Valve clack counterweight structure of normally-open axial-flow check valve
By using a structure connected to the tail of the guide rod in the axial flow check valve, the problem of forward shift of the valve center of gravity is solved, and the smoothness of the valve opening and closing and the sealing performance are improved, avoiding the risk of small parts falling into the pipeline system.
Patent Information
- Application Number
- CN202422608786.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-10-28
- Publication Date
- 2025-07-29
- Estimated Expiration
- 2034-10-28
AI Technical Summary
When the conventional axial flow check valve is closed, the center of gravity of the valve disc moves forward, resulting in poor opening and closing, poor sealing performance, and the risk of small parts loose and falling into the pipeline system.
The center of gravity of the valve disc assembly is adjusted to avoid forward movement and fixed connection of the center of gravity of the valve disc assembly.
Ensure smooth opening and closing of the valve disc, improve sealing performance, prevent small parts from loosening, and ensure the safe and reliable operation of the pipeline system.
Smart Images
Figure CN223165102U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of valves, and particularly relates to a valve flap weight structure of a normally open axial flow check valve. Background Art
[0002] The axial flow check valve is a high-performance check valve, which has the characteristics of timely response, anti-water hammer, and small pressure loss. There are relatively high requirements for the opening and closing action performance, opening performance, and sealing performance of the check valve. Compared with the axial flow check valve in the conventional field, the working conditions of the axial flow check valve in the nuclear power field are generally more demanding, and the performance requirements and safety requirements are also higher.
[0003] The structure of the conventional axial flow check valve usually faces the problem that the center of gravity of the valve flap moves forward during closing, resulting in the drooping phenomenon. The appearance of the drooping phenomenon is likely to cause problems such as unsmooth opening and closing actions of the valve flap, poor sealing performance, large opening resistance, and even loss of specified functions.
[0004] At present, most of the conventional practices are to set weight components at the end of the valve flap to address the problem of the forward movement of the center of gravity of the valve flap. When solving the problem of the center of gravity configuration of the valve flap, it is necessary to take into account the reliability of the structural design and eliminate the risk that small internal components of the valve fall into the pipeline system, providing a reliable guarantee for the safe and reliable operation of the pipeline system. Summary of the Utility Model
[0005] In view of this, the utility model provides a valve flap weight structure of a normally open axial flow check valve to solve the problem of how to prevent small internal components of the valve from falling into the pipeline system when solving the problem of the center of gravity configuration of the valve flap.
[0006] In a first aspect, the utility model provides a valve flap weight structure of a normally open axial flow check valve, including:
[0007] A weight block, on which a groove is provided, and a pin hole is provided on the side wall of the groove; the weight block is adapted to be sleeved on the tail of the guide rod in the valve flap assembly through the groove, and a pin slot adapted to the pin hole is provided at the tail of the guide rod;
[0008] An anti-rotation pin, which is adapted to pass through the pin hole and the pin slot;
[0009] A spring seat, which is sleeved on the guide rod. One end of the spring seat close to the weight block has a receiving cavity, and the receiving cavity is configured to cover the outer surface of the weight block with the pin hole, and the anti-rotation pin is located in the receiving cavity.
[0010] In an optional embodiment, an axial limiting structure is provided between the weight block and the tail of the guide rod to limit the movement of the weight block in the axial direction of the guide rod.
[0011] In an alternative embodiment, the axial limiting structure is an internal thread provided on the inner wall of the groove of the counterweight block and an external thread provided on the outer surface of the tail of the guiding rod.
[0012] In an alternative embodiment, the spring seat is provided with a through hole, the spring seat is sleeved on the guiding rod through the through hole, and the inner wall of the through hole is provided with an internal thread on the hole wall adapted to the external thread on the outer surface of the tail of the guiding rod.
[0013] In an alternative embodiment, the valve flap counterweight structure of the normally open axial flow check valve further includes a biasing member, the biasing member is disposed between the spring seat and the valve flap assembly, and the biasing member has a biasing force for forcing the receiving cavity in the spring seat to be sleeved on the outer surface of the counterweight block having a pin hole.
[0014] In an alternative embodiment, a step structure is provided at one end of the spring seat close to the biasing member, and the biasing member abuts against the step structure.
[0015] In an alternative embodiment, the biasing member is a spring, the spring is sleeved on the guiding rod, and one end of the spring abuts against the step structure.
[0016] In an alternative embodiment, the valve flap assembly further includes:
[0017] A support frame, connected to the valve body, the support frame is internally provided with a guiding hole; the guiding rod is inserted into the guiding hole of the support frame;
[0018] A valve flap, disposed at the front end of the guiding rod and integrally formed therewith;
[0019] Wherein, the biasing member is disposed between the support frame and the spring seat.
[0020] In an alternative embodiment, the support frame is provided with a plurality of flow channel holes, and the flow channel holes are axially opened along the guiding rod.
[0021] The valve flap counterweight structure of the normally open axial flow check valve provided by the present utility model has the following advantages:
[0022] 1. The valve flap counterweight structure of the normally open axial flow check valve provided by the present utility model includes a counterweight block, an anti-rotation pin and a spring seat. The counterweight block is provided with a groove, and a pin hole is provided on the side wall of the groove; the counterweight block is adapted to be sleeved on the tail of the guiding rod in the valve flap assembly through the groove, and a pin groove adapted to the pin hole is provided on the tail of the guiding rod; the anti-rotation pin is adapted to pass through the pin hole and the pin groove; the spring seat is sleeved on the guiding rod, one end of the spring seat close to the counterweight block has a receiving cavity, the receiving cavity is configured to cover the outer surface of the counterweight block having the pin hole, and the anti-rotation pin is located in the receiving cavity.
[0023] The valve flap counterweight structure of the normally open axial flow check valve of this structure is provided with a counterweight block at the tail of the guide rod, which is used to adjust the center of gravity of the valve flap assembly to avoid the forward movement of the center of gravity of the valve flap when the valve closes and form the phenomenon of drooping head. A groove is provided on the counterweight block. When installing the counterweight block, the connection between the counterweight block and the guide rod is realized by sleeving the groove on the tail of the guide rod. At the same time, a pin hole is provided on the side wall of the groove, and a pin groove adapted to the pin hole is provided at the tail of the guide rod. When installing the counterweight block at the tail of the guide rod, the pin hole on the side wall of the counterweight block groove is aligned with the pin groove at the tail of the guide rod, and then the anti-rotation pin is inserted into the pin hole and the pin groove to realize the fixed limit of the counterweight block and the guide rod. A spring seat is sleeved on the guide rod, and a receiving cavity is provided at one end of the spring seat close to the counterweight block. After the anti-rotation pin is inserted into the pin hole and the pin groove, the spring seat is moved until the receiving cavity of the spring seat covers the outer surface of the counterweight block with the pin hole, and at the same time the anti-rotation pin is in the receiving cavity, so as to prevent the anti-rotation pin from disengaging from the pin hole and the pin groove. Description of the Drawings
[0024] In order to more clearly illustrate the specific embodiments of the present invention or the technical solutions in the prior art, the following will briefly introduce the drawings required for use in the description of the specific embodiments or the prior art. Obviously, the drawings in the following description are some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.
[0025] Figure 1 It is a structural schematic view of the valve flap counterweight structure of the normally open axial flow check valve provided in the embodiment of the present invention.
[0026] Description of the Reference Numerals:
[0027] 1 - Counterweight block;
[0028] 2 - Anti-rotation pin;
[0029] 3 - Spring seat;
[0030] 4 - Biasing member;
[0031] 5 - Guide rod;
[0032] 6 - Support frame;
[0033] 7 - Valve flap;
[0034] 8 - Flow channel hole. Detailed Embodiments
[0035] The technical solution of the present utility model will be clearly and completely described below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.
[0036] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model 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 therefore should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance. In addition, the technical features involved in different embodiments of the present utility model described below can be combined with each other as long as they do not conflict with each other.
[0037] Embodiment
[0038] This embodiment provides a valve flap weight structure for a normally open axial flow check valve, as Figure 1 shown, including a weight block 1, an anti-rotation pin 2, and a spring seat 3. The weight block 1 is provided with a groove, and a pin hole is provided on the side wall of the groove; the weight block 1 is adapted to be sleeved on the tail of the guide rod 5 in the valve flap assembly through the groove, and a pin groove adapted to the pin hole is provided at the tail of the guide rod 5; the anti-rotation pin 2 is adapted to pass through the pin hole and the pin groove; the spring seat 3 is sleeved on the guide rod 5, and one end of the spring seat 3 close to the weight block 1 has a receiving cavity, and the receiving cavity is configured to cover the outer surface of the weight block 1 having the pin hole, and the anti-rotation pin 2 is located in the receiving cavity.
[0039] By providing a weight block 1 at the tail of the guide rod 5, it is used to adjust the center of gravity of the valve flap assembly to avoid the overall center of gravity of the valve flap 7 and the guide rod 5 moving forward when the valve is closed, resulting in a drooping phenomenon. By providing a groove on the weight block 1, when installing the weight block 1, the connection between the weight block 1 and the guide rod 5 is realized by sleeving the groove on the tail of the guide rod 5. At the same time, a pin hole is provided on the side wall of the groove, and a pin groove adapted to the pin hole is provided at the tail of the guide rod 5. When installing the weight block 1 on the tail of the guide rod 5, the pin hole on the side wall of the groove of the weight block 1 is aligned with the pin groove at the tail of the guide rod 5, and then the anti-rotation pin 2 is inserted into the pin hole and the pin groove to realize the fixed limit of the weight block 1 and the guide rod 5.
[0040] Further, by sleeving a spring seat 3 on the guide rod 5 and providing a receiving cavity at one end of the spring seat 3 close to the counterweight 1, after inserting the anti-rotation pin 2 into the pin hole and the pin slot, move the spring seat 3 until the receiving cavity of the spring seat 3 covers the outer surface of the counterweight 1 having the pin hole, and at the same time the anti-rotation pin 2 is in the receiving cavity, thereby preventing the anti-rotation pin 2 from disengaging from the pin hole and the pin slot.
[0041] In this embodiment, an axial limiting structure is provided between the counterweight 1 and the tail of the guide rod 5 to limit the axial movement of the counterweight 1 on the guide rod 5.
[0042] Specifically, the axial limiting structure is an internal thread provided on the inner wall of the groove of the counterweight 1 and an external thread provided on the outer surface of the tail of the guide rod 5.
[0043] By providing an internal thread on the inner wall of the groove of the counterweight 1 and an external thread on the outer surface of the tail of the guide rod 5, when installing the counterweight 1, connect the internal thread on the inner wall of the groove of the counterweight 1 with the external thread on the outer surface of the tail of the guide rod 5, and rotate the counterweight 1 until the pin hole on the side wall of the groove of the counterweight 1 is aligned with the pin slot at the tail of the guide rod 5. Through the thread fit between the counterweight 1 and the guide rod 5, the connection between the counterweight 1 and the guide rod 5 can be further strengthened to limit the axial movement of the counterweight 1 on the guide rod 5.
[0044] In this embodiment, the spring seat 3 is provided with a through hole, the spring seat 3 is sleeved on the guide rod 5 through the through hole, and the inner wall of the through hole is provided with a hole wall internal thread adapted to the external thread on the outer surface of the tail of the guide rod 5.
[0045] When installing the spring seat 3, align the through hole on the spring seat 3 with the guide rod 5, and by rotating the spring seat 3, connect the internal thread on the inner wall of the through hole on the spring seat 3 with the external thread on the outer surface of the tail of the guide rod 5. After inserting the anti-rotation pin 2 into the pin hole and the pin slot, rotate the spring seat 3 until the receiving cavity of the spring seat 3 covers the outer surface of the counterweight 1 having the pin hole.
[0046] In this embodiment, the valve flap counterweight structure of the normally open axial flow check valve further includes a biasing member 4, the biasing member 4 is provided between the spring seat 3 and the valve flap assembly, and the biasing member 4 has a biasing force that forces the receiving cavity in the spring seat 3 to be sleeved on the outer surface of the counterweight 1 having the pin hole.
[0047] By providing a biasing member 4 between the spring seat 3 and the valve flap assembly, the biasing member 4 can provide a biasing force for the spring seat 3, so that the spring seat 3 maintains its receiving cavity sleeved on the outer surface of the counterweight 1 having the pin hole.
[0048] Specifically, as Figure 1As shown, a stepped structure is provided at one end of the spring seat 3 close to the biasing member 4, and the biasing member 4 abuts against the stepped structure. In this embodiment, the biasing member 4 is a spring, the spring is sleeved on the guide rod 5, and one end of the spring abuts against the stepped structure.
[0049] In this embodiment, the valve flap assembly further includes a support frame 6 and a valve flap 7. The support frame 6 is connected to the valve body, and a guide hole is provided inside the support frame 6; the guide rod 5 is inserted into the guide hole of the support frame 6; the valve flap 7 is provided at the front end of the guide rod 5 and the two are of an integral structure; wherein, the biasing member 4 is arranged between the support frame 6 and the spring seat 3.
[0050] By providing the counterweight 1, the counterweight 1 causes the center of gravity of the whole formed by the valve flap 7, the guide rod 5 and the counterweight 1 to shift in the direction close to the counterweight 1, ensuring that during the opening and closing of the valve flap 7 of the axial flow check valve, the center of gravity of the whole formed by the valve flap 7, the guide rod 5 and the counterweight 1 always remains within the guide hole, avoiding the formation of a drooping phenomenon during the opening and closing of the valve flap 7, ensuring that the action during the opening and closing of the valve flap 7 is smoother, the response is more timely, and the sealing performance is more excellent.
[0051] As Figure 1 shown, a plurality of flow channel holes 8 are provided on the support frame 6, and the flow channel holes 8 are axially opened along the guide rod 5.
[0052] By providing a plurality of flow channel holes 8 on the support frame 6, which are set to three flow channel holes 8 in this embodiment, when the reverse flow medium flows in the valve body (the medium flows from left to right in Figure 1 the figure), the fluid pushes the valve flap 7 through the three flow channel holes 8, which can increase the reverse acting force of the fluid on the back of the valve flap 7 and is beneficial to the rapid closing of the valve flap 7.
[0053] Obviously, the above embodiments are only examples given clearly and are not limitations on the implementation manners. For those of ordinary skill in the art, other different forms of changes or modifications can be made on the basis of the above description. It is not necessary and impossible to list all the implementation manners here. And the obvious changes or modifications derived therefrom are still within the protection scope of the present invention.
Claims
1. The valve flap counterweight structure of a normally open axial flow check valve, characterized in that, Comprising: A counterweight (1), a groove is provided on the counterweight (1), and a pin hole is provided on the side wall of the groove; the counterweight (1) is adapted to be sleeved on the tail of the guide rod (5) in the valve flap assembly through the groove, and a pin slot adapted to the pin hole is provided at the tail of the guide rod (5); An anti-rotation pin (2), the anti-rotation pin (2) is adapted to be inserted into the pin hole and the pin slot; A spring seat (3), sleeved on the guide rod (5), one end of the spring seat (3) close to the counterweight (1) has a receiving cavity, the receiving cavity is configured to cover the outer surface of the counterweight (1) having the pin hole, and the anti-rotation pin (2) is located in the receiving cavity.
2. The valve flap counterweight structure of the normally open axial flow check valve according to claim 1, characterized in that, An axial limiting structure is provided between the counterweight (1) and the tail of the guide rod (5) to limit the axial movement of the counterweight (1) on the guide rod (5).
3. The valve flap counterweight structure of the normally open axial flow check valve according to claim 2, characterized in that, The axial limiting structure is an internal thread provided on the inner wall of the groove of the counterweight (1) and an external thread provided on the outer surface of the tail of the guide rod (5).
4. The valve flap counterweight structure of the normally open axial flow check valve according to claim 2, characterized in that, The spring seat (3) is provided with a through hole, the spring seat (3) is sleeved on the guide rod (5) through the through hole, and the inner wall of the through hole is provided with an inner thread of the hole wall adapted to the external thread on the outer surface of the tail of the guide rod (5).
5. The valve flap counterweight structure of the normally open axial flow check valve according to claim 4, characterized in that, It further includes a biasing member (4), the biasing member (4) is provided between the spring seat (3) and the valve flap assembly, and the biasing member (4) has a biasing force that forces the receiving cavity in the spring seat (3) to be sleeved on the outer surface of the counterweight (1) having the pin hole.
6. The valve flap counterweight structure of the normally open axial flow check valve according to claim 5, characterized in that, A step structure is provided at one end of the spring seat (3) close to the biasing member (4), and the biasing member (4) abuts against the step structure.
7. The valve flap counterweight structure of the normally open axial flow check valve according to claim 6, characterized in that, The biasing member (4) is a spring, the spring is sleeved on the guide rod (5), and one end of the spring abuts against the step structure.
8. The valve flap counterweight structure of the normally open axial flow check valve according to claim 7, characterized in that, The valve flap assembly further includes: A support frame (6), connected to the valve body, a guide hole is provided inside the support frame (6); the guide rod (5) is inserted into the guide hole of the support frame (6); A valve flap (7), provided at the front end of the guide rod (5) and the two are of an integral structure; Wherein, the biasing member (4) is provided between the support frame (6) and the spring seat (3).
9. The valve flap counterweight structure of the normally open axial flow check valve according to claim 8, characterized in that, A plurality of flow channel holes (8) are provided on the support frame (6), and the flow channel holes (8) are opened along the axial direction of the guide rod (5).