CN102705702B - Auxiliary unit used for hydraulic horizontal-pushing pressurizer and hydraulic horizontal-pushing pressurizer - Google Patents

Abstract

The invention discloses an auxiliary unit used for a hydraulic horizontal-pushing pressurizer, which includes a buffering tank arranged on a first oil pipe of an oil return pipeline, and a detecting piece arranged on the buffering tank; the detecting piece can detect that gas enters the buffering tank and send a signal to a control system of the hydraulic horizontal-pushing pressurizer. The invention further discloses the hydraulic horizontal-pushing pressurizer, which includes an oil storage tank, an oil pump connected with the oil storage tank, a first oil pipe connected with an output end of the oil pump, a branch oil pipe arranged on the first oil pipe, and the auxiliary unit provided by the invention; and an end part of the branch oil pipe is introduced into the oil storage tank. The auxiliary unit provided by the invention can avoid natural gas form entering the oil storage tank, thereby improving the safety of the oil storage tank; and in the hydraulic horizontal-pushing pressurizer provided by the invention, the safety of the oil storage tank is high.

Description

Auxiliary part for hydraulic horizontal pushing and boosting device and hydraulic horizontal pushing and boosting device

technical field

The invention relates to the technical field of compressed natural gas refueling substation equipment, and more specifically, relates to an auxiliary part for a hydraulic horizontal pressure booster device and a hydraulic horizontal pressure booster device.

Background technique

Compressed natural gas refueling sub-stations are mainly used to refuel vehicles in cities and provide natural gas energy for township industrial areas. The mother station uses a compressor to pressurize and store natural gas, and then transports the compressed natural gas to the sub-station by a special transport vehicle, and the sub-station refills the gas-consuming device. The substation equipment system of the hydraulic horizontal pushing compressor includes a special eight-tank transport tank car, a hydraulic work skid and a gas vending machine; when working, the hydraulic work skid pushes special hydraulic oil into the gas tank in the transport tank car, and the gas is pushed out through the pressure oil The tank car enters the gas vending machine for refilling.

Referring to Fig. 1 and Fig. 2, a hydraulic pressure boosting device is installed on the working skid, which includes a control system, an oil storage tank 101 and an oil pump 108 connected thereto; Oil pipe; the first oil pipe is provided with a branch oil pipe connected to the top of the oil storage tank 101 and provided with an oil return valve 103, wherein the position of the oil injection valve 107 on the first oil pipe is compared with that of the branch oil pipe on the first oil pipe The position is closer to the oil pump 108; there is hydraulic oil 109 in the oil storage tank 101, and a pressure transmitter 102 is arranged on the upper part; the above-mentioned oil pump 108, oil injection valve 107 and oil return valve 103 are all connected to the control system. During work, referring to Fig. 1, the gas valve 106 and the cut-off valve 104 of the semi-trailer gas cylinder 105 are connected with the control system, and the end of the first oil pipe is connected with the cut-off valve 104 at the end of the semi-trailer gas cylinder 105; Oil injection valve 107, cut-off valve 104 and gas valve 106 are all in open state, make oil return valve 103 be in closed state; The natural gas is compressed and pushed out through the gas valve 106 to add gas to equipment such as gas vending machines or automobiles. Please refer to Fig. 2, after gas filling is completed, the control system is to stop the operation of the oil pump 108, so that the oil filling valve 107 is closed, the oil return valve 103 and the shut-off valve 104 are opened, and the hydraulic oil 109 in the semi-trailer gas cylinder 105 is under the residual pressure of the gas cylinder. Under the influence of the cut-off valve 104, the branch oil pipe returns to the oil storage tank 101; after the backflow is completed, the natural gas in the semi-trailer gas cylinder 105 enters the oil storage tank 101, and the pressure transmitter 102 detects that the air pressure in the oil storage tank 101 has risen, and the control system Close the oil return valve 103 and the shut-off valve 104, and the oil return is completed. During the above oil return process, the hydraulic oil in the cylinder 105 of the semi-trailer flows back to the oil storage tank 101 through part of the first oil pipe and the entire branch oil pipe, and the part of the first oil pipe used for oil return communicates with the branch oil pipe to form an oil return pipeline.

However, when the above-mentioned hydraulic pressure booster device is used, it is difficult to avoid natural gas from flowing back into the oil storage tank, and natural gas is a flammable gas, which brings safety hazards to the oil storage tank.

In addition, part of the natural gas inevitably flows into the storage tank and is eventually discharged into the atmosphere, resulting in waste.

In summary, how to provide an auxiliary part for a hydraulic push booster device and a hydraulic push booster device using the auxiliary part, so as to prevent natural gas from entering the oil storage tank and improve the safety of the oil storage tank is an art in the art problems that need to be resolved urgently.

Contents of the invention

In view of this, the present invention provides an auxiliary part for a hydraulic push booster device to prevent natural gas from entering the oil storage tank and improve the safety of the oil storage tank; the present invention also provides a hydraulic push booster device using the above-mentioned auxiliary parts, which Good security.

To achieve the above object, the present invention provides the following technical solutions:

An auxiliary part for a hydraulic push booster, comprising:

A buffer tank that can be arranged on the first oil pipe of the oil return line of the hydraulic pressure booster device; and

Set on the buffer tank, it can detect the gas entering the buffer tank and transmit the signal to the detection part of the control system of the hydraulic pressure booster device.

Preferably, in the above-mentioned auxiliary parts, the detection part is a liquid level gauge or a pressure gauge.

Preferably, in the above-mentioned auxiliary component, the buffer tank is a buffer tank that can be arranged on the oil return pipeline through its two ends.

A hydraulic pressure booster device comprising an oil storage tank, an oil pump connected to the oil storage tank, a first oil pipe connected to the output end of the oil pump, and a branch oil pipe arranged on the first oil pipe, wherein the The end of the branch oil pipe leads into the oil storage tank; the part used for oil return on the first oil pipe communicates with the branch oil pipe to form an oil return line; it is characterized in that it also includes auxiliary parts, the auxiliary Parts are auxiliary parts described in any one of the above technical solutions.

Preferably, in the above-mentioned hydraulic pressure boosting device, the first oil pipe and the branch oil pipe are respectively one; or there are multiple first oil pipes, and each of the first oil pipes is connected to one The branch oil pipes are different from each other.

Preferably, in the above-mentioned hydraulic pressure booster device, the interface on the buffer tank for connecting with the cut-off valve of the semi-trailer gas cylinder is located at the highest position in the vertical direction.

Preferably, in the above-mentioned hydraulic pressure booster device, the detection part is a liquid level gauge, which is close to the interface connected to the cut-off valve on the buffer tank.

Preferably, the above-mentioned hydraulic pressure boosting device further includes an exhaust pipe with an exhaust valve, which is located at the highest position of the buffer tank along the vertical direction.

The auxiliary parts used in the hydraulic pressure boosting device provided by the present invention include a buffer tank and a detection part arranged on the buffer tank, wherein the buffer tank is a buffer tank that can be arranged on the first oil pipe of the oil return pipeline; the detection part It can detect the gas entering the buffer tank and transmit the signal to the control system of the hydraulic push booster. In application, the buffer tank is set on the first oil pipe of the oil return pipeline. When the hydraulic oil in the semi-trailer gas cylinder returns to oil, it passes through the buffer tank on the oil return line; when the gas enters the buffer tank, the detection part detects the gas Entering the buffer tank, it transmits the information to the control system, and the control system responds accordingly, such as closing the oil return valve, so that the gas in the buffer tank remains in the buffer tank or is discharged to prevent flammable gas from entering the oil storage tank , Improve the safety of the fuel storage tank.

The hydraulic pressure boosting device provided by the present invention comprises an oil storage tank, an oil pump connected to the oil storage tank, a first oil pipe connected to the output end of the oil pump, and a branch oil pipe arranged on the first oil pipe; the end of the branch oil pipe leads into the storage tank. In the oil tank; the part used for oil return on the first oil pipe communicates with the branch oil pipe to form an oil return line; it also includes the auxiliary parts provided by the present invention.

The hydraulic pressure boosting device provided by the present invention applies the auxiliary parts provided by the present invention, which can prevent flammable gas from entering the oil storage tank, and the safety of the oil storage tank is high.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only These are some embodiments of the present invention. Those skilled in the art can also obtain other drawings based on these drawings without creative work.

Fig. 1 is the schematic diagram of the oil injection process of the hydraulic pressure boosting device in the prior art;

Fig. 2 is a schematic diagram of the oil return process of the hydraulic pressure booster device in the prior art;

Fig. 3 is a schematic diagram of the oil injection process of the hydraulic pressure boosting device provided with only one first oil pipe with auxiliary parts provided by the embodiment of the present invention;

Fig. 4 is a schematic structural view of part A in Fig. 3;

Fig. 5 is a schematic diagram of the oil return process of the hydraulic pressure boosting device provided with only one first oil pipe with auxiliary parts provided by the embodiment of the present invention;

Fig. 6 is a schematic structural view of part B in Fig. 5;

Fig. 7 is a schematic diagram of the oil injection process of the hydraulic pressure boosting device provided with two first oil pipes with auxiliary parts provided by the embodiment of the present invention;

Among them, in Fig. 3-Fig. 7:

Oil storage tank 101; branch oil pipe 102; oil return valve 103; cut-off valve 104; semi-trailer cylinder 105; air valve 106; oil filling valve 107; oil pump 108;

Detailed ways

The embodiment of the present invention discloses an auxiliary part used for a hydraulic push booster device to prevent flammable gas from entering the oil storage tank and improve the safety of the oil storage tank; the embodiment of the present invention also discloses an auxiliary part using the above-mentioned auxiliary The hydraulic pressure booster device has good safety.

The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

Please refer to Fig. 3-Fig. 6, the auxiliary parts for the hydraulic pressure booster provided by the embodiment of the present invention include a buffer tank 202 and a detection part, wherein, the buffer tank 202 can be arranged in the oil return of the hydraulic pressure booster On the first oil pipe of the pipeline; the detection part is arranged on the buffer tank 202, which can detect the gas entering the buffer tank 202 and transmit the signal to the control system of the hydraulic pressure booster device.

When using the auxiliary parts provided by this embodiment, the buffer tank 202 is arranged on the first oil pipe, and when the hydraulic oil 109 in the semi-trailer gas cylinder 105 returns to oil, it passes through the buffer tank 202 on the oil return line; when the gas enters the buffer tank In 202, the detection device detects that gas enters the buffer tank 202, and it transmits the information to the control system, and the control system responds accordingly, such as closing the oil return valve 103, etc., so that the gas in the buffer tank 202 remains in the buffer tank 202 or discharged to prevent gas from entering the oil storage tank 101 and improve the safety of the oil storage tank 101.

Specifically, among the auxiliary parts provided in the above embodiments, the detection part is the liquid level gauge 201, which can also be set as a pressure gauge. This embodiment does not limit the detection part, but it must have the function of detecting the gas entering the buffer tank 202 and transmitting the information to the control system.

Specifically, in the auxiliary parts provided in the above embodiments, the buffer tank 202 is a buffer tank that can be arranged on the oil return pipeline through its two ends.

The embodiment of the present invention also discloses a hydraulic pressure booster, which includes an oil storage tank 101, an oil pump 108, a first oil pipe, a branch oil pipe 102 and auxiliary parts; the oil pump 108 is connected to the oil storage tank 101; the first oil pipe is connected to the oil pump 108 connected to the output end, on which an oil injection valve 107 is arranged; a branch oil pipe 102 with an oil return valve 103 is arranged on the first oil pipe, wherein the oil injection valve 107 is closer to the oil pump 108 than the branch oil pipe 102; the end of the above branch oil pipe 102 into the oil storage tank 101; in the hydraulic pressure booster device, the part of the first oil pipe used for oil return communicates with the branch oil pipe 102 to form an oil return line; wherein, the auxiliary parts are the auxiliary parts provided by the above-mentioned embodiments of the invention. Specifically, the auxiliary parts include a buffer tank 202 and a detection part arranged on the buffer tank 202; the buffer tank 202 is arranged on the first oil pipe of the oil return pipeline; the detection part is connected with the control system of the hydraulic pressure booster device.

Specifically, the above-mentioned first oil pipe and branch oil pipe 102 are set to one respectively; the first oil pipe can also be set to multiple, so as to realize continuous operation of multiple semi-trailer gas cylinders 105, and each corresponding first oil pipe has One different branch oil pipe 102 is provided. Each of the above-mentioned branch oil pipes 102 can be set to lead into the oil storage tank 101 through different inlets. Preferably, the ends of the above-mentioned multiple branch oil pipes 102 are merged into one and then lead into the oil storage tank 101 through the same inlet to simplify storage. The structure of the fuel tank 101.

In the hydraulic pressure booster device provided in the above embodiments, the branch oil pipe 102 is located between the oil injection valve 107 and the buffer tank 202 . Please refer to Fig. 3, when the hydraulic pressure boosting device with only one first oil pipe is working, the end of the first oil pipe is connected with the cut-off valve 104 of the semi-trailer gas cylinder 105, and the gas valve 106 of the semi-trailer gas cylinder 105 is cut off. The valves 104 are respectively connected with the control system; the control system opens the oil injection valve 107, the cut-off valve 104 and the air valve 106, closes the oil return valve 103, and makes the oil pump 108 run to push the hydraulic oil 109 through the oil injection valve 107, the buffer tank 202 and the cut-off valve in turn. After the valve 104 enters the inclined semi-trailer gas cylinder 105, and pushes out the gas in the semi-trailer gas cylinder 105; please refer to Fig. 5, after the gas is pushed out, the control system stops the operation of the oil pump 108, and makes the oil injection valve 107 and the gas valve 106 Close and open the oil return valve 103, the hydraulic oil 109 in the gas cylinder 105 of the semi-trailer will fall back under the pressure of the remaining natural gas and its own gravity, and it will flow back to the storage by the branch oil pipe 102 after passing through the buffer tank 202 on the first oil pipe. Fuel tank 101; Finally, the natural gas in the semi-trailer gas cylinder 105 flows into the buffer tank 202, the detection device detects the gas inflow and transmits the information to the control system, and the control system closes the oil return valve 103 on the branch oil pipe 102 to complete the flow to the storage tank. Oil return from tank 101.

In the hydraulic pressure booster device provided in this embodiment, the oil return valve 103 is closed immediately after gas appears in the buffer tank 202 , which can prevent flammable gas from entering the oil storage tank 101 and improve the safety of the oil storage tank 101 .

Preferably, the interface on the buffer tank 202 for connecting with the cut-off valve 104 of the semi-trailer gas cylinder 105 is located at the highest position in the vertical direction. When applying the hydraulic pressure boosting device provided by this embodiment, after the oil return is completed, the control system makes the shut-off valve 104 open, and the hydraulic oil 109 on the inner wall of the semi-trailer gas cylinder 105 flows back to the buffer tank 202, and at the same time, the buffer The combustible gas in the tank 202 flows back into the gas cylinder 105 of the semi-trailer, which avoids the waste of hydraulic oil and combustible gas, and also saves the space in the gas cylinder 105 of the semi-trailer.

In the above-mentioned embodiment, when the interface on the buffer tank 202 that is used to connect with the cut-off valve 104 of the semi-trailer gas cylinder 105 is located at its lower position in the vertical direction, a The exhaust pipe (not shown) of the exhaust valve (not shown in the figure); in application, the above-mentioned exhaust valve is connected with a control system capable of controlling its opening and closing, and when the oil return valve 103 is closed, the control The system opens the above-mentioned exhaust valve, and the combustible gas in the buffer tank 202 rises to the highest position and is discharged by the exhaust valve. When the hydraulic pressure booster is filled again, the control system closes the exhaust valve.

Specifically, in the above embodiment, the detection part is the liquid level gauge 201 , which is close to the interface at the highest position in the vertical direction on the buffer tank 202 , and the interface is used to connect with the cut-off valve 104 . When filling oil into the semitrailer gas cylinder 105, the float of the liquid level gauge 201 is flush with the end of the connecting pipe of the liquid level gauge 201, as shown in Figure 4; after the hydraulic oil 109 in the semitrailer gas cylinder 105 flows back, the gas Entering the buffer tank 202, the above-mentioned float is located on the oil surface, which is lower than the end of the connecting pipe, as shown in FIG. 6 .

In the hydraulic pressure booster device provided by the embodiment of the present invention, when there are multiple first oil pipes, each branch oil pipe 102 is provided with a buffer tank 202 . Please refer to Fig. 7, take 2 first oil pipes as an example below to introduce its working process: first, connect the end of the 1st first oil pipe with the cut-off valve 104 of the 1st semi-trailer gas cylinder 105, connect the 2nd The end of the first oil pipe is connected with the cut-off valve 104 of the second semi-trailer gas cylinder 105; 104 and the air valve 106 of the first semi-trailer gas cylinder 105 are opened, so that the oil return valve 103 on the first branch oil pipe 102, the oil filling valve 107 on the second first oil pipe, and the oil valve on the second branch oil pipe 102 The oil return valve 103, the cut-off valve 104 of the second semi-trailer gas cylinder 105 and the air valve 106 of the second semi-trailer gas cylinder 105 are closed, and at the same time, the oil pump 108 is opened; the hydraulic oil 109 enters from the first oil pipe The first semi-trailer gas cylinder 105 and the gas in the semi-trailer gas cylinder 105 are gradually released; The air valve 106 is closed, and at the same time, the oil filling valve 107 of the second first oil pipe, the cut-off valve 104 and the air valve 106 of the second semi-trailer gas cylinder 105 are opened, and the oil pump 108 is always working during this process; the hydraulic oil 109 is in the oil pump 108 Under the action of the second first oil pipe, it is sent into the second semi-trailer gas cylinder 105 and the gas in the semi-trailer gas cylinder 105 is gradually pushed out. At the same time, the hydraulic oil 109 in the first semi-trailer gas cylinder 105 Carry out oil return, after the oil return is completed, the control system closes the oil return valve 103, and keeps the shut-off valve 104 open, so that the hydraulic oil 109 on the inner wall of the first semi-trailer cylinder 105 flows back into the buffer tank 202; After the gas in the 2nd semi-trailer gas cylinder 105 has been pushed away, carry out the same oil return action as the 1st semi-trailer gas cylinder 105. When there are three or more first oil pipes, the working process is the same as when there are two branch oil pipes 102 .

In the hydraulic pressure boosting device provided by the embodiment of the present invention, the first oil pipe can be set to 2, 3, 4, 5, 6, 7, 8 or more than 8. After the semi-trailer gas cylinder 105 is filled with oil, that is, after the gas is fully released, the latter semi-trailer gas cylinder 105 will immediately carry out the oil filling work, and when the hydraulic pressure booster device with only one first oil pipe is working, the previous semi-trailer gas cylinder 105 will be filled. After the bottle 105 oil filling is completed and the oil return is completed, it can be connected with the last semi-trailer gas cylinder 105 so that the latter semi-trailer gas cylinder 105 starts to fill the oil. The hydraulic pressure booster device provided in this embodiment can improve the efficiency of gas filling for multiple semi-trailer gas cylinders 105 .

Compared with the hydraulic parallel pressure booster device in the prior art, the hydraulic horizontal pressure booster device provided by the embodiment of the present invention can avoid using a pressure transmitter.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the 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 invention. Therefore, the present invention will not 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 (7)

1. An auxiliary part for a hydraulic push pressure booster, characterized in that it comprises: A buffer tank (202) that can be arranged on the first oil pipe of the oil return line of the hydraulic pressure booster device; and Installed on the buffer tank (202), capable of detecting gas entering the buffer tank (202) and transmitting the information that the gas enters the buffer tank (202) to the control system of the hydraulic pressure booster The detection part; the detection part is a liquid level gauge (201). 2. The auxiliary part according to claim 1, characterized in that, the buffer tank (202) is a buffer tank that can be arranged on the oil return pipeline through its two ends. 3. A hydraulic pressure booster, comprising an oil storage tank (101), an oil pump (108) connected to the oil storage tank (101), a first oil pipe connected to the output end of the oil pump (108), setting The branch oil pipe (102) on the first oil pipe, wherein the end of the branch oil pipe (102) leads into the oil storage tank (101); the part used for oil return on the first oil pipe and The branch oil pipes (102) are connected to form an oil return pipeline; the feature is that it also includes an auxiliary part, and the auxiliary part is the auxiliary part described in any one of claims 1-2. 4. The hydraulic pressure boosting device according to claim 3, characterized in that, the first oil pipe and the branch oil pipe (102) are respectively one; or there are multiple first oil pipes, and each Each of the first oil pipes is connected with one branch oil pipe (102) that is different from each other. 5. The hydraulic pressure boosting device according to claim 4, characterized in that, the interface on the buffer tank (202) that is used to connect with the cut-off valve (104) of the semi-trailer gas cylinder (105) is located along its edge the highest position in the vertical direction. 6. The hydraulic pressure boosting device according to claim 5, characterized in that, the detection part is a liquid level gauge (201), which is close to the buffer tank (202) and the shut-off valve (104) The interface to connect to. 7. The hydraulic pressure booster according to claim 4, further comprising an exhaust pipe with an exhaust valve, which is located at the highest position of the buffer tank (202) along the vertical direction.