A stop valve

Abstract

The present invention relates to the technical field related to valves, and discloses a stop valve, comprising a valve cover portion, a valve pipe portion being installed on the lower side of the valve cover portion, the valve pipe portion comprising a connecting valve pipe, an input chamber being provided in the connecting valve pipe, an output chamber being provided in the connecting valve pipe, a stop function chamber being provided between the input chamber and the output chamber, a stop plug being installed in the stop function chamber in a liftable and slidable manner, and an elastic wrapping portion being installed on the stop plug; the stop valve of the present invention is provided with a stop buffer function, and an elastic wrapping portion structure is provided on the upper side of the stop plug, which can form a surrounding effect on the valve stem of the transmission connection structure of the stop plug, thereby preventing the valve stem from being placed in the stop function chamber for a long time and being affected by corrosion and impact, thereby improving the effective service life of the valve.

Description

Technical Field

[0001] The present invention relates to the technical field of valves, in particular to a stop valve. Background Art

[0002] In the field of oil extraction and transportation, various valves are usually needed to control pipelines. Among them, the stop valve is a valve used to quickly control circulation and interruption. The stop valve achieves the shut-off effect on the flowing liquid by setting a cut-off structure between the inlet and the outlet. The liquid has momentum during the flow process, and the stop valve directly intercepts and blocks it, so that the momentum of the liquid at the inlet end directly impacts the circulation pipeline and the valve body, thereby causing the service life of the pipe body and the stop valve to be reduced. Summary of the invention

[0003] The object of the present invention is to provide a stop valve to overcome the above-mentioned defects in the prior art.

[0004] The present invention is achieved through the following technical solutions.

[0005] A stop valve of the present invention comprises a valve cover portion, a valve tube portion is installed on the lower side of the valve cover portion, the valve tube portion comprises a connecting valve tube, an input cavity is provided in the connecting valve tube, an output cavity is provided in the connecting valve tube, a stop function cavity is provided between the input cavity and the output cavity, a stop plug is installed in the stop function cavity in a liftable and slidable manner, the stop plug is installed with an elastic wrapping portion, a filling cavity is provided in the elastic wrapping portion, a buffer channel is provided on the inner wall of the input cavity, a two-way solenoid valve is installed in the buffer channel, a docking connecting groove is installed on the stop plug, a buffer function body is provided on the upper side of the connecting valve tube, a buffer ring cavity is provided on the inner wall of the buffer function body, a piston ring plate is slidably installed in the buffer ring cavity.

[0006] According to a further technical solution, the valve cover portion includes a valve cover, the valve cover is equipped with a valve stem mounting member, the valve stem mounting member is rotatably mounted with a valve stem, a hand wheel is mounted on the top end of the valve stem, the valve stem passes through the valve cover and the inner wall structure of the valve tube portion, and the end of the valve stem is rotatably connected to the stop plug.

[0007] According to a further technical solution, the valve cover is equipped with an air pump.

[0008] According to a further technical solution, an air pressure input port is provided in the buffer ring cavity, the air pressure input port is connected to the air pump, a support spring is installed in the buffer ring cavity, and the support spring is against the piston ring plate.

[0009] According to a further technical solution, the cut-off plug is provided with a buffer input port, the buffer input port is placed in the filling cavity, the buffer input port is communicated with the docking connecting groove, the inner wall of the buffer ring cavity is provided with a connecting channel, and the connecting channel is communicated with the filling cavity.

[0010] According to a further technical solution, the piston ring plate is provided with a control valve.

[0011] According to a further technical solution, a ring groove is provided on the inner ring of the elastic wrapping portion, and the valve stem is placed in the ring groove.

[0012] According to a further technical solution, the elastic wrapping portion is a bellows or a hose.

[0013] Beneficial effects of the present invention:

[0014] A stop valve of the present invention is provided with a stop buffer function, and an elastic wrapping part structure is provided on the upper side of the stop plug, which can form a surrounding effect on the valve stem of the transmission connection structure of the stop plug, thereby preventing the valve stem from being placed in the stop function cavity for a long time and being affected by corrosion and impact, thereby improving the effective service life of the valve. At the same time, during the stop process, the stop plug blocks the end of the input cavity, so that the flowing liquid has inertia and the pressure in the input cavity increases. At this time, the stop plug is in place, the docking communication groove is docked with the buffer channel, and the one-way communication is started by the two-way solenoid valve, so that the liquid in the input cavity enters the filling cavity from the transmission structure through the buffer channel, so that the filling cavity expands after being filled with liquid, thereby forming a fitting and squeezing effect on the inner wall of the stop function cavity, so that the liquid on the inner wall of the stop function cavity is accelerated to be discharged into the output cavity, thereby avoiding the problem of waste caused by the accumulation of liquid in the stop function cavity and corrosion of the internal structure;

[0015] The stop valve of the present invention is provided with a stop buffer function. At the same time, the filling effect of the stop function cavity is realized by the expansion of the elastic wrapping part. After the liquid in the elastic wrapping part is filled, it can be input into the buffer ring cavity through the connecting structure, pushing the piston ring plate to slide upward, so that the buffer ring cavity temporarily stores the excess oil. The elastic wrapping part is filled and expanded and the buffer ring cavity is used to temporarily store the oil to buffer the impact force of the liquid during the stop, so as to avoid the problem of impact and vibration of the valve body and the transportation pipeline caused by the inertia of the liquid during the stop process, thereby improving the service life of the valve body;

[0016] A stop valve of the present invention realizes the reset and return effect of accumulated oil during buffering by setting a stop buffer function and cooperating with a starting transmission component. After the stop action is completed, when the pressure in the input chamber gradually returns to normal after a period of time, the piston ring plate is pushed to reset by the pneumatic component, and at the same time, the two-way solenoid valve starts the one-way connection, so that the oil stored in the buffer ring chamber and the filling chamber is returned to the input chamber through the buffer channel, achieving the effect of buffering the impact force of the liquid while avoiding the waste of overflowing oil. At the same time, through the control of the pneumatic component and the connecting structure, the filling chamber can be flushed with air pressure, so that the elastic wrapping part is in an expanded state to form a filling effect on the stop function chamber, thereby avoiding the problem of valve body leakage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0018] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0019] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0020] Figure 2 yes Figure 1 A schematic cross-sectional structure diagram of ;

[0021] Figure 3 yes Figure 2 An enlarged schematic diagram of the structure of the middle valve tube portion 11;

[0022] Figure 4 yes Figure 3 A schematic diagram of the enlarged structure at A in the middle;

[0023] Figure 5 yes Figure 3 Schematic diagram of the enlarged structure of B; DETAILED DESCRIPTION

[0024] Combine the following Figure 1-5 The present invention is described in detail. For the convenience of description, the directions mentioned below are defined as follows: the up, down, left, right, front, and back directions mentioned below are the same as Figure 1 The up-down, left-right, front-back directions of the projection relationship itself are consistent.

[0025] Combined with Figure 1-5The stop valve comprises a valve cover portion 12, a valve tube portion 11 is installed on the lower side of the valve cover portion 12, the valve tube portion 11 comprises a connecting valve tube 18, an input chamber 19 is provided in the connecting valve tube 18, an output chamber 20 is provided in the connecting valve tube 18, a stop function chamber 21 is provided between the input chamber 19 and the output chamber 20, a stop plug 24 is installed in the stop function chamber 21 so as to be able to be lifted and slidably, the stop plug 24 is installed with an elastic wrapping portion 23, a filling chamber 22 is provided in the elastic wrapping portion 23, a buffer channel 34 is provided on the inner wall of the input chamber 19, a two-way solenoid valve 35 is installed in the buffer channel 34, a docking connecting groove 36 is installed on the stop plug 24, a buffer function body 31 is provided on the upper side of the connecting valve tube 18, a buffer ring chamber 25 is provided on the inner wall of the buffer function body 31, a piston ring plate 26 is slidably installed in the buffer ring chamber 25.

[0026] During operation, the stop plug 24 is driven by the transmission structure to adjust its position. When the stop plug 24 is placed at the end of the input chamber 19, a blocking and cutting effect is formed. The setting of the elastic wrapping part 23 forms a surrounding effect on the connection structure of the stop plug 24, thereby preventing it from being placed in the stop function chamber 21 for a long time and being corroded and impacted, thereby improving the effective service life of the valve. At the same time, during the cut-off process, the stop plug 24 blocks the end of the input chamber 19, so that the flowing liquid has inertia and the pressure in the input chamber 19 increases. At this time, the stop plug 24 is in place, and the docking communication groove 36 is docked with the buffer channel 34. The one-way communication is started through the two-way solenoid valve 35, so that the liquid in the input chamber 19 enters the filling chamber 22 from the transmission structure through the buffer channel 34, so that the filling chamber 22 expands after being filled with liquid, thereby forming a fitting and squeezing effect on the inner wall of the stop function chamber 21, so that the liquid on the inner wall of the stop function chamber 21 is accelerated to be discharged into the output chamber 20, thereby avoiding the problem of waste caused by the accumulation of liquid in the stop function chamber 21 and corrosion of the internal structure. When the liquid in the wrapping part 23 is filled, it is input into the buffer ring cavity 25 through the connecting structure, pushing the piston ring plate 26 to slide upward, so that the excess oil in the buffer ring cavity 25 is temporarily stored, so that the elastic wrapping part 23 is filled and expanded and the buffer ring cavity 25 is used to temporarily store the impact force of the liquid during the cut-off, so as to avoid the problem of impact and shaking of the valve body and the transportation pipeline caused by the liquid inertia during the cut-off process, thereby improving the service life of the valve body. After the cut-off action is completed, the pressure in the input cavity 19 gradually returns to normal for a period of time, so that the piston ring plate 26 is pushed to reset through the pneumatic component, and at the same time, the two-way solenoid valve 35 starts the one-way connection, so that the oil stored in the buffer ring cavity 25 and the filling cavity 22 is returned to the input cavity 19 through the buffer channel 34, so as to achieve the effect of buffering the impact force of the liquid while avoiding the waste of overflowing oil. At the same time, through the control of the pneumatic component and the connecting structure, the filling cavity 22 can be injected with air pressure, so that the elastic wrapping part 23 is in an expanded state to form a filling effect on the cut-off function cavity 21, thereby avoiding the problem of valve body leakage.

[0027] Preferably, the valve cover portion 12 includes a valve cover 13, the valve cover 13 is equipped with a valve stem mounting member 14, the valve stem mounting member 14 is rotatably equipped with a valve stem 15, a hand wheel 16 is installed at the top of the valve stem 15, the valve stem 15 passes through the valve cover 13 and the inner wall structure of the valve tube portion 11, and the end of the valve stem 15 is rotatably connected to the cut-off plug 24.

[0028] The valve cover 13 is connected to the valve pipe part 11 for sealing and installation, and the hand wheel 16 is turned to cooperate with the valve stem 15 to realize the lifting and lowering control of the cut-off plug 24 so as to perform the cut-off and connection operations.

[0029] Preferably, the valve cover 13 is equipped with an air pump 17 .

[0030] The pneumatic transmission effect is achieved by setting the air pump 17.

[0031] Preferably, an air pressure input port 28 is provided in the buffer ring cavity 25 , and the air pressure input port 28 is communicated with the air pump 17 . A support spring 27 is installed in the buffer ring cavity 25 , and the support spring 27 abuts against the piston ring plate 26 .

[0032] The supporting spring 27 and the piston ring plate 26 are used to resist each other to realize the effect of positioning the buffer ring cavity 25 in an empty state. The oil is input into the buffer ring cavity 25 under pressure, so that the piston ring plate 26 slides upward, and the buffer ring cavity 25 realizes the effect of storing oil. The air pump 17 is started to push the piston ring plate 26 downward to realize the effect of returning oil.

[0033] Preferably, the cut-off plug 24 is provided with a buffer input port 37 , and the buffer input port 37 is placed in the filling cavity 22 . The buffer input port 37 is connected to the docking connecting groove 36 . The inner wall of the buffer ring cavity 25 is provided with a connecting channel 30 , and the connecting channel 30 is connected to the filling cavity 22 .

[0034] The oil transmitted through the buffer channel 34 enters the filling chamber 22 through the docking connecting groove 36, so as to achieve the effect of expanding the filling chamber 22. At the same time, after the filling chamber 22 is expanded and fully stored, the oil enters the buffer ring chamber 25 through the connecting channel 30 for buffer storage.

[0035] Preferably, the piston ring plate 26 is provided with a control valve 29 .

[0036] By setting the control valve 29, when the filling chamber 22 and the buffer ring chamber 25 are empty, the air pump 17 starts the control valve 29 to achieve the expansion effect of the air pressure injected into the filling chamber 22, so that the elastic wrapping part 23 expands to form a filling effect on the cut-off function chamber 21, thereby avoiding the leakage problem.

[0037] Preferably, a ring groove 38 is provided inside the elastic wrapping portion 23 , and the valve stem 15 is placed in the ring groove 38 .

[0038] The end of the valve stem 15 is wrapped by the annular groove 38, thereby preventing the valve stem 15 from being affected by moisture and the like, thereby preventing the valve stem 15 from aging and affecting the transmission.

[0039] The elastic wrapping portion 23 is a corrugated tube or a hose.

[0040] The above embodiments are only for illustrating the technical concept and features of the present invention, and their purpose is to enable people familiar with the technology in this field to understand the content of the present invention and implement it, and they cannot be used to limit the protection scope of the present invention. Any equivalent changes or modifications made according to the spirit of the present invention should be included in the protection scope of the present invention.

Claims

1. A stop valve, comprising a valve cover, characterized in that: A valve tube portion is installed at the lower side of the valve cover portion, and the valve tube portion includes a connecting valve tube, an input cavity is arranged in the connecting valve tube, an output cavity is arranged in the connecting valve tube, a cut-off function cavity is arranged between the input cavity and the output cavity, a cut-off plug is installed in the cut-off function cavity in a lifting and sliding manner, and an elastic wrapping portion is installed on the cut-off function cavity, and the elastic wrapping portion is arranged in the cut-off function cavity to avoid the problem of liquid accumulation on the inner wall of the cut-off function cavity, and a filling cavity is arranged in the elastic wrapping portion, and the filling cavity can be filled with liquid for buffering pressure or filled with gas for expansion and fitting the cut-off function. The inner wall of the energy cavity can prevent liquid accumulation, the inner wall of the input cavity is provided with a buffer channel, and the buffer channel is installed with a two-way solenoid valve. The two-way solenoid valve realizes the buffering process through the two-way valve control. The oil is transmitted by the buffer channel to perform pressure buffering effect, thereby reducing impact force and vibration, and the buffer channel can perform a back-transmission function to avoid oil waste and leakage due to buffering transmission. The stop plug is installed with a docking connecting groove, and a buffer functional body is provided on the upper side of the connecting valve pipe. The inner wall of the buffer functional body is provided with a buffer ring cavity, and a piston ring plate is slidably installed in the buffer ring cavity.

2. A stop valve according to claim 1, characterized in that: The valve cover part includes a valve cover, the valve cover is installed with a valve stem mounting part, the valve stem is rotatably mounted on the valve stem mounting part, a hand wheel is installed on the top end of the valve stem, the valve stem passes through the valve cover and the inner wall structure of the valve tube part, and the end of the valve stem is rotatably connected with the stop plug.

3. A stop valve according to claim 2, characterized in that: The valve cover is equipped with an air pump, which is used for air pressure transmission function.

4. A stop valve according to claim 3, characterized in that: An air pressure input port is provided in the buffer ring cavity, and the air pressure input port is connected to the air pump. A support spring is installed in the buffer ring cavity, and the support spring is against the piston ring plate. The volume of the buffer ring cavity is larger than that of the filling cavity, so that more liquid can be stored.

5. A stop valve according to claim 1, characterized in that: The cut-off plug is provided with a buffer input port, and the buffer input port is placed in the filling cavity. The buffer input port is connected with the docking connecting groove. The buffer input port is connected with the buffer channel to realize the transmission of buffer oil from the input port into the filling cavity. The inner wall of the buffer ring cavity is provided with a connecting channel, and the connecting channel is connected with the filling cavity. The setting of the connecting channel facilitates the filling effect of the cut-off functional cavity after the buffer storage in the filling cavity is fully loaded, and continues to provide the buffering effect of more oil by the buffer ring cavity.

6. A stop valve according to claim 1, characterized in that: The piston ring plate is provided with a control valve, and the control valve is used to control whether the air pressure can be transmitted through the piston ring plate.

7. A stop valve according to claim 2, characterized in that: The inner ring of the elastic wrapping portion is provided with a ring sleeve groove, and the end of the valve stem is placed in the ring sleeve groove.

8. A stop valve according to claim 1 or 7, characterized in that: The elastic wrapping part is a bellows or a hose.

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