Concealed handwheel mechanism for regulating valve

Abstract

The application discloses a hidden hand wheel mechanism of a regulating valve, which comprises a connecting piece and a transmission piece. The transmission piece comprises a transmission rod and a hand wheel seat for driving the transmission rod. The side wall of the hand wheel seat is provided with at least a pair of oppositely arranged first connecting grooves and second connecting grooves which are of the same structure. The first connecting grooves and the second connecting grooves are respectively connected with first wheel bodies and second wheel bodies which are provided with driven parts at two ends and driving parts at two ends. The first wheel bodies and the second wheel bodies are respectively provided with at least two first connecting rods and second connecting rods which extend into the first connecting grooves and the second connecting grooves. The first connecting rods and the second connecting rods move horizontally and oppositely in the first connecting grooves and the second connecting grooves so that the first wheel bodies and the second wheel bodies are fixed to become the hand wheel or move horizontally and oppositely to separate and hide into one side of the connecting piece. The hand wheel mechanism is convenient to disassemble and hide. When the regulating valve needs to be controlled, the hand wheel mechanism is convenient to install, and the stability of the hand wheel mechanism after installation is good.

Description

Technical Field

[0001] This invention relates to the field of regulating valve technology, and in particular to a concealed handwheel mechanism for regulating valves. Background Technology

[0002] Control valves are widely used industrial process control instruments in petroleum, chemical, power, and metallurgical industries. They consist of an actuator and a valve body. The actuator is the thrust component of the control valve and can be electric or pneumatic. It generates a corresponding thrust based on the magnitude of the control signal pressure, pushing the valve body to move. The valve body directly contacts the regulating medium, regulating the flow rate of the fluid. Most control valves are equipped with a handwheel mechanism on top of the actuator. When the signal of the electric or pneumatic actuator malfunctions, or when some components of the actuator are damaged, it is necessary to switch from automatic to manual operation. In this case, the handwheel mechanism is used to achieve the regulating function of the control valve. When using the handwheel mechanism to achieve the regulating function of the control valve, the operator needs to turn the handwheel. The transmission rod fixedly connected to the handwheel will rotate with the handwheel, and the handwheel and transmission rod will rotate upward or downward together to drive the valve stem.

[0003] However, the handwheel mechanism of the regulating valve is exposed and easily manipulated or accidentally touched. If the handwheel is accidentally turned, the regulating valve will be activated, affecting its normal operation. To prevent accidental operation or touch, the handwheel mechanism needs to be locked or hidden. Patent document CN209294538U discloses "a foldable and concealable valve handwheel," which, through the design of the handwheel disc and the pushing device, allows the pushing device to rotate automatically. When not in use, simply releasing the handwheel returns it to a vertical position without affecting the rotation of the handwheel disc. However, there are some problems with this solution: Firstly, the handwheel is not easy to operate because the pusher can return to a vertical position simply by releasing the hand when not in use. When operating the handwheel once, the operator needs to pick up the pusher multiple times to rotate it to a horizontal position, which is time-consuming and laborious, and not convenient for continuous operation of the handwheel. Secondly, when the hand grip plate and the pusher plate are fixed by the fixing device, the fixing effect is not good, the stability of the handwheel when rotating is poor, and it cannot limit the position of the handwheel after rotation. Summary of the Invention

[0004] To address the aforementioned technical problems in the existing technology, the present invention provides a handwheel mechanism that is easy to operate and conceal, and has good stability and limiting effect. The technical solution of the present invention is as follows.

[0005] This invention discloses a concealed handwheel mechanism for a regulating valve, comprising a connector located at the upper end of a pneumatic diaphragm actuator and a transmission component located at the upper end of the connector. The transmission component includes a transmission rod connected to a push rod of the pneumatic diaphragm actuator via the connector and a handwheel seat that drives the transmission rod. The side wall of the handwheel seat is provided with at least a pair of opposing first and second connecting slots of identical structure. The first and second connecting slots are respectively connected to a retractable first wheel body with driven members at both ends and a second wheel body with driving members at both ends. The first and second wheel bodies are respectively provided with at least two first and second connecting rods extending into the first and second connecting slots. The first and second connecting rods move horizontally in opposite directions within the first and second connecting slots to fix the first and second wheel bodies into a handwheel or move horizontally in opposite directions to separate the first and second wheel bodies and conceal them to one side of the connector.

[0006] As a further technical solution, the first connecting groove includes support portions on both sides for supporting the first connecting rod and a stop portion located between the two support portions. The stop portion and the two support portions are provided with two vertical swing channels for the first connecting rod to rotate to one side of the connector.

[0007] As a further technical solution, the first connecting rod is provided with abutment portions on both sides of one end facing the center of the handwheel seat. The abutment portions restrict the first connecting rod from disengaging from the lower swing channel after the first connecting rod rotates vertically.

[0008] As a further technical solution, the lower part of the first connecting rod is provided with a sliding protrusion, and the support part is provided with a sliding groove that matches the sliding protrusion.

[0009] As a further technical solution, a positioning hole is provided at the end of the sliding groove away from the stop, and the positioning hole is for the sliding protrusion to be inserted and positioned.

[0010] As a further technical solution, the first wheel body includes two first sleeves with driven members at their ends and connected to a first connecting rod, and a first ring body sleeved with the first sleeves.

[0011] As a further technical solution, a first positioning ring is provided between the two first ring bodies.

[0012] As a further technical solution, the second wheel body includes two second sleeves with active members at their ends and connected to second connecting rods, and a second ring body sleeved with the second sleeves.

[0013] As a further technical solution, the driven member and the driving member are inserted together and have through holes, and are fixed by pins.

[0014] As a further technical solution, the connector includes a connecting bracket fixedly connected to the pneumatic diaphragm actuator and a guide cylinder for limiting the position of the transmission rod. The upper end of the connecting bracket is provided with a transmission seat that cooperates with the transmission rod.

[0015] The beneficial effects of this invention are as follows: the handwheel seat has a first connecting groove and a second connecting groove on opposite sidewalls. A first connecting rod and a second connecting rod on the first wheel body and the second wheel body respectively extend into the first connecting groove and the second connecting groove. The first wheel body and the second wheel body are fixedly connected by the cooperation of a driving member and a driven member, forming a complete handwheel. This facilitates rotating the handwheel seat to drive the transmission rod to rotate upwards or downwards. After rotation, the driving member and the driven member disengage, and the two first connecting rods move towards each other, causing the first ring of the first wheel body to retract into the first sleeve. Simultaneously, the first connecting rod rotates downwards from the lower swing channel until it contacts the connecting bracket parallel to the ground. The second wheel body operates in the same way. Thus, the first connecting rod and the second connecting rod, located on opposite sides of the connecting bracket and in parallel contact with it, prevent the handwheel seat from shifting, serving as a limiting mechanism. Furthermore, the handwheel mechanism of this invention is easy to disassemble and conceal, and its installation is convenient when operating the regulating valve. After installation, the handwheel mechanism has good stability and facilitates continuous operation by personnel. Attached Figure Description

[0016] Figure 1 This is a schematic diagram illustrating the application of the concealed handwheel mechanism of the regulating valve of the present invention; Figure 2 This is a schematic diagram of the concealed handwheel mechanism of the regulating valve of the present invention; Figure 3 This is an exploded view of the concealed handwheel mechanism of the regulating valve of the present invention; Figure 4 This is a schematic diagram of the handwheel seat structure of the concealed handwheel mechanism for the regulating valve of the present invention; Figure 5 This is a schematic diagram of the handwheel seat connection of the concealed handwheel mechanism of the regulating valve of the present invention; Figure 6 This is a schematic diagram of the first connecting rod of the concealed handwheel mechanism of the regulating valve of the present invention; In the figure: 1-valve body; 2-pneumatic diaphragm actuator; 3-connector; 301-connecting bracket; 302-guide cylinder; 303-transmission seat; 4-transmission component; 401-transmission rod; 5-handwheel seat; 501-first connecting groove; 502-second connecting groove; 503-support part; 504-sliding groove; 505-lower swing channel; 506-positioning hole; 507-stop part; 508-connecting hole; 6-first wheel body; 601-first sleeve; 602-first ring body; 603-first positioning ring; 604-driven component; 605-first connecting rod; 606-abutment part; 607-sliding protrusion; 7-second wheel body; 701-second sleeve; 702-second ring body; 703-second positioning ring; 704-driving component; 705-second connecting rod; 8-pin. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. It should be noted that, unless otherwise specified, the embodiments and features described herein can be combined with each other.

[0018] In the description of this invention, it should be understood that the terms "upper" and "lower" are based on the orientation or positional relationship shown in the accompanying drawings and are used only for the convenience of describing the invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the invention. Furthermore, the terms "first," "second," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. In the description of this invention, unless otherwise stated, "a plurality of" means two or more.

[0019] like Figure 1 and Figure 2 As shown, this invention discloses a concealed handwheel mechanism for a regulating valve, applied to a valve body 1 and a pneumatic diaphragm actuator 2. It includes a connecting member 3 located at the upper end of the pneumatic diaphragm actuator 2 and a transmission member 4 located at the upper end of the connecting member 3. The transmission member 4 includes a transmission rod 401 connected to the push rod of the pneumatic diaphragm actuator 2 via the connecting member 3. The transmission rod 401 rotates upwards or downwards, driving the push rod and thus the valve stem to open or close the valve. The valve body 1 and the pneumatic diaphragm actuator 2 utilize existing technology; components such as the filter pressure reducing valve, electric valve positioner, and valve position indicator that cooperate with the pneumatic diaphragm actuator 2 are not shown or described.

[0020] The connecting component 3 includes a connecting bracket 301 fixedly connected to the pneumatic diaphragm actuator 2. A guide cylinder 302 is connected to the inner side of the connecting bracket 301 to limit and guide the transmission rod 401, preventing the transmission rod 401 from shifting. A transmission seat 303, which mates with the transmission rod 401, is provided at the upper end of the connecting bracket 301. The structure of the transmission rod 401 and the transmission seat 303 can adopt the existing lead screw and nut connection method, or other structures that allow the transmission rod 401 to move axially relative to the transmission seat 303 when it rotates.

[0021] like Figure 2 , Figure 3 and Figure 4 As shown, in a preferred embodiment, the transmission component 4 further includes a handwheel seat 5 for driving the transmission rod 401. The side wall of the handwheel seat 5 is provided with one or more pairs of opposing first connecting grooves 501 and second connecting grooves 502 with identical structures. In this embodiment, the side wall of the handwheel seat 5 is provided with one pair of first connecting grooves 501 and second connecting grooves 502 with identical structures. The handwheel that matches the handwheel seat 5 is composed of a detachable first wheel body 6 and a second wheel body 7, which are movably connected to the first connecting groove 501 and the second connecting groove 502, respectively.

[0022] In a preferred embodiment, both the first wheel body 6 and the second wheel body 7 are telescopic structures. The first wheel body 6 has driven members 604 at both ends, and the second wheel body 7 has driving members 704 at both ends that match the driven members 604. The driven members 604 have grooves, and the driving members 704 are protrusions that can be inserted into the grooves. The driven members 604 and the driving members 704 are interlocked and both have through holes, and are fixed by pins 8. When the first wheel body 6 and the second wheel body 7 are interlocked by the driven members 604 and the driving members 704 and fixed by the pins 8, a complete handwheel is formed. The handwheel is inserted into the handwheel seat 5, and rotating the handwheel causes the handwheel seat 5 to rotate, driving the transmission rod 401 to spiral up or down. The driven members 604 and the driving members 704 are not limited to the structure shown in the figure; other detachable connection methods such as snap-fit ​​or screw-fit can also be used.

[0023] In a preferred embodiment, the first wheel body 6 and the second wheel body 7 are respectively provided with a first connecting rod 605 and a second connecting rod 705 extending into the first connecting groove 501 and the second connecting groove 502. The first connecting rod 605 and the second connecting rod 705 move horizontally in opposite directions within the first connecting groove 501 and the second connecting groove 502 to fix the first wheel body 6 and the second wheel body 7 into a handwheel, or move horizontally towards each other to separate the first wheel body 6 and the second wheel body 7 and hide them to one side of the connecting member 3. It should be noted that, in this embodiment, taking the first connecting rod 605 as an example, moving in opposite directions means that the two first connecting rods 605 move in opposite directions and move away from each other, while moving towards each other means that the two first connecting rods 605 move in opposite directions and move closer to each other.

[0024] In a preferred embodiment, the first connecting groove 501 and the second connecting groove 502 have the same structure; only the first connecting groove 501 will be described in detail here. The first connecting groove 501 is located on the outer wall of the handwheel seat 5 and has a rectangular cross-section. The first connecting groove 501 includes support portions 503 located on the left and right sides for supporting the first connecting rod 605 and a stop portion 507 located between the two support portions 503. The stop portion 507 can be bolted to the handwheel seat 5. The support portions 503 and the upper wall of the first connecting groove 501 can accommodate the first connecting rod 605. Two downward swing channels 505 are provided between the stop portion 507 and the two support portions 503. The horizontal width of the downward swing channels 505 is the same as the width of the first connecting rod 605. The downward swing channels 503 are as follows: Figure 4 As shown, the first connecting rod 605 rotates horizontally towards the stop part 507. When it rotates to the lower swing channel 505, the first connecting rod 605 can rotate downwards axially towards the end near the abutment part 606 to the side of the connecting member 3, that is, the first connecting rod 605 abuts parallel to the connecting bracket 301. When both the first connecting rod 605 and the second connecting rod 705 abut parallel to the connecting bracket 301, the handwheel mechanism can be hidden to one side of the connecting bracket 301 to prevent accidental operation and to prevent the handwheel seat 5 from shifting, thus playing a limiting role. Of course, it is also possible to remove it directly from the lower swing channel 505 when the first connecting rod 605 and the second connecting rod 705 abut parallel to the connecting bracket 301.

[0025] like Figure 6 As shown, in a preferred embodiment, the first connecting rod 605 and the second connecting rod 705 have the same structure; only the first connecting rod 605 will be described in detail here. The first connecting rod 605 has abutment portions 606 on both sides of its end facing the center of the handwheel seat 5. Both the abutment portions 606 and the end of the first connecting rod 605 connected to the abutment portions 606 are rounded to prevent friction with the upper and lower walls of the first connecting groove 501 during rotation. In this case, the two ends of the first connecting groove 501 away from the stop portion 507 may have grooves matching the shape of the abutment portions 606, allowing the abutment portion 606 of the first connecting rod 605 near the support portion 503 to be inserted into the grooves. Alternatively, these grooves may not be provided. Of course, the abutment portion 606 may also only be provided on the side of the first connecting rod 605 near the lower swing channel 505. The abutment portion 606 is slightly lower than the height of the first connecting rod 605 and extends to the outer side of the first connecting rod 605 in the horizontal direction. Since the horizontal width of the lower swing channel 505 is the same as the width of the first connecting rod 605, when the first connecting rod 605 rotates 90 degrees, the abutment portion 606 rests on the upper part of the stop portion 507. Thus, after the first connecting rod 605 rotates vertically, the abutment portion 606 restricts the first connecting rod 605 from disengaging from the lower swing channel 505. This not only hides the handwheel but also allows for timely and convenient installation when the handwheel is needed.

[0026] like Figure 4 and Figure 5 As shown, the lower part of the first connecting rod 605 is provided with a sliding protrusion 607, and the support part 503 is provided with a sliding groove 504 that matches the sliding protrusion 607. Thus, the first connecting rod 605 can move within the first connecting groove 501 in a restricted manner, improving the connection stability between the first connecting rod 605 and the first connecting groove 501. Preferably, the end of the sliding groove 504 away from the stop part 507 is provided with a positioning hole 506, which extends into the seat body of the handwheel seat 5. The sliding protrusion 607 extends to the outer side of the first connecting rod 605 in the horizontal direction, and its shape and structure match the positioning hole 506. The positioning hole 506 allows the sliding protrusion 607 to be inserted and positioned, making the connection between the first connecting rod 605 and the support part 503 more secure. Therefore, the complete handwheel composed of the first wheel body 6 and the second wheel body 7 can stably operate on the handwheel seat 5, improving the stability of operation.

[0027] like Figure 2 and Figure 3 As shown, in a preferred embodiment, both the first wheel body 6 and the second wheel body 7 are made of stainless steel. The first wheel body 6 includes two first sleeves 601 with driven members 604 at their ends and connected to a first connecting rod 605, and a first ring body 602 that fits into the first sleeves 601. The first ring body 602 fits into the first sleeves 601 and will not be completely pushed away from the first sleeves. A first positioning ring 603 is provided between the two first ring bodies 602. When the two first connecting rods 605 move towards each other, the first ring body 602 retracts into the first sleeves 601. The second wheel body 7 includes two second sleeves 701 with driven members 704 at their ends and connected to a second connecting rod 705, and a second ring body 702 that fits into the second sleeves 701. A second positioning ring 703 is provided between the two second ring bodies 702.

[0028] After use, the handwheel mechanism of the present invention first removes the pin 8 to separate the driven member 604 and the driving member 704. Then, the first connecting rod 605 and the second connecting rod 705 are respectively moved. The two first connecting rods 605 move towards each other, and the two second connecting rods 705 move towards each other, so that the first sleeve 601 and the second sleeve 701 slide into the outer wall of the first ring body 602 and the second ring body 702 respectively, until the first connecting rod 605 and the second connecting rod 705 rotate downward from the lower swing channel 505 to a vertical state and abut against the connecting bracket 301. At this time, the abutting part 606 rests on the upper part of the lower swing channel 505, and the first connecting rod 605 disengages from the support part 503. It is in a vertical state and is suspended in the upper part of the lower swing channel 505, thus achieving the purpose of hiding the handwheel and limiting the handwheel seat 5, preventing the handwheel mechanism from being exposed to the outside and being operated arbitrarily or accidentally, affecting the normal use of the regulating valve. When it is necessary to reassemble the handwheel to operate the handwheel seat 5, rotate and lift the first connecting rod 605 and the second connecting rod 705 to a horizontal position. Slide the first sleeve 601 and the second sleeve 701 outward from the outer wall of the first ring 602 and the second ring 702 respectively, so that the first connecting rod 605 and the second connecting rod 705 move horizontally to the support part 503 respectively. Then the driven member 604 and the driving member 704 are connected by the pin 8, so that the handwheel seat 5 can be reoperated and can be installed in a timely and convenient manner.

[0029] The preferred embodiments and examples 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 and examples. Within the scope of knowledge possessed by those skilled in the art, various changes or equivalent substitutions can be made without departing from the concept of the present invention. Therefore, the present invention is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are within the scope of protection of the present invention.

Claims

1. A concealed handwheel mechanism for a regulating valve, comprising a connector (3) located at the upper end of a pneumatic diaphragm actuator (2) and a transmission component (4) located at the upper end of the connector (3), characterized in that: The transmission component (4) includes a transmission rod (401) connected to the push rod of the pneumatic diaphragm actuator (2) via the connector (3) and a handwheel seat (5) that drives the transmission rod (401). The side wall of the handwheel seat (5) is provided with at least a pair of opposing first connecting grooves (501) and second connecting grooves (502) of the same structure. The first connecting groove (501) and the second connecting groove (502) are respectively connected to a first wheel body (6) with driven members (604) at both ends and a second wheel body (7) with driving members (704) at both ends. The driven members (604) and the driving members (704) are inserted into each other and are provided with through holes and fixed by pins (8). The first wheel body (6) and the second wheel body (7) are respectively provided with at least two first connecting rods (605) and second connecting rods (705) extending into the first connecting groove (501) and the second connecting groove (502). The first connecting rods (605) and the second connecting rods (705) are in The first connecting groove (501) and the second connecting groove (502) move horizontally in opposite directions to fix the first wheel (6) and the second wheel (7) into a handwheel, or move horizontally in opposite directions to separate the first wheel (6) and the second wheel (7) and hide them to one side of the connector (3). The first connecting groove (501) includes support portions (503) on both sides for supporting the first connecting rod (605) and a stop portion located between the two support portions (503). (507) Two vertical swing channels (505) are provided between the stop (507) and the two support (503) for the first connecting rod (605) to rotate to one side of the connector (3). The first connecting rod (605) has abutment portions (606) on both sides of one end facing the center of the handwheel seat (5). The abutment portions (606) restrict the first connecting rod (605) from disengaging from the swing channels (505) after the first connecting rod (605) rotates vertically.

2. The concealed handwheel mechanism for regulating valves according to claim 1, characterized in that: The first connecting rod (605) has a sliding protrusion (607) at its lower part, and the support part (503) has a sliding groove (504) that matches the sliding protrusion (607).

3. The concealed handwheel mechanism for regulating valves according to claim 2, characterized in that: The sliding groove (504) has a positioning hole (506) at one end away from the stop (507), and the positioning hole (506) is for the sliding protrusion (607) to be inserted and positioned.

4. The concealed handwheel mechanism for regulating valves according to claim 1, characterized in that: The first wheel body (6) includes two first sleeves (601) with the driven member (604) at the end and connected to the first connecting rod (605) and a first ring body (602) sleeved with the first sleeve (601).

5. The concealed handwheel mechanism for regulating valves according to claim 4, characterized in that: A first positioning ring (603) is provided between the two first ring bodies (602).

6. The concealed handwheel mechanism for regulating valves according to claim 1, characterized in that: The second wheel body (7) includes two second sleeves (701) with the active member (704) at the end and connected to the second connecting rod (705), and a second ring body (702) sleeved with the second sleeve (701).

7. The concealed handwheel mechanism for regulating valves according to claim 1, characterized in that: The connector (3) includes a connecting bracket (301) fixedly connected to the pneumatic diaphragm actuator (2) and a guide cylinder (302) for limiting the transmission rod (401). The upper end of the connecting bracket (301) is provided with a transmission seat (303) that cooperates with the transmission rod (401).

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