A heavy weight slow closing check valve

Abstract

The application discloses a heavy hammer type slow closing check valve and relates to the technical field of heavy hammer valves. The heavy hammer type slow closing check valve comprises a check valve, a valve shaft of the check valve is rotatably arranged outside the check valve, an installation frame is fixedly connected to the outer surface of the check valve, the right end of the valve shaft of the check valve is rotatably arranged on the right surface of the installation frame, a slow closing assembly is arranged on the installation frame, a limiting connecting arm is fixedly connected to the outer surface of the valve shaft of the check valve, a counterweight box is slidably arranged on the outer surface of the limiting connecting arm, a counterweight block is arranged in the counterweight box, an installation lug is fixedly connected to the upper surface of the counterweight block, a first accommodating groove matched with the installation lug is formed in the lower surface of the counterweight block, the rear side of the first accommodating groove extends out of the rear surface of the counterweight block, and an adjusting assembly is arranged on the counterweight box. The counterweight box and the counterweight block are matched, the weight can be quickly adjusted according to the requirement, and the adjustment can be completed without the aid of tools.

Description

Technical Field

[0001] This invention relates to the field of counterweight valve technology, and in particular to a counterweight slow-closing check valve. Background Technology

[0002] The counterweight slow-closing check valve is mainly used to prevent backflow of media in pipelines and to eliminate destructive water hammer. It only allows the media to flow in one direction. When the media attempts to flow in the opposite direction, the counterweight slow-closing check valve will close to prevent backflow.

[0003] In existing technologies, when the pipeline pressure is less than the weight of the counterweight, the valve will quickly close part of its valve under the action of gravity, and then slowly close the remaining part with the help of a hydraulic telescopic rod to avoid water hammer. The existing counterweight is generally fixedly connected to the connecting arm. When the pipeline pressure regulation and flow rate change, the counterweight may not be able to meet the valve's slow-closing requirements under the new conditions. At this time, it is necessary to adjust and replace the weight of the counterweight. However, since the counterweight is fixed to the connecting arm, it is difficult to quickly replace the counterweight. In view of this, we propose a counterweight-type slow-closing check valve. Summary of the Invention

[0004] The purpose of this invention is to provide a counterweight-type slow-closing check valve to solve the problem of the difficulty in adjusting or replacing the weight of the counterweight.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a counterweight-type slow-closing check valve, comprising a check valve, wherein the valve shaft of the check valve rotatably extends through the outside of the check valve, a mounting bracket is fixedly connected to the outer surface of the check valve, the right end of the valve shaft of the check valve rotatably extends through the right side surface of the mounting bracket, a slow-closing component is provided on the mounting bracket, a limiting connecting arm is fixedly connected to the outer surface of the valve shaft of the check valve, a counterweight box is slidably sleeved on the outer surface of the limiting connecting arm, a counterweight block is provided inside the counterweight box, a mounting ear is fixedly connected to the upper surface of the counterweight block, a first clearance groove adapted to the mounting ear is opened on the lower surface of the counterweight block, the rear side of the first clearance groove extends out of the rear surface of the counterweight block, and an adjustment component is provided on the counterweight box.

[0006] Preferably, the adjusting component includes a threaded sleeve, which is fixedly connected to the rear surface of the counterweight box, and a fixing plate is fixedly connected to the outer surface of the check valve shaft.

[0007] Preferably, the threaded sleeve has an internal threaded connection to a threaded rod, the upper end of which rotatably passes through the upper end of the fixed plate, and a knob is fixedly connected to the upper end of the threaded rod.

[0008] Preferably, the lower end of the threaded rod extends out of the lower surface of the threaded sleeve, the lower end of the threaded rod is fixedly connected to a limiting plate, a partition is fixedly connected to the inner wall of the counterweight box, and the counterweight block is disposed on the upper surface of the partition.

[0009] Preferably, the lower surface of the counterweight block is in contact with the upper surface of the partition, a protective sleeve is fixedly connected between the upper and lower inner walls of the counterweight box, and a through groove extending from the lower surface of the upper surface of the counterweight box is provided.

[0010] Preferably, the protective sleeve communicates with the interior of the through groove, the limiting connecting arm is slidably sleeved inside the through groove, the front surface of the counterweight is provided with a weight mark, and the upper surface of the counterweight box is provided with a sliding groove extending into its interior.

[0011] Preferably, a cabinet door is slidably connected inside the sliding groove, a fixing plate is fixedly connected to the upper surface of the cabinet door, and magnets are fixedly connected to the lower surface of the fixing plate and the upper surface of the counterweight box.

[0012] Preferably, the surfaces of the two magnets that are close to each other are of opposite orientation, and the counterweight has a second clearance groove that is adapted to the protective sleeve.

[0013] Compared with the prior art, the beneficial effects of the present invention are: 1. This counterweight-type slow-closing check valve can quickly adjust the weight as needed through the cooperation of the counterweight box and the counterweight block, and can be done without the aid of tools.

[0014] 2. This counterweight-type slow-closing check valve, with the sliding feature of the counterweight box, allows for fine adjustment of the weight applied to the valve shaft, resulting in more precise control. Furthermore, the weight markings on the counterweight block facilitate direct observation of the overall weight inside the counterweight box for calculation purposes. Attached Figure Description

[0015] The present invention will be further described below with reference to the accompanying drawings and embodiments: Figure 1 This is a schematic diagram of the structure of a counterweight type slow-closing check valve according to the present invention; Figure 2 This is a schematic diagram of the threaded sleeve of the present invention; Figure 3 This is a schematic diagram of the partition of the present invention; Figure 4 This is a schematic diagram of the first clearance groove of the present invention; Figure 5 for Figure 3 Enlarged view of point A in the middle.

[0016] Reference numerals: 1. Check valve; 2. Mounting bracket; 3. Slow-closing assembly; 4. Limiting connecting arm; 5. Counterweight box; 6. Counterweight block; 7. Mounting ear; 8. First clearance groove; 9. Threaded sleeve; 10. Fixing plate; 11. Threaded rod; 12. Knob; 13. Limiting plate; 14. Partition plate; 15. Through groove; 16. Weight mark; 17. Sliding groove; 18. Cabinet door; 19. Fixing plate; 20. Magnet; 21. Protective sleeve; 22. Second clearance groove. Detailed Implementation

[0017] This section will describe in detail specific embodiments of the present invention. Preferred embodiments of the present invention are shown in the accompanying drawings. The purpose of the drawings is to supplement the textual description with graphics, so that people can intuitively and vividly understand each technical feature and overall technical solution of the present invention, but they should not be construed as limiting the scope of protection of the present invention.

[0018] Please see Figure 1-5 This invention provides a technical solution: a counterweight-type slow-closing check valve, comprising a check valve 1, the valve shaft of the check valve 1 rotatably extending through the outside of the check valve 1, a mounting bracket 2 fixedly connected to the outer surface of the check valve 1, the right end of the valve shaft of the check valve 1 rotatably extending through the right side surface of the mounting bracket 2, a slow-closing component 3 provided on the mounting bracket 2, a limiting connecting arm 4 fixedly connected to the outer surface of the valve shaft of the check valve 1, a counterweight box 5 slidably sleeved on the outer surface of the limiting connecting arm 4, a counterweight block 6 provided inside the counterweight box 5, a mounting ear 7 fixedly connected to the upper surface of the counterweight block 6, a first clearance groove 8 adapted to the mounting ear 7 opened on the lower surface of the counterweight block 6, the rear side of the first clearance groove 8 extending out of the rear surface of the counterweight block 6, an adjustment component provided on the counterweight box 6, the weight can be quickly adjusted as needed through the cooperation of the counterweight box 5 and the counterweight block 6, and can be completed without the aid of tools.

[0019] Furthermore, the adjusting assembly includes a threaded sleeve 9, which is fixedly connected to the rear surface of the counterweight box 6. A fixing plate 10 is fixedly connected to the outer surface of the valve shaft of the check valve 1. A threaded rod 11 is threadedly connected inside the threaded sleeve 9. The upper end of the threaded rod 11 rotates through the upper end of the fixing plate 10. A knob 12 is fixedly connected to the upper end of the threaded rod 11. The lower end of the threaded rod 11 extends out of the lower surface of the threaded sleeve 9. A limit plate 13 is fixedly connected to the lower end of the threaded rod 11. A partition plate 14 is fixedly connected to the inner wall of the counterweight box 5. A counterweight 6 is disposed on the upper surface of the partition plate 14. The lower surface of the counterweight 6 contacts the upper surface of the partition plate 14. A protective sleeve 21 is fixedly connected between the upper and lower inner walls of the counterweight box 5. A through groove 15 extending out of the lower surface of the upper surface of the counterweight box 5 is provided. The protective sleeve 21 and the through groove 15 are connected. The internal structure of the counterweight box 5 is interconnected. The limiting connecting arm 4 is slidably sleeved inside the through groove 15. The front surface of the counterweight block 6 is provided with a weight mark 16. The upper surface of the counterweight box 5 is provided with a sliding groove 17 extending into its interior. The interior of the sliding groove 17 is slidably connected to a cabinet door 18. The upper surface of the cabinet door 18 is fixedly connected to a fixing plate 19. The lower surface of the fixing plate 19 and the upper surface of the counterweight box 5 are both fixedly connected with magnets 20. The surfaces of the two magnets 20 that are close to each other are set with opposite orientations. The counterweight block 6 is provided with a second clearance groove 22 that matches the protective sleeve 21. With the sliding feature of the counterweight box 5, the weight applied to the valve shaft of the check valve 1 can be finely adjusted, thereby making the operation more precise. Moreover, the weight mark 16 on the counterweight block 6 makes it easy to directly observe the overall weight inside the counterweight box 5 for calculation.

[0020] Working principle: When the weight of the counterweight box 5 needs to be adjusted, if the weight difference is large, the counterweight block 6 inside the counterweight box 5 can be replaced. The specific operation steps are as follows: pull the fixing plate 19 upward, and use the movement of the fixing plate 19 to drive the cabinet door 18 to move synchronously. After the cabinet door 18 moves, use the mounting ear 7 to pull out the counterweight block 6 directly, and then replace it with a counterweight block 6 of the corresponding weight. When the weight needs to be fine-tuned, the knob 12 can be turned. When the knob 12 is turned, it will drive the threaded rod 11 to rotate synchronously. When the threaded rod 11 rotates, the movement trajectory of the threaded sleeve 9 is restricted by the counterweight box 5, and the movement trajectory of the threaded sleeve 9 is restricted by the limiting connecting arm 4. Therefore, when the threaded rod 11 rotates, it will drive the counterweight box 5 to move synchronously. When the counterweight box 5 moves, it gradually approaches or moves away from the valve shaft of the check valve 1, thereby fine-tuning the weight applied by the counterweight box 5 to the valve shaft of the check valve 1.

[0021] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments. Within the scope of knowledge possessed by those skilled in the art, various changes can be made without departing from the spirit of the present invention.

Claims

1. A counterweight type slow-closing check valve, comprising a check valve (1), characterized in that: The valve shaft of the check valve (1) rotates through the outside of the check valve (1). A mounting bracket (2) is fixedly connected to the outer surface of the check valve (1). The right end of the valve shaft of the check valve (1) rotates through the right side surface of the mounting bracket (2). A slow-closing component (3) is provided on the mounting bracket (2). A limiting connecting arm (4) is fixedly connected to the outer surface of the valve shaft of the check valve (1). A counterweight box (5) is slidably sleeved on the outer surface of the limiting connecting arm (4). A counterweight block (6) is provided inside the counterweight box (5). A mounting ear (7) is fixedly connected to the upper surface of the counterweight block (6). A first clearance groove (8) adapted to the mounting ear (7) is opened on the lower surface of the counterweight block (6). The rear side of the first clearance groove (8) extends out of the rear surface of the counterweight block (6). An adjustment component is provided on the counterweight box (6).

2. The counterweight-type slow-closing check valve according to claim 1, characterized in that: The adjusting assembly includes a threaded sleeve (9), which is fixedly connected to the rear surface of the counterweight box (6), and a fixing plate (10) is fixedly connected to the outer surface of the valve shaft of the check valve (1).

3. The counterweight-type slow-closing check valve according to claim 1, characterized in that: The threaded sleeve (9) is internally threaded with a threaded rod (11), the upper end of which rotates through the upper end of the fixed plate (10), and a knob (12) is fixedly connected to the upper end of the threaded rod (11).

4. The counterweight-type slow-closing check valve according to claim 1, characterized in that: The lower end of the threaded rod (11) extends out of the lower surface of the threaded sleeve (9), and the lower end of the threaded rod (11) is fixedly connected to the limiting plate (13). The inner wall of the counterweight box (5) is fixedly connected to the partition plate (14), and the counterweight block (6) is set on the upper surface of the partition plate (14).

5. A counterweight-type slow-closing check valve according to claim 1, characterized in that: The lower surface of the counterweight (6) is in contact with the upper surface of the partition (14). A protective sleeve (21) is fixedly connected between the upper and lower inner walls of the counterweight box (5). A through groove (15) extending from the lower surface of the upper surface of the counterweight box (5) is provided.

6. A counterweight-type slow-closing check valve according to claim 1, characterized in that: The protective sleeve (21) communicates with the inside of the through groove (15), the limiting connecting arm (4) is slidably sleeved inside the through groove (15), the front surface of the counterweight (6) is provided with a weight mark (16), and the upper surface of the counterweight box (5) is provided with a sliding groove (17) extending into its interior.

7. A counterweight-type slow-closing check valve according to claim 1, characterized in that: The sliding groove (17) is slidably connected to a cabinet door (18), and a fixing plate (19) is fixedly connected to the upper surface of the cabinet door (18). Magnets (20) are fixedly connected to the lower surface of the fixing plate (19) and the upper surface of the counterweight box (5).

8. A counterweight-type slow-closing check valve according to claim 1, characterized in that: The two magnets (20) have opposite sides on their adjacent surfaces, and the counterweight (6) has a second clearance groove (22) that is compatible with the protective sleeve (21).

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