Abrasion detection device for normal-pressure cutterhead hob
By setting a mechanical detection device with guide channels and wear detection rods on the normal pressure cutter drum, the problem of inaccurate wear detection of the normal pressure cutter drum hob is solved, fast and accurate measurement of wear amount is achieved, and the excavation efficiency is improved.
Patent Information
- Application Number
- CN202422143892.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-09-02
- Publication Date
- 2025-07-01
- Estimated Expiration
- 2034-09-02
AI Technical Summary
In the prior art, the wear detection of the hob of the atmospheric pressure cutter is inaccurate, which leads to the need to remove the cutter barrel for inspection, which consumes time and effort, affects the excavation efficiency.
A mechanical wear detection device for normal pressure cutter plate hob is designed. By setting up a guide channel and wear detection rod on the cutter barrel, the wear amount of the hob is directly measured without removing the cutter barrel.
It realizes rapid and accurate detection of the hob wear amount under normal pressure conditions, reduces the disassembly and assembly time loss caused by inaccurate detection, and improves the excavation efficiency.
Smart Images
Figure CN223050584U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of wear detection, in particular to an atmospheric pressure cutter head hob wear detection device. Background Technique
[0002] In long-distance tunnel boring, the atmospheric pressure cutter head has the advantage of changing tools under atmospheric pressure conditions, and the application of atmospheric pressure cutter head shield is increasing. In the use of the atmospheric pressure cutter head, the accuracy of tool wear detection and the time for replacing the cutter barrel under atmospheric pressure are important factors affecting the tunneling efficiency.
[0003] In the prior art, for the wear detection of the atmospheric pressure cutter head hob, an electrical detection method is mostly adopted, and the wear amount of the hob is calculated by an intermediate measurement method. For example, in the Chinese utility model patent application with the publication number CN108181484A and the utility model creation name of an atmospheric pressure cutter head hob rotation speed and temperature measurement device and a wear amount measurement method, the adopted method is: using a rotation speed sensor and an induction magnet to measure the rotation speed of the hob when it rotates, and then calculating the current hob radius by using the cutter head rotation speed and the distance from the hob to the center of the cutter head. The difference between the current radius and the initial installed hob radius is the wear amount. However, when the atmospheric pressure cutter head rotates, there is a lot of muck inside the cutter head, and the detection between the rotation speed sensor and the induction magnet is easily interfered, resulting in inaccurate detection or failure. When the wear detection is abnormal, it is necessary to remove the atmospheric pressure hob cutter barrel for inspection. However, the removal is time-consuming and laborious. Especially when the wear amount of the hob is within the normal range after removal, the cutter barrel needs to be reinstalled again, and this disassembly and assembly process belongs to time loss.
[0004] Therefore, it is necessary to design a mechanical tool wear detection device that does not require removing the cutter barrel to solve the time loss caused by inaccurate tool wear detection under dynamic conditions, thereby improving the tunneling efficiency of the atmospheric pressure cutter head shield. Content of the Utility Model
[0005] The purpose of the utility model is to provide an atmospheric pressure cutter head hob wear detection device to solve the problems of inaccurate current hob wear measurement or time-consuming and laborious measurement caused by removing the hob for measurement.
[0006] The above technical purpose of the utility model is mainly achieved by the following technical means:
[0007] On the one hand, the utility model provides an atmospheric pressure cutter head hob wear detection device. A cutter barrel is provided on the cutter head. The atmospheric pressure cutter head hob wear detection device is used for measuring the wear amount of the hob on the cutter barrel. The atmospheric pressure cutter head hob wear detection device includes:
[0008] A guiding channel opened on the cutter barrel, the guiding channel extending along the radial direction of the hob and capable of communicating the inner cavity of the cutter barrel and the external space;
[0009] A wear detection rod is movably inserted into the guiding channel. By moving the wear detection rod along the guiding channel towards the hob, the end of the wear detection rod is abutted against the cutting edge of the hob, and the wear amount of the hob is obtained according to the insertion length of the wear detection rod.
[0010] For the atmospheric pressure cutter head hob wear detection device of the present utility model, a mechanical structure is adopted to directly measure the wear amount of the atmospheric pressure hob. Under the condition that the atmospheric pressure cutter barrel is under pressure, the wear amount of the hob can be directly measured without removing the cutter barrel of the atmospheric pressure hob; the test structure is simple and the test method is fast and accurate, which can effectively solve the problem of time-consuming disassembly and assembly of the cutter barrel caused by inaccurate wear detection of the hob under dynamic conditions, minimize the time of ineffective disassembly and assembly of the atmospheric pressure cutter barrel as much as possible, and improve the tunneling efficiency of the equipment.
[0011] In a preferred embodiment of the present utility model, a water injection channel extending along the length direction is provided in the wear detection rod, and one end of the water injection channel can be connected to a water source to wash the hob.
[0012] In this embodiment, during actual use, there is accumulated slag inside the cutter barrel. A water injection channel is designed inside the wear detection rod. During the process of inserting the wear detection rod into the guiding channel, the water injection channel is opened to wash the muck at the end of the wear detection rod with water, so as to clean the muck inside the cutter barrel, ensure that there is no muck between the end of the wear detection rod and the cutting edge of the hob, and improve the measurement accuracy.
[0013] In a preferred embodiment of the present utility model, a sealing gasket is provided at one end of the guiding channel.
[0014] In this embodiment, the sealing gasket can achieve the seal between the cutter barrel and the wear detection rod, and prevent the mud and slag inside the cutter barrel from leaking through the guiding channel.
[0015] In a preferred embodiment of the present utility model, the sealing gasket is provided on the outer side wall of the cutter barrel, and the wear detection rod can pass through the sealing gasket and extend into the guiding channel.
[0016] In this embodiment, the sealing gasket is arranged on the outer side of the cutter barrel, which is convenient for installation and replacement.
[0017] In a preferred embodiment of the present utility model, a switching valve is provided on the outer side wall of the cutter barrel corresponding to the guiding channel. The switching valve is communicated with the guiding channel to realize the on or off of the guiding channel, and the wear detection rod can pass through the switching valve and extend into the guiding channel.
[0018] In this embodiment, when measurement is not being carried out, the wear detection rod is taken out from the guiding channel, and at the same time, the switching valve is closed to ensure the sealing of the inner cavity of the cutter barrel, and at the same time, damage to the wear detection rod during the operation of the hob can be avoided.
[0019] In a preferred embodiment of the present utility model, a sealing seat is provided at one end of the switching valve, and the wear detection rod can pass through the sealing seat and extend into the switching valve.
[0020] In this embodiment, the sealing seat can achieve the sealing between the switching valve and the wear detection rod, and prevent the mud and slag in the cutter barrel from leaking through the guiding channel and the switching valve.
[0021] In a preferred embodiment of the present utility model, an O-ring seal is provided in the sealing seat.
[0022] In a preferred embodiment of the present utility model, an abutting thin sheet capable of abutting against the cutting edge of the hob is provided at one end of the wear detection rod facing the hob.
[0023] In this embodiment, the thin sheet structure at the end of the wear detection rod can reduce the accumulation of muck at the end of the wear detection rod, enabling the wear detection rod to accurately abut against the cutting edge of the hob and improving the accuracy of the measurement results.
[0024] On the other hand, the present utility model also provides a method for detecting the wear of a hob of an atmospheric pressure cutter head, which uses the above-mentioned atmospheric pressure cutter head wear detection device for detection. The detection method includes:
[0025] Step S1: Install an unworn hob on the cutter barrel;
[0026] Step S2: Insert a wear detection rod with a length of L into the guiding channel on the cutter barrel and abut it against the hob, and measure the length L0 of the wear detection rod inserted into the cutter barrel or the remaining length (L - L0) of the wear detection rod outside the cutter barrel;
[0027] Step S3: Install the cutter barrel on the cutter head for tunneling operations;
[0028] Step S4: After operating for a period of time, insert the wear detection rod into the guiding channel on the cutter barrel again and abut it against the hob online, and measure the length L1 of the wear detection rod inserted into the cutter barrel or the remaining length (L - L1) of the wear detection rod outside the cutter barrel;
[0029] Step S5: Obtain the wear amount of the hob as (L1 - L0) based on the length difference between the two times before and after, and determine whether it is necessary to replace the hob according to the wear amount.
[0030] The wear detection method of the atmospheric pressure cutter head hob of the present utility model can directly measure the wear amount of the hob without removing the cutter barrel of the atmospheric pressure hob under the condition that the atmospheric pressure cutter barrel is under pressure; the test method is fast and accurate, which can effectively solve the problem of time-consuming disassembly and assembly of the cutter barrel caused by inaccurate wear detection of the hob under dynamic conditions, minimize the time of ineffective disassembly and assembly of the atmospheric pressure cutter barrel as much as possible, and improve the tunneling efficiency of the equipment.
[0031] In a preferred embodiment of the present utility model, a water injection channel extending along the length direction thereof is provided in the wear detection rod; before detecting the worn hob, a water source is connected to one end of the water injection channel to wash the hob.
[0032] In this embodiment, before measuring the worn hob, the hob is washed through the water injection channel to clean the muck in the cutter barrel, ensuring that there is no muck between the end of the wear detection rod and the cutting edge of the hob, and improving the measurement accuracy. Brief Description of the Drawings
[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the following will briefly introduce the drawings required for use in the description of the embodiments or the prior art. Obviously, the following drawings are only some embodiments of the present utility model. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings. In the drawings:
[0034] The drawings described herein are only for the purpose of explanation and are not intended to limit the scope of the disclosure of the present utility model in any way. In addition, the shapes and proportional dimensions of the components in the drawings are only schematic and are used to help understand the present utility model, rather than specifically limiting the shapes and proportional dimensions of the components of the present utility model. Those skilled in the art can select various possible shapes and proportional dimensions according to the specific situation to implement the present utility model under the teaching of the present utility model.
[0035] Figure 1 It is a schematic structural diagram of the wear detection device for the atmospheric pressure cutter head hob of the present utility model;
[0036] Figure 2 It is a schematic structural diagram of another embodiment of the wear detection device for the atmospheric pressure cutter head hob of the present utility model;
[0037] Figure 3 It is a schematic structural diagram of the first state of the wear detection device for the atmospheric pressure cutter head hob of the present utility model;
[0038] Figure 4 It is a schematic structural diagram of the second state of the wear detection device for the atmospheric pressure cutter head hob of the present utility model;
[0039] Figure 5 Schematic diagram of the combined structure of the wear detection rod and the sealing seat described in the present utility model;
[0040] Figure 6 is Figure 5 Partial enlarged structural diagram of part A in
[0041] Figure 7 Partial enlarged view of one end of the wear detection rod described in the present utility model.
[0042] Explanation of reference numerals:
[0043] 10, cutter barrel; 11, hob; 12, guiding channel;
[0044] 20, wear detection rod; 21, water injection channel; 22, abutting thin sheet;
[0045] 30, sealing gasket; 40, switching valve; 50, sealing seat. Detailed implementation manners
[0046] In order to enable those skilled in the art of the present technology to better understand the technical solutions in the present utility model, the following will clearly and completely describe the technical solutions in the embodiments of the present utility model in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present utility model.
[0047] It should be noted that when an element is referred to as being "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "left", "right" and similar expressions used herein are only for the purpose of illustration and do not represent the only embodiments.
[0048] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by those skilled in the technical field to which the present utility model belongs. The terms used in the description of the present utility model herein are only for the purpose of describing specific embodiments and are not intended to limit the present utility model. The term "and / or" used herein includes any and all combinations of one or more of the related listed items.
[0049] Embodiment 1:
[0050] As Figure 1 and Figure 2As shown in the figure, the present utility model provides an atmospheric pressure cutter head hob wear detection device. A cutter barrel 10 is provided on the cutter head. The atmospheric pressure cutter head hob wear detection device is used for measuring the wear amount of the hob 11 on the cutter barrel 10. The atmospheric pressure cutter head hob wear detection device includes: a guiding channel 12 opened on the cutter barrel 10, the guiding channel 12 extends along the radial direction of the hob 11 and can communicate the inner cavity of the cutter barrel 10 and the external space; a wear detection rod 20 movably inserted into the guiding channel 12. By moving the wear detection rod 20 along the guiding channel 12 towards the hob 11, the end of the wear detection rod 20 is made to abut against the cutting edge of the hob 11, and the wear amount of the hob 11 is obtained according to the insertion length of the wear detection rod 20.
[0051] For the atmospheric pressure cutter head hob wear detection device described in the present utility model, a mechanical structure is adopted to directly measure the wear amount of the atmospheric pressure hob 11. Under the condition that the atmospheric pressure cutter barrel 10 is under pressure, the wear amount of the hob 11 can be directly measured without removing the cutter barrel 10 of the atmospheric pressure hob 11; the test structure is simple and the test method is fast and accurate, which can effectively solve the problem of time-consuming disassembly and assembly of the cutter barrel 10 caused by inaccurate wear detection of the hob 11 under dynamic conditions, minimize the time of ineffective disassembly and assembly of the atmospheric pressure cutter barrel 10 as much as possible, and improve the tunneling efficiency of the equipment.
[0052] The following will detail the specific structures of the various parts of the atmospheric pressure cutter head hob wear detection device described in the present utility model, as well as the connection relationships between the various parts.
[0053] On the atmospheric pressure cutter head of the tunneling equipment, a plurality of cutter barrels 10 are installed in a certain pattern. At least one hob 11 is rotatably connected to each cutter barrel 10. Based on the rotation of the atmospheric pressure cutter head, the hob 11 inside the cutter barrel 10 can also rotate to achieve tunneling operations. During continuous tunneling, the hob 11 inside the cutter barrel 10 will wear after long-term use. When the wear amount of the hob 11 reaches a certain level, the tunneling speed will decrease significantly. At this time, it is necessary to replace the hob 11 inside the cutter barrel 10. However, how to quickly and accurately measure the wear amount of the hob 11 on the atmospheric pressure cutter head is a technical problem urgently to be solved in the field. The atmospheric pressure cutter head hob wear detection device proposed by the present utility model can solve the above problems and can measure the wear amount of the hob 11 without disassembling the cutter barrel 10, specifically as follows:
[0054] As Figure 1 shown, after the cutter barrel 10 is installed with the hob 11, a relatively closed inner cavity is formed inside it. The hob 11 extends from one side (front side) of the cutter barrel 10, and a guiding channel 12 is opened on the cavity wall on the other side (rear side) of the cutter barrel 10. The guiding channel 12 is arranged opposite to the cutting edge of the hob 11 and the guiding channel 12 extends along the radial direction of the hob 11.
[0055] The wear detection rod 20 is movably inserted into the guiding channel 12. The wear detection rod 20 is a long and thin rod, and its diameter is slightly smaller than the inner diameter of the guiding channel 12, so that the wear detection rod 20 can smoothly move along the guiding channel 12. When it is necessary to detect the wear amount of the hob 11, the wear detection rod 20 is inserted into the inner cavity of the cutter barrel 10 along the guiding channel 12 towards the hob 11, and one end of the wear detection rod 20 is abutted against the cutting edge of the hob 11. By measuring the change in the length of the wear detection rod 20 inserted into the cutter barrel 10 or the change in the remaining length of the wear detection rod 20 outside the cutter barrel 10, the wear amount of the hob 11 can be obtained.
[0056] The structure and technical effects of the preferred embodiment of the atmospheric pressure cutter head hob wear detection device of the present invention will be further described below.
[0057] According to an embodiment of the present invention, as Figure 1 and Figure 5 shown, a water injection channel 21 extending along the length direction is provided in the wear detection rod 20, and one end of the water injection channel 21 can be connected to a water source to wash the hob 11.
[0058] During actual use, there is slag accumulation inside the cutter barrel 10. A water injection channel 21 is designed inside the wear detection rod 20, and one end of the water injection channel 21 can be connected to a high-pressure water source; during the process of inserting the wear detection rod 20 into the guiding channel 12, the high-pressure water source connected to the water injection channel 21 is opened to wash the muck at the end of the wear detection rod 20 with water, so as to clean the muck inside the cutter barrel 10, ensure that there is no muck between the end of the wear detection rod 20 and the cutting edge of the hob 11, and improve the measurement accuracy.
[0059] According to an embodiment of the present invention, as Figure 1 shown, a sealing gasket 30 is provided at one end of the guiding channel 12; the sealing gasket 30 can achieve the seal between the cutter barrel 10 and the wear detection rod 20, and prevent the mud and slag inside the cutter barrel 10 from leaking through the guiding channel 12.
[0060] Furthermore, as Figure 1 shown, the sealing gasket 30 is provided on the outer side wall of the cutter barrel 10, and the wear detection rod 20 can pass through the sealing gasket 30 and extend into the guiding channel 12; the sealing gasket 30 is arranged on the outer side of the cutter barrel 10, which is convenient for installation and replacement.
[0061] According to an embodiment of the present invention, as Figure 2 shown, a switching valve 40 is provided on the outer side wall of the cutter barrel 10 corresponding to the guiding channel 12. The switching valve 40 is connected to the guiding channel 12 to realize the conduction or cut-off of the guiding channel 12, and the wear detection rod 20 can pass through the switching valve 40 and extend into the guiding channel 12.
[0062] Specifically, one end of the switch valve 40 is welded to the outer side wall of the cutter barrel 10. The switch valve 40 has a channel inside for the wear detection rod 20 to pass through. This channel is coaxially arranged with the guiding channel 12. At the same time, a valve controlled by a handle is provided on the channel in the switch valve 40. By rotating the handle, the opening and closing of the valve are realized, and thus the opening and closing of the switch valve 40 are controlled. When measurement is not carried out, the wear detection rod 20 is taken out from the guiding channel 12, and at the same time, the switch valve 40 is closed to ensure the sealing of the inner cavity of the cutter barrel 10 and avoid damage to the wear detection rod 20 when the hob 11 is operating.
[0063] According to an embodiment of the present invention, as Figure 2 , Figure 5 and Figure 6 shown, a sealing seat 50 is provided at one end of the switch valve 40. The wear detection rod 20 can pass through the sealing seat 50 and extend into the switch valve 40. The sealing seat 50 can achieve the sealing between the switch valve 40 and the wear detection rod 20, and avoid the leakage of the mud and slag in the cutter barrel 10 through the guiding channel 12 and the switch valve 40.
[0064] Furthermore, as Figure 5 and Figure 6 shown, an O-ring seal is provided inside the sealing seat 50.
[0065] According to an embodiment of the present invention, as Figure 7 shown, an abutting thin plate 22 capable of abutting against the cutting edge of the hob 11 is provided at one end of the wear detection rod 20 facing the hob 11. The thin plate structure at the end of the wear detection rod 20 can reduce the accumulation of muck at the end of the wear detection rod 20, so that the wear detection rod 20 can accurately abut against the cutting edge of the hob 11 and improve the accuracy of the measurement result.
[0066] Embodiment 2:
[0067] As Figure 3 and Figure 4 shown, the present invention also provides a method for detecting the wear of the hob of an atmospheric pressure cutter head, which uses the atmospheric pressure cutter head wear detection device described in Embodiment 1 for detection. The detection method includes:
[0068] Step S1: Install the unworn hob 11 on the cutter barrel 10;
[0069] Step S2: Insert the wear detection rod 20 with a length of L into the guiding channel 12 on the cutter barrel 10 and abut against the hob 11, and measure the length L0 of the wear detection rod 20 inserted into the cutter barrel 10 or the remaining length (L - L0) of the wear detection rod 20 outside the cutter barrel 10;
[0070] Step S3: Install the cutter barrel 10 on the cutter head for tunneling operation;
[0071] Step S4: After the operation for a period of time, extend the wear detection rod 20 into the guiding channel 12 on the cutter barrel 10 again and abut against the hob 11 online, and measure the length L1 of the wear detection rod 20 extending into the cutter barrel 10 or the remaining length (L - L1) of the wear detection rod 20 outside the cutter barrel 10.
[0072] Step S5: Obtain the wear amount of the hob 11 as (L1 - L0) according to the length difference between the two times before and after, and judge whether it is necessary to replace the hob 11 according to the wear amount.
[0073] For the wear detection method of the atmospheric pressure cutter head hob of the present utility model, under the condition that the atmospheric pressure cutter barrel 10 is pressurized, it is possible to directly measure the wear amount of the hob 11 without removing the cutter barrel 10 of the atmospheric pressure hob 11; the test method is fast and accurate, and can effectively solve the problem of time-consuming disassembly and assembly of the cutter barrel 10 caused by inaccurate wear detection of the hob 11 under dynamic conditions, minimize the time of ineffective disassembly and assembly of the atmospheric pressure cutter barrel 10 as much as possible, and improve the tunneling efficiency of the equipment.
[0074] First, it is necessary to measure the comparison standard, that is, steps S1 and S2. As Figure 3 shown, when the hob 11 is not worn, that is, before the hob 11 starts to work, obtain the length L0 of the wear detection rod 20 extending into the cutter barrel 10 or the remaining length (L - L0) of the wear detection rod 20 outside the cutter barrel 10 through the wear detection rod 20 and the guiding channel 12. For the convenience of measurement, the operator usually directly measures the remaining length (L - L0) of the wear detection rod 20 outside the cutter barrel 10.
[0075] Secondly, measure the worn hob 11, that is, steps S3 and S4. As Figure 4 shown, after the hob 11 works for a period of time, obtain the length L1 of the wear detection rod 20 extending into the cutter barrel 10 or the remaining length (L - L1) of the wear detection rod 20 outside the cutter barrel 10 again through the wear detection rod 20 and the guiding channel 12. For the convenience of measurement, the operator usually directly measures the remaining length (L - L1) of the wear detection rod 20 outside the cutter barrel 10.
[0076] Finally, calculate the length difference between the two measurements (L - L0) - (L - L1) = (L1 - L0). This length difference (L1 - L0) is the wear amount of the hob 11. If this wear amount exceeds the limit wear amount of the hob 11, it is necessary to replace the hob 11.
[0077] According to an embodiment of the present utility model, a water injection channel 21 extending along the length direction is provided in the wear detection rod 20; before detecting the worn hob 11, connect a water source to one end of the water injection channel 21 to wash the hob 11.
[0078] Before measuring the hob 11 after wear, the hob 11 is flushed through the water injection channel 21 to clean the muck in the cutter barrel 10, ensuring that there is no muck between the end of the wear detection rod 20 and the cutting edge of the hob 11, and improving the measurement accuracy.
[0079] The specific embodiments described above further elaborate on the purpose, technical solutions, and beneficial effects of the present utility model. It should be understood that the above are only specific embodiments of the present utility model and are not used to limit the protection scope of the present utility model. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present utility model shall be included within the protection scope of the present utility model.
Claims
1. A normal pressure cutter disc hob wear detection device, which is used to measure the wear of a hob (11) on a cutter barrel (10), characterized in that: The normal pressure cutter disc hob wear detection device comprises: A guide channel (12) is provided on the knife barrel (10), wherein the guide channel (12) extends in the radial direction of the roller cutter (11) and can connect the inner cavity of the knife barrel (10) with the external space; A wear detection rod (20) is movably arranged in the guide channel (12). The wear detection rod (20) is moved along the guide channel (12) toward the roller cutter (11) so that the end of the wear detection rod (20) abuts against the blade of the roller cutter (11). The wear amount of the roller cutter (11) is obtained according to the insertion length of the wear detection rod (20).
2. The normal pressure cutter disc hob wear detection device according to claim 1, characterized in that: The wear detection rod (20) is provided with a water injection channel (21) extending along its length direction, and one end of the water injection channel (21) can be connected to a water source to flush the roller cutter (11).
3. The normal pressure cutter disc hob wear detection device according to claim 1 or 2, characterized in that: A sealing gasket (30) is provided at one end of the guide channel (12).
4. The normal pressure cutter disc hob wear detection device according to claim 3, characterized in that: The sealing gasket (30) is arranged on the outer side wall of the knife cylinder (10), and the wear detection rod (20) can pass through the sealing gasket (30) and extend into the guide channel (12).
5. The normal pressure cutter disc hob wear detection device according to claim 1 or 2, characterized in that: A switch valve (40) is provided on the outer wall of the knife cylinder (10) corresponding to the guide channel (12); the switch valve (40) is connected to the guide channel (12) to realize the opening or closing of the guide channel (12); and the wear detection rod (20) can pass through the switch valve (40) and extend into the guide channel (12).
6. The normal pressure cutter disc hob wear detection device according to claim 5, characterized in that: A sealing seat (50) is provided at one end of the switch valve (40), and the wear detection rod (20) can pass through the sealing seat (50) and extend into the switch valve (40).
7. The normal pressure cutter disc hob wear detection device according to claim 6, characterized in that: An O-type sealing ring is arranged inside the sealing seat (50).
8. The normal pressure cutter disc hob wear detection device according to claim 1, characterized in that: An end of the wear detection rod (20) facing the roller cutter (11) is provided with a contact sheet (22) capable of contacting with the blade of the roller cutter (11).
Citation Information
Patent Citations
Normal pressure cutterhead hob rotating speed and temperature measurement device and wear extent measurement method
CN108181484A