Low-temperature check valve for preventing medium from flowing back for industrial pipeline
By designing an anti-backflow structure and sealing components, the problem of media backflow in low-speed or discontinuous liquid transportation is solved, achieving efficient backflow prevention and sealing, and ensuring smooth media flow.
Patent Information
- Application Number
- CN202423060216.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-11
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2034-12-11
AI Technical Summary
Existing check valves have poor sealing performance when the liquid delivery speed is slow or intermittent, leading to frequent backflow of the medium and reducing the check valve effect and accuracy.
It adopts an anti-reverse structure and sealing components, including an anti-reverse pipe, a conical cover, a limiting plate, a spring body, a limiting tube, a flow guide hole, and a seal. Through the cooperation of the conical cover and the anti-reverse pipe, and by utilizing the elastic ring and the spring, the forward and reverse flow of the medium is prevented.
It effectively prevents backflow of the medium, improves the check valve's check effect, ensures smooth flow of the medium in the valve body, avoids straight flow and backflow of liquid, and enhances the check valve's sealing performance and responsiveness.
Smart Images
Figure CN223595089U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model relates to low temperature check valve technical field, concretely is a kind of low temperature check valve of industrial pipeline prevents medium backflow. BACKGROUND
[0002] Check valve is a kind of one-way valve that can prevent liquid backflow, when check valve water, water flow will bring certain pressure to the valve structure inside check valve, to push valve structure and make check valve keep open state, when the positive water flow disappears, valve structure will be automatically restored under the action of elastic structure, to prevent the occurrence of liquid backflow phenomenon, therefore, check valve has important significance in pipeline connection.
[0003] The existing check valve has backflow phenomenon when liquid conveying speed is slow or intermittent, and the sealing property is not high and the check structure is slow to respond, so that the check effect of check valve is reduced, the quality of check valve is low, the economic benefits brought by check valve are reduced, and most of the liquid is straight through when check valve is open, when liquid conveying is suddenly stopped, part of liquid also has backflow phenomenon, so that the accuracy of check valve is reduced, therefore, we propose a kind of low temperature check valve of industrial pipeline prevents medium backflow to solve the above problems. UTILITY MODEL CONTENTS
[0004] In view of the deficiencies of prior art, the utility model provides a kind of low temperature check valve of industrial pipeline prevents medium backflow, solves the problems mentioned in background art.
[0005] The utility model solves technical scheme that its technical problem adopts: a kind of low temperature check valve of industrial pipeline prevents medium backflow, including valve body, the top of the valve body is fixedly connected with connector, the inside of the connector is equipped with internal thread, the bottom of the valve body is fixedly connected with water inlet pipe, the outer wall of the water inlet pipe is equipped with external thread, the inside center of the valve body is equipped with annular groove, the inside of the valve body is close to annular groove and is equipped with limit slot, the inside of the valve body is equipped with anti-reverse structure, the inner wall top of the valve body is fixedly installed with conical tube close to annular groove, the outer wall of the conical tube is sleeved with conical spring.
[0006] Further, the anti-reverse structure comprises an anti-reverse pipe, a conical cover, a water outlet hole, a limiting plate, a spring body, a limiting pipe, a flow guide hole and a sealing assembly, the outer wall of the anti-reverse pipe is movably connected in the valve body and the water inlet pipe, the top end of the anti-reverse pipe is fixedly connected with the conical cover, the outer wall of the anti-reverse pipe is provided with the water outlet hole, the outer wall of the conical cover is fixedly connected with the limiting plate, the upper surface of the limiting plate is fixedly connected with the spring body, the top end outer wall of the conical cover is fixedly connected with the limiting pipe, the outer wall of the limiting pipe is provided with a plurality of flow guide holes arranged in a ring shape, and the outer wall of the anti-reverse pipe is provided with the sealing assembly.
[0007] Further, the sealing assembly comprises a base, a through hole, a conical ring groove, a limiting ring groove, a sealing element, an elastic ring, a conical sealing ring, a clamping groove and a rubber ring, the outer wall of the base is fixedly connected to the inner wall bottom of the annular groove, the bottom end of the base is provided with the through hole, the top end of the base is provided with the conical ring groove, the inside of the base near the conical ring groove is provided with the limiting ring groove, the inside of the limiting ring groove is fixedly connected with the sealing element, the top end of the base is fixedly connected with the elastic ring, the top end of the base is fixedly connected with the conical sealing ring, the bottom end of the conical sealing ring is provided with the clamping groove, and the top end of the conical sealing ring is fixedly connected with the rubber ring.
[0008] Further, the inside of the clamping groove is clamped with the elastic ring, the inside of the conical sealing ring is movably connected with the conical cover, and the inside of the rubber ring is movably connected with the conical cover.
[0009] By adopting the above technical scheme, the elastic ring has elasticity, when the medium stops conveying, the pushing force generated by the medium disappears, the conical cover and the anti-reverse pipe return to the original position under the action of the spring body and the conical spring, the elastic ring can tighten the bottom end of the conical sealing ring, and the sealing ring can seal the outer wall of the conical cover, so that the non-return effect of the check valve can be improved.
[0010] Further, the inside of the base is movably connected with the anti-reverse pipe and the conical cover, and the outer wall of the sealing element is attached to the outer wall of the conical cover.
[0011] By adopting the above technical scheme, the outer wall of the conical cover and the anti-reverse pipe is matched with the through hole in the inside of the base and the inner wall of the conical ring groove, and the inside of the sealing element is attached to the outer wall of the conical cover, so that the sealing element can seal the outer wall of the conical cover, and the non-return effect of the check valve is improved.
[0012] Further, the outer wall of the limiting plate is movably connected in the inside of the limiting groove, the top end of the spring body is fixedly connected to the inner wall top end of the limiting groove, the bottom end of the conical spring is movably connected to the top end outer wall of the conical cover, and the top end of the limiting pipe extends to the inside of the conical pipe.
[0013] Through the mutual cooperation of the limiting groove, the limiting plate and the spring body, the anti-reverse pipe and the conical cover can be limited.
[0014] The utility model discloses the beneficial effect is:
[0015] 1. The low temperature check valve of industrial pipeline prevents medium reverse flow, through the setting of anti-reverse structure, when medium enters through the bottom end of anti-reverse pipe, then flows out through the water outlet hole of anti-reverse pipe middle part, this can avoid the liquid straight pass state in check valve, this can prevent medium from flowing phenomenon, and through the setting of sealing assembly, the outer wall of anti-reverse pipe and conical cover and water outlet hole can be sealed, so that medium cannot flow reversely, prevent the medium reverse flow phenomenon in valve body, improve the check effect of check valve.
[0016] 2. The low temperature check valve of industrial pipeline prevents medium reverse flow, through the setting of sealing assembly, when check valve works, medium enters through one end of water inlet pipe, then enters the inside of anti-reverse pipe and causes certain propelling force to conical cover, makes conical cover move upwards through the limiting plate and propels spring body and conical spring, makes the top end of anti-reverse pipe move to the inside of conical annular groove, makes anti-reverse pipe connect with the inside of conical annular groove through water outlet hole, so that the medium in the inside of anti-reverse pipe can enter the inside of conical annular groove through water outlet hole, then enters the channel in valve body through conical annular groove, conical sealing ring and rubber ring and continues to flow, then flows out from the upper end through the inside of flow guide hole, conical pipe and connecting head when medium stops conveying, the propelling force generated by medium disappears, and conical cover and anti-reverse pipe restore original position under the action of spring body and conical spring, prevent reverse flow. DRAWINGS
[0017] In order to more clearly illustrate the technical scheme in the embodiment of the utility model or prior art, the following will be briefly introduced the drawing used in the embodiment description or prior art.
[0018] Figure 1 It is structure schematic view of the utility model;
[0019] Figure 2 It is structure cross section view of the utility model;
[0020] Figure 3 It is structure cross section front view of the utility model;
[0021] Figure 4 It is anti-reverse structure schematic view of the utility model.
[0022] Explanation of reference signs: 1, valve body; 2, connecting head; 21, internal thread; 3, water inlet pipe; 31, external thread; 4, annular groove; 5, limiting groove; 6, anti-reverse structure; 61, anti-reverse pipe; 62, conical cover; 63, water outlet hole; 64, limiting plate; 65, spring body; 66, limiting pipe; 67, flow guide hole; 68, sealing assembly; 681, base; 682, through hole; 683, conical ring groove; 684, limiting ring groove; 685, sealing element; 686, elastic ring; 687, conical sealing ring; 688, clamping groove; 689, rubber ring; 7, conical pipe; 8, conical spring. DETAILED DESCRIPTION
[0023] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model.
[0024] Referring to Figures 1-3 As shown in the figure, an industrial pipeline medium anti-reverse low temperature check valve, comprising a valve body 1, the top end of the valve body 1 is fixedly connected with a connecting head 2, the inside of the connecting head 2 is provided with an internal thread 21, the bottom end of the valve body 1 is fixedly connected with a water inlet pipe 3, the outer wall of the water inlet pipe 3 is provided with an external thread 31, the inside of the valve body 1 is provided with an annular groove 4 at the center, the inside of the valve body 1 is provided with a limiting groove 5 close to the annular groove 4, the inside of the valve body 1 is provided with an anti-reverse structure 6, the inside of the valve body 1 is fixedly installed with a conical pipe 7 at the top end of the inner wall close to the annular groove 4, and the outer wall of the conical pipe 7 is sleeved with a conical spring 8.
[0025] Referring to Figures 2-4 As shown in the figure, the anti-reverse structure 6 comprises an anti-reverse pipe 61, a conical cover 62, a water outlet hole 63, a limiting plate 64, a spring body 65, a limiting pipe 66, a flow guide hole 67 and a sealing assembly 68, the outer wall of the anti-reverse pipe 61 is movably connected in the inside of the valve body 1 and the water inlet pipe 3, the top end of the anti-reverse pipe 61 is fixedly connected with the conical cover 62, the outer wall of the anti-reverse pipe 61 is provided with the water outlet hole 63, the outer wall of the conical cover 62 is fixedly connected with the limiting plate 64, the upper surface of the limiting plate 64 is fixedly connected with the spring body 65, the top end outer wall of the conical cover 62 is fixedly connected with the limiting pipe 66, the outer wall of the limiting pipe 66 is provided with a plurality of flow guide holes 67 arranged in a ring, and the outer wall of the anti-reverse pipe 61 is provided with the sealing assembly 68; through the setting of the anti-reverse structure 6, when the medium enters through the bottom end of the anti-reverse pipe 61, then flows out through the water outlet hole 63 in the middle of the anti-reverse pipe 61, which can avoid the straight-through state of the liquid in the check valve, which can prevent the medium from flowing backward, and through the setting of the sealing assembly 68, the outer wall of the anti-reverse pipe 61 and the conical cover 62 and the water outlet hole 63 can be sealed, so that the medium cannot flow backward, preventing the medium in the valve body 1 from flowing backward, and improving the check effect of the check valve.
[0026] Referring to Figures 2-4As shown, the sealing assembly 68 comprises a base 681, a through hole 682, a tapered ring groove 683, a limiting ring groove 684, a sealing piece 685, an elastic ring 686, a tapered sealing ring 687, a clamping groove 688 and a rubber ring 689, the outer wall of the base 681 is fixedly connected to the inner wall of the annular groove 4, the bottom end of the base 681 is provided with the through hole 682, the top end of the base 681 is provided with the tapered ring groove 683, the inside of the base 681 close to the tapered ring groove 683 is provided with the limiting ring groove 684, the inside of the limiting ring groove 684 is fixedly connected with the sealing piece 685, the top end of the base 681 is fixedly connected with the elastic ring 686, the top end of the base 681 is fixedly connected with the tapered sealing ring 687, the bottom end of the tapered sealing ring 687 is provided with the clamping groove 688, and the top end of the tapered sealing ring 687 is fixedly connected with the rubber ring 689; through the arrangement of the sealing assembly 68, when the check valve works, the medium enters through one end of the water inlet pipe 3, then enters the inside of the anti-reverse pipe 61 to cause a certain pushing force to the conical cover 62, so that the conical cover 62 pushes the spring body 65 and the conical spring 8 to move upward through the limiting plate 64, so that the top end of the anti-reverse pipe 61 moves to the inside of the tapered ring groove 683, so that the anti-reverse pipe 61 is connected with the inside of the tapered ring groove 683 through the water outlet hole 63, so that the medium in the anti-reverse pipe 61 can enter the inside of the tapered ring groove 683 through the water outlet hole 63, then flow into the channel in the inside of the valve body 1 through the tapered ring groove 683, the tapered sealing ring 687 and the rubber ring 689, and then flow out from the upper end through the inside of the flow guide hole 67, the tapered pipe 7 and the connecting head 2, when the medium stops conveying, the pushing force generated by the medium disappears, and the conical cover 62 and the anti-reverse pipe 61 return to the original position under the action of the spring body 65 and the conical spring 8, thereby preventing backflow.
[0027] Referring to Figure 4 As shown, the inside of the clamping groove 688 is clamped with the elastic ring 686, the inside of the tapered sealing ring 687 is movably connected with the conical cover 62, and the inside of the rubber ring 689 is movably connected with the conical cover 62; through the above technical scheme, the elastic ring 686 has elasticity, when the medium stops conveying, the pushing force generated by the medium disappears, and the conical cover 62 and the anti-reverse pipe 61 return to the original position under the action of the spring body 65 and the conical spring 8, the elastic ring 686 can tighten the bottom end of the tapered sealing ring 687, so that the sealing ring 687 can seal the outer wall of the conical cover 62, thereby improving the check effect of the check valve.
[0028] Referring to Figure 3 , 4As shown, the base 681 is internally connected to an anti-reverse tube 61 and a conical cover 62, and the outer wall of the sealing element 685 is fitted against the outer wall of the conical cover 62. By adopting the above technical solution, the outer walls of the conical cover 62 and the anti-reverse tube 61 are adapted to the inner walls of the through hole 682 and the conical annular groove 683 inside the base 681. At the same time, the interior of the sealing element 685 is fitted against the outer wall of the conical cover 62. This allows the sealing element 685 to seal the outer wall of the conical cover 62, thereby improving the check valve's check-back effect.
[0029] Reference Figure 2 , 3 As shown, the outer wall of the limiting plate 64 is movably connected to the inside of the limiting groove 5, the top end of the spring body 65 is fixedly connected to the top end of the inner wall of the limiting groove 5, the bottom end of the conical spring 8 is movably connected to the top outer wall of the conical cover 62, and the top end of the limiting tube 66 extends into the inside of the conical tube 7. By adopting the above technical solution, the mutual cooperation of the limiting groove 5, the limiting plate 64 and the spring body 65 can limit the anti-reverse tube 61 and the conical cover 62.
[0030] In use, the inlet pipes 3 and connectors 2 at both ends of the valve body 1 are connected to the middle of an industrial pipeline. When the check valve operates, the medium enters through one end of the inlet pipe 3 and then enters the anti-backflow pipe 61, creating a certain pushing force on the conical cover 62. This causes the conical cover 62 to push the spring body 65 and the conical spring 8 upward through the limiting plate 64, moving the top of the anti-backflow pipe 61 into the conical annular groove 683. This connects the anti-backflow pipe 61 with the interior of the conical annular groove 683 through the outlet hole 63. This allows the medium inside the anti-backflow pipe 61 to enter the conical annular groove 683 through the outlet hole 63, and then continue to flow through the conical annular groove 683, the conical sealing ring 687, and the rubber ring 689 into the channel inside the valve body 1. Then, it flows out from the top through the guide hole 67, the conical pipe 7, and the connector 2. When the medium stops being transported, the driving force generated by the medium disappears, and under the action of the spring body 65 and the conical spring 8, the conical cover 62 and the anti-backflow pipe 61 return to their original positions to prevent backflow.
[0031] The above description of the disclosed embodiments enables those skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention is not to be limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims
1. A cryogenic check valve for preventing backflow of a medium in an industrial pipeline, comprising a valve body (1), characterized in that: The top end of the valve body (1) is fixedly connected with a connecting head (2), an internal thread (21) is formed in the connecting head (2), the bottom end of the valve body (1) is fixedly connected with a water inlet pipe (3), an external thread (31) is formed in the outer wall of the water inlet pipe (3), an annular groove (4) is formed in the inner center of the valve body (1), a limiting groove (5) is formed in the inner wall of the valve body (1) close to the annular groove (4), an anti-reverse structure (6) is arranged in the inner wall of the valve body (1), a conical pipe (7) is fixedly installed on the inner wall top end of the valve body (1) close to the annular groove (4), and a conical spring (8) is sleeved on the outer wall of the conical pipe (7). The anti-reverse structure (6) comprises an anti-reverse pipe (61), a conical cover (62), a water outlet hole (63), a limiting plate (64), a spring body (65), a limiting pipe (66), a flow guide hole (67) and a sealing assembly (68), the outer wall of the anti-reverse pipe (61) is movably connected in the inner wall of the valve body (1) and the water inlet pipe (3), the top end of the anti-reverse pipe (61) is fixedly connected with the conical cover (62), the outer wall of the anti-reverse pipe (61) is provided with the water outlet hole (63), the outer wall of the conical cover (62) is fixedly connected with the limiting plate (64), the upper surface of the limiting plate (64) is fixedly connected with the spring body (65), the top end outer wall of the conical cover (62) is fixedly connected with the limiting pipe (66), a plurality of flow guide holes (67) are annularly arranged on the outer wall of the limiting pipe (66), and the outer wall of the anti-reverse pipe (61) is provided with the sealing assembly (68).
2. The low temperature check valve for preventing backflow of medium in an industrial pipeline according to claim 1, characterized by: The sealing assembly (68) comprises a base (681), a through hole (682), a conical ring groove (683), a limiting ring groove (684), a sealing element (685), an elastic ring (686), a conical sealing ring (687), a clamping groove (688) and a rubber ring (689), the outer wall of the base (681) is fixedly connected to the inner wall bottom of the annular groove (4), the bottom end of the base (681) is provided with the through hole (682), the top end of the base (681) is provided with the conical ring groove (683), the limiting ring groove (684) is formed in the inner wall of the base (681) close to the conical ring groove (683), the inner wall of the limiting ring groove (684) is fixedly connected with the sealing element (685), the top end of the base (681) is fixedly connected with the elastic ring (686), the top end of the base (681) is fixedly connected with the conical sealing ring (687), the bottom end of the conical sealing ring (687) is provided with the clamping groove (688), and the top end of the conical sealing ring (687) is fixedly connected with the rubber ring (689).
3. The low temperature check valve for preventing backflow of medium in an industrial pipeline according to claim 2, characterized in that: The inner wall of the clamping groove (688) is clamped with the elastic ring (686), the inner wall of the conical sealing ring (687) is movably connected with the conical cover (62), and the inner wall of the rubber ring (689) is movably connected with the conical cover (62).
4. The low temperature check valve for preventing backflow of medium in an industrial pipeline according to claim 3, characterized in that: The inner wall of the base (681) is movably connected with the anti-reverse pipe (61) and the conical cover (62), and the outer wall of the sealing element (685) is attached to the outer wall of the conical cover (62).
5. The low temperature check valve for preventing backflow of medium in an industrial pipeline according to claim 1, characterized in that: The outer wall of the limiting plate (64) is movably connected in the inside of the limiting groove (5), the top end of the spring body (65) is fixedly connected in the top end of the inner wall of the limiting groove (5), the bottom end of the conical spring (8) is movably connected in the top end outer wall of the conical cover (62), and the top end of the limiting tube (66) extends to the inside of the conical tube (7).