and pipe breakage caused by too high pressure in the gas outlet pipe is avoided.

Description

Technical Field

[0001] The utility model relates to the field of natural gas transmission, in particular to a natural gas transmission pressure regulating device. Background Art

[0002] During the natural gas transportation process, the pressure in the pipeline system may fluctuate due to various factors such as pipeline length and temperature. In order to ensure the safe operation of the pipeline system and maintain the appropriate flow rate and pressure of natural gas during transportation, it is necessary to set up a pressure regulating station to adjust the pressure in the pipeline by adjusting valves or other devices. The natural gas pressure in the pipeline is adjusted to a predetermined range.

[0003] When natural gas is transported through a gas pipeline, it is usually high-pressure natural gas in the pipeline, but when users use it, such as when households use natural gas, they need a lower pressure. Moreover, if the pressure in the pipeline is too high, the risk of natural gas leakage and pipeline damage will increase. The pressure regulating device can reduce the natural gas pressure in the pipeline, improve safety, reduce the risk of natural gas leakage, reduce the pressure on the pipeline and other equipment, and protect the pipeline. Utility Model Content

[0004] In order to solve the technical problem of pressure regulation of natural gas transmission pipeline, the utility model provides a natural gas transmission pressure regulating device.

[0005] The utility model adopts the following technical scheme to achieve: a natural gas transmission and pressure regulating device, including an air inlet pipe and an air outlet pipe, one end of the air inlet pipe is connected to a pressure regulating pipe, and the pressure regulating pipe is provided with:

[0006] An inner regulating cylinder, wherein the inner regulating cylinder is fixedly connected to the pressure regulating pipe and is provided with a natural gas passage for the natural gas to pass through;

[0007] An adjusting plate, the adjusting plate is movably arranged inside the inner adjusting cylinder, and the adjusting plate can control the size of the natural gas channel;

[0008] A control shaft, one end of which is fixedly connected to the adjustment plate, and the other end of which extends out of the pressure regulating tube, and the control shaft is used to control the adjustment plate to move inside the inner adjustment cylinder.

[0009] Through the above technical solution, the control shaft controls the adjustment plate to move inside the inner adjustment cylinder, thereby controlling the size of the natural gas channel, and controlling the natural gas flow rate through the size of the natural gas channel, thereby controlling the pressure in the outlet pipe, reducing the high-pressure natural gas in the inlet pipe to the required working pressure, ensuring the safety of the outlet pipe, and avoiding rupture of the catheter caused by excessive pressure in the outlet pipe.

[0010] As a further improvement of the above solution, one end of the air outlet pipe is connected to the pressure regulating pipe, and pressure gauges are installed on both the air inlet pipe and the air outlet pipe.

[0011] Through the above technical solution, the press machine allows the operator to directly observe the internal natural gas pressure of the air inlet pipe and the air outlet pipe.

[0012] As a further improvement of the above scheme, the natural gas channel includes a fixed channel and an adjustable channel. A fixed channel is opened at the connection between the inner regulating cylinder and the inner wall of the pressure regulating tube, and the adjustable channel includes a plurality of through holes opened on the side wall of the inner regulating cylinder.

[0013] Through the above technical solution, the fixed channel is kept open for a long time, and the size of the total natural gas channel is controlled by opening or closing the adjustable channel.

[0014] As a further improvement of the above scheme, the control shaft includes a connecting part, a sleeve part and a rotating part, one end of the connecting part is fixedly connected to the adjustment plate, and the other end passes through the inner adjustment cylinder and is fixedly connected to the sleeve part, and one end of the rotating part is provided with a thread and is sleeved inside the sleeve part.

[0015] As a further improvement of the above solution, a limiting hole is provided on the connecting portion, and a limiting block is fixedly connected to the inner adjusting cylinder.

[0016] As a further improvement of the above solution, an internal thread is provided inside the sleeve portion, and a positioning ring is sleeved on the outside of the sleeve portion, and the positioning ring is fixedly connected to the inner wall of the pressure regulating tube.

[0017] As a further improvement of the above solution, one end of the rotating part away from the sleeve part extends out of the pressure regulating tube, and a shaft seal is provided between the rotating part and the pressure regulating tube.

[0018] According to the above technical solution, the end of the rotating part extending out of the voltage regulating tube needs to be connected to the power part (not shown in the figure), and the power part drives the rotating part to rotate. In actual use, a hand wheel can be connected to drive the rotating part to rotate by manually rotating the hand wheel, or a motor can be connected to drive the rotating part to rotate by the motor, and the above are all existing technologies.

[0019] In addition, through the cooperation of the limiting hole and the limiting block, the connecting part can only move horizontally along its own axis and cannot rotate, so when the rotating part rotates, the sleeve, the connecting part and the adjusting plate are driven to move, thereby adjusting the opening or closing of the adjustable channel.

[0020] Compared with the prior art, the beneficial effects of the present invention are:

[0021] The utility model controls the rotation of the control shaft to drive the adjustment plate to move back and forth inside the inner adjustment cylinder, thereby controlling the size of the natural gas channel, and controlling the flow rate, thereby controlling the pressure of the natural gas when it enters the outlet pipe, reducing the high-pressure natural gas in the inlet pipe to the required working pressure, ensuring the safety of the outlet pipe, and avoiding the rupture of the catheter caused by excessive pressure in the outlet pipe. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0023] Figure 2 This is a cross-sectional view of the pressure regulating pipe structure of the utility model;

[0024] Figure 3 This is a front view of the pressure regulating pipe structure of the utility model;

[0025] Figure 4 This is a schematic diagram of the structure of the inner adjustment cylinder and the adjustment plate of the utility model;

[0026] Figure 5 This is a schematic diagram of the control shaft structure of the utility model.

[0027] Explanation of main symbols: 1. Inlet pipe; 2. Outlet pipe; 3. Pressure gauge; 4. Pressure regulating pipe; 5. Inner regulating cylinder; 6. Natural gas channel; 61. Fixed channel; 62. Adjustable channel; 7. Adjusting plate; 8. Control shaft; 81. Connecting part; 82. Sleeve part; 83. Rotating part; 84. Limiting hole; 9. Limiting block; 10. Positioning ring; 11. Shaft seal. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings and specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form a new embodiment.

[0029] Please combine Figure 1 - Figure 5 A natural gas transmission and pressure regulating device of this embodiment includes an inlet pipe 1, an outlet pipe 2, and a pressure regulating pipe 4. One end of the inlet pipe 1 and the outlet pipe 2 are fixedly connected to the pressure regulating pipe 4 through a flange. Natural gas enters the pressure regulating pipe 4 from the inlet pipe 1 and then flows out from the outlet pipe 2. In addition, a pressure gauge 3 is installed on the inlet pipe 1 and the outlet pipe 2, so as to intuitively understand the pressure inside the inlet pipe 1 and the outlet pipe 2.

[0030] The pressure regulating tube 4 is configured to be thinner at both ends and thicker in the middle. An inner regulating tube 5 is fixedly connected inside the pressure regulating tube 4. First, the inner regulating tube 5 is a cylindrical structure with one end closed. In order to facilitate the passage of natural gas through the inner regulating tube 5, a natural gas channel 6 for the passage of natural gas is opened on the inner regulating tube 5, wherein the natural gas channel 6 includes a fixed channel 61 and an adjustable channel 62.

[0031] First, at the connection between the inner adjusting tube 5 and the inner wall of the pressure regulating tube 4, a fixed channel 61 is opened along the circumferential direction of the inner adjusting tube 5; in addition, the adjustable channel 62 includes a plurality of through holes opened on the outer wall of the inner adjusting tube 5, and the through holes are arranged axially along the inner adjusting tube 5.

[0032] That is, after the natural gas enters the pressure regulating tube 4 from the air inlet pipe 1, it reaches the inner regulating tube 5, so one end of the inner regulating tube 5 is closed, so the natural gas flows out from the fixed channel 61 and the adjustable channel 62, and after passing through the gap between the inner regulating tube 5 and the pressure regulating tube 4, it flows into the air outlet pipe 2 from one end of the pressure regulating tube 4. It should be noted that the gap between the inner regulating tube 5 and the pressure regulating tube 4 is large enough, that is, the difference between the outer diameter of the inner regulating tube 5 and the inner diameter of the pressure regulating tube 4 is large enough for the natural gas to pass through.

[0033] Because the natural gas pressure in the inlet pipe 1 responsible for transporting natural gas is relatively high, while the pressure required by the outlet pipe 2 for transporting natural gas to the user end is relatively low, in order to control the pressure, this embodiment adopts a method of controlling the amount of gas inlet into the outlet pipe 2. Therefore, a movable regulating plate 7 is provided inside the inner regulating cylinder 5, and a control shaft 8 is also provided, and the movement of the regulating plate 7 in the inner regulating cylinder 5 is controlled by the control shaft 8.

[0034] The adjusting plate 7 is a disc-shaped structure, and an elastic ring is provided on the side wall thereof, and is fitted with the inner wall of the inner adjusting cylinder 5 .

[0035] In addition, the control shaft 8 includes a connecting portion 81, a sleeve portion 82 and a rotating portion 83. First, one end of the connecting portion 81 is fixedly connected to the adjusting plate 7, and the other end passes through the inner adjusting cylinder 5 and extends out of the inner adjusting cylinder 5. At the same time, a cross-shaped limiting hole 84 is opened in the connecting portion 81, and a corresponding cross-shaped limiting block 9 is fixedly arranged on the side wall of the inner adjusting cylinder 5, that is, the connecting portion 81 can only move horizontally along its own axial direction and cannot rotate.

[0036] On the other hand, the limiting hole 84 and the limiting block 9 also provide limiting functions for the movement of the connecting portion 81 and the adjusting plate 7 , so that the limit positions at the left and right ends of the adjusting plate 7 correspond to the two ends (through holes) of the adjustable channel 62 .

[0037] One end of the sleeve portion 82 is fixedly connected to the connecting portion 81 extending from the inner connecting tube, and the other end is provided with an internal thread. A positioning ring 10 is sleeved on the outer side of the sleeve portion 82, and the positioning ring 10 is fixedly connected to the inner wall of the pressure regulating pipe 4.

[0038] Meanwhile, one end of the rotating part 83 is provided with a thread and inserted into the sleeve part 82, and the sleeve part 82 and the rotating part 83 are threadedly connected. In addition, one end of the rotating part 83 extends out of the pressure regulating pipe 4, and a bearing and a shaft seal 11 are installed between the rotating part 83 and the pressure regulating pipe 4. The shaft seal 11 does not affect the rotation of the rotating part 83 and does not cause internal natural gas leakage.

[0039] It should be noted that the end of the rotating part 83 extending out of the voltage regulating tube 4 needs to be connected to a power unit (not shown in the figure), which drives the rotating part 83 to rotate. In actual use, a hand wheel can be connected to drive the rotating part 83 to rotate by manually rotating the hand wheel, or a motor can be connected to drive the rotating part 83 to rotate by the motor, which are all prior arts.

[0040] The implementation process and principle of a natural gas transmission pressure regulating device in the embodiment of the present application are as follows:

[0041] (i) As described above, the connecting portion 81 and the sleeve portion 82 are fixedly connected and can only move in the axial direction and cannot rotate. Therefore, when the rotating portion 83 is controlled to rotate in the forward direction, the rotating portion 83 and the sleeve portion 82 are threadedly connected, so the sleeve portion 82 can be controlled to move.

[0042] by Figure 3 For example, when the sleeve portion 82 and the connecting portion 81 continue to move and approach the left end of the inner connecting tube (i.e., close to the fixed channel 61), the natural gas enters the pressure regulating tube 4 through the inlet pipe 1 and encounters the regulating plate 7. The regulating plate 7 and the inner wall of the inner regulating tube 5 are fitted together by the elastic ring, so the natural gas can only enter from the fixed channel 61 to the position between the inner regulating tube 5 and the pressure regulating tube 4, and then enter the outlet pipe 2 from the other end of the pressure regulating tube 4.

[0043] During this process, a portion of the natural gas will enter the inner regulating cylinder 5 from the adjustable channel 62, that is, the space between the right side of the regulating plate 7 and the inner regulating cylinder 5. However, the space here is small, and when the regulating plate 7 moves in the opposite direction, the natural gas can be squeezed out without affecting the main path of the natural gas flowing from the air inlet pipe 1 through the fixed channel 61 and finally out of the air outlet pipe 2. Therefore, the impact can be ignored.

[0044] In summary, when the regulating plate 7 is at the leftmost position, only the fixed channel 61 plays a role in circulating the natural gas, the flow rate is the smallest, and the pressure of the natural gas entering the gas outlet pipe 2 is also the smallest.

[0045] (II): On the contrary, if the rotating part 83 rotates in the opposite direction, the sleeve part 82 and the connecting part 81 drive the adjusting plate 7 to move to the rightmost position of the inner adjusting tube 5. At this time, after the natural gas enters the pressure regulating tube 4, the natural gas channel 6 is fully opened, and the natural gas can enter the gap between the inner adjusting tube 5 and the inner wall of the pressure regulating tube 4 from the fixed channel 61 and the adjustable channel 62, and finally enter the gas outlet pipe 2 from the other end of the pressure regulating tube 4.

[0046] As described above, the difference between the outer diameter of the inner regulating tube 5 and the inner diameter of the pressure regulating tube 4 is large enough for natural gas to pass through. Even if the shareholder channel and the adjustable channel 62 are all used, the gap between the inner regulating tube 5 and the pressure regulating tube 4 is large enough for natural gas to pass through.

[0047] When the regulating plate 7 is at the rightmost end, the natural gas channel 6 is fully open. At this time, the amount of natural gas passing through per unit time is the largest, the flow rate is the largest, and the pressure of the natural gas entering the outlet pipe 2 is the largest.

[0048] On the contrary, when the adjustment plate 7 moves between the leftmost and rightmost positions, the adjustable channel 62 can be controlled to be partially opened for use.

[0049] In summary, by controlling the rotation of the shaft 8, the regulating plate 7 can be driven to reciprocate inside the inner regulating tube 5, and the opening and closing of the adjustable channel 62 and the partial opening thereof can be controlled. Thus, the size of the natural gas channel 6 can be controlled, and the natural gas flow rate can be controlled. Thus, the pressure of the natural gas when it enters the gas outlet pipe 2 can be controlled. The high-pressure natural gas in the gas inlet pipe 1 can be reduced to the required working pressure, so as to ensure the safety of the gas outlet pipe 2 and avoid the rupture of the conduit caused by the excessive pressure in the gas outlet pipe 2.

[0050] The above-mentioned implementation modes are only preferred implementation modes of the present invention, and cannot be used to limit the protection scope of the present invention. Any non-substantial changes and substitutions made by technicians in this field on the basis of the present invention shall fall within the scope of protection required by the present invention.

Claims

1. A natural gas transmission and pressure regulating device, comprising an air inlet pipe and an air outlet pipe, characterized in that: One end of the air inlet pipe is connected to a pressure regulating pipe, and the pressure regulating pipe is provided with: An inner regulating cylinder, the inner regulating cylinder is fixedly connected in the pressure regulating pipe, and a natural gas channel for natural gas to pass through is opened on the inner regulating cylinder; An adjusting plate, the adjusting plate is movably arranged inside the inner adjusting cylinder, and the adjusting plate can control the size of the natural gas channel; A control shaft, one end of which is fixedly connected to the adjustment plate, and the other end of which extends out of the pressure regulating tube, and the control shaft is used to control the adjustment plate to move inside the inner adjustment cylinder.

2. The natural gas transmission and pressure regulating device according to claim 1, characterized in that: One end of the air outlet pipe is connected to the pressure regulating pipe, and pressure gauges are installed on both the air inlet pipe and the air outlet pipe.

3. The natural gas transmission and pressure regulating device according to claim 1, characterized in that: The natural gas channel includes a fixed channel and an adjustable channel. The fixed channel is provided at the connection between the inner regulating tube and the inner wall of the pressure regulating tube. The adjustable channel includes a plurality of through holes provided on the side wall of the inner regulating tube.

4. The natural gas transmission and pressure regulating device according to claim 1, characterized in that: The control shaft includes a connecting portion, a sleeve portion and a rotating portion. One end of the connecting portion is fixedly connected to the adjustment plate, and the other end passes through the inner adjustment cylinder and is fixedly connected to the sleeve portion. One end of the rotating portion is threaded and sleeved inside the sleeve portion.

5. The natural gas transmission and pressure regulating device according to claim 4, characterized in that: The connection portion is provided with a limiting hole, and a limiting block is fixedly connected to the inner adjustment cylinder.

6. The natural gas transmission and pressure regulating device according to claim 5, characterized in that: An internal thread is provided inside the sleeve portion, and a positioning ring is sleeved on the outer side of the sleeve portion. The positioning ring is fixedly connected to the inner wall of the pressure regulating pipe.

7. The natural gas transmission and pressure regulating device according to claim 6, characterized in that: One end of the rotating part away from the sleeve part extends out of the pressure regulating tube, and a shaft seal is arranged between the rotating part and the pressure regulating tube.

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