A hand wheel rod push plate assembly specially used for pneumatic regulating valve

Abstract

The present invention relates to the field of nuclear power equipment, and in particular to a handwheel rod push plate assembly for a pneumatic control valve. The assembly includes: a push plate, a stop plate, a handwheel rod, a plane thrust bearing and a pin shaft; the push plate is in the shape of a disc; a first through hole is arranged outside the center line of the push plate; the stop plate has a "J"-shaped cross section, and one side of the outer diameter of the stop plate is welded to the push plate; the side of the stop plate has a notch; a second through hole is arranged at the center of the notch; the handwheel rod is arranged vertically with the push plate, and its lower part is embedded in the notch of the stop plate; the handwheel rod transmits the force of the handwheel to the push plate through the thrust bearing; the plane thrust bearing is arranged in the stop plate and is located between the handwheel rod and the push plate; the pin shaft is inserted into the first through hole and the second through hole. The present invention can effectively prevent the handwheel rod from loosening from the push plate, damaging the diaphragm and failing the valve function while realizing the manual operation of the pneumatic control valve.

Description

Technical Field

[0001] The invention relates to the field of nuclear power equipment, in particular to a hand wheel rod push plate assembly dedicated to a pneumatic regulating valve. Background Art

[0002] Pneumatic control valves are important equipment for nuclear power plants to achieve medium regulation. Diaphragm actuators are the most commonly used pneumatic control valve actuators. After compressed air enters the diaphragm chamber, it pushes the actuator push rod to move, thereby driving the valve stem and valve core to move, changing the medium flow cross-sectional area and adjusting the medium process parameters; the actuator relies on a compression spring to achieve reset.

[0003] Pneumatic control valves in nuclear power plants are generally equipped with handwheel devices to enable manual operation during commissioning, maintenance or emergency conditions. Traditional handwheel rod push plate assemblies have problems such as the push plate being easily damaged and the handwheel rod being easily detached from the push plate, causing damage to the rubber diaphragm and valve function failure. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide a handwheel rod push plate assembly specifically for a pneumatic control valve, which can push the diaphragm downward, thereby driving the actuator push rod and the valve stem downward to achieve medium regulation, while avoiding the high failure probability problem of traditional devices.

[0005] The present invention provides a hand wheel rod push plate assembly for a pneumatic regulating valve, comprising: a push plate, a stop plate, a hand wheel rod, a plane thrust bearing and a pin shaft;

[0006] The push plate is disc-shaped; a first through hole is arranged outside the center line of the push plate;

[0007] The stop plate has a "J"-shaped cross section, and one side of the outer diameter of the stop plate is welded to the push plate; a side surface of the stop plate has a notch; a second through hole is provided at the center of the notch;

[0008] The handwheel rod is vertically arranged with respect to the push plate, and its lower part is embedded in the cutout of the stop plate; the handwheel rod transmits the force of the handwheel to the push plate through the thrust bearing;

[0009] The plane thrust bearing is arranged in the stop plate and is located between the hand wheel rod and the push plate;

[0010] The pin shaft is inserted into the first through hole and the second through hole.

[0011] Preferably, a first through hole is provided 12 mm outside the center line of the push plate, and the diameter of the first through hole is 1.6 mm.

[0012] Preferably, the push plate has an outer diameter of 64 mm, a bottom chamfer of 5×1.5 mm, and a thickness of 5 mm.

[0013] Preferably, the width of the incision is 20 mm.

[0014] Preferably, a second through hole is arranged 12 mm outside the center line of the stop disk, and the diameter of the second through hole is 1.6 mm.

[0015] Preferably, the stop plate has a lower outer diameter of 64 mm, an upper outer diameter of 42 mm, a wall thickness of 3 mm, an upper center hole diameter of 14 mm, and a total height of 19 mm.

[0016] Preferably, the handwheel rod comprises a first optical axis, a second optical axis, and a tool-retracting groove disposed between the first optical axis and the second optical axis;

[0017] Both ends of the first optical axis are respectively provided with threads;

[0018] The other end of the second optical axis away from the back-cut groove is a transition section and a thrust head respectively. Preferably, the total length of the handwheel rod is 178.5 mm, the thread at one end of the first optical axis is 10 mm long, used to install the handwheel fixing nut, and the thread at the other end is 80 mm long, used to cooperate with the valve stem nut to realize the up and down movement of the handwheel rod; the optical axis between the two ends of the thread is 10 mm long;

[0019] The length of the undercut is 3 mm;

[0020] The second optical axis is 69 mm long; the size of the transition section is φ7×4 mm;

[0021] The dimensions of the thrust head are φ10×2.5 mm.

[0022] Preferably, the dimensions of the planar thrust bearing are φ6×φ10×3 mm.

[0023] Preferably, the size of the pin is φ1.5×22 mm.

[0024] Compared with the prior art, the handwheel rod push plate assembly specially used for the pneumatic regulating valve of the present invention can realize the manual operation of the pneumatic regulating valve and can avoid the friction between the lower end of the handwheel rod and the push plate and the stop plate, which may cause the handwheel rod and the push plate to loosen and directly hit the diaphragm to cause damage to the diaphragm and failure of the valve function. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A schematic structural diagram showing the hand wheel lever push plate assembly of the present invention. DETAILED DESCRIPTION

[0026] In order to further understand the present invention, the embodiments of the present invention are described below in conjunction with examples, but it should be understood that these descriptions are only for further illustrating the features and advantages of the present invention, rather than limiting the present invention.

[0027] The embodiment of the present invention discloses a hand wheel rod push plate assembly dedicated to a pneumatic regulating valve, such as Figure 1 As shown, it includes: a push plate 1, a stop plate 2, a hand wheel rod 3, a plane thrust bearing 4 and a pin 5;

[0028] The handwheel rod transmits the force of the handwheel to the push plate through the thrust bearing, thereby pushing the diaphragm of the valve downward. When the handwheel is rotated counterclockwise (right-hand thread), the handwheel rod moves upward, and the diaphragm moves upward under the action of the spring force, driving the valve stem upward.

[0029] The dimensions of the handwheel rod push plate assembly can be modified according to the design parameters of the pneumatic control valve.

[0030] The push plate 2 is disc-shaped; a first through hole is provided 12 mm outside the center line of the push plate 2, the diameter of the first through hole is 1.6 mm, and the first through hole is used to install the pin; the outer diameter of the push plate is 64 mm, and the bottom chamfer is 5×1.5 mm, that is, the bottom diameter is φ54 and the thickness is 5 mm;

[0031] The stop plate 2 has a "J"-shaped cross section, and one side of the outer diameter of the stop plate 2 is welded to the push plate 1; the side of the stop plate 2 has a notch, and the width of the notch is 20mm; a second through hole is set 12mm outside the center line of the notch, and the diameter of the second through hole is 1.6mm. The second through hole corresponds to the first through hole and is used to install the pin shaft;

[0032] The stop plate has a lower outer diameter of 64 mm, an upper outer diameter of 42 mm, a wall thickness of 3 mm, an upper center hole diameter of 14 mm, and a total height of 19 mm.

[0033] The handwheel rod 3 is vertically arranged with respect to the push plate 1, and its lower part is embedded in the cutout of the stop plate 2; the handwheel rod 3 transmits the force of the handwheel to the push plate 1 through the thrust bearing;

[0034] The hand wheel rod is shaft-shaped and is used to transmit the force of the hand wheel. It includes a first optical axis, a second optical axis, and a backing groove arranged between the first optical axis and the second optical axis;

[0035] Both ends of the first optical axis are respectively provided with threads;

[0036] The other end of the second optical axis away from the back-cut groove is respectively a transition section and a thrust head. The total length of the handwheel rod is 178.5mm, the thread at one end of the first optical axis is 10mm long, used to install the handwheel fixing nut, and the thread at the other end is 80mm long, used to cooperate with the valve stem nut to realize the up and down movement of the handwheel rod; the optical axis between the two ends of the thread is 10mm long;

[0037] The length of the undercut is 3 mm;

[0038] Below the back-cut groove is the second optical axis, with a size of φ12×69mm, which plays a guiding role in the handwheel rod bracket;

[0039] The size of the transition section is φ7×4mm;

[0040] The dimensions of the thrust head are φ10×2.5 mm.

[0041] The plane thrust bearing 4 is arranged in the stop plate 2 and between the handwheel rod 3 and the push plate 1; its function is to eliminate the rotation of the handwheel rod, avoid the wear of the push plate and transmit the torque of the handwheel rod. The size of the plane thrust bearing is φ6×φ10×3mm, which is compatible with the size of the thrust head of the handwheel rod.

[0042] The pin is inserted into the first through hole and the second through hole to prevent the hand wheel rod and the plane thrust bearing from coming out. The size is φ1.5×22mm.

[0043] The above embodiments are only used to help understand the method and core idea of ​​the present invention. It should be noted that, for those skilled in the art, several improvements and modifications can be made to the present invention without departing from the principles of the present invention, and these improvements and modifications also fall within the scope of protection of the claims of the present invention.

[0044] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention. Therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

Claims

1. A hand wheel rod push plate assembly for a pneumatic regulating valve, characterized in that: include: Push plate, stop plate, handwheel rod, plane thrust bearing and pin; The push plate is disc-shaped; a first through hole is arranged outside the center line of the push plate; The stop plate has a "J"-shaped cross section, and one side of the outer diameter of the stop plate is welded to the push plate; the side of the stop plate has a notch; a second through hole is provided at the center of the notch; The handwheel rod is vertically arranged with respect to the push plate, and its lower part is embedded in the cutout of the stop plate; the handwheel rod transmits the force of the handwheel to the push plate through the thrust bearing; The plane thrust bearing is arranged in the stop plate and is located between the hand wheel rod and the push plate; The pin shaft is inserted into the first through hole and the second through hole.

2. The hand wheel rod push plate assembly for pneumatic control valve according to claim 1 is characterized in that: A first through hole is arranged 12 mm outside the center line of the push plate, and the diameter of the first through hole is 1.6 mm.

3. The hand wheel rod push plate assembly for pneumatic control valve according to claim 2 is characterized in that: The push plate has an outer diameter of 64 mm, a bottom chamfer of 5×1.5 mm, and a thickness of 5 mm.

4. The hand wheel rod push plate assembly for pneumatic control valve according to claim 2, characterized in that: The width of the incision is 20 mm.

5. The hand wheel rod push plate assembly for pneumatic control valve according to claim 4, characterized in that: A second through hole is arranged 12 mm outside the center line of the stop disk, and the diameter of the second through hole is 1.6 mm.

6. The hand wheel rod push plate assembly for pneumatic control valve according to claim 4, characterized in that: The stop plate has a lower outer diameter of 64 mm, an upper outer diameter of 42 mm, a wall thickness of 3 mm, an upper center hole diameter of 14 mm, and a total height of 19 mm.

7. The hand wheel rod push plate assembly for pneumatic control valve according to claim 1, characterized in that: The hand wheel rod comprises a first optical axis, a second optical axis, and a tool-retracting groove arranged between the first optical axis and the second optical axis; Both ends of the first optical axis are respectively provided with threads; The other end of the second optical axis away from the tool retreat groove is respectively a transition section and a thrust head.

8. The hand wheel rod push plate assembly for pneumatic control valve according to claim 7, characterized in that: The total length of the handwheel rod is 178.5 mm, the thread at one end of the first optical axis is 10 mm long for installing the handwheel fixing nut, and the thread at the other end is 80 mm long for cooperating with the valve stem nut to realize the up and down movement of the handwheel rod; the optical axis between the two ends of the thread is 10 mm long; The length of the undercut is 3 mm; The second optical axis is 69 mm long; The size of the transition section is φ7×4mm; The dimensions of the thrust head are φ10×2.5 mm.

9. The hand wheel rod push plate assembly for pneumatic control valve according to claim 8, characterized in that: The dimensions of the plane thrust bearing are φ6×φ10×3mm.

10. The hand wheel rod push plate assembly for pneumatic control valve according to claim 8, characterized in that: The size of the pin shaft is φ1.5×22mm.

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