Counter weight type slow-closing check valve

Abstract

The utility model discloses a heavy hammer type slow-closing check valve, which relates to the technical field of heavy hammer valves, and comprises a check valve, a valve shaft of the check valve rotatably penetrates out of the check valve, the outer surface of the check valve is fixedly connected with a mounting rack, and the mounting rack is fixedly connected with the heavy hammer type slow-closing check valve. The right end of the check valve shaft rotationally penetrates out of the right side surface of the mounting frame, a slow closing assembly is arranged on the mounting frame, the outer surface of the check valve shaft is fixedly connected with a limiting connecting arm, the outer surface of the limiting connecting arm is slidably sleeved with a balance weight box, a balance weight is arranged in the balance weight box, and the right end of the check valve shaft rotationally penetrates out of the right side surface of the mounting frame. A mounting lug is fixedly connected to the upper side surface of the balancing weight, a first receding groove matched with the mounting lug is formed in the lower side surface of the balancing weight, the rear side of the first receding groove extends out of the rear side surface of the balancing weight, and an adjusting assembly is arranged on the balancing weight box. The weight can be rapidly adjusted according to needs through the cooperation of the counterweight box and the counterweight block, and the adjustment can be completed without the help of tools.

Description

Technical Field

[0001] This utility model 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. Utility Model Content

[0004] The purpose of this utility model 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, this utility model 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 fitted 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 connecting 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 connecting 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 this utility model are:

[0014] 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.

[0015] 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

[0016] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0017] Figure 1 This is a schematic diagram of the structure of a counterweight type slow-closing check valve according to the present invention.

[0018] Figure 2 This is a schematic diagram of the threaded sleeve of this utility model;

[0019] Figure 3 This is a schematic diagram of the partition of this utility model;

[0020] Figure 4 This is a schematic diagram of the first clearance groove of this utility model;

[0021] Figure 5for Figure 3 Enlarged view of point A in the middle.

[0022] 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. Connecting 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

[0023] This section will describe in detail the specific embodiments of the present utility model. The preferred embodiments of the present utility model 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 the overall technical solution of the present utility model, but they should not be construed as limiting the scope of protection of the present utility model.

[0024] Please see Figures 1-5 This utility model provides a technical solution: a counterweight-type slow-closing check valve, including a check valve 1, the valve shaft of the check valve 1 rotatably extends 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 rotatably extends 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, the weight can be quickly adjusted as needed through the cooperation of the counterweight box 5 and the counterweight block 6, and this can be done without the aid of tools.

[0025] Furthermore, the adjusting assembly includes a threaded sleeve 9, which is fixedly connected to the rear surface of the counterweight box 6. A connecting 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 connecting 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.

[0026] 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.

[0027] The embodiments of the present utility model have been described in detail above with reference to the accompanying drawings. However, the present utility model 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 utility model.

Claims

1. A heavy-duty slow-close non-return valve comprising a non-return valve (1), characterised in that: The valve shaft of the check valve (1) rotates through the outside of the check valve (1), the check valve (1) is fixedly connected with a mounting frame (2), the right end of the valve shaft of the check valve (1) rotates through the right side surface of the mounting frame (2), the mounting frame (2) is provided with a slow closing assembly (3), the outer surface of the valve shaft of the check valve (1) is fixedly connected with a limiting connecting arm (4), the outer surface of the limiting connecting arm (4) is slidably sleeved with a counterweight box (5), the inside of the counterweight box (5) is provided with a counterweight block (6), the upper side surface of the counterweight block (6) is fixedly connected with a mounting lug (7), the lower side surface of the counterweight block (6) is provided with a first accommodating groove (8) matched with the mounting lug (7), the rear side of the first accommodating groove (8) extends out of the rear side surface of the counterweight block (6), and the counterweight box (5) is provided with an adjusting assembly.

2. A heavy-duty slow-close check valve according to claim 1, wherein: The adjusting assembly comprises a threaded sleeve (9), and the threaded sleeve (9) is fixedly connected to the rear side surface of the counterweight box (5).

3. A heavy-duty slow-close check valve according to claim 2, wherein: The outer surface of the valve shaft of the check valve (1) is fixedly connected with a connecting plate (10).

4. A heavy-duty slow-close check valve according to claim 3, wherein: The inside of the threaded sleeve (9) is threadedly connected with a threaded rod (11), the upper end of the threaded rod (11) rotates through the upper end of the connecting plate (10), and the upper end of the threaded rod (11) is fixedly connected with a knob (12).

5. A heavy-duty slow-close check valve according to claim 4, wherein: The lower end of the threaded rod (11) extends out of the lower side surface of the threaded sleeve (9), the lower end of the threaded rod (11) is fixedly connected with a limiting disc (13), the inner wall of the counterweight box (5) is fixedly connected with a partition plate (14), and the counterweight block (6) is arranged on the upper side surface of the partition plate (14).

6. A heavy-duty slow-close check valve according to claim 5, wherein: The lower side surface of the counterweight block (6) is in contact with the upper side surface of the partition plate (14), the upper and lower inner walls of the counterweight box (5) are fixedly connected with a protective sleeve (21), and the upper side surface of the counterweight box (5) is provided with a through groove (15) extending out of the lower side surface thereof.

7. A heavy-duty slow-close check valve according to claim 6, wherein: The protective sleeve (21) communicates with the inside of the through groove (15), the limiting connecting arm (4) is slidably sleeved in the inside of the through groove (15), the front side surface of the counterweight block (6) is provided with a weight mark (16), and the upper side surface of the counterweight box (5) is provided with a sliding groove (17) extending into the inside thereof.

8. A heavy-duty slow-close check valve according to claim 7, wherein: The inside of the sliding groove (17) is slidably connected with a cabinet door (18), the upper side surface of the cabinet door (18) is fixedly connected with a fixed plate (19), and the lower side surface of the fixed plate (19) and the upper side surface of the counterweight box (5) are fixedly connected with magnets (20). The side surfaces of the two magnets (20) are oppositely arranged, and the counterweight block (6) is provided with a second accommodating groove (22) matched with the protective sleeve (21).

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