Check valve for chemical pipeline

Abstract

The utility model relates to the technical field of chemical raw material conveying, in particular to a chemical pipeline check valve which comprises a confluence barrel, conveying pipes, a top pipe, a sealing cover and an adjusting device, the conveying pipes are installed on the two sides of the confluence barrel and communicated with the confluence barrel, the top pipe is installed at the bottom end of the confluence barrel, the sealing cover is installed on the surface of the top pipe, and the top pipe is communicated with the confluence barrel. The adjusting device is arranged on the surface of the top pipe and comprises two backflow rings, and the two backflow rings are fixedly connected with the surfaces of the two sides of the confluence cylinder and communicated with the confluence cylinder. According to the check valve, by arranging the adjusting device, the situation that chemical raw materials influence the sealing assembly is effectively reduced, when conveying of the chemical raw materials is stopped, the adjusting device is adjusted, the situation that a large amount of chemical raw materials flow back and make contact with the blocking block is avoided, the practicability of the check valve is improved, and the auxiliary performance of the check valve is improved; the service life of the check valve is prolonged, and damage to the interior of the check valve caused by corrosive chemical raw materials is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of chemical raw material transportation, in particular to a check valve for chemical pipelines. Background Art

[0002] A check valve for a transport pipe refers to a valve used to prevent the reverse flow of water. For example, it is used as a protection device when the water pump stops pumping on the pipeline at the outlet of the water pump. Check valves can be divided into two types according to their structures: lift check valves and swing check valves. The lift check valve is installed on a horizontal transport pipe, with a large head loss and is only suitable for small pipe diameters; the swing check valve generally has a larger diameter and can be installed on both horizontal and vertical transport pipes. Check valves have strict directionality. When installing, great attention should be paid to ensuring that the opening and closing of the valve plate or valve core are consistent with the water flow direction and can close automatically under the action of gravity to prevent the state of being always open and not closed. With the development of society, when chemical raw materials need to be transported, a check valve for a transport pipe is used.

[0003] Existing devices such as CN118423479A, a check valve, include: a sealed housing, which is provided with a fluid inlet and a fluid outlet, and a rotating pin shaft is rotatably installed at the fluid inlet, and at least one end of the rotating pin shaft penetrates through the sealed housing; a valve flap assembly, fixedly installed on the rotating pin shaft, the valve flap assembly has a first state of blocking the fluid inlet and a second state of swinging around the rotating pin shaft to open the fluid inlet; an indicating assembly, installed at one end of the rotating pin shaft extending outside the sealed housing, and a signal transmitting member is arranged inside the indicating assembly. During the operation of the valve flap assembly, the rotating pin shaft rotates simultaneously, and then drives the indicating assembly located outside the sealed housing to act together, so that the signal transmitting member can transmit the state of the indicating assembly to the external control room in real time. The state of the indicating assembly corresponds to the state of the valve flap assembly one by one, and thus the state of the valve flap assembly can be known, realizing the real-time feedback of the on-off state of the check valve.

[0004] When a worker needs to control the flow of chemical raw materials, the worker adjusts the check valve so that the check valve adjusts the flow of chemical raw materials. Since the check valve in the above-mentioned comparative document restricts the flow of chemical raw materials by installing a closing assembly on one side close to the transport pipe, when the check valve stops transporting chemical raw materials, the chemical raw materials on the other side will lose restriction and there will be a backflow situation, resulting in most of the backflowed chemical raw materials converging in the confluence cylinder, and then causing the problem that one side of the closing assembly will be in contact with the chemical raw materials for a long time. Summary of the Utility Model

[0005] The purpose of the utility model is to solve the defect that one side of the existing closing assembly will be in contact with chemical raw materials for a long time, and to provide a check valve for chemical pipelines.

[0006] To achieve the above object, the present utility model adopts the following technical solutions: A check valve for chemical pipelines, comprising a confluence cylinder, a transport pipe, a top pipe, a closing cover and an adjusting device. The transport pipes are installed on both sides of the confluence cylinder, and the transport pipes communicate with the confluence cylinder. The top pipe is installed at the bottom end of the confluence cylinder, and a closing cover is installed on the surface of the top pipe. The top pipe communicates with the confluence cylinder. The adjusting device is arranged on the surface of the top pipe. The adjusting device includes a reflux ring. The two reflux rings are fixedly connected to the surfaces on both sides of the confluence cylinder, and the two reflux rings communicate with the confluence cylinder. A V-shaped cavity is arranged between the two reflux rings. A blocking block is placed on the surface of the V-shaped cavity. A threaded rod is arranged above the blocking block, and the threaded rod is threadedly connected to the surface of the closing cover. The top end of the threaded rod is fixedly connected with a rotating handle. A second rubber pad is fixedly connected to the lower surface of the closing cover, and a first rubber pad is fixedly connected to the upper surface of the closing cover. The first rubber pad and the second rubber pad are of the same size. Guide grooves are formed on the inner surface of the top pipe, and the two guide grooves are symmetrically arranged. A closing disk is fixedly connected to the top end of the blocking block, and the closing disk is slidably connected to the surface of the top pipe. The guide grooves can cooperate with the top pipe, the closing disk and the blocking block to guide the closing disk.

[0007] Preferably, a sliding strip is fixedly connected to the surface of the closing disk, the threaded rod is rotatably connected to the surface of the sliding strip, and the sliding strip is slidably connected to the surface of the guide groove. The sliding strip can cooperate with the closing disk and the guide groove to limit the rotation of the blocking block.

[0008] Preferably, a cleaning device is arranged on the surface of the confluence cylinder. The cleaning device includes a threaded ring, the threaded ring is installed on the surface at the bottom of the confluence cylinder, an adjusting rod is threadedly connected to the inner surface of the threaded ring, the adjusting rod is inserted into the surface of the blocking block, and the adjusting rod is inserted into the surface of the confluence cylinder. The threaded ring can cooperate with the adjusting rod to guide the adjusting rod.

[0009] Preferably, an adjusting block is fixedly connected to the bottom end of the adjusting rod, and a placement groove is formed on the surface of the adjusting block. The adjusting block can cooperate with the adjusting rod to facilitate the worker to adjust the adjusting rod.

[0010] Preferably, a third rubber pad is placed on the surface of the placement groove, and the third rubber pad is sleeved on the surface of the threaded ring. The third rubber pad can cooperate with the adjusting rod and the threaded ring to achieve the purpose of leak prevention.

[0011] Compared with the prior art, the advantages and positive effects of the present utility model are as follows:

[0012] 1. In the present utility model, by providing an adjustment device, when the chemical raw material stops being transported, the impact on the closing component caused by the chemical raw material is reduced. The device transports the chemical raw material by guiding the flow of the chemical raw material. Rotate the rotating handle, the rotating handle drives the threaded rod, the threaded rod is guided by the threads on the surface of the closing cover, the closing cover drives the sliding strip, the sliding strip slides and is guided by the guiding groove, the sliding strip slides and drives the blocking block. When the blocking block inserts into the cavity between the two reflux rings, the blocking block blocks the chemical raw material, and the reflux rings block most of the chemical raw material from flowing back. By providing the adjustment device, the situation where the chemical raw material affects the closing component is effectively reduced. When the chemical raw material stops being transported, adjust the adjustment device to avoid a large amount of chemical raw material flowing back and contacting the blocking block, improving the practicality of the check valve, enhancing the auxiliary function of the check valve, increasing the service life of the check valve, and reducing the damage to the interior of the check valve caused by corrosive chemical raw materials. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 FIG.

[0014] Figure 2 FIG. is a schematic structural diagram of an adjustment device of a chemical pipeline check valve proposed by the present utility model;

[0015] Figure 3 FIG. is a chemical pipeline check valve proposed by the present utility model Figure 2 structural schematic diagram at position A;

[0016] Figure 4 FIG. is a schematic structural diagram of a cleaning device of a chemical pipeline check valve proposed by the present utility model;

[0017] Figure 5 FIG. is a chemical pipeline check valve proposed by the present utility model Figure 4 structural schematic diagram at position B.

[0018] LEGEND DESCRIPTION:

[0019] 1. Confluence cylinder; 2. Transportation pipe; 3. Adjustment device; 31. Guiding groove; 32. Blocking block; 33. Closing disc; 34. First rubber pad; 35. Second rubber pad; 36. Threaded rod; 37. Rotating handle; 38. Sliding strip; 39. Reflux ring; 4. Cleaning device; 41. Threaded ring; 42. Third rubber pad; 43. Adjusting rod; 44. Adjusting block; 45. Placing groove; 5. Jacking pipe; 6. Closing cover. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0020] Please refer to Figures 1-5, the present utility model provides a technical solution: a check valve for chemical pipelines, including a confluence cylinder 1, a transport pipe 2, a top pipe 5, a closing cover 6 and an adjusting device 3. The transport pipe 2 is installed on both sides of the confluence cylinder 1, and the transport pipe 2 communicates with the confluence cylinder 1. The top pipe 5 is installed at the bottom end of the confluence cylinder 1, and a closing cover 6 is installed on the surface of the top pipe 5. The top pipe 5 communicates with the confluence cylinder 1. The adjusting device 3 is arranged on the surface of the top pipe 5.

[0021] Next, specifically describe the specific settings and functions of its adjusting device 3 and cleaning device 4.

[0022] In this embodiment: The adjusting device 3 includes a reflux ring 39. Two reflux rings 39 are fixedly connected to the surfaces on both sides of the confluence cylinder 1. The two reflux rings 39 communicate with the confluence cylinder 1. A V-shaped cavity is arranged between the two reflux rings 39. A plug block 32 is placed on the surface of the V-shaped cavity. Above the plug block 32 is provided a threaded rod 36. The threaded rod 36 is threadedly connected to the surface of the closing cover 6. The top end of the threaded rod 36 is fixedly connected to a turning handle 37. A second rubber pad 35 is fixedly connected to the lower surface of the closing cover 6. A first rubber pad 34 is fixedly connected to the upper surface of the closing cover 6. The first rubber pad 34 and the second rubber pad 35 are of the same size.

[0023] Specifically, guiding grooves 31 are formed on the inner surface of the top pipe 5. The two guiding grooves 31 are symmetrically arranged. The top end of the plug block 32 is fixedly connected to a closing disk 33. The closing disk 33 is slidably connected to the surface of the top pipe 5. The guiding grooves 31 can cooperate with the top pipe 5, the closing disk 33, and the plug block 32 to achieve the purpose of guiding the closing disk 33.

[0024] Specifically, a slide bar 38 is fixedly connected to the surface of the closing disk 33. The threaded rod 36 is rotatably connected to the surface of the slide bar 38. The slide bar 38 is slidably connected to the surface of the guiding groove 31.

[0025] In this embodiment: The slide bar 38 can cooperate with the closing disk 33 and the guiding groove 31 to achieve the purpose of restricting the rotation of the plug block 32.

[0026] In this embodiment: A cleaning device 4 is arranged on the surface of the confluence cylinder 1. The cleaning device 4 includes a threaded ring 41. The threaded ring 41 is installed on the surface at the bottom of the confluence cylinder 1. An adjusting rod 43 is threadedly connected to the inner surface of the threaded ring 41. The adjusting rod 43 is inserted into the surface of the plug block 32 and the surface of the confluence cylinder 1. The threaded ring 41 can cooperate with the adjusting rod 43 to achieve the purpose of guiding the adjusting rod 43.

[0027] Specifically, the bottom end of the adjusting rod 43 is fixedly connected to an adjusting block 44. A placing groove 45 is formed on the surface of the adjusting block 44.

[0028] In this embodiment, the adjusting block 44 can cooperate with the adjusting rod 43 to facilitate the worker to adjust the adjusting rod 43.

[0029] Specifically, a third rubber pad 42 is placed on the surface of the placement groove 45, and the third rubber pad 42 is sleeved on the surface of the threaded ring 41.

[0030] In this embodiment, the third rubber pad 42 can cooperate with the adjusting rod 43 and the threaded ring 41 to achieve the purpose of leak prevention.

[0031] Working principle: By setting the adjusting device 3, when the chemical raw material stops being transported, the influence of the chemical raw material on the closing component is reduced. When using the equipment, the equipment transports the chemical raw material by guiding the flow of the chemical raw material. Rotate the turning handle 37, the turning handle 37 drives the threaded rod 36. The threaded rod 36 is guided by the threads on the surface of the closing cover 6, and the closing cover 6 drives the sliding strip 38. The sliding strip 38 slides and is guided by the guiding groove 31. The sliding strip 38 slides and drives the blocking block 32. When the blocking block 32 is inserted into the cavity between the two reflux rings 39, the blocking block 32 blocks the chemical raw material, and the reflux ring 39 blocks most of the chemical raw material from flowing back. By setting the adjusting device 3, the situation that the chemical raw material affects the closing component is effectively reduced. When the chemical raw material stops being transported, adjust the adjusting device 3 to avoid a large amount of chemical raw material flowing back and contacting the blocking block 32, improving the practicality of the check valve, improving the auxiliary performance of the check valve, increasing the service life of the check valve, and reducing the damage caused by corrosive chemical raw materials to the inside of the check valve. Additionally, by setting the cleaning device 4, when the chemical raw material stops being transported, the residual chemical raw material inside the cavity is cleaned. When using the equipment, the equipment transports the chemical raw material by guiding the flow of the chemical raw material. Rotate the adjusting block 44, the adjusting block 44 loses its restraint on the third rubber pad 42, the adjusting block 44 drives the adjusting rod 43, and the adjusting rod 43 disengages from the threaded ring 41. The threaded ring 41 guides the residual material to flow out. By setting the cleaning device 4, the residual chemical raw material inside the cavity is effectively cleaned. When the chemical raw material stops being transported, adjust the cleaning device 4 to avoid the residual chemical raw material contacting the check valve for a long time, improving the practicality of the check valve, improving the auxiliary performance of the check valve, increasing the hygiene index of the check valve, reducing the situation of blockage of the check valve, and improving the convenience for the worker to clean the check valve.

Claims

1. A check valve for a chemical pipeline, comprising a confluence cylinder (1), a transport pipe (2), a top pipe (5), a closing cover (6) and an adjusting device (3), characterized in that: The transportation pipe (2) is installed on both sides of the confluence cylinder (1). The transportation pipe (2) communicates with the confluence cylinder (1). The jacking pipe (5) is installed at the bottom end of the confluence cylinder (1). A closing cover (6) is installed on the surface of the jacking pipe (5). The jacking pipe (5) communicates with the confluence cylinder (1). The adjusting device (3) is arranged on the surface of the jacking pipe (5). The adjusting device (3) includes a reflux ring (39). The two reflux rings (39) are fixedly connected to the surfaces on both sides of the confluence cylinder (1). The two reflux rings (39) communicate with the confluence cylinder (1). A V-shaped cavity is arranged between the two reflux rings (39). A blocking block (32) is placed on the surface of the V-shaped cavity. A threaded rod (36) is arranged above the blocking block (32). The threaded rod (36) is threadedly connected to the surface of the closing cover (6). The top end of the threaded rod (36) is fixedly connected to a turning handle (37). A second rubber pad (35) is fixedly connected to the lower surface of the closing cover (6). A first rubber pad (34) is fixedly connected to the upper surface of the closing cover (6). The first rubber pad (34) and the second rubber pad (35) are of the same size.

2. The check valve for chemical pipelines according to claim 1, characterized in that: Guide grooves (31) are formed on the inner surface of the jacking pipe (5). The two guide grooves (31) are symmetrically arranged. A closing disc (33) is fixedly connected to the top end of the blocking block (32). The closing disc (33) is slidably connected to the surface of the jacking pipe (5).

3. The check valve for chemical pipelines according to claim 2, characterized in that: A sliding strip (38) is fixedly connected to the surface of the closing disc (33). The threaded rod (36) is rotatably connected to the surface of the sliding strip (38). The sliding strip (38) is slidably connected to the surface of the guide groove (31).

4. A chemical pipeline check valve according to claim 1, characterized in that: A cleaning device (4) is arranged on the surface of the confluence cylinder (1). The cleaning device (4) includes a threaded ring (41). The threaded ring (41) is installed on the surface at the bottom of the confluence cylinder (1). An adjusting rod (43) is threadedly connected to the inner surface of the threaded ring (41). The adjusting rod (43) is inserted into the surface of the blocking block (32). The adjusting rod (43) is inserted into the surface of the confluence cylinder (1).

5. The check valve for chemical pipelines according to claim 4, characterized in that: An adjusting block (44) is fixedly connected to the bottom end of the adjusting rod (43). A placing groove (45) is formed on the surface of the adjusting block (44).

6. The check valve for chemical pipelines according to claim 5, characterized in that: A third rubber pad (42) is placed on the surface of the placing groove (45). The third rubber pad (42) is sleeved on the surface of the threaded ring (41).

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