Marine PV valve line grinding device

Abstract

The utility model discloses a marine PV valve line grinding device, which is characterized in that a connecting piece for fixing a PV valve is arranged at the upper end of a seat body, a driving mechanism is arranged on the seat body, a transmission mechanism comprises a rotating shaft, a cam and a lifting rod, the rotating shaft is rotatably arranged on the seat body and is connected with the driving mechanism, the cam is fixed on the rotating shaft, and the lifting rod is connected with the cam. The upper end of the lifting rod is connected with the end, away from the valve clack, of the valve rod, the lower end of the lifting rod abuts against the end-to-end side wall of the cam, and when the driving mechanism drives the rotating shaft and the cam to rotate, the lifting rod abuts against the cam to drive the valve rod and the valve clack to move up and down, and the valve clack vertically impacts a valve line at the valve port. The valve clack can be driven to ascend and descend through the rotation effect of the cam, the grinding effect is achieved through the impact action of the valve clack and a valve line of a PV valve when the valve clack falls, an operator can be prevented from operating the valve clack for a long time, more labor and manpower are saved for the operator, and the grinding precision is higher.

Description

Technical Field

[0001] This utility model relates to the technical field of ship component repair devices, and in particular to a marine PV valve wire grinding device. Background Technology

[0002] PV valves, or marine high-speed vent valves, are specialized equipment on oil tankers. They are installed on the top of the tank and are used to release pressure and vacuum caused by temperature changes during the transport and storage of liquid cargo, as well as pressure and vacuum generated in the tank during loading, unloading and ballasting. They can also effectively prevent flames from entering the tank.

[0003] As attached Figure 5 and attached Figure 6 As shown, the PV valve opens and closes by raising and lowering the valve disc 102 to complete the above actions. When the PV valve is closed, the middle position of the valve disc 102 abuts against the valve line 1011 at the valve port 1010 to achieve a seal. Because the PV valve is exposed to the humid environment of the sea for extended periods, rust may form at the valve port 1010, resulting in poor sealing when in contact with the valve disc 102. Therefore, when disassembling the PV valve for maintenance, the valve line 1011 needs to be ground to ensure a tight seal with the valve disc 102. In existing grinding processes, operators typically lift the valve disc 102 repeatedly and drop it from a certain height to impact the valve line 1011 to remove rust. However, the valve disc 102 has a certain weight, and the grinding time is relatively long, resulting in high labor intensity for the operators. Utility Model Content

[0004] The purpose of this utility model is to provide a marine PV valve wire grinding device. The valve disc can be driven to rise and fall by the rotation of the cam, and the grinding effect is achieved by the impact action of the valve disc with the valve wire of the PV valve when it falls. This can avoid the operator operating the valve disc for a long time, making it more labor-saving and saving manpower, and the grinding accuracy is higher.

[0005] To achieve the above objectives, the technical solution adopted by this utility model is: a marine PV valve wire grinding device, comprising:

[0006] The base has a connector at its upper end for fixing the PV valve.

[0007] The drive mechanism is mounted on the base.

[0008] The transmission mechanism includes a rotating shaft, a cam, and a lifting rod. The rotating shaft is rotatably mounted on the base and connected to the drive mechanism. The cam is fixed to the rotating shaft. The upper end of the lifting rod is connected to the end of the valve stem away from the valve disc, and its lower end abuts against the side wall of the cam.

[0009] When the drive mechanism drives the rotating shaft and cam to rotate, the lifting rod abuts against the cam, causing the valve stem and valve disc to move up and down, and causing the valve disc to strike the valve line at the valve port vertically.

[0010] As a further optimization, the side wall of the cam connected end to end is provided with an impact notch. When the lifting rod moves relative to the impact notch, it can fall freely relative to the valve rod and valve disc, which can make the valve disc impact the valve line with a large force.

[0011] As a further optimization, the drive mechanism includes a motor, a first belt assembly, a drive shaft, and a second belt assembly. The drive shaft is rotatably mounted on the base, and the first belt assembly and the second belt assembly are sleeved on it. The first belt assembly is connected to the motor, and the second belt assembly is connected to the rotating shaft.

[0012] As a further optimization, the base is provided with multiple bearings, and both the drive shaft and the rotating shaft are rotatably mounted in the bearings, which can ensure the rotational stability of the drive shaft and the rotating shaft.

[0013] As a further optimization, the base is provided with a guide sleeve, and the lifting rod is vertically movable within the guide sleeve to ensure the stability of the vertical movement of the lifting rod.

[0014] As a further optimization, a limiting groove is provided on the side wall of the cam where the ends are connected, and the lower end of the lifting rod abuts in the limiting groove.

[0015] As a further optimization, the lifting rod includes an upper rod and a lower rod. The lower part of the upper rod is provided with a threaded section, and the upper end of the lower rod is provided with a threaded hole. The threaded section is screwed into the threaded hole to connect the upper rod and the lower rod. The other end of the upper rod is connected to the valve stem, and the other end of the lower rod abuts against the cam. This allows the length of the lifting rod to be adjusted to suit different PV valves.

[0016] As a further optimization, the lower rod is provided with a positioning hole that extends into the threaded hole, the positioning hole is provided with an internal thread, and a set screw is provided in the positioning hole to abut against the threaded section.

[0017] As a further optimization, the upper end of the upper rod is provided with an insertion hole for positioning the lower end of the valve stem, which facilitates the connection between the valve stem and the lifting rod.

[0018] As a further optimization, the seat body includes at least an outer shell, on which a first vent and a second vent are provided in communication with its cavity, the connecting member is a flange seat which is disposed on the second vent, and the cavity is connected to a PV valve.

[0019] As a further optimization, the seat also includes an inner shell, the drive mechanism, the rotating shaft, and the cam are located inside the cavity of the inner shell, and the lifting rod extends out of the inner shell.

[0020] Compared with the prior art, the present invention has the following beneficial effects:

[0021] 1. The rotation of the cam can drive the valve disc to rise and fall, and the impact action of the valve disc with the valve line of the PV valve when it falls can achieve the grinding effect. This can avoid the operator operating the valve disc for a long time, making it more labor-saving and saving manpower, and the grinding precision is higher.

[0022] 2. In one particular implementation, the length of the lifting rod is adjustable, making it suitable for different PV valves. Attached Figure Description

[0023] Figure 1 This is a structural diagram (section view of one side of the base) of one embodiment of the present utility model.

[0024] Figure 2 This is a structural diagram (sectional view of one side of the base) of another embodiment of the present invention.

[0025] Figure 3 This is a schematic diagram showing the connection of the rotating shaft, cam, and lifting rod of this utility model.

[0026] Figure 4 This is a schematic diagram showing the connection between the lifting rod and the valve rod of this utility model.

[0027] Figure 5 This is a schematic diagram of the PV valve in the closed state.

[0028] Figure 6 This is a schematic diagram of the PV valve in the open state. Detailed Implementation

[0029] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0030] like Figures 1 to 6As shown, a marine PV valve wire grinding device includes a base 20, a drive mechanism 30, and a transmission mechanism 40. The upper end of the base 20 is provided with a connector 50 for fixing the PV valve 101. The drive mechanism 30 is disposed on the base 20. The transmission mechanism 40 includes a rotating shaft 41, a cam 42, and a lifting rod 43. The rotating shaft 41 is rotatably disposed on the base 20 and connected to the drive mechanism 30. The cam 42 is fixed on the rotating shaft 41 and can rotate synchronously with the rotating shaft 41. The upper end of the lifting rod 43 is connected to the end of the valve stem 1021 away from the valve disc 102, and its lower end abuts against the side wall of the cam 42 connected end to end. When the drive mechanism 30 drives the rotating shaft 41 and the cam 42 to rotate, the lifting rod 43 abuts against the cam 42, causing the valve stem 1021 and the valve disc 102 to move up and down, and causing the valve disc 102 to vertically impact the valve wire 1011 at the valve port 1010.

[0031] In this invention, the PV valve 101 is fixed to the seat 20 via a connector 50, and the valve stem 1021, which is connected to the valve disc 102, is connected to the lifting rod 43. When the drive mechanism 30 operates, it drives the rotating shaft 41 to rotate. Simultaneously, the rotating shaft 41 drives the cam 42 to rotate. Because the distances between the end-to-end sidewalls of the cam 42 and the rotation axis are different, the lifting rod 43, which abuts against the cam 42, moves up and down during the rotation of the cam 42. This causes the valve stem 1021 and the valve disc 102 to move up and down. The end of the valve disc 102, driven to move down, impacts the valve line 1011 at the valve port 1010, thus achieving a grinding action at that location. Furthermore, since the valve disc 102 is rotatably mounted on the valve stem 1021, when the valve disc 102 impacts the valve line 1011, the operator can rotate the valve disc 102 relative to the valve line 1011 to enhance the grinding effect. Furthermore, the side wall of the cam 42, which is connected end to end, is provided with an impact notch 421. The existence of the impact notch 421 allows the lifting rod 43 to move to a fixed position and then be briefly not in contact with the lifting rod 43 after the cam 42 rotates. This allows the lifting rod 43, valve stem 1021 and valve disc 102 to fall relatively freely, so that the valve disc 102 can impact the valve line 1011 more forcefully.

[0032] This utility model utilizes the cooperation of the drive mechanism 30 and the transmission mechanism 40, that is, the rotation of the cam 42 drives the valve disc 102 to rise and fall, and the grinding effect is achieved by the impact action of the valve disc 102 on the valve line 1011 of the PV valve 101 when it falls. This can avoid the operator operating the valve disc 102 for a long time (the action of lifting the valve disc 102), and the operator only needs to rotate the valve disc 102 intermittently, saving manpower and achieving higher grinding precision.

[0033] Preferably, the drive mechanism 30 includes a motor 31, a first belt assembly 32, a drive shaft 33, and a second belt assembly 34. The drive shaft 33 is rotatably mounted on the base 20, and the first belt assembly 32 and the second belt assembly 34 are sleeved on it. The first belt assembly 32 is connected to the motor 31, and the second belt assembly 34 is connected to the rotating shaft 41. For example, a pulley can be fixed at the output end of the motor 31, and a pulley can be fixed on the drive shaft 33. A transmission belt can be sleeved on the pair of pulleys to form the first belt assembly 32. Similarly, another pulley can be fixed on the drive shaft 33, and a pulley can be fixed on the rotating shaft 41. A transmission belt can be sleeved on the pair of pulleys to form the second belt assembly 34. The above-mentioned transmission components can realize the transmission action, and the arrangement of the drive shaft 33 and the rotating shaft 41 at different height positions allows the transmission action to extend upward in space.

[0034] Furthermore, the base 20 is provided with multiple bearings 330, and the drive shaft 33 and the rotating shaft 41 are rotatably mounted in the bearings 330 to ensure the positional stability and rotational stability of the drive shaft 33 and the rotating shaft 41.

[0035] In addition, a guide sleeve 430 is provided on the base 20, and the lifting rod 43 is vertically movable inside the guide sleeve 430, which can ensure the vertical movement of the lifting rod 43 and the stability of the vertical movement.

[0036] The cam 42 has a limiting groove 420 on its end-to-end side wall. The lower end of the lifting rod 43 abuts in the limiting groove 420 to ensure the stability of the two at the abutting position. In addition, the lower end of the lifting rod 43 can have an arc surface structure, which makes it easier to achieve relative movement with the cam 42 during the abutting process.

[0037] like Figure 4 As shown, the lifting rod 43 includes an upper rod 431 and a lower rod 432. The lower part of the upper rod 431 has a threaded section 4311, and the upper end of the lower rod 432 has a threaded hole 4320. The threaded section 4311 is screwed into the threaded hole 4320 to connect the upper rod 431 and the lower rod 432. The other end of the upper rod 431 is connected to the valve stem 1021, and the other end of the lower rod 432 abuts against the cam 42. In this embodiment, the lifting rod 43 is a detachable structure. The connection between the upper rod 431 and the lower rod 432 can be achieved by screwing the threaded section 4311 into the threaded hole 4320. At the same time, the length of the lifting rod 43 can be changed by different screwing positions, making it suitable for different PV valves (matching valve stems of different lengths).

[0038] Furthermore, the lower rod 432 is provided with a positioning hole 432a that extends into the threaded hole 4320. The positioning hole 432a is provided with an internal thread, and a set screw 432b is provided in the positioning hole 432a to abut against the threaded section 4311 of the upper rod 431. The abutment of the set screw 432b can make the threaded section 4311 located in the threaded hole 4320 more stable, thereby ensuring the connection stability between the upper rod 431 and the lower rod 432.

[0039] Preferably, the upper end of the upper rod 431 is provided with an insertion hole 4310 for positioning the lower end of the valve stem 1021. During assembly, the valve stem 1021 can be directly inserted into the insertion hole 4310, or a rubber ring or similar device can be fitted on the outer side of the lower part of the valve stem 1021 to achieve an interference fit with the inner wall of the insertion hole 4310, thereby ensuring that the valve stem 1021 is stably connected to the insertion hole 4310.

[0040] In another embodiment of the present invention, the seat 20 includes at least a shell 21, on which a first air hole 211 and a second air hole (not shown) are provided in communication with the cavity 201. The connecting member 50 is a flange seat, which is disposed on the second air hole. The cavity 201 is connected to the PV valve 101. The design of this type of seat 20 makes it not only a support structure, but also a cavity 201 that allows gas to enter and exit and contains gas. When the seat 20 is set in the form of a shell 21, the shell 21 can form a passage with an external air source device (air filling system and air extraction system) to test the gas driving performance and vacuum performance of the PV valve. For specific testing methods, please refer to the marine high-speed vent valve testing device with application number 202321279462.2, which discloses that the high-speed vent valve is connected to the air storage tank. This is equivalent to the PV valve 101 of this application being set on the shell 21 through the connector 50. When the lifting rod 43 is disconnected from the valve stem 1021 and the valve stem 1021 is restored to its original state, the relevant performance can be tested.

[0041] Based on the above configuration, the seat 20 also includes an inner shell 22. The drive mechanism 30, the rotating shaft 41, and the cam 42 are located in the inner cavity 202 of the inner shell 22. The lifting rod 43 extends out of the inner shell 22. The configuration of the inner shell 22 can prevent the drive mechanism 30, the rotating shaft 41, and the cam 42 from interacting with the gas in the cavity 201.

[0042] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

Claims

1. A marine PV valve wire grinding device, characterized by, The utility model relates to a PV valve drive mechanism, comprising: a seat body, the upper end of which is provided with a connecting piece for fixing a PV valve, a driving mechanism arranged on the seat body, a transmission mechanism, which comprises a rotating shaft, a cam and a lifting rod, the rotating shaft is rotatably arranged on the seat body and connected with the driving mechanism, the cam is fixed on the rotating shaft, the upper end of the lifting rod is connected with the end of the valve rod away from the valve flap, and the lower end of the lifting rod is in abutment with the side wall connected at the head and tail of the cam, when the driving mechanism drives the rotating shaft and the cam to rotate, the lifting rod drives the valve rod and the valve flap to move up and down through the abutment with the cam and makes the valve flap vertically impact the valve line at the valve port.

2. The marine PV valve string grinding apparatus of claim 1, wherein, The side wall connected at the head and tail of the cam is provided with an impact notch.

3. The marine PV valve string grinding apparatus of claim 1, wherein, The driving mechanism comprises a motor, a first belt assembly, a driving shaft and a second belt assembly, the driving shaft is rotatably arranged on the seat body, the first belt assembly and the second belt assembly are sleeved on the driving shaft, the first belt assembly is connected with the motor, and the second belt assembly is connected with the rotating shaft.

4. The marine PV valve string grinding apparatus of claim 3, wherein, The seat body is provided with a plurality of bearings, and the driving shaft and the rotating shaft are rotatably arranged in the bearings.

5. The marine PV valve string grinding apparatus of claim 1, wherein, The seat body is provided with a guide sleeve, and the lifting rod is vertically movably arranged in the guide sleeve.

6. The marine PV valve string grinding apparatus of claim 1, wherein, The side wall connected at the head and tail of the cam is provided with a limiting groove, and the lower end of the lifting rod is in abutment in the limiting groove.

7. The marine PV valve string grinding apparatus of claim 1 or 6, wherein, The lifting rod comprises an upper rod and a lower rod, the lower part of the upper rod is provided with a threaded section, the upper end of the lower rod is provided with a threaded hole, the threaded section is screwed in the threaded hole to connect the upper rod and the lower rod, the other end of the upper rod is connected with the valve rod, and the other end of the lower rod is in abutment with the cam.

8. The marine PV valve string grinding apparatus of claim 7, wherein, The lower rod is provided with a positioning hole extending into the threaded hole, the positioning hole is provided with an internal thread, a jackscrew bolt in the positioning hole is in abutment on the threaded section, and the upper end of the upper rod is provided with a insertion hole for positioning the lower end of the valve rod.

9. The marine PV valve string grinding apparatus of claim 1, wherein, The seat body at least comprises an outer shell, the outer shell is provided with a first air hole and a second air hole in communication with a cavity thereof, the connecting piece is a flange seat arranged on the second air hole, and the cavity communicates with the PV valve.

10. The marine PV valve string grinding apparatus of claim 9, wherein, The seat body further comprises an inner shell, the driving mechanism, the rotating shaft and the cam are located in the inner cavity of the inner shell, and the lifting rod extends out of the inner shell.

Images