Valve seat grinding tool

Abstract

The utility model provides a valve seat grinding tool, which belongs to the technical field of machine manufacturing and comprises a fixing seat, a pressing plate and a grinding wheel. A valve seat to be machined is suitable for being obliquely arranged above the fixed seat, so that the sealing surface of the valve seat is kept horizontal; the pressing plate is detachably connected to the fixing base, and part of the pressing plate abuts against the valve seat so that the valve seat can be fixed to the fixing base. And the grinding wheel is arranged above the fixed seat and is suitable for being in contact with the sealing surface of the valve seat. During use, the pressing plate abuts against the valve seat to be machined, the valve seat is obliquely fixed to the fixing seat, so that the sealing face of the valve seat is kept horizontal, the sealing face makes contact with the grinding wheel conveniently, grinding is facilitated, the sealing face of the valve seat is ground through automatic operation of the grinding wheel, and the grinding efficiency is improved. The valve seat grinding tool solves the problem that in the prior art, due to the fact that a sealing face of a valve seat is subjected to pure manual or semi-automatic operation through a diamond grinding wheel, grinding efficiency is low.

Description

Technical Field

[0001] The utility model relates to the technical field of mechanical manufacturing, in particular to a valve seat grinding tool. Background Art

[0002] As ball valves are increasingly used in special working conditions such as coal chemical industry, high temperature, strong corrosion, etc., the requirements for the ball valve seat sealing surface are getting higher and higher. Ordinary sealing materials can no longer meet the requirements of these special working conditions. To address this problem, the ball valve sealing surface needs to be hardened by spraying WC or other methods. At the same time, the hardened ball valve seat sealing surface has the disadvantage of being difficult to process.

[0003] Currently, the grinding process is mainly done manually or semi-automatically using diamond abrasives, which requires high skills of operators. In addition, it takes 4 to 8 hours to process each set of valve seats, resulting in low processing efficiency. Utility Model Content

[0004] Therefore, the technical problem to be solved by the utility model is to overcome the problem of low grinding efficiency caused by pure manual / semi-automatic grinding of the sealing surface of the valve seat by diamond grinding sand in the prior art, thereby providing a valve seat grinding tool.

[0005] In order to solve the above technical problems, the utility model provides a valve seat grinding tool, comprising:

[0006] A fixed seat, the upper portion of which is suitable for tilting the valve seat to be processed so that the sealing surface of the valve seat remains horizontal;

[0007] A pressing plate, detachably connected to the fixing seat, wherein a portion of the pressing plate presses against the valve seat to fix the valve seat on the fixing seat;

[0008] A grinding wheel is arranged above the fixing seat, and the grinding wheel is suitable for contacting with the sealing surface of the valve seat.

[0009] Optionally, a fixing hole is provided on the pressing plate, a fastener is locked into the fixing hole, and the fastener passes through the pressing plate and is connected to the fixing seat.

[0010] Optionally, a positioning hole is further provided on the pressing plate, a positioning bolt is inserted into the positioning hole, and the positioning bolt passes through the pressing plate and is connected to the fixing seat.

[0011] Optionally, an elastic member is sleeved on the fastener, two ends of the elastic member are in contact with the pressing plate and the fixing seat, and the elastic member has an elastic force for pushing the pressing plate away from the fixing seat.

[0012] Optionally, a first rotating motor is disposed on the fixing seat, a driving shaft of the first rotating motor is coaxially arranged with a rotating shaft of the fixing seat, and the fixing seat is driven to rotate by the first rotating motor.

[0013] Optionally, a first drive motor is further provided, wherein the first drive motor is connected to the first rotating motor, and the fixing seat is driven to reciprocate in a horizontal direction by the first drive motor.

[0014] Optionally, a second rotating motor is provided on the grinding wheel, the grinding wheel is connected to a driving shaft of the second rotating motor, and the grinding wheel is driven to rotate by the second rotating motor.

[0015] Optionally, a second drive motor is further provided, and the second drive motor is connected to the second rotating motor, and the grinding wheel is driven to move in a stepping manner in a vertical direction by the second drive motor.

[0016] Optionally, the fixing seat comprises:

[0017] A fixed body, wherein the fixed body has a first reference surface and a second reference surface which are in contact with the valve seat so that the valve seat is inclined, and the fixed body is an annular structure, and a positioning groove is provided at the center of the annular structure;

[0018] The support frame is detachably arranged below the fixed body, the support frame is provided with a positioning boss, the positioning groove and the positioning boss are snap-fitted, and the support frame is used to support the fixed body.

[0019] Optionally, a shock-absorbing member is provided on the second reference surface of the fixed body so that the valve seat and the second reference surface are in elastic contact.

[0020] The technical solution of the utility model has the following advantages:

[0021] 1. The valve seat grinding tool provided by the utility model has a portion of a pressure plate pressed against the valve seat to be processed, and the valve seat is fixed on the fixed seat at an angle, so that the sealing surface of the valve seat remains horizontal, and the sealing surface is convenient for contacting with the grinding wheel above the fixed seat for grinding, so that the sealing surface of the valve seat is automatically ground by the grinding wheel, thereby improving the grinding efficiency. The valve seat grinding tool provided by the utility model solves the problem of low grinding efficiency caused by the pure manual / semi-automatic operation of the sealing surface of the valve seat by the diamond grinding wheel in the prior art.

[0022] 2. The valve seat grinding tool provided by the utility model has a fastener locked into the fixing hole to enable the pressure plate and the fixing seat to be detachably connected. When the fastener is locked, part of the pressure plate presses against the valve seat. When the fastener is loosened, the pressure plate releases the pressure on the valve seat, which facilitates the fixing and removal of the valve seat.

[0023] 3. In the valve seat grinding tool provided by the utility model, the positioning bolt passes through the positioning hole on the pressure plate and is connected to the fixed seat, which can prevent the pressure plate from rotating when no force is applied.

[0024] 4. The valve seat grinding tool provided by the utility model, when the fastener is loosened, the elastic force of the elastic member pushes the pressure plate to move in a direction away from the fixed seat, so that the pressure plate releases the pressure on the valve seat.

[0025] 5. In the valve seat grinding tool provided by the utility model, the first rotary motor drives the fixed seat to rotate around the Z axis, driving the sealing surface of the valve seat to rotate, so that the grinding wheel can contact the entire sealing surface.

[0026] 6. In the valve seat grinding tool provided by the utility model, the first drive motor drives the fixed seat to reciprocate in the horizontal direction, driving the sealing surface of the valve seat to move in the horizontal direction, so that the grinding wheel can contact various positions of the sealing surface in the horizontal direction.

[0027] 7. In the valve seat grinding tool provided by the utility model, the second rotary motor drives the grinding wheel to rotate around the driving shaft, and the high-speed rotation of the grinding wheel can realize the grinding of the valve seat sealing surface.

[0028] 8. The valve seat grinding tool provided by the utility model drives the grinding wheel to move in a vertical stepping manner through the second drive motor. When grinding is required, the second drive motor drives the grinding wheel to move in a direction close to the valve seat and presses the grinding wheel against the sealing surface of the valve seat. By linking the stepping movement of the grinding wheel in the vertical direction with the horizontal reciprocating movement of the valve seat with the support plate, the sealing surface of the valve seat can be ground to a required thickness and roundness. When grinding is completed, the second drive motor drives the grinding wheel to move in a direction away from the valve seat.

[0029] 9. The valve seat grinding tool provided by the utility model installs the fixed body on the support frame through the clamping fit of the positioning groove and the positioning boss, and the fixed body of different sizes can be replaced according to the model of the valve seat; the fixed body is arranged as an annular structure, which can make the first reference surface and the second reference surface of the fixed body abut against the valve seat, thereby ensuring the stability of the valve seat during the grinding process.

[0030] 10. The valve seat grinding tool provided by the utility model and the shock absorbing member can make the valve seat and the second reference surface elastically contact, thereby achieving the purpose of self-centering of the valve seat in the W-axis direction. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0032] Figure 1 A schematic diagram of an implementation of a valve seat grinding tool provided in an embodiment of the utility model;

[0033] Figure 2 for Figure 1 A magnified schematic diagram of part A;

[0034] Figure 3 for Figure 1 Schematic diagram of the enlarged portion B.

[0035] Description of reference numerals:

[0036] 1. Fixed seat; 2. Valve seat; 3. Pressing plate; 4. Grinding wheel; 5. Fastener; 6. Positioning bolt; 7. Elastic member; 8. Driving shaft; 9. Fixed body; 10. First reference plane; 11. Second reference plane; 12. Positioning groove; 13. Support plate frame; 14. Positioning boss; 15. Shock absorber; 16. Groove. DETAILED DESCRIPTION

[0037] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0038] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0039] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0040] In addition, the technical features involved in the different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0041] This embodiment provides a valve seat grinding tool that can automatically operate through a diamond grinding wheel and is used to grind the sealing surface of the valve seat 2.

[0042] like Figure 1 As shown, a specific implementation of a valve seat grinding tool provided in this embodiment includes: a fixed seat 1, a pressure plate 3 and a grinding wheel 4; the upper part of the fixed seat 1 is suitable for tilting the valve seat 2 to be processed so that the sealing surface of the valve seat 2 remains horizontal; the pressure plate 3 is detachably connected to the fixed seat 1, and part of the pressure plate 3 is pressed against the valve seat 2 to fix the valve seat 2 on the fixed seat 1; the grinding wheel 4 is arranged above the fixed seat 1, and the grinding wheel 4 is suitable for contacting the sealing surface of the valve seat 2.

[0043] When in use, part of the pressing plate 3 is pressed against the valve seat 2 to be processed, and the valve seat 2 is fixed on the fixed seat 1 at an angle, so that the sealing surface of the valve seat 2 remains horizontal, and the sealing surface is conveniently contacted with the grinding wheel 4 above the fixed seat 1 for grinding, so that the sealing surface of the valve seat 2 is automatically ground by the grinding wheel 4, thereby improving the grinding efficiency. The valve seat grinding tool provided in this embodiment solves the problem of low grinding efficiency caused by pure manual / semi-automatic operation of the sealing surface of the valve seat 2 by the diamond grinding wheel in the prior art.

[0044] like Figure 1 , Figure 2As shown, in the valve seat grinding tool provided in this embodiment, a fixing hole is provided on the pressure plate 3, and a fastener 5 is locked in the fixing hole. The fastener 5 passes through the pressure plate 3 and is connected to the fixed seat 1. The fastener 5 is locked in the fixing hole so that the pressure plate 3 and the fixed seat 1 can be detachably connected. When the fastener 5 is locked, part of the pressure plate 3 presses against the valve seat 2. When the fastener 5 is loosened, the pressure plate 3 releases the pressure on the valve seat 2, which facilitates the fixation and removal of the valve seat 2. In addition, as an alternative embodiment, the fastener 5 and the fixing hole can be omitted, and a buckle is provided on the fixed seat 1, and the pressure plate 3 is connected to the buckle by a snap connection, or other structures that can press the pressure plate 3 against the valve seat 2 for fixation.

[0045] like Figure 1 , Figure 2 As shown, in the valve seat grinding tool provided in this embodiment, a positioning hole is also provided on the pressing plate 3, and a positioning bolt 6 is inserted into the positioning hole, and the positioning bolt 6 passes through the pressing plate 3 and is connected to the fixing seat 1. The positioning bolt 6 passes through the positioning hole on the pressing plate 3 and is connected to the fixing seat 1, which can prevent the pressing plate 3 from rotating when no force is applied. In addition, as an alternative embodiment, the positioning bolt 6 can be omitted, and a protrusion is provided on the fixing seat 1, and the protrusion is engaged with the positioning hole.

[0046] like Figure 1 , Figure 2 As shown, in the valve seat grinding tool provided in this embodiment, an elastic member 7 is sleeved on the fastener 5, and the two ends of the elastic member 7 are in contact with the pressure plate 3 and the fixed seat 1, and the elastic member 7 has an elastic force that pushes the pressure plate 3 away from the fixed seat 1. When the fastener 5 is loosened, the elastic force of the elastic member 7 pushes the pressure plate 3 to move away from the fixed seat 1, so that the pressure plate 3 releases the pressure on the valve seat 2. In addition, as an alternative embodiment, the elastic member 7 can also be omitted, and when the fastener 5 is loosened, the pressure on the valve seat 2 is released by manually lifting the pressure plate 3.

[0047] like Figure 1 As shown, in the valve seat grinding tool provided in this embodiment, a first rotating motor is arranged on the fixed seat 1, and the driving shaft 8 of the first rotating motor is coaxially arranged with the rotating shaft of the fixed seat 1, and the fixed seat 1 is driven to rotate by the first rotating motor. The first rotating motor drives the fixed seat 1 to rotate around the Z-axis direction, driving the sealing surface of the valve seat 2 to rotate, so that the grinding wheel 4 can contact the entire sealing surface. In addition, as an alternative embodiment, the first rotating motor can be omitted, and the fixed seat 1 can also be rotated manually.

[0048] It is necessary to add that, if Figure 1 As shown, the Z-axis direction is a direction perpendicular to the inclined surface of the valve seat 2 .

[0049] like Figure 1 As shown, in the valve seat grinding tool provided in this embodiment, a first drive motor is also provided, and the first drive motor is connected to the first rotating motor, and the fixed seat 1 is driven to reciprocate in the horizontal direction by the first drive motor. The first drive motor drives the fixed seat 1 to reciprocate in the horizontal direction, drives the sealing surface of the valve seat 2 to move in the horizontal direction, and enables the grinding wheel 4 to contact various positions of the sealing surface in the horizontal direction. In addition, as an alternative embodiment, the first drive motor can be omitted, and the fixed seat 1 can also be manually reciprocated in the horizontal direction.

[0050] like Figure 1 As shown, in the valve seat grinding tool provided in this embodiment, a second rotary motor is provided on the grinding wheel 4, and the grinding wheel 4 is connected to the driving shaft 8 of the second rotary motor, and the grinding wheel 4 is driven to rotate by the second rotary motor. The second rotary motor drives the grinding wheel 4 to rotate around the driving shaft 8, and the high-speed rotation of the grinding wheel 4 can achieve grinding of the sealing surface of the valve seat 2. In addition, as an alternative embodiment, the second rotary motor can be omitted, and the grinding wheel 4 can be rotated manually.

[0051] like Figure 1 As shown, in the valve seat grinding tool provided in this embodiment, a second drive motor is also provided, and the second drive motor is connected to the second rotating motor, and the grinding wheel 4 is driven to move in a stepping manner in the vertical direction by the second drive motor. The grinding wheel 4 is driven to move in a stepping manner in the vertical direction by the second drive motor. When grinding is required, the second drive motor drives the grinding wheel 4 to move in a direction close to the valve seat 2, and the grinding wheel 4 is pressed against the sealing surface of the valve seat 2. By linking the stepping movement of the grinding wheel 4 in the vertical direction with the horizontal reciprocating movement of the support plate frame 13 with the valve seat 2, the sealing surface of the valve seat 2 can be ground to the required thickness and roundness; when the grinding is completed, the second drive motor drives the grinding wheel 4 to move in a direction away from the valve seat 2. Specifically, there is a linkage relationship between the operation of the first drive motor and the second drive motor. In addition, as an alternative embodiment, the second drive motor can be omitted, and the grinding wheel 4 can be moved in the vertical direction manually.

[0052] like Figure 1 , Figure 3As shown, in the valve seat grinding tool provided in this embodiment, the fixed seat 1 includes: a fixed body 9 and a support plate frame 13, the fixed body 9 has a first reference surface 10 and a second reference surface 11 that are in contact with the valve seat 2, so that the valve seat 2 is tilted, the fixed body 9 is an annular structure, and a positioning groove 12 is provided at the center of the annular structure; the support plate frame 13 is detachably arranged below the fixed body 9, and a positioning boss 14 is provided on the support plate frame 13, and the positioning groove 12 and the positioning boss 14 are snap-fitted, and the support plate frame 13 is used to support the fixed body 9. Through the snap-fitting of the positioning groove 12 and the positioning boss 14, the fixed body 9 is installed on the support plate frame 13, and the fixed body 9 of different sizes can be replaced according to the model of the valve seat 2; the fixed body 9 is set as an annular structure, which can make the first reference surface 10 and the second reference surface 11 of the fixed body 9 in contact with the valve seat 2, thereby ensuring the stability of the valve seat 2 during the grinding process. Specifically, the support frame 13 is tilted so that the sealing surface of the valve seat 2 and the part in contact with the grinding wheel 4 remain horizontal; after the fixed body 9 is installed on the support frame 13, it is fixed with bolt fasteners 5; when the support frame 13 rotates around the Z-axis direction, the first reference surface 10 and the second reference surface 11 of the fixed body 9 are corrected so that the runout of the first reference surface 10 and the second reference surface 11 is within 0.01mm. In addition, as an alternative embodiment, the fixed seat 1 can also be made in one piece.

[0053] like Figure 1 , Figure 3 As shown, in the valve seat grinding tool provided in this embodiment, a shock absorber 15 is provided on the second reference surface 11 of the fixed body 9 to enable the valve seat 2 to be in elastic contact with the second reference surface 11. The shock absorber 15 can enable the valve seat 2 to be in elastic contact with the second reference surface 11, thereby achieving the self-centering purpose of the valve seat 2 in the W-axis direction. Specifically, a groove 16 is provided on the valve seat 2, and the groove 16 is used to accommodate the shock absorber 15, and the shock absorber 15 is an O-ring; the angle between the first reference surface 10 and the second reference surface 11 is a chamfered structure, which can prevent the shock absorber 15 from being damaged by sharp corners during installation. In addition, as an alternative embodiment, the groove 16 can also be provided on the second reference surface 11.

[0054] It is necessary to add that, if Figure 1 As shown, the W-axis direction is the tilting direction of the valve seat 2 .

[0055] How to use

[0056] like Figure 1As shown, the valve seat grinding tool provided in this embodiment, when in use, locks the fastener 5 so that part of the pressure plate 3 presses against the valve seat 2, and the valve seat 2 is fixed on the fixed body 9 so that the sealing surface of the valve seat 2 and the part in contact with the grinding wheel 4 remain horizontal, and the stepping motion of the grinding wheel 4 and the horizontal reciprocating motion of the valve seat 2 driven by the support frame 13 are linked, and at the same time, the support frame 13 drives the valve seat 2 to rotate around the Z axis, and the high-speed rotating grinding wheel 4 grinds the sealing surface of the valve seat 2 to the stated thickness and roundness.

[0057] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived from these are still within the scope of protection of the present utility model.

Claims

1. A valve seat grinding tool, characterized in that: include: A fixed seat (1) having a valve seat (2) to be processed arranged at an angle on the upper side thereof so that the sealing surface of the valve seat (2) remains horizontal; A pressing plate (3) is detachably connected to the fixing seat (1), and a portion of the pressing plate (3) is pressed against the valve seat (2) to fix the valve seat (2) on the fixing seat (1); A grinding wheel (4) is arranged above the fixed seat (1), and the grinding wheel (4) is suitable for contacting the sealing surface of the valve seat (2).

2. The valve seat grinding tool according to claim 1, characterized in that: The pressing plate (3) is provided with a fixing hole, a fastener (5) is locked into the fixing hole, and the fastener (5) passes through the pressing plate (3) and is connected to the fixing seat (1).

3. The valve seat grinding tool according to claim 2, characterized in that: The pressing plate (3) is also provided with a positioning hole, in which a positioning bolt (6) is inserted, and the positioning bolt (6) passes through the pressing plate (3) and is connected to the fixing seat (1).

4. The valve seat grinding tool according to claim 2, characterized in that: An elastic member (7) is sleeved on the fastener (5), and two ends of the elastic member (7) are in contact with the pressing plate (3) and the fixing seat (1). The elastic member (7) has an elastic force that pushes the pressing plate (3) away from the fixing seat (1).

5. The valve seat grinding tool according to claim 1, characterized in that: A first rotating motor is arranged on the fixing seat (1); a driving shaft (8) of the first rotating motor is arranged coaxially with a rotating shaft of the fixing seat (1); and the fixing seat (1) is driven to rotate by the first rotating motor.

6. The valve seat grinding tool according to claim 5, characterized in that: A first drive motor is also provided, the first drive motor is connected to the first rotating motor, and the fixing seat (1) is driven to reciprocate in a horizontal direction by the first drive motor.

7. The valve seat grinding tool according to claim 6, characterized in that: The grinding wheel (4) is provided with a second rotating motor, and the grinding wheel (4) is connected to a driving shaft (8) of the second rotating motor, so that the grinding wheel (4) is driven to rotate by the second rotating motor.

8. The valve seat grinding tool according to claim 7, characterized in that: A second drive motor is also provided, the second drive motor is connected to the second rotating motor, and the second drive motor drives the grinding wheel (4) to move in a stepwise manner in a vertical direction.

9. The valve seat grinding tool according to any one of claims 1 to 8, characterized in that: The fixing seat (1) comprises: A fixed body (9), the fixed body (9) having a first reference surface (10) and a second reference surface (11) abutting against the valve seat (2) so as to allow the valve seat (2) to be arranged at an angle, the fixed body (9) being an annular structure, a positioning groove (12) being arranged at the center of the annular structure; A support frame (13) is detachably arranged below the fixed body (9); a positioning boss (14) is arranged on the support frame (13); the positioning groove (12) and the positioning boss (14) are snap-fitted together; and the support frame (13) is used to support the fixed body (9).

10. The valve seat grinding tool according to claim 9, characterized in that: A shock absorbing member (15) is provided on the second reference surface (11) of the fixed body (9) so as to enable the valve seat (2) to be in elastic contact with the second reference surface (11).

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