Manual operation device for automatic regulating valve

Abstract

The utility model provides a manual operation device for an automatic regulating valve, which comprises a stress tray, the stress tray comprises a cylindrical mounting seat, one end of the mounting seat is fixedly connected with a working disc, the end face, deviating from the mounting seat, of the working disc is an outer convex face, and the mounting seat is connected with a thrust rod bearing. According to the manual operation device of the automatic regulating valve, the transmission function of the ball bearing is utilized, when the regulating valve is opened, the friction force between the stress tray integrated with the ball bearing and the contact area of the diaphragm is extremely small, the stress tray and the diaphragm are almost in a relatively static state, and a worker only needs to overcome the friction introduced by the thread buckle and the pressure between the diaphragm and the spring; therefore, the resistance during operation is reduced, the difficulty of operating and adjusting the valve by a hand wheel under emergency conditions is reduced, and the service life of the valve actuating mechanism and the diaphragm is prolonged.

Description

Technical Field

[0001] The utility model belongs to the technical field of automatic regulating valves, and in particular relates to a manual operating device for an automatic regulating valve. Background Art

[0002] In industrial production, all adjustments and changes to process parameters require control and signal loops. Automatic control valves, the most common type of control loop, are the ultimate executors. A valve failure during routine production process adjustments can lead to frequent fluctuations in process parameters and difficulty in control, at best. In severe cases, it can lead to production halts and even deteriorate product quality. Therefore, reducing valve failure rates and extending valve life are crucial to ensuring overall industrial stability and product quality.

[0003] Typically, automatic control valves offer both remote control via the DCS and manual operation on-site. In the event of a DCS signal failure or interference, personnel can immediately manually operate the valve on-site. Therefore, the manual operation mechanism of an automatic control valve is the final safeguard for safe production in an enterprise. Generally, the thrust rod in a conventional manual operation mechanism directly contacts the diaphragm inside the actuator, creating a large contact surface. Any relative movement between the rod and the diaphragm can result in excessive friction and easily lead to scratches.

[0004] In this situation, when the operator manually opens the automatic regulating valve, they must not only overcome the friction introduced by the threaded fasteners connecting the manual device to the actuator, but also the relative friction between the thrust rod and the diaphragm, as well as the pressure between the diaphragm and the spring at the bottom of the diaphragm. In an emergency, the operator will find it difficult to control the force required to manually open the automatic regulating valve. Using too little force will make it difficult to open the valve; using too much force can cause the manual operating thrust rod to break, or even deviate and scratch the actuator diaphragm, thereby reducing the valve's service life and posing equipment risks to production. Utility Model Content

[0005] The utility model aims to provide a manual operating device for an automatic regulating valve, so as to reduce the valve resistance and the difficulty of manual operation of the valve during operation by personnel, and to increase the service life of the valve.

[0006] In order to achieve the above purpose, the technical solution adopted by the utility model is:

[0007] A manual operating device for an automatic regulating valve includes a force-bearing tray, which includes a cylindrical mounting seat. One end of the mounting seat is fixedly connected to a working disk, and the end surface of the working disk facing away from the mounting seat is an outer convex surface. The mounting seat is connected to a thrust rod bearing.

[0008] The manual operating device of the utility model has the following advantages:

[0009] 1. By utilizing the rolling transmission function of the ball bearing, when opening the regulating valve, the friction in the contact area between the force-bearing tray integrated with the ball bearing and the diaphragm is extremely small, and the valve is almost in a relatively static state. The operator only needs to overcome the friction introduced by the threaded buckle and the pressure between the diaphragm and the spring, thereby reducing the resistance during operation, making it easier for the operator to use the handwheel to operate the regulating valve in an emergency, and prolonging the service life of the valve actuator and diaphragm.

[0010] 2. The manual operating device of the utility model is easy to install and can be applied to automatic regulating valve actuators of different models, different materials and different manufacturers. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the application of the manual operating device of the utility model;

[0012] Figure 2 This is an exploded schematic diagram of the manual operating device of the present invention.

[0013] In the figure: 1-force tray; 11-mounting seat; 12-locking buckle; 2-ball bearing; 3-thrust rod; 31-thread; 32-stopper; 33-mounting section; 34-transition section; 35-connecting section; 351-external thread; 36-tail section; 37-screw; 4-actuator; 41-diaphragm; 42-spring; 43-threaded hole; 5-automatic regulating valve push rod; 6-handwheel. DETAILED DESCRIPTION

[0014] The present invention will be described in further detail below with reference to the accompanying drawings and specific implementation methods.

[0015] See Figure 1 and Figure 2 The manual operating device of the present invention includes a force-bearing tray 1 and a thrust rod 3. The force-bearing tray 1 is connected to one end of the thrust rod 3 through a ball bearing 2; the force-bearing tray 1 is placed in the actuator 4, and a diaphragm 41 is provided in the actuator 4. At least two springs 42 are provided at the bottom of the actuator 4 to support the diaphragm 41. One side of the diaphragm 41 is adjacent to the force-bearing tray 1, and the other side is connected to the automatic regulating valve push rod 5; the thrust rod 3 is processed with a thread, and the other end of the thrust rod 3 passes through the pressure cover of the actuator 4 and extends out of the actuator 4. A threaded hole 43 is processed on the pressure cover, and the thread on the thrust rod 3 is threadedly connected to the threaded hole 43. The thrust rod 3 can move back and forth along its own axis, and a handwheel 6 is installed on the end of the thrust rod 3 extending out of the actuator 4.

[0016] The force-bearing tray 1 includes a cylindrical mounting seat 11, one end of which is fixedly connected to a working disk, and the end face of the working disk facing away from the mounting seat 11 is an outer convex surface, which is the working surface, i.e. the force-bearing surface; a locking buckle 12 is radially processed in the inner hole of the mounting seat 11, and the mounting seat 11 is connected to the thrust rod 3 through a ball bearing 2.

[0017] The other end of the mounting seat 11 is symmetrically processed with two mounting channels, the axes of the mounting channels are parallel to the axis of the mounting seat 11 , and the ends of the two mounting channels facing the working disk are both connected to the locking buckle 12 .

[0018] The thrust rod 3 comprises a screw thread 37, a threaded portion 31, a stopper 32, a mounting section 33, a transition section 34, a connecting section 35, and a tail section 36. The ball bearing 2 is mounted on the screw thread 37 and is threadedly connected to the threaded portion 31. The mounting section 33 is provided with a staple 331, and the connecting section 35 is provided with an external thread 351.

[0019] The load-bearing tray 1, the ball bearing 2 and the thrust rod 3 are coaxially connected.

[0020] The load-bearing tray 1, the ball bearing 2, and the thrust rod 3 are all made of stainless steel. The joints between the load-bearing tray 1, the ball bearing 2, and the thrust rod 3 are reinforced with metal adhesive.

[0021] The installation and use methods of the manual operating device of the utility model are as follows:

[0022] 1. Insert the screw 37 into the inner hole of the ball bearing 2, then connect the screw 37 with the thread 31 and tighten it to ensure that the ball bearing 2 and the thrust rod 3 are fixedly connected.

[0023] 2. Heat the mounting seat 11, insert the assembly of the ball bearing 2 and the thrust rod 3 vertically into the mounting seat 11, and the two ends of the staple 73 enter the two mounting channels respectively. When the two ends of the staple 73 pass through the mounting channels and reach the locking buckle 12, rotate the thrust rod 3 so that the two ends of the staple 73 enter the locking buckle 12 and lock it. At this time, the ball bearing 2 is installed in the mounting seat 11, and the assembly is connected to the force-bearing tray 1.

[0024] The way in which the pin 73 enters the locking buckle 12 and is locked with the locking buckle 12 is the same as the installation method of a bayonet light bulb and a bayonet lamp holder.

[0025] During the design, the tolerance between the outer diameter of the screw 37 and the inner ring diameter of the ball bearing 2 is 2~3μm, and the tolerance between the inner diameter of the mounting seat 11 and the outer ring diameter of the ball bearing 2 is 2~3μm; during installation and connection, the force tray 1, ball bearing 2, and thrust rod 3 are kept coaxial; when in use, the thrust rod 3 is tightly connected to the force tray 1.

[0026] 3. Open the actuator 4, pass the end of the thrust rod 3 in the manual operating device of the present invention away from the force-bearing tray 1 through the threaded hole 43 on the gland of the actuator 4 from the inside to the outside, and connect it to the gland thread through the thread on the connecting section 35. The force-bearing surface of the force-bearing tray 1 faces the diaphragm 41 in the actuator 4, and install the handwheel 6 on the end of the thrust rod 3 extending out of the actuator 4. Close the actuator 4 to realize the connection between the manual operating device of the utility model and the actuator 4 of the automatic regulating valve.

[0027] Turn the handwheel 6. Due to the threaded transmission between the thrust rod 3 and the actuator 4, the thrust rod 3 drives the force-bearing tray 1 to move toward the diaphragm 41, thereby pushing the diaphragm 41 to move. The diaphragm 41 pushes the automatic regulating valve push rod 5 to move, opening the automatic regulating valve.

[0028] Rotate the handwheel 6 in the opposite direction, and the thrust rod 3 drives the force tray 1 to move away from the diaphragm 41. Under the action of the spring 42, the diaphragm 41 retreats in the same direction as the force tray 1, and the automatic regulating valve push rod 5 also retreats in the same direction, and the automatic regulating valve is closed.

[0029] During the rotation and reciprocating movement of the thrust rod 3, due to the rolling transmission effect of the ball bearing 2, the friction in the contact area between the force-bearing tray 1 and the diaphragm 41 integrated with the ball bearing 2 is extremely small, and is almost in a relatively static state. Therefore, when the operator uses the manual device to open the automatic regulating valve, he only needs to overcome the friction introduced by the threaded pair between the thrust rod 3 and the pressure cover and the pressure between the diaphragm 41 and the spring 42.

[0030] On the one hand, the manual operating device of the utility model reduces the risk of scratching the diaphragm 41 due to the relative movement between the diaphragm 41 and the force-bearing tray 1, thereby increasing the service life of the automatic regulating valve; on the other hand, due to the low friction of the rolling transmission, the operating resistance and difficulty of the operator when opening the automatic regulating valve are further reduced.

Claims

1. A manual operating device for an automatic regulating valve, characterized in that: The force-bearing tray (1) includes a cylindrical mounting seat (11), one end of the mounting seat (11) is fixedly connected to a working disk, the end surface of the working disk facing away from the mounting seat (11) is an outer convex surface, and the mounting seat (11) is connected to the thrust rod (3) bearing.

2. The manual operating device for an automatic regulating valve according to claim 1, characterized in that: The thrust rod (3) comprises a screw (37) and a thread (31), a stopper (32), a mounting section (33), a transition section (34), a connecting section (35) and a tail section (36) which are fixed in sequence; a clamping pin is provided on the mounting section (33), an external thread (351) is processed on the connecting section (35), a ball bearing (2) is sleeved on the screw (37), and the screw (37) is threadedly connected to the thread (31); the ball bearing (2) is installed in the mounting seat (11); when in use, the connecting section (35) is threadedly connected to the gland of the actuator (4).

3. The manual operating device for an automatic regulating valve according to claim 2, characterized in that: A locking buckle (12) is machined in the inner hole of the mounting seat (11), and the locking buckle (12) is locked with the pin.

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