Axial-flow type check valve with slow closing function

Abstract

The utility model discloses an axial-flow type check valve with a slow closing function. The axial-flow type check valve comprises a fixed seat, a valve body, a transmission screw rod, a liquid inlet pipeline, a transmission sleeve, a liquid outlet pipeline, a valve core and a throttling device, according to the utility model, the throttler is arranged at the top of the barrel, so that the throttler is matched with the barrel to play a role in throttling and limiting the flowing water flow, and the impact force of the water flow on the valve core is ensured to be within a normal threshold value range, thereby reducing the abrasion strength of the valve core, prolonging the service life of the valve core and improving the safety of the valve core. Therefore, the water pressure of the water flow flowing into the valve body is adjusted through the throttling device, the situation that the water pressure directly or indirectly affects the valve element and causes excessive abrasion of the valve element is prevented, and the problems that in original equipment, the valve element is directly flushed along with the water flow, the service life of the valve element is generally short, and the service life of the valve element is short are solved. And workers need to carry out regular maintenance or replacement in the subsequent maintenance work.

Description

TECHNICAL FIELD

[0001] The utility model relates to the valve related field especially, a kind of axial flow check valve with slow closing function. BACKGROUND

[0002] Check valve is the valve that the opening and closing part is circular valve flap and is acted by its own weight and medium pressure to block the backflow of medium;Axial flow check valve is a kind of check valve, in addition to the function of general check valve, it also has damping spring, and the combined sealing structure with hard sealing and soft sealing cap cooperation has the effect of silencing, shock absorption, etc., is convenient for user on-site maintenance, with the advantages of small flow resistance, large flow coefficient, small size, etc., is the valve of domestic and foreign oil and gas transportation pipe network.

[0003] The Chinese patent document with publication number CN221838970U discloses an axial flow check valve, which is provided with a spring structure. Under the action of the spring, the valve flap approaches the annular abutting end. At this time, the alloy sealing ring on the valve flap is in contact with the sealing surface. The sealing surface is provided with an abutting sealing ring, which reduces the abutting area of the sealing surface. In cooperation with the alloy sealing ring, the overall volume of the alloy sealing ring is reduced, and the cost is reduced.

[0004] The original equipment has deficiencies in the actual assembly process. Since the water inlet pipeline and the valve body are in communication with each other, although the original equipment is provided with an auxiliary structure to assist the valve core in moving, the valve core is directly washed by the water flow with water pressure, which can cause the service life of the valve core to be generally short, and the subsequent maintenance work requires regular maintenance or replacement by the staff, thereby preventing leakage. UTILITY MODEL CONTENTS

[0005] Therefore, in order to solve the above problems, the utility model provides an axial flow check valve with slow closing function.

[0006] In order to achieve the above purpose, the utility model adopts the following technical scheme: an axial flow check valve with slow closing function, comprising a fixed seat, a valve body, a transmission screw, a liquid inlet pipeline, a transmission sleeve, a liquid outlet pipeline, a valve core and a throttling device, the top of the fixed seat is provided with the valve body, the inner top end of the valve body is installed with the transmission sleeve, the transmission screw is in screw thread cooperation with the inside of the transmission sleeve, the bottom of the transmission screw is installed with the valve core, the valve core is rotationally connected with the inside of the valve body, the liquid inlet pipeline is arranged at the left end of the valve body, the transmission sleeve is arranged at the inner top end of the valve body, the liquid outlet pipeline is in communication with the right end of the valve body, the throttling device is fixed with the inside of the liquid inlet pipeline, and the liquid outlet pipeline is connected with the left end of the feed pipeline.

[0007] As an improved axial flow check valve with slow closing function, the throttle device comprises a cylinder, a flow guide hopper, a sealing ring, a throttle cavity and a throttler, the cylinder is fixed with the inside of the liquid inlet pipeline, the flow guide hopper is fixed to the left end of the cylinder, the sealing ring is nested in the left end of the flow guide hopper, the sealing ring is in contact with the inside of the liquid inlet pipeline, the throttle cavity is arranged in the inside of the cylinder, and the throttler is connected with the top of the cylinder.

[0008] As an improved axial flow check valve with slow closing function, the throttler comprises a waterproof shell, a servo motor, a transmission arm, a limiting groove and a throttling plate, the waterproof shell is fixed with the top of the cylinder, the servo motor is installed in the inside of the waterproof shell, the servo motor is in transmission connection with the left end of the transmission arm through a shaft coupling, the transmission arm is in transmission with the top left side of the throttling plate, the limiting groove is arranged in the inside of the waterproof shell, the throttling plate is in sliding connection with the inside of the limiting groove, and the throttling plate is movably embedded in the top of the cylinder.

[0009] As an improved axial flow check valve with slow closing function, the inside size of the sealing ring is consistent with the outside size of the flow guide hopper.

[0010] As an improved axial flow check valve with slow closing function, the throttle cavity is arranged in the inside of the cylinder in a stepped shape, so that the throttle cavity can change the flow direction of water flow, the water pressure can be lowered downward, and the throttle buffer effect on water pressure can be achieved.

[0011] As an improved axial flow check valve with slow closing function, the right end top of the cylinder is provided with a mounting groove, so that the throttler can be mounted on the top of the cylinder, and the space cost can be maximized.

[0012] As an improved axial flow check valve with slow closing function, the limiting groove and the throttling plate are arranged in the inside of the waterproof shell in a straight line.

[0013] As an improved axial flow check valve with slow closing function, the left end of the limiting groove is provided with a guide sliding groove, so that the transmission arm can transmit power to the left end of the throttling plate through the limiting groove.

[0014] Compared with the prior art, the axial flow check valve with slow closing function has the following beneficial effects:

[0015] Advantage 1: the utility model discloses a throttling device is set up in the top of the cylinder, and the throttling device cooperates with the cylinder to play the throttling limiting effect to the flowing water, guarantees that the valve core can be impacted by the water flow within the normal threshold, thereby reducing the wear intensity of the valve core, delaying the service life of the valve core, and further achieving the effect of adjusting the water pressure of the water flowing into the valve body by the throttling device, preventing the water pressure from directly or indirectly affecting the valve core, causing the valve core to be excessively worn, and further solving the problem that the valve core is directly washed by the water flow in the original equipment, causing the service life of the valve core to be generally short, and causing the staff to need to regularly maintain or replace in the subsequent maintenance work.

[0016] Advantage 2: the utility model discloses a throttling device is set up in the top of the cylinder, and the throttling device cooperates with the cylinder to play the throttling limiting effect to the flowing water, guarantees that the valve core can be impacted by the water flow within the normal threshold, thereby reducing the wear intensity of the valve core, delaying the service life of the valve core, and further achieving the effect of adjusting the water pressure of the water flowing into the valve body by the throttling device, preventing the water pressure from directly or indirectly affecting the valve core, causing the valve core to be excessively worn, and further solving the problem that the valve core is directly washed by the water flow in the original equipment, causing the service life of the valve core to be generally short, and causing the staff to need to regularly maintain or replace in the subsequent maintenance work. BRIEF DESCRIPTION OF DRAWINGS

[0017] Fig. 1 is the three-dimensional structure schematic diagram of the utility model;

[0018] Fig. 2 is the plane structure schematic diagram of the utility model;

[0019] Fig. 3 is the three-dimensional structure schematic diagram of the throttling device of the utility model;

[0020] Fig. 4 is the internal structure schematic diagram of the throttling device of the utility model;

[0021] Fig. 5 is the throttling device structure schematic diagram of the utility model.

[0022] Among them: fixed seat-1, valve body-2, transmission screw-3, liquid inlet pipeline-4, transmission sleeve-5, liquid outlet pipeline-6, valve core-7, throttling device-8, cylinder-81, flow guide hopper-82, sealing ring-83, throttling cavity-84, throttling device-85, waterproof shell-851, servo motor-852, transmission arm-853, limiting groove-854, throttling plate-855. DETAILED DESCRIPTION

[0023] In order to further explain the technical scheme of the utility model, the following specific embodiment is described in detail.

[0024] Please refer to Figs. 1-2The utility model discloses an improved axial -flow check valve with slow closing function, including fixed seat 1, valve body 2, drive screw rod 3, liquid inlet pipeline 4, transmission sleeve 5, liquid outlet pipeline 6, valve element 7, throttling device 8, the top of fixed seat 1 is provided with valve body 2, the inside top of valve body 2 is installed with transmission sleeve 5, and drive screw rod 3 is cooperated with the inside screw thread of transmission sleeve 5, and the bottom of drive screw rod 3 is installed with valve element 7, and valve element 7 is rotatably connected with the inside of valve body 2, and liquid inlet pipeline 4 is set up in the left end of valve body 2, and transmission sleeve 5 is set up in the inside top of valve body 2, and liquid outlet pipeline 6 is connected with the right end of valve body 2, and throttling device 8 is fixed with the inside of liquid inlet pipeline 4, and liquid outlet pipeline 6 is connected with the left end of feed pipeline.

[0025] Please refer to Figs. 3-4 The utility model discloses an improved axial -flow check valve with slow closing function, and throttling device 8 includes cylinder body 81, guide chute 82, sealing ring 83, throttling cavity 84, throttling ware 85, cylinder body 81 is fixed with the inside of liquid inlet pipeline 4, and guide chute 82 is fixed in the left end of cylinder body 81, and sealing ring 83 is nested in the left end of guide chute 82, and sealing ring 83 is contacted with the inside of liquid inlet pipeline 4, and throttling cavity 84 is set up in the inside of cylinder body 81, and throttling ware 85 is connected with the top of cylinder body 81.

[0026] In the embodiment: the inside size of sealing ring 83 is consistent with the outside size of guide chute 82, and throttling cavity 84 is set up in the inside of cylinder body 81 and presents as ladder shape, guarantees that throttling cavity 84 can change the flow direction of water flow, makes the water pressure drop downward, plays the role of throttling buffer to water pressure, and the right end top of cylinder body 81 is provided with mounting groove, guarantees that throttling ware 85 can be installed on the top of cylinder body 81, can maximize the use of space cost.

[0027] Please refer to Fig. 5 The utility model discloses an improved axial -flow check valve with slow closing function, and throttling ware 85 includes waterproof shell 851, servo motor 852, transmission arm 853, limit groove 854, throttling plate 855, waterproof shell 851 is fixed with the top of cylinder body 81, and servo motor 852 is installed in the inside of waterproof shell 851, and servo motor 852 adopts shaft coupling and is drivenly connected with the left end of transmission arm 853, and transmission arm 853 is nested transmission with the top left side of throttling plate 855, and limit groove 854 is set up in the inside of waterproof shell 851, and throttling plate 855 is slidably connected with the inside of limit groove 854, and throttling plate 855 is movably embedded with the top of cylinder body 81.

[0028] In the embodiment: limit groove 854 and throttling plate 855 are arranged in the inside of waterproof shell 851 and are in a straight line, and the left end of limit groove 854 is equipped with guide sliding slot, guarantees that transmission arm 853 can pass through limit groove 854 and transmit power to the left end of throttling plate 855.

[0029] Reference Figs. 1-5 When the water flow enters the valve body 2 from the liquid inlet pipe 4, the flow guide 82 can guide the water flow into the throttling chamber 84 by setting the cylinder 81 inside the liquid inlet pipe 4, so that the water flow flows from the left end of the throttling chamber 84, and under the influence of the stepped structure inside the throttling chamber 84, the straight water flow is guided to curved flow, thereby reducing the impact force of the water flow, ensuring that the valve core 7 can be impacted by the water flow within a normal threshold, thereby reducing the wear intensity of the valve core 7 and prolonging the service life of the valve core 7.

[0030] According to the situation, the servo motor 852 is started to drive the transmission arm 853 to rotate, so that the transmission arm 853 drives the throttling plate 855 to slide downward along the limiting groove 854, and when the throttling plate 855 slides inside the cylinder 81, the throttling plate 855 can cooperate with the cylinder 81 to reduce the flow of the water flow, so that the water flow can be quickly cut off, preventing the water pressure from being too high to cause the pipeline to be broken, and the throttling device 8 is arranged at the top of the cylinder 81, so that the throttling device 8 cooperates with the cylinder 81 to throttle the flowing water flow, ensuring that the valve core 7 can be impacted by the water flow within a normal threshold, thereby reducing the wear intensity of the valve core 7 and prolonging the service life of the valve core 7, thereby achieving the purpose of adjusting the water pressure of the water flow flowing into the valve body 2 through the throttling device 8, preventing the water pressure from directly or indirectly affecting the valve core 7, causing excessive wear of the valve core 7, and solving the problem that the valve core is directly washed by the water flow in the original equipment, which can cause the service life of the valve core to be generally short, and the workers need to regularly maintain or replace the valve core in the subsequent maintenance work.

[0031] Further, by manually rotating the transmission screw 3, the transmission screw 3 is screwed with the liquid inlet pipe 4, so that the valve core 7 rotates with the transmission screw 3, so that the valve core 7 can be rotated to the open valve position, and the water flow can flow out of the liquid outlet pipe 6.

[0032] The control mode of the utility model is controlled by manually starting and closing the switch, and the wiring diagram of the power element and the power supply belong to the public knowledge in the field, and the utility model is mainly used for protecting mechanical devices, so the control mode and the wiring arrangement will not be explained in detail.

[0033] The control mode of the utility model is automatically controlled by the controller, and the control circuit of the controller can be realized by simple programming of the technical personnel in the field, and the power supply also belongs to the public knowledge in the field, and the utility model is mainly used for protecting mechanical devices, so the control mode and the circuit connection will not be explained in detail.

[0034] The above merely describes preferred examples of the present application and is not intended to limit the present application, and although the present application has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions recorded in the foregoing embodiments, or equivalently replace some of the technical features. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A slow-closing function axial check valve, comprising a fixed seat (1), a valve body (2), a transmission screw rod (3), a liquid inlet pipeline (4), a transmission sleeve (5), a liquid outlet pipeline (6), a valve core (7), and a throttling device (8), wherein the top of the fixed seat (1) is provided with the valve body (2). characterized in that The throttling device (8) comprises a cylinder body (81), a flow guide hopper (82), a sealing ring (83), a throttling cavity (84), and a throttling plate (85), wherein the cylinder body (81) is fixed with the inside of the liquid inlet pipeline (4), the flow guide hopper (82) is fixed to the left end of the cylinder body (81), the sealing ring (83) is nested in the left end of the flow guide hopper (82), the sealing ring (83) is in contact with the inside of the liquid inlet pipeline (4), the throttling cavity (84) is arranged in the inside of the cylinder body (81), and the throttling plate (85) is connected with the top of the cylinder body (81).

2. The axial flow check valve with slow closing function according to claim 1, characterized in that: The throttling plate (85) comprises a waterproof shell (851), a servo motor (852), a transmission arm (853), a limiting groove (854), and the throttling plate (855), wherein the waterproof shell (851) is fixed with the top of the cylinder body (81), the servo motor (852) is installed in the inside of the waterproof shell (851), the servo motor (852) is in transmission connection with the left end of the transmission arm (853) through a shaft coupling, the transmission arm (853) is nested in transmission with the top left side of the throttling plate (855), the limiting groove (854) is arranged in the inside of the waterproof shell (851), the throttling plate (855) is in sliding connection with the inside of the limiting groove (854), and the throttling plate (855) is movably embedded with the top of the cylinder body (81).

3. The axial flow check valve with slow closing function according to claim 1, characterized in that: The inside of the sealing ring (83) is consistent in size with the outside of the flow guide hopper (82).

4. The axial flow check valve with slow closing function according to claim 1, characterized in that: The throttling cavity (84) is arranged in the inside of the cylinder body (81) in a stepped shape.

5. The axial flow check valve with slow closing function according to claim 1, characterized in that: The right end top of the cylinder body (81) is provided with a mounting groove.

6. The axial flow check valve with slow closing function according to claim 2, characterized in that: The limiting groove (854) and the throttling plate (855) are arranged in the inside of the waterproof shell (851) in a straight line.

7. The axial flow check valve with slow closing function according to claim 2, characterized in that: The left end of the limiting groove (854) is provided with a guide sliding groove, so that the transmission arm (853) can transmit power to the left end of the throttling plate (855) through the limiting groove (854).

8. The axial flow check valve with slow closing function according to claim 1, characterized in that: The inside top of the valve body (2) is provided with the transmission sleeve (5), the transmission screw rod (3) is in screw connection with the inside of the transmission sleeve (5), the bottom of the transmission screw rod (3) is provided with the valve core (7), the valve core (7) is in rotary connection with the inside of the valve body (2), the liquid inlet pipeline (4) is arranged at the left end of the valve body (2), the transmission sleeve (5) is arranged at the inside top of the valve body (2), the liquid outlet pipeline (6) is in communication with the right end of the valve body (2), the throttling device (8) is fixed with the inside of the liquid inlet pipeline (4), and the liquid outlet pipeline (6) is connected with the left end of the feed pipeline.

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