Double-shaft-rod type check valve
By designing a dual-axis check valve and using a mounting platform and limiting protrusion to fix the rocker arm bushing, the problem of increased valve body height caused by the hoisting design of existing swing check valves is solved, achieving cost reduction and performance maintenance.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- NANTONG POWER STATION VALVE
- Filing Date
- 2025-04-29
- Publication Date
- 2026-04-28
AI Technical Summary
The existing swing check valve has an increased internal height due to its hoisting design, which increases casting costs.
The valve body adopts a dual-axis design, which sets two mounting platforms and shafts in the valve body. The rocker arm bushing is installed between the two mounting platforms. Combined with the limiting protrusion and the shaft protrusion, the rocker arm bushing is limited and fixed, thereby reducing the height of the valve body.
This effectively reduces the internal height of the valve body, decreases casting costs, enhances product competitiveness, and ensures valve performance.
Smart Images
Figure CN224174595U_ABST
Abstract
Description
Technical Field
[0001] This utility model belongs to the field of check valve technology, specifically a double-axis rod type check valve. Background Technology
[0002] Swing check valves are mainly used in pipelines where the medium flows in one direction. For example... Figure 1 As shown, the existing cast swing check valve includes a valve body 1' and a rocker assembly. The inner wall of the valve body 1' is provided with a boss 2'. The rocker assembly is mounted on the boss 2' by a bracket 3' that is integrally inverted U-shaped. The upper side of the bracket 3' is suspended on the boss 2' and fixedly connected to the boss 2' by fastening bolts. The lower side extends downward and is provided with a horizontally arranged rocker shaft hole. The rocker shaft 4' of the rocker assembly is inserted into the rocker shaft hole.
[0003] To avoid the boss 2' and fastening bolts, the rocker shaft 4' needs to be located below the boss 2'. The design height of the hanging plate must meet the connection between its upper part and the boss 2' and the setting of the rocker shaft hole at the bottom. However, the valve body 1' needs to have enough space to avoid the height of the bracket 3'. Therefore, the internal height of the valve body 1' will increase accordingly to obtain this space, which will increase the casting cost of the valve body 1'. Therefore, it is urgent to design a swing check valve to solve the above problems. Utility Model Content
[0004] The purpose of this invention is to provide a double-axis check valve that reduces the height of the valve body's central cavity.
[0005] To solve the above-mentioned technical problems, this utility model provides a double-axis check valve, including a valve body, a mounting part and a rocker arm bushing. The mounting part has two mounting platforms and two shafts. The two mounting platforms are respectively fixed to the inner wall of the valve body. The two mounting platforms have mounting holes formed on opposite sides. One end of each of the two shafts is detachably installed in the two mounting holes, and the two shafts are coaxial after installation. The two ends of the rocker arm bushing are respectively sleeved on the two shafts.
[0006] Furthermore, a limiting protrusion is detachably installed on the side of each shaft, and after the rocker arm sleeve is fitted onto the two shafts, the rocker arm sleeve is confined between the two limiting protrusions.
[0007] Furthermore, the limiting protrusion is mounted on the corresponding shaft via a limiting mounting unit, which includes a limiting hole and a limiting rod. The limiting hole is formed on the side of the corresponding shaft, and the limiting rod is threadedly connected to the limiting hole. The limiting protrusion is fixed on the limiting rod and located outside the limiting hole.
[0008] Furthermore, the shaft has a planar section, one side of which has a plane, and a limiting hole is formed on the plane.
[0009] Furthermore, the shaft is mounted on the mounting platform via a shaft mounting unit, which includes a shaft protrusion fixed to the side of the shaft, and the shaft protrusion abuts against the corresponding mounting platform.
[0010] Furthermore, the shaft includes an insertion section inserted into a corresponding mounting hole and a shaft body located outside the mounting hole. The shaft protrusion is provided at the end of the shaft body facing the insertion section, and the gap between the two shafts is not less than the axial length of the insertion section.
[0011] Furthermore, the shaft mounting unit also includes an internal thread formed on the inner wall of the mounting hole and an external thread formed at one end of the shaft, with the shaft threadedly connected to the corresponding mounting hole.
[0012] Furthermore, the shaft has a planar segment, the side of which has at least a pair of mutually parallel planes, the planar segment constituting a screwing segment for screwing.
[0013] Furthermore, the shaft is mounted on the mounting platform via a shaft mounting unit, which includes a shaft protrusion fixed to the side of the shaft and a limiting protrusion forming the shaft protrusion. Its two sides are respectively used to abut against the mounting platform and the rocker arm bushing.
[0014] Furthermore, the mounting platform and valve body are integrated into one structure.
[0015] The beneficial effects of this utility model are as follows: By using two integrally cast mounting platforms for the valve body, the rocker shaft is divided into two shafts. During installation, one end of the shaft is first inserted into one mounting platform, and the bushing is fitted onto that shaft. Then, the other end of the shaft is inserted into the other mounting platform. The rocker bushing is then moved so that both ends of the rocker bushing are fitted onto the two shafts respectively, thus realizing the installation of the rocker bushing. That is, the rocker bushing is installed between the two mounting platforms, replacing the hoisting design in the prior art. This effectively shortens the height of the rocker bushing mounting components, thereby reducing the internal height of the valve body accordingly. While ensuring the valve's performance, this effectively reduces the casting cost of the valve body and enhances the product's competitiveness.
[0016] The limiting protrusions limit the movement of the rocker arm bushing, preventing the bushing from moving violently along its axial direction during valve operation.
[0017] By setting a flat surface on the side of the shaft, it is easier to machine the limiting hole on the side of the shaft. At the same time, it also ensures that the limiting protrusion can fit more closely with the side (flat surface) of the shaft after the stud is screwed in. In addition, the flat surface can be used as the screwing surface of the wrench, making it easier to screw the shaft into the mounting hole with a wrench.
[0018] The rocker arm shaft is limited by a limiting protrusion, preventing it from flying out of the mounting hole due to external force during valve operation. Furthermore, the combination of the limiting protrusion and the shaft protrusion ensures the shaft is axially fixed relative to the mounting platform, resulting in a simple structure and convenient installation. Attached Figure Description
[0019] To more clearly illustrate the technical solution of this utility model, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.
[0020] Figure 1 This is a cross-sectional view of a dual-axis check valve in the prior art;
[0021] Figure 2 This is a top view of the double-axis rod type check valve in Embodiment 1 of this utility model;
[0022] Figure 3 This is the double-axis rod type check valve in Embodiment 1 of this utility model. Figure 2 A cross-sectional view along line AA;
[0023] Figure 4 This is a front view of the double-axis rod type check valve in Embodiment 1 of this utility model;
[0024] Figure 5 This is the double-axis rod type check valve in Embodiment 1 of this utility model. Figure 4 A cross-sectional view of the BB line;
[0025] Figure 6 yes Figure 5 A magnified view of part C in the middle;
[0026] Figure 7 This is a schematic diagram of the shaft structure in Embodiment 1 of this utility model;
[0027] Figure 8 This is a front view of the double-axis rod check valve in Embodiment 2 of this utility model;
[0028] Figure 9 This is the double-axis rod type check valve in Embodiment 2 of this utility model. Figure 8 A cross-sectional view of the DD line;
[0029] Figure 10 yes Figure 9 A magnified view of part E in the middle;
[0030] Figure 11 This is a schematic diagram of the shaft structure in Embodiment 2 of this utility model; and
[0031] Figure 12 This is a schematic diagram showing the fit between the shaft, the mounting platform, and the rocker arm bushing in Embodiment 3 of this utility model.
[0032] In the diagram: 1' is the valve body, 2' is the boss, 3' is the bracket, 4' is the rocker shaft, 1 is the valve body, 2 is the rocker, 21 is the rocker bushing, 3 is the valve disc, 4 is the mounting platform, 41 is the mounting hole, 42 is the internal thread, 5 is the shaft, 51 is the shaft protrusion, 52 is the insertion section, 53 is the shaft body, 54 is the plane, 55 is the limiting hole, 56 is the external thread, and 6 is the hexagonal screw. Detailed Implementation
[0033] The technical solutions in the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.
[0034] Example 1
[0035] The following will describe a specific embodiment of this utility model and its appendix. Figure 2-6 To explain in detail, this embodiment takes a cast swing check valve as an example, but the solution of this utility model is not limited to cast check valves, and can also be used for forged swing check valves, etc.
[0036] Figure 2 This is a top view of the double-axis rod type check valve in Embodiment 1 of this utility model; Figure 3 This is the double-axis rod type check valve in Embodiment 1 of this utility model. Figure 2 A cross-sectional view along line AA; Figure 4 This is a front view of the double-axis rod type check valve in Embodiment 1 of this utility model; Figure 5 This is the double-axis rod type check valve in Embodiment 1 of this utility model. Figure 4 A cross-sectional view of the BB line; Figure 6 yes Figure 5 A magnified view of part C in the middle; Figure 7 This is a schematic diagram of the shaft structure in Embodiment 1 of this utility model.
[0037] like Figure 2-7 As shown, a dual-axis rod type check valve of this embodiment includes a valve body 1, a rocker arm assembly, and a mounting part.
[0038] The valve body 1 is a cast valve body; the rocker assembly includes a rocker arm 2 and a valve disc 3. A rocker arm bushing 21 is fixedly mounted on one end of the rocker arm 2, and the rocker arm bushing 21 is rotatably mounted inside the valve body 1. The valve disc 3 is mounted on the other end of the rocker arm 2. This is prior art and will not be described in detail here.
[0039] The mounting section includes two mounting platforms 4, two shafts 5, two shaft mounting units, two limiting protrusions, and two limiting mounting units.
[0040] Two mounting platforms 4 are respectively fixed to the inner wall of the valve body 1, and the two mounting platforms 4 and the valve body 1 are an integral structure formed by casting. The distance between the two mounting platforms 4 is at least greater than the sum of the axial length of the rocker arm bushing 21 and the axial length of the shortest shaft 5 among the two shafts 5. Preferably, the distance between the two mounting platforms 4 is greater than the sum of the axial length of the rocker arm bushing 21 and the axial length of either shaft 5. Mounting holes 41 are formed on opposite sides of the two mounting platforms 4.
[0041] One end of each of the two shafts 5 is detachably installed in one of the two mounting holes 41, and the two shafts 5 are coaxially arranged. The two ends of the rocker arm sleeve 21 are respectively sleeved on the two shafts 5. The rocker arm sleeve 21 is rotatably installed in the valve body 1 through the two shafts 5.
[0042] The two shafts 5 can be installed on the two mounting platforms 4 using different installation methods, as long as the shafts 5 can be detachably installed into the mounting holes 41. These installation methods can include inserting the shafts 5 into the mounting holes 41 and then fixing them by spot welding, etc. In this embodiment, the two shafts 5 are installed using the same installation method, that is, each shaft 5 is installed on its corresponding mounting platform 4 through a shaft mounting unit.
[0043] The shaft mounting unit includes a shaft protrusion 51 fixed to the side of the corresponding shaft 5, which abuts against the corresponding mounting platform 4. The shaft 5 includes an insertion section 52 inserted into a corresponding mounting hole 41 and a shaft body 53 located outside the mounting hole 41. The shaft protrusion 51 is located on the outer side of the end of the shaft body 53 facing the insertion section 52. The gap between the two shafts 5 is not less than the axial length of the insertion section 52. "The gap between the two shafts 5 is not less than the axial length of the insertion section 52" means that the gap between the two shafts 5 is not less than the axial length of the shortest insertion section 52 among the two insertion sections 52. Preferably, the gap between the two shafts 5 is not less than the axial length of either insertion section 52.
[0044] The shaft protrusion 51 can be a component installed on the side of the shaft 5. For example, the shaft protrusion 51 can be a shaft nut installed on the outside of the shaft 5 via a threaded connection. Furthermore, the two shaft protrusions 51 can have different structures, as long as the shaft protrusion 51 can be axially fixed to the shaft 5 and abut against the mounting platform 4. In this embodiment, the shaft protrusion 51 is integrally formed with the shaft 5. As a preferred embodiment of this utility model, the diameter of the shaft body 53 is larger than the diameter of the insertion section 52, thereby forming a stepped surface at the connection between the shaft body 53 and the insertion section 52, which abuts against the corresponding mounting platform 4. The portion of the shaft body 53 protruding from the insertion section 52 constitutes the shaft protrusion 51.
[0045] Two limiting protrusions are detachably mounted on the sides of the two shafts 5. After the rocker arm sleeve 21 is fitted onto the two shafts 5, the rocker arm sleeve 21 is confined between the two limiting protrusions.
[0046] The two limiting protrusions can be installed on the two mounting platforms 4 using different installation methods. In this embodiment, the two limiting protrusions are installed using the same installation method, that is, each limiting protrusion is installed on the corresponding shaft 5 using a limiting installation unit. The limiting installation unit includes a limiting hole 55 and a limiting rod. The limiting hole 55 is formed on the side of the corresponding shaft body 53, and the limiting rod is threadedly connected to the limiting hole 55. The limiting protrusion is fixed on the limiting rod and located outside the limiting hole 55. The limiting protrusion and the limiting rod are an integral structure. Specifically, a hexagonal screw 6 is installed on the shaft 5 to limit the rocker arm bushing 21. The limiting protrusion is the cap portion of the hexagonal screw 6, and the limiting rod is the stud portion of the hexagonal screw 6. Preferably, the shaft body 53 has a planar section, and one side of the planar section has a plane 54. The limiting hole 55 is opened on the plane 54. The two limiting protrusions can also have different structures, as long as the limiting protrusion can be axially fixed to the shaft 5 and can limit the rocker sleeve 21. For example, one limiting protrusion adopts the above structure and is installed on the corresponding shaft 5 through the above limiting installation unit, and the other limiting protrusion is a limiting nut that is threaded to the corresponding shaft 5.
[0047] In this embodiment of the dual-axis check valve, the installation process of the rocker assembly into the valve body 1 is as follows: First, insert the end of one shaft 5 into a mounting platform 4 until the shaft protrusion 51 on it abuts against the mounting platform 4; second, fit the rocker sleeve 21 onto the shaft 5 and push the rocker sleeve 21 toward the mounting platform 4 so that there is sufficient clearance between the rocker sleeve 21 and the other mounting platform 4 for the other shaft 5 to extend into; third, insert one end of the other shaft 5 into the other mounting platform 4 until the shaft protrusion 51 on it abuts against the mounting platform 4; then, move the rocker sleeve 21 between the two limiting holes 55; finally, screw the limiting protrusion into the limiting hole 55 until the limiting protrusion abuts against the plane 54 on the side of the rocker 2.
[0048] Example 2
[0049] In this second embodiment, the parts that are the same as in the first embodiment are numbered the same.
[0050] Figure 8 This is a front view of the double-axis rod check valve in Embodiment 2 of this utility model; Figure 9 This is the double-axis rod type check valve in Embodiment 2 of this utility model. Figure 8 A cross-sectional view of the DD line; Figure 10 yes Figure 9 A magnified view of part E in the middle; and Figure 11 This is a schematic diagram of the shaft structure in Embodiment 2 of this utility model.
[0051] like Figures 8 to 11 As shown, the difference between this embodiment 2 and embodiment 1 is that, in addition to the shaft protrusion 51, the shaft mounting unit also includes an internal thread 42 formed on the inner wall of the mounting hole 41 and an external thread 56 formed at one end of the shaft 5. The shaft 5 is threadedly connected to the corresponding mounting hole 41.
[0052] Furthermore, the shaft body 53 also has a screwing section, the side of which has at least a pair of parallel planes 54 for engaging with a wrench to screw the shaft 5 into the mounting hole 41. Preferably, the screwing section coincides with the plane section, and the limiting hole 55 is formed on one of the planes 54 of the screwing section.
[0053] In Embodiment 1, the axial fixation of the shaft 5 on the mounting platform 4 is achieved by the limiting protrusion and the shaft protrusion 51. Compared with Embodiment 1, in Embodiment 2, the circumferential fixation of the shaft 5 on the mounting platform 4 is achieved by the threaded connection between the shaft 5 and the mounting hole 41, which avoids the end of the shaft 5 facing the rocker sleeve 21 from tilting downward under the gravity of the rocker sleeve 21, causing the rocker sleeve 21 to jam when rotating relative to the shaft 5.
[0054] Example 3
[0055] In this third embodiment, the parts that are the same as in the first embodiment are numbered the same.
[0056] Figure 12 This is a schematic diagram showing the fit between the shaft, the mounting platform, and the rocker arm bushing in Embodiment 3 of this utility model.
[0057] like Figure 12 As shown, the difference between this embodiment three and embodiment one is that the limiting protrusion is installed on the shaft 5 by a stud, and this limiting protrusion constitutes the shaft protrusion 51. Its two sides are respectively used to abut against the mounting platform 4 and the rocker arm bushing 21 to limit the shaft 5 and the rocker arm bushing 21. The limiting protrusion and the stud are integrally formed hexagonal socket head cap screws. In other embodiments, the limiting protrusion and the stud can also be fixedly connected by other methods. In this embodiment, when the limiting protrusion is installed on the shaft 5, there is a small gap of about 1 mm between the limiting protrusion and the rocker arm bushing 21 and the corresponding mounting platform 4, to avoid large frictional forces between the limiting protrusion and the mounting platform 4 or the rocker arm bushing 21 when the stud is rotated.
[0058] The above-disclosed embodiments are merely preferred embodiments of the present utility model and should not be construed as limiting the scope of the present utility model. Therefore, any equivalent variations made in accordance with the claims of the present utility model shall still fall within the scope of the present utility model.
Claims
1. A double-axis rod type check valve, characterized in that, The device includes a valve body (1), a mounting part, and a rocker arm bushing (21). The mounting part has two mounting platforms (4) and two shafts (5). The two mounting platforms (4) are respectively fixed to the inner wall of the valve body (1). The two mounting platforms (4) have mounting holes (41) formed on opposite sides. One end of each of the two shafts (5) is detachably installed in the two mounting holes (41), and the two shafts (5) are coaxial after installation. The two ends of the rocker arm bushing (21) are respectively sleeved on the two shafts (5).
2. The double-axis check valve according to claim 1, characterized in that, Each of the shafts (5) has a detachable limiting protrusion mounted on its side. After the rocker arm sleeve (21) is fitted onto the two shafts (5), the rocker arm sleeve (21) is confined between the two limiting protrusions.
3. A double-axis rod type check valve according to claim 2, characterized in that, The limiting protrusion is mounted on the corresponding shaft (5) by a limiting mounting unit. The limiting mounting unit includes a limiting hole (55) and a limiting rod. The limiting hole (55) is formed on the side of the corresponding shaft (5). The limiting rod is threadedly connected to the limiting hole (55). The limiting protrusion is fixed on the limiting rod and located outside the limiting hole (55).
4. The double-axis check valve according to claim 3, characterized in that, The shaft (5) has a planar section, one side of which has a plane (54), and the limiting hole (55) is formed on the plane (54).
5. The double-axis check valve according to any one of claims 2 to 4, characterized in that, The shaft (5) is mounted on the mounting platform (4) by a shaft mounting unit. The shaft mounting unit includes a shaft protrusion (51) fixed to the side of the shaft (5). The shaft protrusion (51) abuts against the corresponding mounting platform (4).
6. The double-axis check valve according to claim 5, characterized in that, The shaft (5) includes an insertion section (52) inserted into the corresponding mounting hole (41) and a shaft body (53) located outside the mounting hole (41). The shaft protrusion (51) is provided at the end of the shaft body (53) facing the insertion section (52). The gap between the two shafts (5) is not less than the axial length of the insertion section (52).
7. The double-axis check valve according to claim 5, characterized in that, The shaft mounting unit further includes an internal thread (42) formed on the inner wall of the mounting hole (41) and an external thread (56) formed at one end of the shaft (5), the shaft (5) being threadedly connected to the corresponding mounting hole (41).
8. The double-axis check valve according to claim 7, characterized in that, The shaft (5) has a planar segment, the side of which has at least a pair of mutually parallel planes (54), the planar segment constituting a screwing segment for screwing.
9. The double-axis check valve according to any one of claims 2 to 4, characterized in that, The shaft (5) is mounted on the mounting platform (4) by a shaft mounting unit. The shaft mounting unit includes a shaft protrusion (51) fixed to the side of the shaft (5). The limiting protrusion constitutes the shaft protrusion (51), and its two sides are respectively used to abut against the mounting platform (4) and the rocker arm bushing (21).
10. The double-axis check valve according to claim 1, characterized in that, The mounting platform (4) and the valve body (1) are an integral structure.