A high-low pressure conversion natural gas screw compressor

Abstract

The present invention relates to the technical field of compressors, and discloses a high-low pressure conversion natural gas screw compressor, including a gas storage tank. A compression mechanism and a processing pipe are respectively fixedly connected to the upper side and the front side of the gas storage tank. A liquid sensing valve pipe and a gas transmission valve pipe are respectively fixedly connected between the processing pipe, the compression mechanism and the gas storage tank. A heating plate is arranged at the upper end of the processing pipe, and an elastic scraping plug and a rotary scraping plate are respectively arranged in the inner cavities on both sides and at the bottom of the processing pipe. After the processing pipe intercepts hydrates, the present invention opens the water passing tank through a control valve sleeve, and cooperates with the elastic scraping plug and the rotary scraping plate to fully clean the hydrates onto two water control plates in the transfer cavity. And in cooperation with the deflection and closing of the water control plates to drain natural gas, when the liquid level sensor detects the height of the hydrates to the water passing tank, the water passing tank is automatically sealed and the hydrates are discharged, thereby realizing the rapid and full separation of the hydrates in the processing pipe, accelerating the hydrate treatment process, and avoiding the loss of natural gas when discharging the hydrates.

Description

Technical Field

[0001] The present invention relates to the technical field of compressors, and particularly to a high-low pressure conversion natural gas screw compressor. Background Art

[0002] A natural gas screw compressor is a device used for compressing and transporting natural gas, which can operate under different pressure requirements to achieve the conversion of natural gas between high and low pressures. When the natural gas is compressed to a high pressure during the operation of the natural gas screw compressor, its temperature will rise, which is generally not conducive to the formation of hydrates. However, when the natural gas contains a large amount of moisture, and after high-pressure output, the gas cools rapidly or encounters a low-temperature environment, the gas temperature drops to the temperature range for hydrate formation, thus hydrates can be formed. In addition, when high-pressure natural gas is converted to low pressure, if the pressure reduction speed is too fast, it will also cause the gas temperature to drop sharply. If the gas contains sufficient water vapor at this time and the temperature drops to the temperature range for hydrate formation, it is also easy to form natural gas hydrates. These hydrates are likely to cause blockage and pressure buildup in the internal pipelines of the compressor during the natural gas transmission process, ultimately leading to a failure shutdown.

[0003] Patent CN118564458A discloses a natural gas screw compressor, including a gas storage tank mechanism, a screw compression mechanism, and a terminal output mechanism. A hydrate interception middle section assembly is installed between the gas storage tank mechanism and the screw compression mechanism; the hydrates generated at the connection between the gas storage tank mechanism and the screw compression mechanism are intercepted by the hydrate interception middle section assembly, the electromagnetic valve blocks the inner side of the internal resistance interception pipe section, the hydrate output valve is opened to introduce heat into the inner cavity of the internal resistance interception pipe section to dry its inner side, and gas is injected into the inner side of the expansion guide leather cavity synchronously during drying, so that the expansion guide leather cavity expands and then compresses the inner cavity space of the internal resistance interception pipe section. Furthermore, the hydrates intercepted on the inner side of the internal resistance interception pipe section are quickly output to the outside through the hydrate output valve under the push of the outer hydrophobic isolation layer and the introduction of heat in the inner side of the heat exchange gas treatment cavity, avoiding the accumulation of hydrates at the lower part of the intermediate section connecting pipeline and delaying the progress of hydrate elimination.

[0004] In the process of processing hydrates by the natural gas screw compressor in the above patent, when the generation amount of hydrates is large, by suspending the air supply of the screw compressor, the hydrates automatically flow downward along the inner wall of the semi-circular hydrate interception middle section assembly under the action of gravity, and finally converge in the middle section collection part at the bottom. This form of collecting hydrates has a relatively slow speed of collecting hydrates, and due to the adsorption and bonding effect of hydrate droplets on the inner wall of the pipeline, there will still be many tiny droplets left in the area outside the middle section collection part, and the treatment of hydrates is not fast and sufficient; when using the middle section collection part to collect hydrates, the electromagnetic valves on both sides thereof are automatically closed, and the expansion guiding leather cavity at the top expands downward to press out the hydrates through the output valve. Since the inside of the middle section collection part is not completely filled with hydrates when it is closed and contains a large amount of compressed natural gas, the loss of natural gas is likely to occur when the hydrates are pressed out. Summary of the Invention

[0005] The purpose of the present invention is to solve the problems that in the operation process of a general natural gas screw compressor, the treatment process of hydrates is slow, the hydrates are difficult to be quickly and fully separated, and natural gas is likely to be lost when the hydrates are discharged. The present invention provides a high-low pressure conversion natural gas screw compressor.

[0006] The present invention specifically adopts the following technical solutions to achieve the above purpose:

[0007] A high-low pressure conversion natural gas screw compressor includes a gas storage tank. A compression mechanism and a treatment pipe are respectively fixedly connected to the upper side and the front side of the gas storage tank. A liquid sensing valve pipe and a gas transmission valve pipe are respectively fixedly connected between the treatment pipe and the compression mechanism and the gas storage tank. A heating plate is arranged at the upper end of the treatment pipe. Elastic scraping plugs and rotary scraping plates are respectively arranged on both sides and the bottom inner cavity of the treatment pipe.

[0008] A transfer cavity is opened on the lower wall of the treatment pipe. There is a water passing trough between the transfer cavity and the bottom inner cavity of the treatment pipe. A liquid level sensor is arranged on the rear wall of the water passing trough. A discharge pipe is fixedly inserted into the right wall of the transfer cavity. Two opposite swing pipes are rotatably connected at both ends of the transfer cavity. Water control plates are fixedly connected to both swing pipes. An output valve is arranged on the rear water control plate. The lower wall of the treatment pipe is rotatably and sealingly connected with a valve sleeve. Both the rotary scraping plate and the valve sleeve can seal the water passing trough.

[0009] Further, the treatment pipe is composed of vertical pipe sections on both sides and a horizontal straight pipe section at the bottom which are communicated. The elastic scraping plugs are slidably connected with the inner walls of the vertical pipe sections, and the elastic scraping plugs are respectively located above the front side ports of the liquid sensing valve pipe and the gas transmission valve pipe.

[0010] Further, a communicating pipe is fixedly connected between the tops of the two vertical pipe sections. A pressure control pipe is fixedly connected to the left wall of the left vertical pipe section. A vacuum pump is arranged at the bottom of the pressure control pipe. The top ports of the pressure control pipe and both ports of the communicating pipe are located above the elastic scraping plug.

[0011] Further, L-shaped guide rods are fixedly connected to both the left and right sides of the inner cavity of the vertical pipe section. The elastic scraping plug is slidably sleeved between the two L-shaped guide rods. A ring convex for restricting the upward movement of the elastic scraping plug is arranged on the L-shaped guide rod. Arc grooves corresponding to the wall of the horizontal straight pipe section are respectively formed on the elastic scraping plug and the bottom of the L-shaped guide rod. And embedding grooves corresponding to the bottom ends of the L-shaped guide rods are respectively formed on both sides of the bottom of the elastic scraping plug.

[0012] Further, the port of the discharge pipe is located below the two rotary scraping plates and close to the bottom of the transfer cavity.

[0013] Further, a rotating shaft is rotatably connected in the horizontal straight pipe section. The rotary scraping plate is fixedly connected to the rotating shaft. The rotating shaft is driven by a motor installed on the right wall of the processing pipe. The rotary scraping plate is in movable abutment with the inner wall of the horizontal straight pipe section.

[0014] Further, the left end of the rotating shaft passes through the processing pipe and is fixedly connected with a limiting disk. The limiting disk is communicated with the pressure control pipe. A elastic cylinder is slidably inserted at the bottom of the limiting disk. Through grooves are formed on the elastic cylinder and inclined grooves are formed on both sides of the through grooves. A elastic clamping column is slidably clamped at the bottom of the elastic cylinder. A piston pin plate passing through the through groove is slidably inserted on the left side of the limiting disk. A pin column for movably clamping with the inclined groove is arranged on the piston pin plate. A clamping groove corresponding to the pin column is arranged on the left wall of the processing pipe.

[0015] Further, the valve sleeve is located outside the transfer cavity. A guide groove formed by the communication of a straight groove and an arc groove is formed on the front wall of the valve sleeve. A through port corresponding to the water passing groove is formed on the rear side of the valve sleeve. A valve ball for controlling the on-off of the pressure control pipe is fixedly connected to the left end of the valve sleeve. A pin block movably clamped with the guide groove is slidably connected to the front wall of the processing pipe. An electric push rod is fixedly connected between the pin block and the front wall of the processing pipe.

[0016] Further, the water control plate is in movable sealing abutment with the inner wall of the transfer cavity and the outer wall of the corresponding swing pipe. Opposite spiral grooves I are respectively formed in the two swing pipes. A pin rod I movably clamped with the spiral groove I is slidably inserted in the two swing pipes. The pin rod I is slidably clamped with the left wall of the transfer cavity. The right end of the right swing pipe passes through the processing pipe and is fixedly connected with a transmission gear. A crescent plate is fixedly connected to the right wall of the transmission gear.

[0017] A conduit is rotatably connected to the front wall of the processing pipe. The right end of the conduit is fixedly connected to a sector gear. A semi-circular plate that is movably clamped with the crescent plate is fixedly connected to the right wall of the sector gear. A second pin rod fixedly connected to the pin block is slidably inserted into the conduit. A spiral groove II that is movably clamped with the second pin rod is provided on the inner wall of the conduit.

[0018] The beneficial effects of the present invention are as follows:

[0019] After the present invention uses the processing pipe to intercept hydrates, the water passing trough is opened through the control valve sleeve. After controlling the elastic scraping plug to move downward to scrape off the hydrates on both sides of the inner cavity of the processing pipe, the rotating scraping plate is controlled to quickly rotate and scrape the scraped hydrates and the original hydrates at the bottom of the inner cavity of the processing pipe. As a result, the hydrates can be fully thrown into the transfer cavity through the water passing trough, realizing the rapid and full separation of the hydrates in the processing pipe and accelerating the hydrate treatment process.

[0020] After the hydrates thrown into the transfer cavity fall on the two water control plates, the present invention cooperates to control the two water control plates to deflect and close, thereby compressing the hydrate storage space and driving the hydrates to continuously rise. When the liquid level sensor detects the hydrates, the natural gas in the transfer cavity is relatively emptied into the inner cavity of the processing pipe. Cooperating to control the rotating scraping plate to stop and seal the water passing trough again, and the output valve is opened. When the two water control plates close, only the hydrates are pressed out, thus avoiding the loss of natural gas when discharging the hydrates. Description of the Drawings

[0021] Figure 1 is the three-dimensional structure diagram of the compressor of the present invention;

[0022] Figure 2 is the three-dimensional partial section of the processing pipe of the compressor of the present invention Figure 1 ;

[0023] Figure 3 is the three-dimensional partial section of the processing pipe of the compressor of the present invention Figure 2 ;

[0024] Figure 4 is the three-dimensional partial section of the processing pipe of the compressor of the present invention Figure 3 ;

[0025] Figure 5 is the exploded view of the valve sleeve and the processing pipe part of the compressor of the present invention;

[0026] Figure 6 is the exploded view of the water control plate part of the compressor of the present invention;

[0027] Figure 7 is the exploded view of the first pin rod and the swing pipe part of the compressor of the present invention;

[0028] Figure 8 is the three-dimensional sectional view of the limiting disc and the valve sleeve part of the compressor of the present invention;

[0029] Figure 9 is a three-dimensional sectional view of the limit disc part of the compressor of the present invention;

[0030] Figure 10 is an exploded view of the second pin rod and the conduit part of the compressor of the present invention.

[0031] Reference numerals: 1, gas storage tank; 11, gas transmission valve pipe; 2, compression mechanism; 21, liquid sensing valve pipe; 3, treatment pipe; 31, heating plate; 32, L-shaped guide rod; 33, elastic scraping plug; 34, connecting pipe; 35, water overflow tank; 36, liquid level sensor; 37, discharge pipe; 4, rotating shaft; 41, rotating scraping plate; 42, limit disc; 43, elastic cylinder; 44, inclined groove; 45, elastic clamping column; 46, piston pin plate; 47, pin column; 5, swing pipe; 51, water control plate; 52, output valve; 53, first pin rod; 54, transmission gear; 55, crescent plate; 6, valve sleeve; 61, guide groove; 62, through port; 63, valve ball; 7, pressure control pipe; 71, vacuum pump; 8, conduit; 81, missing gear; 82, semi-circular plate; 83, second pin rod; 84, pin block; 85, electric push rod. Specific embodiments

[0032] To make the objectives, technical solutions, and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0033] In the first embodiment, as Figures 1 - 10 shown, a high-low pressure conversion natural gas screw compressor includes a gas storage tank 1. A compression mechanism 2 and a treatment pipe 3 are respectively fixedly connected to the upper side and the front side of the gas storage tank 1. A liquid sensing valve pipe 21 and a gas transmission valve pipe 11 are respectively fixedly connected between the treatment pipe 3 and the compression mechanism 2 and the gas storage tank 1. A heating plate 31 is arranged at the upper end of the treatment pipe 3. Elastic scraping plugs 33 and rotating scraping plates 41 are respectively arranged on both sides and the bottom inner cavity of the treatment pipe 3;

[0034] A transfer cavity is formed in the lower wall of the treatment pipe 3. There is a water overflow tank 35 between the transfer cavity and the bottom inner cavity of the treatment pipe 3. A liquid level sensor 36 is arranged on the rear wall of the water overflow tank 35. A discharge pipe 37 is fixedly inserted into the right wall of the transfer cavity. Two relatively connected swing pipes 5 are rotatably connected to both ends of the transfer cavity. Water control plates 51 are fixedly connected to both swing pipes 5. An output valve 52 is arranged on the rear water control plate 51. A valve sleeve 6 is rotatably and sealingly connected to the lower wall of the treatment pipe 3. Both the rotating scraping plate 41 and the valve sleeve 6 can seal the water overflow tank 35.

[0035] The treatment pipe 3 is formed by connecting vertical pipe sections on both sides and a horizontal straight pipe section at the bottom. The elastic scraping plug 33 is slidably connected to the inner wall of the vertical pipe section, and the elastic scraping plug 33 is respectively located above the front side ports of the liquid sensing valve pipe 21 and the gas transmission valve pipe 11.

[0036] During use, the compression mechanism 2 compresses natural gas and transports it to the storage tank 1 through the liquid sensing valve pipe 21, the processing pipe 3, and the gas transmission valve pipe 11. During this period, the processing pipe 3 intercepts hydrates, and the heating plate 31 heats and evaporates the hydrates in the processing pipe 3. When the liquid sensing valve pipe 21 detects the generation of hydrates at the output end of the compression mechanism 2 and the duration exceeds the standard, the liquid sensing valve pipe 21 and the gas transmission valve pipe 11 are automatically closed respectively. The elastic scraping plugs 33 on both sides automatically move down to the bottom of the vertical pipe section of the processing pipe 3 respectively, scraping off the hydrates on the inner wall of the vertical pipe section. Synchronously, the matching valve sleeve 6 opens the water overflow tank 35, and the rotary scraping plate 41 quickly rotates and scrapes the scraped hydrates and the original hydrates in the bottom horizontal pipe section of the processing pipe 3, so as to fully throw the hydrates into the transfer cavity through the water overflow tank 35, realizing the rapid and complete separation of the hydrates in the processing pipe 3, accelerating the hydrate treatment process. After the hydrates thrown into the transfer cavity fall on the two water control plates 51, they cooperate to control the deflection and closing of the two water control plates 51, thereby compressing the hydrate storage space and driving the hydrates to continuously rise. During this period, when the liquid level sensor 36 in the water overflow tank 35 stably detects the rising hydrates, the natural gas between the two water control plates 51 in the transfer cavity is relatively emptied into the inner cavity of the processing pipe 3. At that time, cooperate to control the rotary scraping plate 41 to stop and seal the water overflow tank 35 again, and control the output valve 52 to open. Controlling the two water control plates 51 to continue closing can only press out the hydrates, thus avoiding the loss of natural gas when discharging the hydrates.

[0037] Embodiment 2: On the basis of the above embodiment, a connecting pipe 34 is fixedly connected between the tops of the vertical pipe sections on both sides. The left wall of the left vertical pipe section is fixedly connected with a pressure control pipe 7. A vacuum pump 71 is arranged at the bottom of the pressure control pipe 7. The top ports of the pressure control pipe 7 and the two ports of the connecting pipe 34 are both above the elastic scraping plugs 33.

[0038] When using the vacuum pump to quickly inflate and pressurize, the connecting pipe 34 can be used to quickly control the elastic scraping plugs 33 on both sides to move down simultaneously to scrape off the hydrates on the inner wall of the vertical pipe section. When using the vacuum pump to quickly exhaust and relieve pressure, the connecting pipe 34 can be used to quickly control the elastic scraping plugs 33 on both sides to move up and reset simultaneously.

[0039] Furthermore, L-shaped guide rods 32 are fixedly connected to both the left and right sides of the inner cavity of the vertical pipe section. The elastic scraping plugs 33 are slidably sleeved between the two L-shaped guide rods 32. Ring protrusions for restricting the upward movement of the elastic scraping plugs 33 are arranged on the L-shaped guide rods 32. Arc grooves corresponding to the cavity wall of the horizontal pipe section are respectively formed on the elastic scraping plugs 33 and the bottoms of the L-shaped guide rods 32, and embedding grooves corresponding to the bottoms of the L-shaped guide rods 32 are respectively formed on both sides of the bottom of the elastic scraping plugs 33.

[0040] When the compression mechanism 2 operates normally, the annular protrusion on the L-shaped guide rod 32 is utilized to prevent the elastic scraping plug 33 from being over-compressed by the air pressure when transporting pressurized natural gas. By using the slots on both sides of the bottom of the elastic scraping plug 33 corresponding to the bottom end of the L-shaped guide rod 32, when cleaning the hydrate, the elastic scraping plug 33 can move down the maximum distance, and after being clamped to the bottom end of the L-shaped guide rod 32 by the slots, the arc slot at the bottom of the elastic scraping plug 33 is just aligned with the top cavity wall of the horizontal straight pipe section, facilitating the subsequent rotation scraping by the rotating scraping plate 41 to simultaneously clean the elastic scraping plug 33 and the lower wall of the L-shaped guide rod 32, so as to fully scrape the hydrate in the horizontal straight pipe section.

[0041] Embodiment 3, based on the above embodiment, the port of the discharge pipe 37 is located below the two rotating scraping plates 41 and close to the bottom of the transfer cavity.

[0042] With this design, when the output valve 52 is opened, the two water control plates 51 close automatically to press the hydrate out through the output valve 52 to the bottom of the transfer cavity, and then discharge it through the discharge pipe 37.

[0043] Embodiment 4, based on the above embodiment, a rotating shaft 4 is rotatably connected in the horizontal straight pipe section, the rotating scraping plate 41 is fixedly connected to the rotating shaft 4, the rotating shaft 4 is driven by a motor installed on the right wall of the processing pipe 3, and the rotating scraping plate 41 is in movable contact with the inner wall of the horizontal straight pipe section.

[0044] Driving the rotating shaft 4 by the motor to make the rotating scraping plate 41 rotate while contacting the inner wall of the horizontal straight pipe section can scrape off the hydrate adsorbed and adhered to the inner wall of the horizontal straight pipe section. At the same time, under the action of centrifugal force, the hydrate at the bottom of the horizontal straight pipe section is pushed out through the opened water passing groove 35, cleaning the hydrate quickly and fully.

[0045] The left end of the rotating shaft 4 passes through the processing pipe 3 and is fixedly connected with a limiting disk 42. The limiting disk 42 is communicated with the pressure control pipe 7. A elastic cylinder 43 is slidably inserted at the bottom of the limiting disk 42. Through grooves are formed on the elastic cylinder 43, and inclined grooves 44 are formed on both sides of the through grooves. A elastic clamping column 45 is slidably clamped at the bottom of the elastic cylinder 43. A piston pin plate 46 passing through the through groove is slidably inserted on the left side of the limiting disk 42. A pin column 47 is arranged on the piston pin plate 46 and is in movable clamping connection with the inclined groove 44. A clamping groove corresponding to the pin column 47 is arranged on the left wall of the processing pipe 3.

[0046] When the compression mechanism 2 operates normally, the elastic clamping column 45 is movably clamped in the clamping groove on the left wall of the processing pipe 3, the limiting disk 42 is restricted from deflecting, the rotating shaft 4 cannot drive the rotating scraping plate 41 to rotate, and the rotating scraping plate 41 stably seals the water passing groove 35. Since the valve sleeve 6 also seals the water passing groove 35, leakage is avoided during the normal compression and transportation of natural gas under the dual sealing effect;

[0047] When cleaning the hydrate, the vacuum pump 71 quickly fills the pressure control pipe 7 with air, and the air pressure also acts on the piston pin plate 46, causing the pin column 47 to squeeze the inclined groove 44. The inclined groove 44 drives the elastic cylinder 43 to move the elastic clamping column 45 upward to disengage from the card slot. Subsequently, the motor automatically operates to drive the rotating shaft 4 to rotate the rotary scraping plate 41. After the cleaning is completed, the vacuum pump 71 releases pressure, causing the piston pin plate 46 to reset under the elastic force of the elastic cylinder 43, and the elastic clamping column 45 also resets. However, when not engaged in the card slot, the elastic clamping column 45 is compressed. Subsequently, when the motor drives the rotating shaft 4 to gradually stop the rotation of the rotary scraping plate 41, the elastic clamping column 45 can automatically engage in the card slot, thereby restricting the rotation of the rotary scraping plate 41 to maintain a stable seal of the water passing groove 35.

[0048] Embodiment Five: On the basis of the above embodiment, the valve sleeve 6 is located outside the transfer cavity. The front wall of the valve sleeve 6 is provided with a guide groove 61 formed by the connection of a straight groove and an arc groove. The rear side of the valve sleeve 6 is provided with a through port 62 corresponding to the water passing groove 35. The left end of the valve sleeve 6 is fixedly connected with a valve ball 63 for controlling the on-off of the pressure control pipe 7. The front wall of the processing pipe 3 is slidably connected with a pin block 84 that is movably clamped with the guide groove 61. A power-assisted push rod 85 is fixedly connected between the pin block 84 and the front wall of the processing pipe 3.

[0049] When the liquid sensing valve pipe 21 detects that hydrate is generated at the output end of the compression mechanism 2 and the duration exceeds the standard, the liquid sensing valve pipe 21 and the gas transmission valve pipe 11 are automatically closed respectively. Synchronously, the power-assisted push rod 85 automatically contracts at a low speed and drives the pin block 84 to move leftward. The pin block 84 squeezes the arc groove in the guide groove 61. When the pin block 84 is clamped from the arc groove to the straight groove, the valve sleeve 6 is driven to deflect, causing the through port 62 to be completely docked with the water passing groove 35, thereby facilitating the subsequent transfer of the hydrate to the transfer cavity. While the valve sleeve 6 is deflecting, the valve sleeve 6 drives the valve ball 63 to deflect and connect the pressure control pipe 7 communicating with the vacuum pump 71, so that the operation of the vacuum pump 71 can be integrally and synchronously controlled to quickly inflate and adjust the downward movement of the elastic scraping plugs 33 on both sides, and synchronously control the limit disc 42 to release the limit, causing the rotary scraping plate 41 to operate.

[0050] Embodiment Six: On the basis of the above embodiment, the water control plate 51 is movably and sealingly abutted against the inner wall of the transfer cavity and the outer wall of the corresponding swing pipe 5. Opposite spiral grooves one are respectively formed in the two swing pipes 5. A pin rod one 53 that is movably clamped with the spiral groove one is slidably inserted into the two swing pipes 5. The pin rod one 53 is slidably clamped with the left wall of the transfer cavity. The right end of the right swing pipe 5 passes through the processing pipe 3 and is fixedly connected with a transmission gear 54. A crescent plate 55 is fixedly connected to the right wall of the transmission gear 54;

[0051] A conduit 8 is rotatably connected to the front wall of the processing pipe 3. The right end of the conduit 8 is fixedly connected to a sector gear 81. A semi-circular plate 82 that is movably clamped to the crescent plate 55 is fixedly connected to the right wall of the sector gear 81. A second pin rod 83 fixedly connected to a pin block 84 is slidably inserted into the conduit 8. A second spiral groove that is movably clamped to the second pin rod 83 is provided on the inner wall of the conduit 8.

[0052] When the compression mechanism 2 operates normally, the semi-circular plate 82 limits the crescent plate 55, and thus the transmission gear 54 restricts the rotation of the right swing pipe 5. Correspondingly, the right swing pipe 5 restricts the rotation of the left swing pipe 5 through the first pin rod 53, and the two water control plates 51 are relatively stable.

[0053] When the electric push rod 85 automatically contracts at a low speed and drives the pin block 84 to continue moving leftward, such that the pin block 84 is clamped from the arc groove to the straight groove, synchronously, the pin block 84 pulls the second pin rod 83 to drive the conduit 8 to deflect. Thus, the sector gear 81 drives the semi-circular plate 82 to deflect downward and backward until the semi-circular plate 82 is about to release the clamping limit on the crescent plate 55 and the sector gear 81 is about to mesh with the transmission gear 54. During this period, as the hydrate continuously fills the transfer cavity and falls onto the water control plates 51, the water control plates 51 still maintain the lowest position same as the initial state to avoid premature closing that may cause incomplete collection of the hydrate, and at the same time, it can provide sufficient cleaning time for the elastic scraping plug 33 and the rotary scraping plate 41 to clean the hydrate onto the water control plates 51.

[0054] Subsequently, as the electric push rod 85 continues to contract, the pin block 84 moves along the straight groove, the valve sleeve 6 remains stationary, and the through port 62 is stably docked with the water passing groove 35, facilitating the output and transfer of the hydrate. The semi-circular plate 82 releases the clamping limit on the crescent plate 55, and the sector gear 81 just meshes to drive the transmission gear 54 to deflect downward and forward, thereby driving the two water control plates 51 to deflect and close. When the hydrate storage space is compressed and the liquid level sensor 36 detects the rising hydrate, the height of the hydrate reaches the water passing groove 35, and the natural gas between the two water control plates 51 in the transfer cavity is relatively emptied into the inner cavity of the processing pipe 3. The liquid level sensor 36 feeds back to control the vacuum pump 71 to relieve pressure. The elastic scraping plugs 33 on both sides automatically reset under the action of their own elastic forces. The elastic clamping posts 45 in the limit disk 42 also reset and automatically extend into the card slots when turning to the card slot connection position, thereby limiting the rotary scraping plate 41. Correspondingly, the motor drives the rotating shaft 4 to stop rotating, and the rotary scraping plate 41 stops again on the water passing groove 35 to seal the water passing groove 35. Correspondingly, the output valve 52 automatically opens. As the electric push rod 85 continues to contract, the two water control plates 51 are driven to close to press out the hydrate, thus avoiding the loss of natural gas when discharging the hydrate.

[0055] The foregoing description of the disclosed embodiments enables those skilled in the art to practice or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A high-low pressure conversion natural gas screw compressor, comprising a gas storage tank (1), characterized in that: The upper side and the front side of the gas storage tank (1) are respectively fixedly connected with a compression mechanism (2) and a processing tube (3); the processing tube (3) and the compression mechanism (2) and the gas storage tank (1) are respectively fixedly connected with a liquid sensing valve tube (21) and a gas delivery valve tube (11); a heating plate (31) is arranged at the upper end of the processing tube (3); elastic scraping plugs (33) and a rotary scraping plate (41) are respectively arranged at the two sides and the inner cavity at the bottom of the processing tube (3); the processing tube (3) is composed of vertical tube sections at the two sides connected with a horizontal tube section at the bottom; the elastic scraping plug (33) is slidably connected with the inner wall of the vertical tube section, and the elastic scraping plug (33) is respectively located at the upper side of the front side ports of the liquid sensing valve tube (21) and the gas delivery valve tube (11); A rotating shaft (4) is rotatably connected in the horizontal and vertical pipe section, and the rotary scraper (41) is fixedly connected to the rotating shaft (4). The rotating shaft (4) is driven by a motor installed on the right wall of the processing pipe (3), and the rotary scraper (41) is movably abutted against the inner wall of the horizontal and vertical pipe section; A transfer chamber is provided on the lower wall of the treatment tube (3), a water trough (35) is provided between the transfer chamber and the inner cavity at the bottom of the treatment tube (3), a liquid level sensor (36) is provided on the rear wall of the water trough (35), a discharge pipe (37) is fixedly plugged into the right wall of the transfer chamber, two oppositely connected swing pipes (5) are rotatably connected at both ends of the transfer chamber, a water control plate (51) is fixedly connected to the two swing pipes (5), an output valve (52) is provided on the rear side of the water control plate (51), a valve sleeve (6) is rotatably sealed to the lower wall of the treatment tube (3), and the rotary scraper plate (41) and the valve sleeve (6) are both capable of sealing the water trough (35).

2. A high-low pressure conversion natural gas screw compressor according to claim 1, characterized in that: A connecting pipe (34) is fixedly connected between the tops of the vertical pipe sections on both sides, a pressure control pipe (7) is fixedly connected to the left wall of the left vertical pipe section, a vacuum pump (71) is arranged at the bottom of the pressure control pipe (7), and the top port of the pressure control pipe (7) and the ports on both sides of the connecting pipe (34) are both located on the upper side of the elastic scraper plug (33).

3. A high-low pressure conversion natural gas screw compressor according to claim 2, characterized in that: L-shaped guide rods (32) are fixedly connected to the left and right sides of the inner cavity of the vertical pipe section, and the elastic scraper plug (33) is slidably sleeved between the two L-shaped guide rods (32). The L-shaped guide rod (32) is provided with an annular protrusion for limiting the upward movement of the elastic scraper plug (33). The bottom of the elastic scraper plug (33) and the L-shaped guide rod (32) are respectively provided with arc grooves corresponding to the cavity wall of the horizontal straight pipe section, and the bottom of the elastic scraper plug (33) is respectively provided with embedded grooves corresponding to the bottom end of the L-shaped guide rod (32).

4. The high-low pressure conversion natural gas screw compressor according to claim 3, characterized in that: The discharge pipe (37) port is located below the two rotary scrapers (41) and close to the bottom of the transfer chamber.

5. The high-low pressure conversion natural gas screw compressor according to claim 4, characterized in that: The left end of the rotating shaft (4) passes through the processing tube (3) and is fixedly connected to a limit plate (42). The limit plate (42) is communicated with the pressure control tube (7). An elastic cylinder (43) is slidably inserted at the bottom of the limit plate (42). A through groove is provided on the elastic cylinder (43) and inclined grooves (44) are provided on both sides of the through groove. An elastic clamping column (45) is slidably engaged at the bottom of the elastic cylinder (43). A piston pin plate (46) passing through the through groove is slidably engaged on the left side of the limit plate (42). A pin column (47) movably engaged with the inclined groove (44) is provided on the piston pin plate (46). A clamping groove corresponding to the pin column (47) is provided on the left wall of the processing tube (3).

6. The high-low pressure conversion natural gas screw compressor according to claim 5, characterized in that: The valve sleeve (6) is located at the periphery of the transfer chamber. A guide groove (61) formed by connecting a straight groove and an arc groove is provided on the front wall of the valve sleeve (6). A through hole (62) corresponding to the water channel (35) is provided on the rear side of the valve sleeve (6). A valve ball (63) for controlling the on and off of the pressure control tube (7) is fixedly connected to the left end of the valve sleeve (6). A pin block (84) movably engaged with the guide groove (61) is slidably connected to the front wall of the processing tube (3). An electric push rod (85) is fixedly connected between the pin block (84) and the front wall of the processing tube (3).

7. The high-low pressure conversion natural gas screw compressor according to claim 6, characterized in that: The water control plate (51) is in active sealing contact with the inner wall of the transfer chamber and the outer wall of the corresponding swing tube (5); opposite spiral grooves (1) are respectively provided in the two swing tubes (5); a pin rod (53) is slidably inserted in the two swing tubes (5) and movably engaged with the spiral grooves (1); the pin rod (53) is slidably engaged with the left wall of the transfer chamber; the right end of the right swing tube (5) passes through the processing tube (3) and is fixedly connected with a transmission gear (54); the right wall of the transmission gear (54) is fixedly connected with a crescent plate (55); The front wall of the processing tube (3) is rotatably connected to a conduit (8), the right end of the conduit (8) is fixedly connected to a missing gear (81), the right wall of the missing gear (81) is fixedly connected to a semicircular plate (82) movably engaged with the crescent plate (55), a second pin rod (83) fixedly connected to the pin block (84) is slidably inserted in the conduit (8), and a second spiral groove movably engaged with the second pin rod (83) is provided on the inner wall of the conduit (8).

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