Automatic locking device of net blanket corrector

Abstract

An automatic locking device for a net blanket corrector comprises a pneumatic tire mounting seat, a constant-pressure pneumatic tire, a control-pressure pneumatic tire, two groups of automatic locking devices, a constant-pressure air source and a control-pressure air source, the constant-pressure pneumatic tire and the control-pressure pneumatic tire are arranged at the left end and the right end of the pneumatic tire mounting seat respectively, the two sets of automatic locking devices are arranged on the front side and the rear side of the pneumatic tire mounting seat respectively, and the constant-pressure air source is connected with the constant-pressure pneumatic tire and one of the automatic locking devices through air channels. The control pressure air source is respectively connected with the control pressure pneumatic tire and the other automatic locker through air paths; and each of the two groups of automatic locking devices comprises a limiting rack, a single-acting cylinder and a locking needle. According to the utility model, the automatic locking device is additionally arranged on the net blanket corrector, so that the net blanket not only has a reliable correction function, but also can automatically lock the correction roller under the condition that a pneumatic tire loses pressure, and the problem of rapid deviation of the net blanket is prevented; the utility model has the advantages of strong practicability and strong popularization significance.

Description

Technical Field

[0001] The utility model relates to the field of papermaking production, in particular to an automatic locking device for a mesh blanket corrector. Background Art

[0002] The cloth corrector is a very important key device on the paper machine. When the paper machine is running, the pressure of the compressed air in the pneumatic tire can be adjusted by the corrector to drive the correction roller to swing, so that the cloth can run stably in a fixed position.

[0003] The existing corrector can achieve stable operation of the blanket, but it has a big flaw. When the air circuit fails, the constant pressure air tire or the controlled pressure air tire loses pressure, and the correction roller will quickly move to the side where the pressure is lost, causing the corrector to lose the function of adjusting the blanket position, causing the blanket to deviate quickly. The deviation of the blanket will lead to serious consequences such as abnormal shutdown of the paper machine for a long time, scrapping of the blanket and damage to related equipment, resulting in relatively large economic and property losses. Utility Model Content

[0004] Based on this, it is necessary to provide an automatic locking device for a mesh carpet corrector in view of the deficiencies in the prior art.

[0005] An automatic locking device for a mesh carpet corrector comprises a pneumatic tire mounting seat, a constant pressure pneumatic tire, a controlled pressure pneumatic tire, two groups of automatic lockers, a constant pressure air source and a controlled pressure air source. The constant pressure pneumatic tire and the controlled pressure pneumatic tire are respectively mounted on the left and right ends of the pneumatic tire mounting seat, the two groups of automatic lockers are respectively arranged on the front and rear sides of the pneumatic tire mounting seat, the constant pressure air source is respectively connected to the constant pressure pneumatic tire and one of the automatic lockers air circuits, and the controlled pressure air source is respectively connected to the controlled pressure pneumatic tire and the other automatic locker air circuit. Both groups of automatic lockers comprise a limit rack, a single-acting cylinder and a locking pin, the limit rack is fixedly mounted on the pneumatic tire mounting seat, the single-acting cylinder is arranged opposite to the limit rack, one end of the locking pin is mounted on the single-acting cylinder and can be driven to extend and retract by the single-acting cylinder, and the other end of the locking pin can be mutually engaged with the limit rack to limit the position.

[0006] Furthermore, the single-acting cylinder includes a cylinder body, a piston and a spring. The cylinder body is a hollow structure, the piston is mounted in the cylinder body to divide its internal space into a rod cavity and a rodless cavity, the locking pin is inserted into the rod cavity from an outer end of the cylinder body and connected to the piston, the spring is located in the rodless cavity and its two ends are respectively against the inner side of the cylinder body and one side of the piston. The constant pressure air source and the control pressure air source are respectively connected to the rod cavity air paths of the two sets of single-acting cylinders.

[0007] Furthermore, the constant pressure air source includes a first air source, a first hand valve and a constant pressure pressure reducing valve. The first air source, the first hand valve and the constant pressure pressure reducing valve are connected in sequence, and the constant pressure pressure reducing valve is also connected to the constant pressure air tire and an automatic locking device air circuit respectively.

[0008] Furthermore, the control pressure gas source includes a second gas source, a second manual valve, a control pressure reducing valve and a throttle valve. The second gas source, the second manual valve, the control pressure reducing valve and the throttle valve are connected in sequence, and the throttle valve is also connected to the control pressure pneumatic tire and another automatic locking device gas circuit respectively.

[0009] Furthermore, the control pressure air source also includes a corrector exhaust valve, and the air circuit of the corrector exhaust valve is connected between the control pressure air source, the control pressure air tire and the automatic locker.

[0010] In summary, the beneficial effect of the automatic locking device of the mesh carpet corrector of the utility model is that by adding an automatic locking device to the mesh carpet corrector, the mesh carpet can not only have a reliable correction function during normal operation, but also can automatically lock the correction roller when the air tire loses pressure, to prevent the correction roller from suddenly moving sharply and causing the mesh carpet to deviate rapidly; thereby, the staff can have enough time to determine whether to perform online maintenance or shut down for maintenance, thereby avoiding damage to the mesh carpet and related equipment caused by loss of pressure in the air tire of the corrector to the greatest extent, reducing abnormal downtime, and saving a lot of manpower, material resources and economic losses; the utility model is highly practical and has a strong promotion significance. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a schematic diagram of the gas circuit connection of an automatic locking device for a mesh carpet corrector of the utility model;

[0012] Figure 2 This is a schematic diagram of the installation structure of an automatic locking device for a mesh carpet corrector of the utility model;

[0013] Figure 3 for Figure 2 Schematic diagram of the structure of the automatic locking device. DETAILED DESCRIPTION

[0014] In order to make the purpose, technical solution and advantages of the utility model more clear, the utility model is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the utility model and are not used to limit the utility model.

[0015] like Figures 1 to 3As shown, the utility model provides an automatic locking device 100 for a mesh corrector, which includes a pneumatic tire mounting seat 10, a constant pressure pneumatic tire 20, a controlled pressure pneumatic tire 30, two sets of automatic lockers 40, a constant pressure air source 50 and a controlled pressure air source 60.

[0016] The constant pressure pneumatic tire 20 and the controlled pressure pneumatic tire 30 are respectively installed on the left and right ends of the pneumatic tire mounting seat 10, and the two groups of automatic lockers 40 are respectively arranged on the front and rear sides of the pneumatic tire mounting seat 10. The constant pressure air source 50 is respectively connected to the constant pressure pneumatic tire 20 and one of the automatic lockers 40, and the controlled pressure air source 60 is respectively connected to the controlled pressure pneumatic tire 30 and the other automatic locker 40.

[0017] When the carpet is in normal working state, the constant pressure air source 50 supplies air to the constant pressure air tire 20 and one of the automatic lockers 40, and the controlled pressure air source 60 supplies air to the controlled pressure air tire 30 and the other automatic locker 40. The constant pressure air tire 20 and the controlled pressure air tire 30 supplied with air both work normally, so that the correction roller on the carpet corrector maintains its position to correct the carpet, and at this time, the two sets of automatic lockers 40 are also in unlocked state due to air supply, and will not interfere with the position of the correction roller.

[0018] When at least one of the air supply lines of the constant pressure air source 50 or the controlled pressure air source 60 is abnormal, the constant pressure air tire 20 or (and) the controlled pressure air tire 30 will also lose the ability to adjust the position of the correction roller, causing the correction roller to deviate significantly and thus causing the carpet to deviate. However, since the additional automatic locker 40 also loses air supply at this time, it will immediately change from an unlocked state to a locked state, thereby locking the correction roller and the pressure air tire to each other, and ultimately effectively avoiding the problem of the correction roller deviating significantly and causing the carpet to deviate.

[0019] The two groups of automatic lockers 40 both include a limit rack 41, a single-acting cylinder 42 and a locking pin 43. The limit rack 41 is fixedly mounted on the pneumatic tire mounting seat 10, and the single-acting cylinder 42 is arranged opposite to the limit rack 41. One end of the locking pin 43 is mounted on the single-acting cylinder 42 and can be driven to extend and retract by the single-acting cylinder 42. The other end of the locking pin 43 can be engaged with the limit rack 41 to limit the position.

[0020] The single-acting cylinder 42 only drives the locking pin 43 in one direction when receiving air supply, so that the locking pin 43 moves toward the side away from the limiting rack 41, ensuring that the automatic locker 40 is in the unlocked state when the air supply path is normal. When the single-acting cylinder 42 loses air supply, it will immediately drive the locking pin 43 to return to the side close to the limiting rack 41, and the limiting locking between the correction roller and the air tire is achieved through the mutual limiting between the locking pin 43 and the limiting rack 41.

[0021] The single-acting cylinder 42 includes a cylinder body 421, a piston 422 and a spring 423. The cylinder body 421 is a hollow structure, and the piston 422 is mounted in the cylinder body 421 to divide its internal space into a rod cavity 421a and a rodless cavity 421b. The locking needle 43 is inserted into the rod cavity 421a from an outer end of the cylinder body 421 and connected to the piston 422. The spring 423 is located in the rodless cavity 421b and its two ends are respectively pressed against the inner side of the cylinder body 421 and one side of the piston 422. The constant pressure air source 50 and the control pressure air source 60 are respectively connected to the air paths of the rod cavities 421a of the two sets of single-acting cylinders 42.

[0022] When the air source connected to the rod cavity 421a supplies air to the inside of the cylinder 421, the air pressure will push the piston 422 toward the rodless cavity 421b, thereby driving the locking pin 43 connected to the piston 422 to retract toward the inside of the cylinder 421, so that the outer end of the locking pin 43 is away from the limit rack 41 to unlock the automatic locker 40. When the air source gas circuit is abnormal and cannot supply air to the inside of the cylinder 421, the spring 423 in the rodless cavity 421b will push the piston 422 toward the rod cavity 421a, thereby driving the locking pin 43 to extend toward the outside of the cylinder 421, so that the outer end of the locking pin 43 is close to the limit rack 41 to achieve the locking limit of the automatic locker 40.

[0023] The constant pressure air source 50 includes a first air source 51, a first hand valve 52 and a constant pressure reducing valve 53. The first air source 51, the first hand valve 52 and the constant pressure reducing valve 53 are connected in sequence, and the constant pressure reducing valve 53 is also connected in air circuit with the constant pressure air tire 20 and an automatic locker 40. The constant pressure air source 50 with the first hand valve 52 can manually control the air supply or stop the air supply, so that the carpet equipment can be inspected and maintained at any time. The reducing valve can make the air supply of the air source more stable, avoiding air pressure fluctuations that affect the normal operation of the carpet corrector.

[0024] The control pressure gas source 60 includes a second gas source 61, a second hand valve 62, a control pressure reducing valve 63 and a throttle valve 64. The second gas source 61, the second hand valve 62, the control pressure reducing valve 63 and the throttle valve 64 are connected in sequence, and the throttle valve 64 is also connected in gas circuits to the control pressure air tire 30 and another automatic locking device 40. The control pressure gas source 60 also includes a corrector exhaust valve 65, and the corrector exhaust valve 65 is connected in gas circuits between the control pressure gas source 60, the control pressure air tire 30 and the automatic locking device 40.

[0025] Similarly, the control pressure air source 60 with the second manual valve 62 can manually control the air supply or stop the air supply, so that the carpet equipment can be inspected and maintained at any time. The pressure reducing valve can make the air supply of the air source more stable, avoiding the air pressure fluctuation that affects the normal operation of the carpet corrector. As for the throttle valve 64 and the corrector exhaust valve 65, the flow rate and discharge of the air supply of the air source can be freely controlled, so that the control pressure air tire 30 can accurately adjust the position of the correction roller.

[0026] In summary, the beneficial effects of the automatic locking device 100 of the mesh corrector of the utility model are: by adding an automatic locking device to the mesh corrector, the mesh can not only have a reliable correction function during normal operation, but also can automatically lock the correction roller when the air tire loses pressure, to prevent the correction roller from suddenly moving sharply and causing the mesh to deviate rapidly; thereby, the staff can have enough time to determine whether to perform online maintenance or shut down for maintenance, thereby avoiding damage to the mesh and related equipment caused by loss of pressure in the air tire of the corrector to the greatest extent, reducing abnormal downtime, and saving a lot of manpower, material resources and economic losses; the utility model is highly practical and has a strong promotion significance.

[0027] The above-mentioned embodiment only expresses one implementation method of the utility model, and its description is relatively specific and detailed, but it cannot be understood as limiting the scope of the utility model patent. It should be pointed out that for ordinary technicians in this field, several modifications and improvements can be made without departing from the concept of the utility model, which all belong to the protection scope of the utility model. Therefore, the protection scope of the utility model patent shall be based on the attached claims.

Claims

1. An automatic locking device for a carpet corrector, characterized in that: It includes a pneumatic tire mounting seat, a constant-pressure pneumatic tire, a controlled-pressure pneumatic tire, two groups of automatic locking devices, a constant-pressure air source and a controlled-pressure air source; the constant-pressure pneumatic tire and the controlled-pressure pneumatic tire are respectively mounted on the left and right ends of the pneumatic tire mounting seat, the two groups of automatic locking devices are respectively arranged on the front and rear sides of the pneumatic tire mounting seat, the constant-pressure air source is respectively connected to the constant-pressure pneumatic tire and one of the automatic locking devices, and the controlled-pressure air source is respectively connected to the controlled-pressure pneumatic tire and the other automatic locking device; the two groups of automatic locking devices each include a limit rack, a single-acting cylinder and a locking pin, the limit rack is fixedly mounted on the pneumatic tire mounting seat, the single-acting cylinder is arranged opposite to the limit rack, one end of the locking pin is mounted on the single-acting cylinder and can be driven to retract and retract by the single-acting cylinder, and the other end of the locking pin can be engaged with the limit rack to limit the position.

2. The automatic locking device for a carpet corrector according to claim 1, characterized in that: The single-acting cylinder includes a cylinder body, a piston and a spring; the cylinder body is a hollow structure, the piston is mounted in the cylinder body to divide its internal space into a rod cavity and a rodless cavity, the locking needle is passed through the rod cavity from an outer end of the cylinder body and is connected to the piston, the spring is located in the rodless cavity and its two ends are respectively against the inner side of the cylinder body and one side of the piston; the constant pressure air source and the control pressure air source are respectively connected to the rod cavity air paths of the two groups of single-acting cylinders.

3. The automatic locking device for a carpet corrector according to claim 1, characterized in that: The constant pressure air source includes a first air source, a first hand valve and a constant pressure reducing valve; the first air source, the first hand valve and the constant pressure reducing valve are connected in sequence, and the constant pressure reducing valve is also connected to the constant pressure air tire and an automatic locking device air circuit respectively.

4. The automatic locking device for a carpet corrector according to claim 1, characterized in that: The control pressure air source includes a second air source, a second manual valve, a control pressure reducing valve and a throttle valve; the second air source, the second manual valve, the control pressure reducing valve and the throttle valve are connected in sequence, and the throttle valve is also respectively connected to the control pressure air tire and another automatic locking device air circuit.

5. The automatic locking device for a carpet corrector according to claim 1, characterized in that: The control pressure gas source also includes a corrector exhaust valve, and the corrector exhaust valve air circuit is connected between the control pressure gas source, the control pressure air tire and the automatic locker.

Images