Flow-adjustable multi-stage throttling device

Abstract

The utility model discloses a flow-adjustable multistage throttling device which comprises a valve body, a valve rod is arranged at the top of the valve body, an upper valve seat is arranged in the valve body, a lower valve seat located below the upper valve seat is arranged in the valve body, a first valve element located above the upper valve seat is arranged at the bottom of the valve rod, and a second valve element located above the lower valve seat is arranged at the bottom of the valve rod. A downward pressing ejector rod is fixedly installed at the bottom of the first valve element, a connecting sleeve is integrally arranged at the bottom of the lower valve seat, a rotating sleeve is rotationally connected into the connecting sleeve, an adjusting knob located outside the valve rod is integrally arranged at the bottom of the rotating sleeve, and the adjusting knob is rotationally connected with the bottom of the valve body in a sealed mode. A threaded sleeve is slidably connected into the rotating sleeve, and a jacking spring is arranged at the bottom of the threaded sleeve. The rotating sleeve rotates to drive the threaded sleeve to rotate, so that the threaded rod drives the second valve element to move again, and accurate control over the flow in the valve body is completed.

Description

Technical Field

[0001] This utility model relates to the field of valve throttling technology, specifically to a multi-stage throttling device with adjustable flow rate. Background Technology

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and regulate and control the parameters of the transported medium. Valves are control components in fluid transport systems, with functions such as shut-off, regulation, flow diversion, backflow prevention, pressure stabilization, flow splitting, or overflow pressure relief. Valves used in fluid control systems range from the simplest shut-off valves to various valves used in extremely complex automatic control systems, with a wide variety of types and specifications.

[0003] Most existing valves control their opening, closing, and flow rate by rotating a valve plate. However, the rotation range of the valve plate is difficult to accurately determine, resulting in significant errors in the actual flow rate.

[0004] Therefore, we propose a multi-stage flow-adjustable throttling device. Utility Model Content

[0005] The purpose of this invention is to provide a flow-adjustable multi-stage throttling device to solve the problems mentioned in the background art.

[0006] To achieve the above objectives, this utility model provides the following technical solution: a flow-adjustable multi-stage throttling device, comprising a valve body, a valve stem at the top of the valve body, an upper valve seat inside the valve body, a lower valve seat below the upper valve seat inside the valve body, a first valve core above the upper valve seat at the bottom of the valve stem, a downward pressure rod fixedly installed at the bottom of the first valve core, a connecting sleeve integrally provided at the bottom of the lower valve seat, a rotating sleeve rotatably connected inside the connecting sleeve, an adjusting knob integrally provided at the bottom of the rotating sleeve outside the valve stem, the adjusting knob being rotatably and sealingly connected to the bottom of the valve body, a threaded sleeve slidably connected inside the rotating sleeve, a lifting spring at the bottom of the threaded sleeve, a threaded rod threadedly connected through the middle of the threaded sleeve, a second valve core fixedly installed above the lower valve seat at the top of the threaded rod, and a buffer block provided at the top of the second valve core.

[0007] Optionally, a handwheel is fixedly installed on the top of the valve stem, an inlet is provided at the bottom of the valve body, an outlet is provided at the top of the side of the valve body, and the valve stem, the first valve core, the upper valve seat, and the lower pressure rod are arranged coaxially.

[0008] Optionally, the lower valve seat, threaded rod, and rotating sleeve are arranged coaxially, the top of the rotating sleeve is flush with the top of the connecting sleeve, and the diameter of the rotating sleeve is the same as the inner diameter of the connecting sleeve.

[0009] Optionally, the outer circumferential surface of the threaded sleeve is integrally connected with a limiting protrusion, and the inner wall of the rotating sleeve is provided with a limiting groove, wherein the limiting protrusion is slidably connected to the inside of the limiting groove.

[0010] Optionally, the top of the lifting spring is in close contact with the bottom of the threaded sleeve, and the bottom of the lifting spring is in close contact with the bottom of the rotating sleeve.

[0011] Optionally, the outer circumferential surface of the threaded rod is provided with a sliding groove, the threaded rod is slidably connected to the middle part of the lower valve seat, and the middle part of the lower valve seat is provided with a protrusion that is slidably connected to the inside of the sliding groove.

[0012] Optionally, the buffer block is located directly below the downward pressing rod, and the diameter of the buffer block is larger than the diameter of the downward pressing rod.

[0013] Compared with the prior art, the beneficial effects of this utility model are:

[0014] 1. This flow-adjustable multi-stage throttling device, by setting a first valve core and a second valve core, rotates the handwheel, causing the valve stem to move the first valve core, thereby adjusting the distance between the first valve core and the upper valve seat. At the same time, the downward pressing rod pushes the buffer block and the second valve core downward, and the first and second valve cores move down synchronously, roughly adjusting the flow in the valve body. Then, rotating the adjustment knob causes the rotating sleeve to rotate, which in turn drives the threaded sleeve to rotate, causing the threaded rod to drive the second valve core to move again, thus completing the precise control of the flow in the valve body.

[0015] 2. This flow-adjustable multi-stage throttling device, by setting a lifting spring, when the first valve core is adjusted, the downward push rod pushes the second valve core to move down, thereby driving the threaded rod and threaded sleeve to move along the limit slide groove. When the first valve core is fully closed with the upper valve seat, the downward push rod pushes the second valve core to close with the lower valve seat, so that the first valve core and the second valve core move synchronously. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the overall structure of a flow-adjustable multi-stage throttling device according to the present invention;

[0017] Figure 2 This is a schematic diagram of the lower valve seat of a flow-adjustable multi-stage throttling device according to the present invention;

[0018] Figure 3 This is a schematic diagram of the rotating sleeve of a flow-adjustable multi-stage throttling device according to the present invention;

[0019] Figure 4 This is a schematic diagram of the threaded sleeve of a flow-adjustable multi-stage throttling device according to the present invention.

[0020] In the diagram: 1. Valve body; 2. Inlet; 3. Outlet; 4. Valve stem; 5. Handwheel; 6. First valve core; 7. Upper valve seat; 8. Lower valve seat; 9. Connecting sleeve; 10. Rotating sleeve; 11. Adjusting knob; 12. Threaded sleeve; 13. Threaded rod; 14. Second valve core; 15. Lifting spring; 16. Buffer block; 17. Downward pressing rod; 18. Limiting groove; 19. Limiting protrusion. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1 to 4 This utility model provides a flow-adjustable multi-stage throttling device, including a valve body 1, a valve stem 4 at the top of the valve body 1, an upper valve seat 7 inside the valve body 1, a lower valve seat 8 below the upper valve seat 7 inside the valve body 1, a first valve core 6 above the upper valve seat 7 at the bottom of the valve stem 4, a downward pressure rod 17 fixedly installed at the bottom of the first valve core 6, a connecting sleeve 9 integrally provided at the bottom of the lower valve seat 8, a rotating sleeve 10 rotatably connected inside the connecting sleeve 9, an adjusting knob 11 integrally provided at the bottom of the rotating sleeve 10 outside the valve stem 4, the adjusting knob 11 being rotatably and sealingly connected to the bottom of the valve body 1, a threaded sleeve 12 slidably connected inside the rotating sleeve 10, a lifting spring 15 at the bottom of the threaded sleeve 12, and the threaded sleeve 12... A threaded rod 13 is threadedly connected through the middle of sleeve 12. A second valve core 14 located above the lower valve seat 8 is fixedly installed on the top of the threaded rod 13. A buffer block 16 is provided on the top of the second valve core 14. By setting the first valve core 6 and the second valve core 14, rotating the handwheel 5 causes the valve rod 4 to move the first valve core 6, thereby adjusting the distance between the first valve core 6 and the upper valve seat 7. At the same time, the downward pressing rod 17 pushes the buffer block 16 and the second valve core 14 downward. The first valve core 6 and the second valve core 14 move downward synchronously, roughly adjusting the flow rate in the valve body 1. Then, rotating the adjusting knob 11 causes the rotating sleeve 10 to rotate, thereby driving the threaded sleeve 12 to rotate, causing the threaded rod 13 to drive the second valve core 14 to move again, completing the precise control of the flow rate in the valve body 1.

[0023] A handwheel 5 is fixedly installed on the top of the valve stem 4, an inlet 2 is provided at the bottom of the valve body 1, and an outlet 3 is provided on the top of the side of the valve body 1. The valve stem 4, the first valve core 6, the upper valve seat 7, and the lower pressure rod 17 are arranged coaxially.

[0024] The lower valve seat 8, threaded rod 13, and rotating sleeve 10 are arranged coaxially. The top of the rotating sleeve 10 is flush with the top of the connecting sleeve 9, and the diameter of the rotating sleeve 10 is the same as the inner diameter of the connecting sleeve 9.

[0025] The outer circumferential surface of the threaded sleeve 12 is integrally connected with a limiting protrusion 19. The inner wall of the rotating sleeve 10 is provided with a limiting groove 18. The limiting protrusion 19 and the limiting groove 18 are slidably connected. By setting a lifting spring 15, when the first valve core 6 is adjusted, the downward push rod pushes the second valve core 14 to move down, thereby driving the threaded rod 13 and the threaded sleeve 12 to move along the limiting groove 18. When the first valve core 6 and the upper valve seat 7 are completely closed, the downward push rod 17 pushes the second valve core 14 to close, so that the first valve core 6 and the second valve core 14 move synchronously.

[0026] The top of the lifting spring 15 is in close contact with the bottom of the threaded sleeve 12, and the bottom of the lifting spring 15 is in close contact with the bottom of the rotating sleeve 10.

[0027] The outer circumferential surface of the threaded rod 13 is provided with a sliding groove, and the threaded rod 13 is slidably connected to the middle part of the lower valve seat 8. The middle part of the lower valve seat 8 is provided with a protrusion that is slidably connected to the inside of the sliding groove.

[0028] The buffer block 16 is located directly below the downward pressing rod 17, and the diameter of the buffer block 16 is larger than the diameter of the downward pressing rod 17.

[0029] Working principle:

[0030] Turning the handwheel 5 causes the valve stem 4 to move the first valve core 6, thereby adjusting the distance between the first valve core 6 and the upper valve seat 7. At the same time, the downward push rod 17 pushes the buffer block 16 and the second valve core 14 downward. The first valve core 6 and the second valve core 14 move downward synchronously, roughly adjusting the flow rate in the valve body 1. Then, turning the adjustment knob 11 causes the rotating sleeve 10 to rotate, thereby driving the threaded sleeve 12 to rotate. This causes the threaded rod 13 to drive the second valve core 14 to move again, completing the precise control of the flow rate in the valve body 1. When adjusting the first valve core 6, the downward push rod pushes the second valve core 14 downward, thereby driving the threaded rod 13 and the threaded sleeve 12 to move along the limiting slide groove 18. When the first valve core 6 and the upper valve seat 7 are completely closed, the downward push rod 17 pushes the second valve core 14 to close, causing the first valve core 6 and the second valve core 14 to move synchronously.

[0031] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A flow adjustable multi-stage throttling device comprising a valve body (1), characterized in that, The top of the valve body (1) is provided with a valve stem (4), the inside of the valve body (1) is provided with an upper valve seat (7), the inside of the valve body (1) is provided with a lower valve seat (8) below the upper valve seat (7), the bottom of the valve stem (4) is provided with a first valve core (6) above the upper valve seat (7), the bottom of the first valve core (6) is fixedly installed with a downward pressing jack (17), the bottom of the lower valve seat (8) is integrally provided with a connecting sleeve (9), the inside of the connecting sleeve (9) is rotatably connected with a rotating sleeve (10), the bottom of the rotating sleeve (10) is integrally provided with an adjusting knob (11) outside the valve stem (4), the adjusting knob (11) is sealingly and rotatably connected with the bottom of the valve body (1), the inside of the rotating sleeve (10) is slidably connected with a threaded sleeve (12), the bottom of the threaded sleeve (12) is provided with a jacking spring (15), the middle part of the threaded sleeve (12) is threadedly connected with a threaded rod (13), the top of the threaded rod (13) is fixedly installed with a second valve core (14) above the lower valve seat (8), and the top of the second valve core (14) is provided with a buffer block (16).

2. The flow adjustable multi-stage throttling device of claim 1, wherein, The top of the valve stem (4) is fixedly installed with a hand wheel (5), the bottom of the valve body (1) is provided with a liquid inlet (2), and the top of the side of the valve body (1) is provided with a liquid outlet (3). The valve stem (4), the first valve core (6), the upper valve seat (7) and the downward pressing jack (17) are coaxially arranged.

3. The flow adjustable multi-stage throttling device of claim 1, wherein, The lower valve seat (8), the threaded rod (13) and the rotating sleeve (10) are coaxially arranged, the top of the rotating sleeve (10) is flush with the top of the connecting sleeve (9), and the diameter of the rotating sleeve (10) is the same as the inner diameter of the connecting sleeve (9).

4. The flow adjustable multi-stage throttling device of claim 1, wherein, The outer circumferential surface of the threaded sleeve (12) is integrally connected with a limiting convex strip (19), the inner wall of the rotating sleeve (10) is provided with a limiting sliding groove (18), and the limiting convex strip (19) is slidably connected with the inside of the limiting sliding groove (18).

5. The flow adjustable multi-stage throttling device of claim 1, wherein, The top of the jacking spring (15) is in abutting contact with the bottom of the threaded sleeve (12), and the bottom of the jacking spring (15) is in abutting arrangement with the bottom of the rotating sleeve (10).

6. The flow adjustable multi-stage throttling device of claim 1, wherein, The outer circumferential surface of the threaded rod (13) is provided with a sliding groove, the middle part of the threaded rod (13) penetrates and slidably connects with the lower valve seat (8), and the middle part of the lower valve seat (8) is provided with a convex block slidably connected with the inside of the sliding groove.

7. The flow adjustable multi-stage throttling device of claim 1, wherein, The buffer block (16) is located directly below the downward pressing jack (17), and the diameter of the buffer block (16) is greater than the diameter of the downward pressing jack (17).

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