Oiling machine waterproof hammer assembly and pipeline system

Abstract

The utility model provides a waterproof hammer assembly of an oiling machine and a pipeline system. The utility model belongs to the technical field of water hammer prevention, and discloses a water hammer prevention assembly which comprises an overflow valve, the overflow valve comprises a valve body, a first port and a second port, the first port and the second port communicate with the valve body, and a first blocking piece is arranged in the valve body in a reciprocating motion mode so as to block the first port or the second port according to external pressure; the energy accumulator is communicated with the first port and the second port to store oil overflowing from the valve body under pressure conversion, and residual oil in a pipeline can be conveyed into the energy accumulator through combination of the overflow valve and the energy accumulator when the pressure in the pipeline is suddenly changed due to the fact that the oil gun stops refueling, so that the pressure in the pipeline is released; meanwhile, the oil liquid in the part is temporarily stored, so that waste of the oil liquid in the part is avoided, and the oil quantity can be accurately calculated.

Description

Technical Field

[0001] The present disclosure relates to the technical field of water hammer prevention, and particularly to a water hammer prevention assembly and pipeline system for a fuel dispenser. Background Art

[0002] The water hammer effect refers to that in a pipeline, when a valve is suddenly opened or closed, the water flow will generate an instantaneous pressure on the pipe wall. Due to the smooth pipe wall, the subsequent water flow, under the action of inertia, quickly reaches the maximum and causes a destructive effect. On the contrary, when a closed valve is suddenly opened, a water hammer, called a negative water hammer, will also be generated, which also has a certain destructive force. The water hammer effect will also occur in the pipeline system of a fuel dispenser. Therefore, it is necessary to eliminate the influence of this effect on the pipeline to facilitate the long-term use of the pipeline.

[0003] Currently, the existing water hammer elimination system in the pipeline system of a fuel dispenser reduces the influence brought by the water hammer effect by changing the control valve structure of the fuel nozzle and prolonging the closing time of the control valve when the fuel nozzle jumps, that is, closing slowly. Its disadvantage is that it cannot quickly and completely cut off the oil circuit, so it cannot accurately control the fueling volume. Although the fuel nozzle jumps when the oil submerges the Venturi nozzle of the fuel nozzle, there is still a small amount of oil flowing out, resulting in unnecessary losses and unable to accurately calculate the fuel volume. If the control valve is closed immediately, although no excess oil will be generated, the instantaneous pressure during closing will cause great pressure on the pipeline and affect the service life of the pipeline. Therefore, a water hammer prevention assembly and pipeline system for a fuel dispenser are needed. Summary of the Utility Model

[0004] One technical problem to be solved by the present disclosure is that the existing fuel dispensers cannot take into account the protection of the pipeline and the accurate control of the fueling volume.

[0005] To solve the above technical problem, an embodiment of the present disclosure provides a water hammer prevention assembly for a fuel dispenser, which includes:

[0006] A relief valve, which includes a valve body, a first port and a second port. The first port and the second port are communicated with the valve body. A first stopper is reciprocally movably arranged inside the valve body to block the first port or the second port according to the external pressure.

[0007] An accumulator, which is communicated with the first port and the second port to store the oil overflowing from the valve body under the pressure change.

[0008] In some embodiments, for the aforementioned water hammer prevention assembly for a fuel dispenser, the first stopper includes a first valve core and an adjusting assembly; the first valve core is movably arranged between the first port and the second port, and the adjusting assembly abuts against one end of the first valve core to limit the movement range of the first valve core.

[0009] In some embodiments, the aforementioned fuel dispenser anti-water hammer assembly, wherein the adjustment assembly includes a sealing cover, an adjusting handwheel, a pressing rod, and an adjusting spring; the adjusting spring and the pressing rod are located inside the valve body, one end of the adjusting spring is in contact with the first valve core, and the other end of the adjusting spring is in contact with the pressing rod, and the side of the pressing rod away from the adjusting spring passes through the valve body and is connected to the adjusting handwheel, the sealing cover is located outside the valve body, and the adjusting handwheel is threadedly connected to the sealing cover to push the pressing rod to move and adjust the telescopic range of the adjusting spring.

[0010] In some embodiments, in the aforementioned fuel dispenser anti-water hammer assembly, the first port and the second port are spaced apart along a first direction; wherein the first direction is the flow direction of the oil.

[0011] In some embodiments, the aforementioned fuel dispenser anti-water hammer assembly has a piston disposed inside the accumulator, and the piston is movable inside the accumulator according to pressure changes to collect or discharge oil.

[0012] In some embodiments, in the aforementioned fuel dispenser anti-water hammer assembly, a pressure regulating valve is provided on the top of the accumulator to control the pressure inside the accumulator.

[0013] In some embodiments, the aforementioned fuel dispenser anti-water hammer assembly further includes a one-way valve; the one-way valve is connected to the valve body, and the one-way valve is arranged relative to the first port and the second port to prevent oil from entering the accumulator when the external fuel dispenser is not working.

[0014] In some embodiments, in the aforementioned fuel dispenser anti-water hammer assembly, the position of the one-way valve corresponds to the position of the second port; wherein when the first stopper blocks the first port, the one-way valve is connected to the second port.

[0015] In some embodiments, in the aforementioned fuel dispenser anti-water hammer assembly, a spring valve core is provided inside the one-way valve to block or release the control oil according to changes in pressure.

[0016] A second aspect of the present application provides a fuel dispenser waterproof pipeline system, which includes at least one fuel dispenser waterproof hammer assembly; and also includes a fueling gun, a flow meter and a combination pump; wherein the fueling gun, the flow meter and the combination pump are connected in sequence, the other end of the combination pump is connected to an external oil tank, and the fuel dispenser waterproof hammer assembly is located between the flow meter and the combination pump.

[0017] Through the above technical solution, a fuel dispenser water hammer prevention assembly provided by the present disclosure, through the combination of an overflow valve and an accumulator, when the pressure in the pipeline suddenly changes due to the stop of fueling at the fuel gun, the pressure will push the first stopper in the overflow valve, causing the first port in the valve body to open. Therefore, the residual oil in the pipeline will be transported to the accumulator, releasing the pressure in the pipeline, and at the same time, this part of the oil is temporarily stored. During the next fueling, this part of the oil will be discharged from the second port for reuse, avoiding the waste of this part of the oil, and at the same time, the fuel volume can be accurately calculated. Therefore, the overflow valve and the accumulator can greatly extend the service life of the pipeline, and no waste of excess oil will occur when the control valve is closed.

[0018] Further, a first stopper can be arranged in the overflow valve. The first stopper is movably arranged in the valve body. Then, when the pressure in the pipeline changes, the first stopper can move in the overflow valve and move to the position of the first port or the second port as the pressure changes, adjusting the pressure balance in the pipeline and temporarily storing the oil to prevent oil leakage.

[0019] In summary, through the above technical solution, the present invention can achieve the extension of the service life of the pipeline and avoid oil leakage, well solving the technical problems existing in the prior art and being conducive to industrial application. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present disclosure. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0021] Figure 1 It is a schematic cross-sectional structure diagram of the overflow valve of the fuel dispenser water hammer prevention assembly disclosed in the embodiment of the present disclosure;

[0022] Figure 2 It is a schematic cross-sectional structure diagram of the accumulator of the fuel dispenser water hammer prevention assembly disclosed in the embodiment of the present disclosure;

[0023] Figure 3 It is a schematic overall structure diagram of the fuel dispenser water hammer prevention assembly disclosed in the embodiment of the present disclosure;

[0024] Figure 4 It is a schematic connection structure diagram of the fuel dispenser water hammer prevention pipeline assembly disclosed in the embodiment of the present disclosure.

[0025] Description of the reference numerals:

[0026] 1. Overflow valve; 101. Valve body; 102. First port; 103. Second port; 2. First stop member; 201. First spool; 2021. Sealing cover; 2022. Adjusting handwheel; 2023. Pressing rod; 2024. Adjusting spring; 202. Adjusting assembly; 3. Accumulator; 4. Piston; 5. Pressure regulating valve; 6. Check valve; 7. Spring spool; 8. Fuel gun; 9. Flowmeter; 10. Combined pump; 11. Air chamber; 12. Oil chamber; a. First direction. Detailed implementation manners

[0027] The following further describes in detail the implementation manners of the present disclosure in conjunction with the accompanying drawings and embodiments. The detailed descriptions and drawings of the following embodiments are used to exemplarily illustrate the principles of the present disclosure, but cannot be used to limit the scope of the present disclosure. The present disclosure can be implemented in many different forms, not limited to the specific embodiments disclosed herein, but including all technical solutions falling within the scope of the claims.

[0028] These embodiments are provided by the present disclosure to make the present disclosure thorough and complete, and to fully convey the scope of the present disclosure to those skilled in the art. It should be noted that: unless otherwise specifically stated, the relative arrangements of components and steps, the components of materials, numerical expressions and values set forth in these embodiments should be construed as merely exemplary, rather than as limitations.

[0029] It should be noted that in the description of the present disclosure, unless otherwise specified, the meaning of "a plurality" is greater than or equal to two; the orientation or positional relationships indicated by the terms "upper", "lower", "left", "right", "inner", "outer", etc. are only for the convenience of describing the present disclosure and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus cannot be construed as a limitation of the present disclosure. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0030] In addition, the "first", "second" and similar terms used in the present disclosure do not denote any order, quantity or importance, but are only used to distinguish different parts. "Vertical" is not strictly vertical, but within the allowable error range. "Parallel" is not strictly parallel, but within the allowable error range. The terms "including" or "comprising" and the like mean that the elements before this word are covered by the elements listed after this word, and do not exclude the possibility of also covering other elements.

[0031] It should also be noted that in the description of the present disclosure, unless otherwise clearly specified and limited, the terms "installation", "connection", and "coupling" should be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or an integral connection; it may be a direct connection, or an indirect connection through an intermediate medium. For those of ordinary skill in the art, the specific meanings of the above terms in the present disclosure can be understood according to specific circumstances. When it is described that a specific device is located between a first device and a second device, an intermediate device may or may not exist between the specific device and the first device or the second device.

[0032] All terms used in the present disclosure have the same meanings as those understood by those of ordinary skill in the art to which the present disclosure pertains, unless otherwise specifically defined. It should also be understood that terms defined in a general dictionary, such as those, should be interpreted as having meanings consistent with their meanings in the context of the relevant art, and should not be interpreted in an idealized or overly formal sense, unless specifically defined as such here.

[0033] Technologies, methods, and devices known to those of ordinary skill in the relevant fields may not be discussed in detail, but where appropriate, the technologies, methods, and devices should be regarded as part of the specification.

[0034] Embodiment 1

[0035] Refer to the attached Figures 1-3 , this embodiment discloses a fuel dispenser water hammer prevention assembly, which includes: a relief valve 1, the relief valve 1 includes a valve body 101, a first port 102, and a second port 103. The first port 102 and the second port 103 communicate with the valve body 101. A first stopper 2 is movably arranged inside the valve body 101 to block the first port 102 or the second port 103 according to the external pressure; an accumulator 3, the accumulator 3 communicates with the first port 102 and the second port 103 to store the oil overflowing from the valve body 101 under pressure changes.

[0036] Specifically, in order to solve the problem that the existing fuel dispensers cannot balance the protection of pipelines and the accurate control of the fueling volume, the fuel dispenser water hammer prevention assembly provided in this embodiment enables the first stopper 2 in the relief valve 1 to move according to the magnitude of the pressure in the pipeline, so that the first port 102 or the second port 103 communicates with the pipeline, realizing the balance of the pipeline pressure. At the same time, when the first port 102 communicates with the pipeline, the excess oil in the pipeline will be transported to the accumulator 3 for temporary storage, effectively preventing the leakage of oil and ensuring the accurate control of the oil volume.

[0037] Among them, the anti-water hammer component of the fuel dispenser provided in this embodiment is mainly applied to the field of oil liquid transportation. The overflow valve 1 is the general term for the valve body 101 device, which includes a valve body 101, a first port 102 and a second port 103. A first stopper 2 is provided in the valve body 101. The valve body 101 extends along the first direction a, and the first port 102 and the second port 103 are arranged at intervals on the same side of the valve body 101. At the same time, the first port 102 and the second port 103 are perpendicular to the valve body 101. It can be understood that in order to balance the pressure of the pipeline, when refueling stops, the external control valve will suddenly close. However, the combined pump 10 for oil liquid transportation cannot stop working in time. At the same time, the water hammer effect generated by the sudden stop of the oil liquid flow in the oil pipe will cause the pressure in the pipeline to surge. Furthermore, the pressure in this part will push the first stopper 2 to move in the valve body 101. At this time, the first stopper 2 will move towards the second port 103. Then, a passage is formed between the pipeline and the first port 102, and the pressure and oil liquid will be released into the accumulator 3. On the one hand, it stores the oil liquid that has not been discharged in the pipeline, and on the other hand, it absorbs the pressure in the pipeline, achieving the effect of protecting the pipeline and storing the oil liquid; after the combined pump 10 stops working, the pressure in the pipeline recovers. At this time, the first stopper 2 will return to the position blocking the first port 102. When refueling is carried out next time, the residual oil liquid in the accumulator 3 will be discharged from the second port 103 for use.

[0038] In this article, the term "and / or" only describes the association relationship of associated objects, indicating three possible relationships that can exist. For example, A and / or B is specifically understood as: it can include both A and B at the same time, A can exist alone, or B can exist alone, and it can have any of the above three situations.

[0039] In addition, refer to the appendix Figures 1-3, for the reciprocating motion of the first stopper 2, in this embodiment, the first stopper 2 includes a first valve core 201 and an adjusting assembly 202, and the adjusting assembly 202 includes a sealing cover 2021, an adjusting handwheel 2022, a pressing rod 2023, and an adjusting spring 2024. Under the action of the adjusting spring 2024, the first valve core 201 realizes reciprocating motion between the first port 102 and the second port 103. It can be understood that the change in the pressure in the pipeline causes the first valve core 201 to squeeze the spring. When the pressure is high, it squeezes the adjusting spring 2024, and when the pressure is low, it contracts the adjusting spring 2024. By rotating the thread of the adjusting handwheel 2022 and the sealing cover 2021, the distance that the pressing rod 2023 extends into the valve body 101 can be changed, that is, the position of the adjusting spring 2024 on the side away from the first valve core 201 is changed, and then the range of the spring during expansion and contraction is changed, which can be adjusted according to specific use to ensure that the first valve core 201 does not block the opening of the first port 102 when the adjusting spring 2024 contracts; when the adjusting spring 2024 expands, the first valve core 201 moves away from the second port 103 to ensure that the oil can be discharged from the second port 103 of the accumulator 3 during the next refueling.

[0040] In addition, referring to the attached Figures 1-3 , for the long-term use of the accumulator 3 and to be able to store oil smoothly, a piston 4 is provided inside the accumulator 3. The piston 4 is movably arranged along the direction of gravity. At the same time, a pressure regulating valve 5 is also provided at the top of the accumulator 3, which can change the magnitude of the initial pressure inside the accumulator 3. It can be understood that the inside of the accumulator 3 is divided into a gas chamber 11 and an oil chamber 12 by the piston 4. The air pressure in the gas chamber 11 can be adjusted by the pressure regulating valve 5. During the next refueling, the pressure in the gas chamber 11 is greater than the pressure in the oil chamber 12. When the second port 103 is connected, at this time, the piston 4 will move vertically downward, and the remaining oil in the oil chamber 12 will be squeezed out from the second port 103 and discharged first; on the contrary, when refueling stops, the excess oil will flow into the oil chamber 12 from the first port 102. At this time, the pressure in the gas chamber 11 is less than the pressure in the oil chamber 12, and the piston moves vertically upward. As the gas chamber 11 is squeezed, the internal pressure of the gas chamber 11 gradually increases, and the pipeline pressure can be slowly absorbed. Specifically, the pressure regulating valve 5 can adjust the internal pressure of the gas chamber 11 during these two processes to ensure the normal movement of the piston 4.

[0041] In addition, referring to the attached Figures 1-3, to prevent the oil from flowing into the accumulator 3 from the second port 103 when no oil is being added, a check valve 6 is provided on the side of the valve body 101 away from the first port 102 and the second port 103. The check valve 6 corresponds to the position of the second port 103. At the same time, a spring spool 7 is provided inside the check valve 6. The spring spool 7 can extend and retract downward. It can be understood that when the oil filling stops, the pipeline pressure is too high, and the upward force on the spring spool 7 inside the check valve 6 will not cause the spring spool 7 to extend or retract. Therefore, the oil will not enter the inside of the valve body 101 through the check valve 6 and finally enter the inside of the accumulator 3. When adding oil, it is necessary to drain the oil in the accumulator 3. Since there is an outward pressure in the pipeline at this time, that is, the force acting on the spring spool 7 is downward, the spring spool 7 will be squeezed. Therefore, the check valve 6 is connected to the valve body 101. At the same time, when adding oil, the first spool 201 is far away from the second port 103, and finally a passage of accumulator 3 - valve body 101 - check valve 6 is formed. Therefore, the remaining oil in the accumulator 3 can be smoothly drained to complete the use of the remaining oil.

[0042] Embodiment 2

[0043] Reference appendix Figure 4 , this embodiment provides a fuel dispenser waterproof pipeline system, which includes at least one fuel dispenser water hammer component; it also includes a fueling gun, a flow meter, and a combined pump; among them, the fueling gun, the flow meter, and the combined pump are connected in sequence, the other end of the combined pump is connected to an external oil tank, and the fuel dispenser water hammer component is located between the flow meter and the combined pump. Specifically, the fuel dispenser water hammer component is the fuel dispenser water hammer component of Embodiment 1. For the specific structure and working principle, please refer to the description of Embodiment 1 and will not be elaborated here. The combined pump is a pump body for transporting oil, the flow meter is used to calculate and count the single fueling volume, and a controller is provided inside the fueling gun to control the start and end of fueling.

[0044] So far, the embodiments of the present disclosure have been described in detail. To avoid obscuring the concept of the present disclosure, some details well known in the art have not been described. Those skilled in the art can fully understand how to implement the technical solutions disclosed here based on the above description.

[0045] Although some specific embodiments of the present disclosure have been described in detail by way of examples, those skilled in the art should understand that the above examples are only for illustration and not for limiting the scope of the present disclosure. Those skilled in the art should understand that the above embodiments can be modified or some technical features can be equivalently replaced without departing from the scope and spirit of the present disclosure. In particular, as long as there is no structural conflict, the technical features mentioned in each embodiment can be combined in any way.

Claims

1. A fuel dispenser water hammer prevention assembly, characterized in that, include: A relief valve (1), the relief valve (1) comprising a valve body (101), a first port (102) and a second port (103), the first port (102) and the second port (103) being in communication with the valve body (101), and a first stopper (2) being reciprocatingly arranged inside the valve body (101) to block the first port (102) or the second port (103) according to external pressure; An accumulator (3) is connected to the first port (102) and the second port (103) to store oil overflowing from the valve body (101) under pressure change.

2. A fuel dispenser anti-water hammer assembly according to claim 1, characterized in that: The first stopper (2) comprises a first valve core (201) and an adjustment component (202); The first valve core (201) is movably disposed between the first port (102) and the second port (103), and the regulating component (202) abuts against one end of the first valve core (201) to limit the range of movement of the first valve core (201).

3. A fuel dispenser anti-water hammer assembly according to claim 2, characterized in that: The adjustment assembly (202) comprises a sealing cover (2021), an adjustment hand wheel (2022), a pressing rod (2023), and an adjustment spring (2024); The adjusting spring (2024) and the pressing rod (2023) are located inside the valve body (101), one end of the adjusting spring (2024) is in contact with the first valve core (201), and the other end of the adjusting spring (2024) is in contact with the pressing rod (2023), and the side of the pressing rod (2023) away from the adjusting spring (2024) passes through the valve body (101) and is connected to the adjusting hand wheel (2022), and the sealing cover (2021) is located outside the valve body (101), and the adjusting hand wheel (2022) is threadedly connected to the sealing cover (2021) to push the pressing rod (2023) to move and adjust the telescopic range of the adjusting spring (2024).

4. The fuel dispenser anti-water hammer assembly according to claim 1, characterized in that: The first port (102) and the second port (103) are arranged at intervals along a first direction; Wherein, the first direction is the flow direction of the oil.

5. The fuel dispenser anti-water hammer assembly according to claim 1, characterized in that: A piston (4) is provided inside the accumulator (3), and the piston (4) is arranged inside the accumulator (3) according to pressure changes to collect or discharge oil.

6. The fuel dispenser anti-water hammer assembly according to claim 1, characterized in that: A pressure regulating valve (5) is provided at the top of the accumulator (3) to control the pressure inside the accumulator (3).

7. The fuel dispenser anti-water hammer assembly according to claim 1, characterized in that: Also includes a one-way valve (6); The one-way valve (6) is in communication with the valve body (101), and the one-way valve (6) is disposed opposite to the first port (102) and the second port (103) to block the oil from entering the accumulator when the external fuel dispenser is not working.

8. A fuel dispenser water hammer prevention assembly according to claim 7, wherein the position of the one-way valve (6) corresponds to the position of the second port (103); wherein, when the first stopper (2) blocks the first port (102), the one-way valve (6) is in communication with the second port (103).

9. A fuel dispenser water hammer prevention assembly according to claim 7, wherein a spring spool (7) is provided inside the one-way valve (6) to block or release the control oil according to the change of pressure.

10. A fuel dispenser water hammer prevention pipeline system, characterized in that, It includes: at least the fuel dispenser water hammer prevention assembly according to any one of claims 1-9; further includes a fuel gun (8), a flow meter (9) and a combined pump (10); wherein, the fuel gun (8), the flow meter (9) and the combined pump (10) are connected in sequence, the other end of the combined pump (10) is connected to an external oil tank, and the fuel dispenser water hammer prevention assembly is located between the flow meter (9) and the combined pump (10).

Images