Swing check valve

Abstract

The utility model relates to the technical field of check valves, and particularly discloses a swing check valve which comprises a valve body, a rocker assembly and a rocker mounting portion, the rocker assembly comprises a rocker shaft, the rocker mounting portion is provided with two mounting units, each mounting unit comprises a mounting table and a mounting block which are correspondingly arranged, the mounting tables are fixed in the valve body, and the mounting blocks are fixed in the valve body. The mounting blocks are located between the two mounting tables and fixedly connected with the corresponding mounting tables, mounting holes matched with the rocker shaft are formed in the sides, away from the mounting tables, of the mounting blocks, and the two ends of the rocker shaft extend into the two mounting holes respectively. According to the swing check valve, the mounting block for mounting the rocker shaft is arranged between the two mounting tables, so that the height of the whole rocker mounting part is effectively shortened, the internal height of the valve body is correspondingly reduced, the casting cost of the valve shell is reduced under the condition that the use performance of the valve is ensured, and the service life of the valve is prolonged. And the competitiveness of the product is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of check valve technology, specifically a swing 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 swing 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 swing check valve, including a valve body, a rocker assembly, and a rocker mounting part. The rocker assembly includes a rocker shaft, and the rocker mounting part has two mounting units. Each mounting unit includes a mounting platform and a mounting block that are respectively arranged. The mounting platform is fixed in the valve body, and the mounting block is located between the two mounting platforms and is fixedly connected to the corresponding mounting platform. The side of the mounting block away from the mounting platform is provided with a mounting hole that mates with the rocker shaft. Both ends of the rocker shaft extend into the two mounting holes respectively.

[0006] Furthermore, the rocker assembly also includes a rocker, one end of which is fixedly provided with a rocker bushing. The rocker bushing is sleeved on the rocker shaft and located between two mounting blocks. The distance between the two mounting blocks is 2-5 mm larger than the axial length of the rocker bushing.

[0007] Furthermore, the mounting unit also includes a fixing block fixed to the corresponding mounting block. The fixing block is installed on the upper / lower side of the corresponding mounting platform by bolts, so that the mounting block can be detachably installed on the mounting platform.

[0008] Furthermore, the two fixing blocks are an integral structure, or the two fixing blocks are integrally formed and connected, and each fixing block is integrally formed and connected with the corresponding mounting block.

[0009] Furthermore, at least one mounting block has a gap L between it and the corresponding mounting platform.

[0010] Furthermore, the maximum value of the gap L is 2mm.

[0011] Furthermore, the mounting hole is a through hole, the surface of the mounting block facing the corresponding mounting platform is a reference surface, the projections of the mounting platform and the rocker shaft on the reference surface overlap, and the distance between the mounting platform and the mounting block in another mounting unit is less than the axial length of the rocker shaft.

[0012] Furthermore, the distance between the two mounting platforms is greater than the axial length of the rocker shaft.

[0013] Furthermore, one side of the valve body cavity is a mounting side with two mounting platforms, and the side of the fixing block facing the mounting side is offset relative to the mounting block towards the opposite side of the mounting side.

[0014] Furthermore, the mounting platform and valve body are integrally molded structures.

[0015] The beneficial effects of this utility model are as follows: by setting the mounting block for mounting the rocker shaft between two mounting platforms, the height of the entire rocker mounting part is effectively shortened, thereby reducing the internal height of the valve body accordingly. While ensuring the performance of the valve, the casting cost of the valve body is reduced, enhancing the competitiveness of the product.

[0016] By setting the distance between the two mounting blocks to be greater than the axial length of the rocker sleeve, the sleeve can be effectively inserted between the two mounting blocks during installation. At the same time, the difference between the distance between the two mounting blocks and the axial length of the rocker sleeve is limited to within 5mm, so that the two mounting blocks can limit the rocker sleeve and prevent the sleeve from moving violently along its axial direction during valve operation.

[0017] By setting a certain clearance between the mounting block and the mounting platform, jamming can be avoided when the mounting block is inserted into the mounting platform. At the same time, the clearance is limited to within 3mm to prevent excessive offset between the mounting block and the mounting platform when bolts are used to fix them.

[0018] By limiting the rocker arm shaft with the mounting block, the shaft is prevented from flying out of the mounting hole due to external force during valve operation.

[0019] By setting one side of the fixing block to be recessed relative to the mounting block to the other side, the purpose of weight reduction and cost reduction is achieved. At the same time, since there may be burrs on the surface of the cast valve body, the side of the fixing block facing the valve body is set away from the valve body to avoid the fixing block touching the valve body and interfering with the burrs on the inner surface of the valve body, so as to prevent it from being stably installed on the mounting table. Attached Figure Description

[0020] 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.

[0021] Figure 1 This is a cross-sectional view of a swing check valve in the prior art;

[0022] Figure 2 This is a front view of the swing check valve in Embodiment 1 of this utility model;

[0023] Figure 3 The swing check valve in Embodiment 1 of this utility model is along Figure 2 A cross-sectional view along line AA;

[0024] Figure 4 This is a top view of the valve body in Embodiment 1 of this utility model;

[0025] Figure 5 This is a side view of the swing check valve (concealed valve cover assembly) of Embodiment 1 of this utility model;

[0026] Figure 6 The swing check valve in Embodiment 1 of this utility model is along Figure 5 A cross-sectional view of the BB line;

[0027] Figure 7 yes Figure 6 A magnified view of part C in the middle; and

[0028] Figure 8 This is a schematic diagram of the installation block and fixing block in Embodiment 2 of this utility model.

[0029] In the diagram: 1' is valve body, 2' is boss, 3' is bracket, 4' is rocker shaft, 1 is valve body, 2 is rocker, 3 is rocker shaft, 4 is valve disc, 5 is rocker bushing, 6 is valve cover assembly, 7 is mounting platform, 8 is fixing block, 9 is mounting block, 10 is bolt, 11 is first through hole, 12 is mounting hole, 13 is mounting side, and 14 is protruding structure. Detailed Implementation

[0030] 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.

[0031] Example 1

[0032] 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 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.

[0033] Figure 2 This is a front view of the swing check valve in Embodiment 1 of this utility model; Figure 3 The swing check valve in Embodiment 1 of this utility model is along Figure 2 A cross-sectional view along line AA; Figure 4 This is a top view of the valve body in Embodiment 1 of this utility model; Figure 5 This is a side view of the swing check valve (concealed valve cover assembly) of Embodiment 1 of this utility model; Figure 6 The swing check valve in Embodiment 1 of this utility model is along Figure 5 A cross-sectional view of the BB line; Figure 7 yes Figure 6 A magnified view of part C in the middle.

[0034] like Figure 2-7 As shown, a swing check valve of this embodiment includes a valve body 1, a rocker assembly, a rocker mounting part, and a valve cover assembly 6.

[0035] The valve body 1 is a cast valve body, and a protruding structure 14 protruding towards its center is formed on the upper side wall of the inner cavity of the valve body 1; the rocker assembly includes a rocker 2, a rocker shaft 3, and a valve disc 4. A rocker shaft sleeve 5 is fixedly provided at one end of the rocker 2, and the rocker shaft sleeve 5 is sleeved on the rocker shaft 3; the valve disc 4 is installed at the other end of the rocker 2; the valve cover assembly 6 is installed in the protruding structure 14. This is prior art and will not be described in detail here.

[0036] The joystick mounting section consists of two mounting units. Each mounting unit includes a mounting platform 7, a fixing block 8, and a mounting block 9.

[0037] The mounting platform 7 is fixed to the inner wall of the valve body 1. Specifically, the mounting platform 7 and the valve body 1 are a cast integral structure. The mounting platform 7 has a longitudinally arranged first through hole 11. Two mounting platforms 7 are spaced apart in the horizontal direction.

[0038] The fixing block 8 is fixed to the upper / lower side of the mounting platform 7 by bolts 10, allowing the mounting block 9 to be detachably installed on the mounting platform 7. The fixing block 8 has a longitudinally arranged second through hole. In this example, the fixing block 8 is fixed to the upper side of the mounting platform 7 by bolts 10. At this time, the first through hole 11 is a threaded hole, and the second through hole is a smooth / threaded hole. The bolt 10 passes through the second through hole and is threadedly connected to the first through hole 11.

[0039] Mounting block 9 is fixed to the lower side of the corresponding fixing block 8, and the mounting block 9 and the corresponding fixing block 8 are a cast integral structure. Of course, mounting block 9 and fixing block 8 can also be connected by welding, or they can be an integral structure machined from a blank by a lathe. It is preferred that fixing block 8 is located on the upper side of mounting platform 7 and mounting block 9. Of course, in other embodiments, fixing block 8 can also be located on the lower side of mounting block 9 and installed on the lower side of mounting platform 7.

[0040] Mounting block 9 is located between two mounting platforms 7. Each mounting block 9 has a mounting hole 12 that mates with the rocker shaft 3. The mounting hole 12 mates with the rocker shaft 3 in that it is a round hole with a clearance fit to the end of the rocker shaft 3. Both ends of the rocker shaft 3 extend into the two mounting holes 12 respectively. By placing the mounting block 9 for mounting the rocker shaft 3 between the two mounting platforms 7, the overall height of the rocker mounting section is effectively shortened, thereby correspondingly reducing the internal height of the valve body 1. This reduces the valve body casting cost while ensuring valve performance, enhancing the product's competitiveness.

[0041] In this embodiment, the mounting hole 12 is a through hole. The surface of the mounting block 9 facing the corresponding mounting platform 7 is defined as the reference surface. The projections of the mounting platform 7 and the rocker shaft 3 on the corresponding reference surface overlap. The distance between the mounting platform 7 and the mounting block 9 in another mounting unit is less than the axial length of the rocker shaft 3, and the distance between the two mounting platforms 7 is greater than the axial length of the rocker shaft 3. By limiting the rocker shaft 3 with the mounting block 9, the shaft is prevented from flying out of the mounting hole 12 due to external force during valve operation. In other embodiments, the mounting hole 12 can also be a blind hole. In this case, for ease of installation, the rocker shaft 3 needs to be telescopic and formed by connecting two shafts, for example, the rocker shaft 3 is formed by connecting two shafts with threads.

[0042] The rocker arm sleeve 5 is located between two mounting blocks 9, and the distance between the two mounting blocks 9 is 2-5mm larger than the axial length of the rocker arm sleeve 5. By setting the distance between the two mounting blocks 9 to be larger than the axial length of the rocker arm sleeve 5, the rocker arm sleeve 5 can effectively extend between the two mounting blocks 9 during installation. At the same time, the difference between the distance between the two mounting blocks 9 and the axial length of the rocker arm sleeve 5 is limited to no more than 5mm, so that the two mounting blocks 9 have a limiting effect on the rocker arm sleeve 5, preventing the sleeve 2 from moving violently along its axial direction during valve operation.

[0043] One side of the inner cavity of the valve body 1 is the mounting side 13 with two mounting platforms 7. The side of the fixing block 8 facing the mounting side is offset relative to the mounting block 9 to the opposite side of the mounting side in order to reduce weight and cost. At the same time, it avoids the fixing block 8 from touching the protruding structure 14 and interfering with it, so that it can be securely installed on the mounting platform 7.

[0044] In this utility model, the installation process of the rocker assembly into the valve body 1 is as follows: place the rocker bushing 5 between the two mounting blocks 9, pass the rocker shaft 3 through one mounting hole 12, the rocker bushing 5 and the other mounting hole 12 in sequence, and then fix the two fixing blocks 8 to the mounting platform 7 with bolts 10 respectively.

[0045] In this embodiment, by setting two fixed blocks 8 as a separate structure, the purpose of weight reduction is achieved.

[0046] Example 2

[0047] In this second embodiment, the parts that are the same as in the first embodiment are numbered the same.

[0048] Figure 8 This is a schematic diagram of the installation block and fixing block in Embodiment 2 of this utility model.

[0049] like Figure 8 As shown, the difference between this embodiment 2 and embodiment 1 is that the two fixing blocks 8 are an integral structure, that is, the two fixing blocks 8 together form a plate-like structure, and the two fixing blocks 8 and the two mounting blocks 9 are an integral structure.

[0050] At least one mounting block 9 has a gap L between it and its corresponding mounting platform 7, where L is 0.5mm-3mm. By providing a certain clearance between the mounting block 9 and the mounting platform 7, jamming when the mounting block 9 is inserted into the mounting platform 7 can be avoided. Simultaneously, the clearance is limited to within 2mm to prevent excessive misalignment between the bolt 10 and the fixing block 8 and the mounting platform 7. Preferably, each mounting block 9 has a gap between it and its corresponding mounting platform 7, where the gap is 0.5mm-1.5mm.

[0051] Compared to Embodiment 1, in this embodiment, the entire structure with the rocker arm shaft 3 inserted can be inserted between two mounting platforms 7 and then fixed to the mounting platform 7 with bolts 10, making the installation of the rocker arm 2 more convenient.

[0052] The above-disclosed embodiment is merely a preferred embodiment 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 swing check valve, characterized in that, The device includes a valve body (1), a rocker assembly, and a rocker mounting part. The rocker assembly includes a rocker shaft (3). The rocker mounting part has two mounting units. Each mounting unit includes a mounting platform (7) and a mounting block (9) that are respectively provided. The mounting platform (7) is fixed inside the valve body (1). The mounting block (9) is located between the two mounting platforms (7) and is fixedly connected to the corresponding mounting platform (7). The mounting block (9) has a mounting hole (12) that cooperates with the rocker shaft (3) on the side away from the mounting platform (7). Both ends of the rocker shaft (3) extend into the two mounting holes (12) respectively.

2. The swing check valve according to claim 1, characterized in that, The rocker assembly also includes a rocker (2), one end of which is fixedly provided with a rocker bushing (5). The rocker bushing (5) is sleeved on the rocker shaft (3) and located between the two mounting blocks (9). The distance between the two mounting blocks (9) is 2-5 mm larger than the axial length of the rocker bushing (5).

3. A swing check valve according to claim 1, characterized in that, The installation unit also includes a fixing block (8) fixed to the corresponding installation block (9). The fixing block (8) is installed on the upper / lower side of the corresponding installation platform (7) by bolts (10), so that the installation block (9) can be detachably installed on the installation platform (7).

4. A swing check valve according to claim 3, characterized in that, The two fixing blocks (8) are integral structures, or the two fixing blocks (8) are integrally formed and connected, and each fixing block (8) is integrally formed and connected with the corresponding mounting block (9).

5. A swing check valve according to claim 4, characterized in that, There is a gap L between at least one of the mounting blocks (9) and the corresponding mounting platform (7).

6. A swing check valve according to claim 5, characterized in that, The maximum value of the gap L is 3mm.

7. A swing check valve according to claim 3 or 4, characterized in that, The mounting hole (12) is a through hole. The surface of the mounting block (9) facing the mounting platform (7) is a reference surface. The projections of the mounting platform (7) and the rocker shaft (3) on the reference surface overlap. The distance between the mounting platform (7) and the mounting block (9) in another mounting unit is less than the axial length of the rocker shaft (3).

8. A swing check valve according to claim 7, characterized in that, The distance between the two mounting platforms (7) is greater than the axial length of the rocker shaft (3).

9. A swing check valve according to claim 3 or 4, characterized in that, One side of the inner cavity of the valve body (1) is a mounting side (13) with two mounting platforms (7), and the side of the fixing block (8) facing the mounting side (13) is offset relative to the mounting block (9) to the opposite side of the mounting side (13).

10. A swing check valve according to claim 1, characterized in that, The mounting platform (7) and the valve body (1) are integrally formed.

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