Novel crankshaft machining center hole plugging device

Abstract

The utility model relates to a novel crankshaft machining center hole plugging device which comprises a main body, a sleeve and a pressure monitoring part. The main body is a cylinder; the sleeve is a hollow cylinder; a plurality of mounting grooves are embedded in the end surface, close to the sleeve, of the main body and the outer wall of the sleeve; a pressure detection hole is formed in the position, corresponding to the end face of the sleeve, of the end face of the body and penetrates through the body and the sleeve. Positive pressure sealing is provided based on the spring, the movable plate and the sealing ring, and the plugging effect is good; the monitoring part based on elastic on-off can monitor the pressure in the center hole and remind a worker to overhaul the crankshaft when the pressure value is abnormal; and the plugging device is provided with the mounting disc, so that the plugging device can be conveniently processed, clamped and fixed, and is convenient to mount.

Description

Technical Field

[0001] The utility model relates to a field, in particular to a novel machine shaft machining center hole blocking device. Background Art

[0002] The main shafts of the unit include: turbine shaft, intermediate shaft, generator shaft, etc. During processing in the manufacturer, they are all equipped with center holes due to processing and manufacturing requirements. After leaving the factory, the center hole of the turbine shaft (on the runner side) needs to be sealed to prevent pressurized water, gas and other fluids in the runner chamber from leaking out along the center hole, thereby avoiding major accidents such as emergency shutdown of the unit.

[0003] The method usually adopted by the manufacturer to seal the center hole of the turbine shaft is to open a flat sealing groove on the carbon steel flange plug, fasten it to the position of the center hole with ordinary bolts, and then apply anti-rust paint on the surface of the flange plug and its fastening bolts.

[0004] Chinese utility model patent 201220614629.1 discloses a novel turbine shaft machining center hole plugging device, including a flange plug with a plane sealing groove and a fastening bolt, and the flange plug is provided with two side sealing grooves. The flange plug of the utility model is provided with two side sealing grooves, which improves the sealing performance. The flange plug and the fastening bolt of the utility model are made of stainless steel with strong corrosion resistance. The flange plug of the utility model is provided with a pressure test hole, which can check the sealing effect and ensure that it is installed in place once.

[0005] The current blocking device has the following defects:

[0006] Sealing is performed based on sealing grooves and sealing rings. To detect whether leakage or poor sealing occurs, staff still need to perform pressure tests regularly, which is inconvenient to use. It is also impossible to monitor the sealing effect of the sealing device at all times, which is inconvenient to use. Summary of the invention

[0007] Technical problems to be solved by the utility model

[0008] Sealing is performed based on sealing grooves and sealing rings. To detect whether leakage or poor sealing occurs, staff still need to perform pressure tests regularly, which is inconvenient to use. It is also impossible to monitor the sealing effect of the sealing device at all times, which is inconvenient to use.

[0009] Technical solutions for solving technical problems

[0010] Further advantageous and in some cases inventive embodiments and developments of the invention are explained in the following description.

[0011] A novel machine shaft machining center hole plugging device comprises a main body and a sleeve, and also comprises a pressure monitoring part;

[0012] The main body is configured as a cylinder, and the sleeve is configured as a hollow cylinder;

[0013] The end surface of the main body close to the sleeve and the outer wall of the sleeve are both embedded with a plurality of mounting grooves;

[0014] The end surface of the main body corresponds to the end surface of the sleeve, and a pressure detection hole is arranged through the main body and the sleeve, and the pressure detection hole is closed by a plug.

[0015] Preferably, a plurality of countersunk holes are arranged through the main body, and mounting bolts are arranged in the countersunk holes.

[0016] Preferably, the countersunk holes are evenly distributed in a circular array on the main body;

[0017] The plurality of countersunk holes in a circumferential array are vertically located outside the sleeve.

[0018] Preferably, the mounting groove is used for mounting a sealing ring or a rubber ring.

[0019] Preferably, the monitoring unit comprises:

[0020] A movable plate elastically slides on the inner side of the sleeve through a spring;

[0021] The connecting arm is set as an "L"-shaped arm and is respectively arranged on the end surface of the movable plate and the end surface of the main body;

[0022] The ends of the connecting arms facing each other are both provided with contacts;

[0023] A battery installed inside the sleeve;

[0024] The alarm is embedded in the end surface of the main body away from the sleeve.

[0025] Preferably, a sealing ring is provided on the outer edge of the movable plate;

[0026] The connecting arm, the storage battery, the alarm and the contact point form a circuit controlled by spring elasticity.

[0027] Preferably, a mounting plate is provided on the end surface of the main body away from the sleeve, and the mounting plate is threadedly assembled with the main body.

[0028] Preferably, the main body and the sleeve are integrally formed.

[0029] Effect of utility model

[0030] 1. Positive pressure sealing is provided by spring, movable plate and sealing ring, and the sealing effect is good;

[0031] 2. The monitoring unit based on elastic on-off can monitor the pressure in the center hole and remind the staff to inspect the machine shaft when the pressure value is abnormal;

[0032] 3. Equipped with an installation plate, it is convenient for processing the plugging device, and it is easy to clamp, fix and install. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] The following is a detailed description of the embodiments of the present invention according to the accompanying drawings. In the accompanying drawings:

[0034] Figure 1 This is the first structural view of the utility model;

[0035] Figure 2 It is the second structural view of the utility model;

[0036] Figure 3 This is a structural view of the hidden installation disk of the utility model;

[0037] Figure 4 This is the first structural view of the utility model, which hides the main body and the mounting plate;

[0038] Figure 5 This is a second structural view of the utility model that hides the main body and the mounting plate;

[0039] Figure 6 is the above Figure 5 A partial enlarged view of "A".

[0040] Description of Reference Numerals

[0041] 1. Main body; 1-1. Mounting groove; 101. Sleeve; 102. Pressure detection hole; 102-1. Plug; 2. Countersunk hole; 201. Mounting bolt; 3. Mounting plate; 301. Threaded hole; 4. Movable plate; 4-1. Sealing ring; 401. Spring; 402. Connecting arm; 402-1. Contact; 403. Battery; 404. Alarm. DETAILED DESCRIPTION

[0042] Hereinafter, a novel machine shaft machining center hole plugging device which is one embodiment of the present invention will be described with reference to the drawings.

[0043] Please refer to Figure 1-Figure 6 As shown, a novel machine shaft machining center hole plugging device comprises a main body 1 and a sleeve 101, and a detection part for monitoring pressure;

[0044] About the body 1 and the sleeve 101:

[0045] The main body 1 is configured as a cylinder, and the sleeve 101 is configured as a hollow cylinder;

[0046] Specifically, the main body 1 and the sleeve 101 are integrally formed;

[0047] The main body 1 is provided with a plurality of countersunk holes 2, and the main body 1 and the machine shaft are fastened by mounting bolts 201;

[0048] Specifically, a plurality of countersunk holes 2 are located on the main body 1 and are evenly distributed in a circular array;

[0049] More specifically, the plurality of countersunk holes 2 in a circumferential array are vertically located outside the sleeve 101;

[0050] The end surface of the main body 1 close to the sleeve 101 and the outer wall of the sleeve 101 are embedded with a plurality of mounting grooves 1-1;

[0051] Specifically, the mounting groove 1-1 is used to install a sealing ring and a rubber ring;

[0052] The end surface of the main body 1 away from the sleeve 101 is provided with a mounting plate 3;

[0053] Specifically, the mounting plate 3 is fixedly mounted on the main body 1 by being embedded in the threaded hole 301 on the end surface of the main body 1;

[0054] More specifically, a stud matching the threaded hole 301 is provided at the end of the mounting plate 3 close to the main body 1;

[0055] The end face of the main body 1 corresponds to the end face of the sleeve 101, and a pressure detection hole 102 is provided through the main body 1 and the sleeve 101. The pressure detection hole 102 is closed by a plug 102-1;

[0056] Regarding the monitoring department, including:

[0057] The movable plate 4 is slidably arranged inside the sleeve 101;

[0058] Specifically, a sealing ring 4-1 is embedded in the outer edge of the movable plate 4;

[0059] More specifically, the sealing ring 4 - 1 is used to achieve sealing between the movable plate 4 and the sleeve 101 ;

[0060] The movable plate 4 is located inside the sleeve 101 and is elastically connected to the main body 1 via a spring 401;

[0061] The connecting arm 402 is configured as an "L"-shaped arm;

[0062] The connecting arm 402 is disposed on the end surface of the main body 1 close to the sleeve 101 and is located inside the sleeve 101;

[0063] The connecting arm 402 is disposed on the end surface of the movable plate 4 close to the main body 1;

[0064] The ends of the two connecting arms 402 are alternately arranged, and the ends facing each other are both provided with a contact 402-1;

[0065] The battery 403 is installed on the end surface of the main body 1 close to the sleeve 101 and is located inside the sleeve 101;

[0066] The alarm 404 is embedded in the end surface of the main body 1 away from the sleeve 101;

[0067] During use, the battery 403, the alarm 404, the connecting arm 402 and the contact 402-1 are electrically connected, the movable plate 4 is subjected to the pressure in the central hole of the machine shaft, the spring 401 is compressed, the connecting arm 402 and the contact 402-1 are separated, the circuit is disconnected, and the alarm 404 does not work. When the pressure in the central hole of the machine shaft changes, the spring 401 extends, driving the two connecting arms 402 to move, the contact 402-1 contacts, the circuit is connected, the battery 403 supplies power to the alarm 404, and the alarm 404 works to alarm, reminding the staff to check;

[0068] Normally used status

[0069] The staff inserts the sealing ring and the rubber ring into the installation groove 1-1, installs the blocking device on the end face of the center hole of the machine shaft through the countersunk hole 2 on the main body 1 and the installation bolt 201, and inserts the sleeve 101 into the center hole of the machine shaft;

[0070] The sealing ring on the outer wall of the sleeve 101 is located between the sleeve 101 and the center hole, and the sealing ring on the end face of the main body 1 is located between the main body 1 and the end face of the center hole to achieve blocking;

[0071] Monitoring function

[0072] The monitoring unit located in the sleeve 101 can monitor the pressure in the center hole and send out an alarm through the alarm 404 when the pressure drops, reminding the staff to perform maintenance;

[0073] Specifically, the staff can select a suitable spring 401 according to the pressure in the center hole of the crankshaft;

[0074] Moreover, it adopts the battery 403 for power supply and has a flexible on-off setting, so it has high reliability and long service life;

[0075] Compared with the prior art, the utility model has the following characteristics:

[0076] 1. Positive pressure sealing is provided by the spring 401, the movable plate 4 and the sealing ring 4-1, and the sealing effect is good;

[0077] 2. The monitoring unit based on elastic on-off can monitor the pressure in the center hole and remind the staff to inspect the machine shaft when the pressure value is abnormal;

[0078] 3. It is equipped with a mounting plate 3, which is convenient for processing the plugging device and is easy to clamp, fix and install.

[0079] The present invention is not limited to the embodiment, and various modifications can be made without departing from the spirit of the present invention.

Claims

1. A novel machine shaft machining center hole plugging device, comprising a main body (1) and a sleeve (101), characterized in that: It also includes a pressure monitoring unit; The main body (1) is configured as a cylinder, and the sleeve (101) is configured as a hollow cylinder; The end surface of the main body (1) close to the sleeve (101) and the outer wall of the sleeve (101) are both embedded with a plurality of installation grooves (1-1); The end surface of the main body (1) corresponds to the end surface of the sleeve (101), and a pressure detection hole (102) is provided through the main body (1) and the sleeve (101), and the pressure detection hole (102) is closed by a plug (102-1).

2. The novel machine shaft machining center hole plugging device according to claim 1 is characterized in that: A plurality of countersunk holes (2) are arranged through the main body (1), and mounting bolts (201) are arranged in the countersunk holes (2).

3. The novel machine shaft machining center hole plugging device according to claim 2 is characterized in that: The countersunk holes (2) are located on the main body (1) and are evenly distributed in a circular array; The plurality of countersunk holes (2) arranged in a circular array are all vertically located outside the sleeve (101).

4. The novel machine shaft machining center hole plugging device according to claim 1 is characterized in that: The installation groove (1-1) is used for installing a sealing ring and a rubber ring.

5. The novel machine shaft machining center hole plugging device according to claim 1 is characterized in that: The monitoring unit comprises: A movable plate (4) elastically slides inside the sleeve (101) via a spring (401); The connecting arm (402) is configured as an "L"-shaped arm and is respectively disposed on the end surface of the movable plate (4) and the end surface of the main body (1); The facing ends of the connecting arms (402) are both provided with contacts (402-1); A storage battery (403) is installed inside the sleeve (101); An alarm (404) is embedded in an end surface of the main body (1) away from the sleeve (101).

6. The novel machine shaft machining center hole plugging device according to claim 5 is characterized in that: The outer edge of the movable plate (4) is provided with a sealing ring (4-1); The connecting arm (402), the storage battery (403), the alarm (404), and the contact (402-1) form a circuit that is elastically controlled by a spring (401).

7. The novel machine shaft machining center hole plugging device according to claim 1 is characterized in that: A mounting plate (3) is provided on the end surface of the main body (1) away from the sleeve (101), and the mounting plate (3) is threadedly assembled with the main body (1).

8. The novel machine shaft machining center hole plugging device according to claim 1 is characterized in that: The main body (1) and the sleeve (101) are integrally formed.

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