Guiding device for preventing valve rod and connecting block of regulating valve from rotating

Abstract

The utility model discloses a guide device for preventing a valve rod and a connecting block of a regulating valve from rotating, which relates to the technical field of regulating valves, and comprises a guide device, a valve body is arranged below the guide device, the guide device comprises a valve frame, the valve frame is fixedly arranged on the top surface of the valve body, a connecting block body is arranged in the valve frame in a sliding manner, and the connecting block body is connected with the guide device. Supporting rods are fixedly arranged on the two sides of the connecting block body, balls are rotatably arranged in the two ends of each supporting rod, a valve rod body is welded to the bottom end of the connecting block body, the valve rod body is slidably inserted into a valve body, a valve element is fixedly arranged at the bottom end of the valve rod body, and when the valve body is opened, the connecting block body drives the valve rod body to ascend, and the valve element is inserted into the valve body. In the ascending process of the connecting block body, the supporting rod slides in the valve frame, so that the situation that the connecting block body drives the valve rod body and the valve element to move up and down due to the rotating tangential force of the connecting block body can be prevented, and the situation that the opening degree of the valve is affected, the valve element falls off and unnecessary consequences are caused is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of regulating valves, in particular to a guiding device for preventing a regulating valve stem and a connecting block from rotating. Background Art

[0002] A regulating valve is a valve used to adjust process parameters such as medium flow, pressure, temperature, liquid level, etc. in the field of industrial automation process control. It automatically adjusts the valve opening according to the control signal in the automation system, thereby achieving the regulation of medium flow, pressure, temperature and liquid level.

[0003] However, when most of the existing regulating valves are opened, the fluid changes from laminar flow to turbulent flow, resulting in large pulsating pressure and local high energy loss, which induces vibration. The valve core is affected by the tangential stress, which drives the valve stem and the connecting block to rotate, thereby affecting the opening of the valve. In severe cases, the valve core may fall off, causing unnecessary consequences. In view of the above problems, the inventor proposes a guide device to prevent the valve stem and the connecting block of the regulating valve from rotating to solve the above problems. Utility Model Content

[0004] In order to solve the problem that due to the transformation of fluid from laminar flow to turbulent flow, large pulsating pressure and local high energy loss are generated, which induces vibration, causes the valve core to be affected by tangential stress, drives the valve stem and the connecting block to rotate, and further affects the opening of the valve, and in severe cases causes the valve core to fall off, resulting in unnecessary consequences; the purpose of the utility model is to provide a guide device to prevent the valve stem and the connecting block of the regulating valve from rotating.

[0005] In order to solve the above technical problems, the utility model adopts the following technical solutions: a guiding device for preventing the valve stem and the connecting block of the regulating valve from rotating, comprising a guiding device, a valve body is arranged below the guiding device, the guiding device comprises a valve frame, a valve frame is fixedly arranged on the top surface of the valve body, a connecting block body is slidably arranged in the valve frame, support rods are fixedly arranged on both sides of the connecting block body, balls are rotatably arranged in the two ends of the support rods, a valve stem body is welded to the bottom end of the connecting block body, the valve stem body is slidably inserted in the valve body, a valve core is fixedly arranged at the bottom end of the valve stem body, a sliding groove is opened in the valve frame, the support rod is slidably arranged in the sliding groove, and the valve A rolling groove is provided in the door frame, and the ball is slidably arranged in the rolling groove. First, the cam is rotated by rotating the rotating shaft. When the cam contacts the fixed plate, the fixed plate drives the limiter to move, and the slide rod is slidably inserted into the mounting plate, and the spring is squeezed. At the same time, the gear and the slot are disengaged, and then the threaded rod is rotated to enable the connecting block body to move up and down. The threaded rod and the connecting block body are connected by a bearing, so that the valve body can be opened and closed. After the valve is opened, the rotating shaft is rotated to disengage the cam from the fixed plate, so that the spring is reset, and then the slot is meshed with the gear, so as to prevent the threaded rod from being accidentally touched or self-rotated, resulting in an increase or decrease in the opening of the valve, affecting the use of the valve body;

[0006] When the valve body is opened, the connecting block body drives the valve stem body to rise, thereby causing the valve core to rise and detach from the valve seat, thereby opening the valve body. During the rising process of the connecting block body, the support rod slides in the valve frame, thereby preventing the connecting block body from rotating due to tangential force. The connecting block body carries the valve stem body and the valve core to keep moving up and down, avoiding affecting the opening of the valve, causing the valve core to fall off, and causing unnecessary consequences. When the support rod slides in the slide groove, the ball can roll in the rolling groove to ensure that the switching stroke of the connecting block body is smooth and not stuck.

[0007] Preferably, a threaded tube is fixedly passed through the valve frame, a threaded rod is inserted into the thread of the threaded tube, the bottom end of the threaded rod is rotatably connected to the top surface of the connecting block body, a mounting plate is fixedly provided on the top surface of the valve frame, a sliding rod is movably passed through the mounting plate, a limit piece is fixedly provided at one end of the sliding rod, fixing plates are fixedly provided on both sides of the limit piece, a spring is fixedly connected between the mounting plate and the limit piece, a gear is fixedly sleeved on the outer surface of the threaded rod, a slot is provided in the limit piece, the gear is clamped in the slot, a vertical plate is fixedly provided on the top surface of the valve frame, a rotating shaft is rotatably passed through the vertical plate, and a cam is fixedly provided at one end of the rotating shaft.

[0008] Preferably, a collar is fixedly sleeved on the outer surface of the valve stem body, a travel pointer is fixedly provided on the outer surface of the collar, and a travel scale line is fixedly provided inside the valve frame.

[0009] Preferably, flanges are fixedly provided at both ends of the valve body, a valve seat is fixedly provided in the valve body, and the valve core is slidably inserted in the valve seat.

[0010] Compared with the prior art, the beneficial effects of the utility model are:

[0011] 1. In the utility model, when the valve body is opened, the connecting block body drives the valve stem body to rise. During the rising process of the connecting block body, the support rod slides in the valve frame, thereby preventing the connecting block body from rotating tangential force. The connecting block body keeps moving up and down with the valve stem body and the valve core, avoiding affecting the opening of the valve, causing the valve core to fall off, and causing unnecessary consequences;

[0012] 2. In the utility model, after the valve is opened, the rotating shaft is rotated so that the cam is disengaged from the fixed plate, the spring is reset, and then the slot is engaged with the gear, thereby preventing the threaded rod from being accidentally touched or rotating, resulting in an increase or decrease in the opening of the valve, affecting the use of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0014] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0015] Figure 2 This is a schematic diagram of a partial cross-sectional structure of a valve body of the utility model;

[0016] Figure 3 This is a partial cross-sectional structural diagram of the valve frame of the utility model;

[0017] Figure 4 This is a schematic diagram of the threaded rod structure of the utility model;

[0018] Figure 5 This is a schematic diagram of the structure of the limiter of the utility model.

[0019] In the figure: 1. valve body; 11. flange; 12. valve seat; 13. valve core; 14. valve stem body; 15. collar; 16. travel pointer; 2. valve frame; 201. slide groove; 202. rolling groove; 21. connecting block body; 22. support rod; 23. ball; 24. threaded rod; 25. threaded pipe; 26. gear; 27. travel scale line; 3. mounting plate; 31. slide rod; 32. spring; 33. limiter; 331. slot; 34. fixing plate; 4. vertical plate; 41. rotating shaft; 42. cam. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] Example: Figure 1-5 As shown, the utility model provides a guiding device for preventing a valve stem and a connecting block of a regulating valve from rotating, comprising a guiding device, a valve body is arranged below the guiding device, the guiding device comprises a valve frame, a valve frame 2 is fixedly arranged on the top surface of the valve body 1, a connecting block body 21 is slidably arranged in the valve frame 2, support rods 22 are fixedly arranged on both sides of the connecting block body 21, balls 23 are rotatably arranged in both ends of the support rod 22, a valve stem body 14 is welded to the bottom end of the connecting block body 21, the valve stem body 14 is slidably inserted in the valve body 1, a valve core 13 is fixedly arranged at the bottom end of the valve stem body 14, a slide groove 201 is opened in the valve frame 2, the support rod 22 is slidably arranged in the slide groove 201, and a rolling groove 201 is opened in the valve frame 2 2. The ball 23 slides in the rolling groove 202. When the valve body 1 is opened, the connecting block body 21 drives the valve stem body 14 to rise, thereby causing the valve core 13 to rise and be able to detach from the valve seat 12, thereby opening the valve body 1. During the rising process of the connecting block body 21, the support rod 22 slides in the valve frame 2, thereby preventing the connecting block body 21 from rotating tangential force. The connecting block body 21 keeps moving up and down with the valve stem body 14 and the valve core 13, avoiding affecting the opening of the valve and causing the valve core 13 to fall off, resulting in unnecessary consequences. When the support rod 22 slides in the slide groove 201, the ball 23 can roll in the rolling groove 202, ensuring that the switching stroke of the connecting block body 21 is smooth and not stuck.

[0022] A threaded tube 25 is fixedly passed through the valve frame 2, and a threaded rod 24 is inserted into the threaded tube 25. The bottom end of the threaded rod 24 is rotatably connected to the top surface of the connecting block body 21. A mounting plate 3 is fixedly provided on the top surface of the valve frame 2. A sliding rod 31 is movably passed through the mounting plate 3. A limiting member 33 is fixedly provided at one end of the sliding rod 31. Fixed plates 34 are fixedly provided on both sides of the limiting member 33. A spring 32 is fixedly connected between the mounting plate 3 and the limiting member 33. A gear 26 is fixedly sleeved on the outer surface of the threaded rod 24. A slot 331 is provided in the limiting member 33. The gear 26 is clamped in the slot 331. A vertical plate 4 is fixedly provided on the top surface of the valve frame 2. A rotating shaft 41 is rotatably passed through the vertical plate 4. A cam 42 is fixedly provided at one end of the rotating shaft 41.

[0023] By adopting the above technical solution, the cam 42 is rotated by rotating the rotating shaft 41. When the cam 42 contacts the fixed plate 34, the fixed plate 34 drives the limiter 33 to move, and the slide rod 31 is slidably inserted into the mounting plate 3, and the spring 32 is squeezed. At the same time, the gear 26 and the slot 331 are disengaged, and then the threaded rod 24 is rotated to enable the connecting block body 21 to move up and down. The threaded rod 24 and the connecting block body 21 are connected by a bearing, so that the valve body 1 can be opened and closed. After the valve is opened, the rotating shaft 41 is rotated to disengage the cam 42 from the fixed plate 34, so that the spring 32 is reset, and then the slot 331 is engaged with the gear 26, so as to prevent the threaded rod 24 from being accidentally touched or rotated, resulting in an increase or decrease in the opening of the valve, affecting the use of the valve body 1.

[0024] A collar 15 is fixedly sleeved on the outer surface of the valve stem body 14 , a travel pointer 16 is fixedly mounted on the outer surface of the collar 15 , and a travel scale line 27 is fixedly mounted inside the valve frame 2 .

[0025] By adopting the above technical solution, when the valve is opened, the valve stem body 14 will drive the travel pointer 16 to move and point to the travel scale line 27, so that the degree of valve opening can be observed.

[0026] Flanges 11 are fixedly provided at both ends of the valve body 1 , a valve seat 12 is fixedly provided inside the valve body 1 , and a valve core 13 is slidably inserted in the valve seat 12 .

[0027] By adopting the above technical solution, a first sealing ring is fixedly provided in the valve seat 12, and a second sealing ring is fixedly provided on the bottom surface of the valve core 13, so that after the valve core 13 is inserted into the valve seat 12, the second sealing ring can fit tightly on the top surface of the first sealing ring, thereby being able to seal between the valve seat 12 and the valve core 13.

[0028] Working principle: First, by rotating the rotating shaft 41, the cam 42 rotates. When the cam 42 contacts the fixed plate 34, the fixed plate 34 drives the limiter 33 to move, and the slide rod 31 slides and inserts into the mounting plate 3, and squeezes the spring 32. At the same time, the gear 26 and the slot 331 are disengaged, and then the threaded rod 24 is rotated to enable the connecting block body 21 to move up and down. The threaded rod 24 and the connecting block body 21 are connected by a bearing, so that the valve body 1 can be opened and closed. After the valve is opened, the rotating shaft 41 is rotated to disengage the cam 42 from the fixed plate 34, so that the spring 32 is reset, and then the slot 331 is meshed with the gear 26, so as to prevent the threaded rod 24 from being accidentally touched or rotating, resulting in an increase or decrease in the opening of the valve, affecting the use of the valve body 1;

[0029] When the valve body 1 is opened, the connecting block body 21 drives the valve stem body 14 to rise, thereby causing the valve core 13 to rise and be able to detach from the valve seat 12, thereby opening the valve body 1. During the rising process of the connecting block body 21, the support rod 22 slides in the valve frame 2, thereby preventing the connecting block body 21 from rotating tangential force. The connecting block body 21 keeps moving up and down with the valve stem body 14 and the valve core 13 to avoid affecting the opening of the valve, causing the valve core 13 to fall off, and causing unnecessary consequences. When the support rod 22 slides in the slide groove 201, the ball 23 can roll in the rolling groove 202 to ensure that the switching stroke of the connecting block body 21 is smooth and not stuck.

[0030] Finally, it should be noted that the above are only preferred examples of the utility model and are not intended to limit the utility model. Although the utility model is described in detail with reference to the above embodiments, those skilled in the art can still modify the technical solutions recorded in the above embodiments or replace some of the technical features therein by equivalents. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the utility model shall be included in the protection scope of the utility model.

Claims

1. A guide device for preventing a valve stem and a connecting block of a regulating valve from rotating, comprising a guide device, a valve body (1) is arranged below the guide device, and the guide device comprises a valve frame (2), characterized in that: A valve frame (2) is fixedly provided on the top surface of the valve body (1), a connecting block body (21) is slidably provided in the valve frame (2), support rods (22) are fixedly provided on both sides of the connecting block body (21), balls (23) are rotatably provided in both ends of the support rods (22), a valve stem body (14) is welded to the bottom end of the connecting block body (21), the valve stem body (14) is slidably inserted in the valve body (1), a valve core (13) is fixedly provided at the bottom end of the valve stem body (14), a sliding groove (201) is provided in the valve frame (2), the support rod (22) is slidably provided in the sliding groove (201), a rolling groove (202) is provided in the valve frame (2), and the ball (23) is slidably provided in the rolling groove (202).

2. A guide device for preventing the valve stem and the connecting block of a regulating valve from rotating as claimed in claim 1, characterized in that: A threaded tube (25) is fixedly passed through the valve frame (2), a threaded rod (24) is inserted into the threaded tube (25), and the bottom end of the threaded rod (24) is rotatably connected to the top surface of the connection block body (21).

3. A guide device for preventing the valve stem and the connecting block of a regulating valve from rotating as claimed in claim 2, characterized in that: A mounting plate (3) is fixedly provided on the top surface of the valve frame (2), a slide rod (31) movably passes through the mounting plate (3), a limit piece (33) is fixedly provided at one end of the slide rod (31), fixing plates (34) are fixedly provided on both sides of the limit piece (33), and a spring (32) is fixedly connected between the mounting plate (3) and the limit piece (33).

4. A guide device for preventing the valve stem and the connecting block of a regulating valve from rotating as claimed in claim 3, characterized in that: A gear (26) is fixedly sleeved on the outer surface of the threaded rod (24), a slot (331) is provided in the limiting member (33), and the gear (26) is clamped in the slot (331).

5. A guide device for preventing the valve stem and the connecting block of a regulating valve from rotating as claimed in claim 1, characterized in that: A collar (15) is fixedly sleeved on the outer surface of the valve stem body (14), a travel pointer (16) is fixedly mounted on the outer surface of the collar (15), and a travel scale line (27) is fixedly mounted inside the valve frame (2).

6. A guide device for preventing the valve stem and the connecting block of a regulating valve from rotating as claimed in claim 1, characterized in that: A vertical plate (4) is fixedly provided on the top surface of the valve frame (2), a rotating shaft (41) is rotatably penetrated in the vertical plate (4), and a cam (42) is fixedly provided at one end of the rotating shaft (41).

7. A guide device for preventing a regulating valve stem and a connecting block from rotating as claimed in claim 1, characterized in that: Flanges (11) are fixedly provided at both ends of the valve body (1), a valve seat (12) is fixedly provided inside the valve body (1), and the valve core (13) is slidably inserted in the valve seat (12).

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