Disclosure of utility model
The utility model aims to solve the problems and provides a grinder, grinding equipment and a grinding method for the inner sealing surface of a valve body.
In order to achieve the above purpose, the present utility model adopts the following technical scheme:
the grinder of the sealing surface in the valve body comprises a rotating shaft, and also comprises a self-adaptive lifting floating piece, wherein the upper end of the self-adaptive lifting floating piece is at least partially sleeved with the rotating shaft, and the self-adaptive lifting floating piece is fixedly connected with the rotating shaft in the circumferential direction and is distributed on a vertical shaft;
In the axial direction of the vertical shaft, the self-adaptive lifting floating piece freely lifts and floats relative to the rotating shaft and is provided with a spring which forces the self-adaptive lifting floating piece to always have a downward movement trend;
The lower end of the self-adaptive lifting floating piece is free, and a swinging type plane grinding head which rotates around a transverse axis perpendicular to the vertical axis is hinged to the lower end of the self-adaptive lifting floating piece;
During grinding, the grinding working plane of the swinging type plane grinding head is always matched with the inner annular grinding surface arranged in the valve body.
In the grinder of the inner sealing surface of the valve body, the lower end of the self-adaptive lifting floating piece is provided with an upper limiting surface, the upper end of the swinging type plane grinding head is provided with a lower limiting surface positioned below the upper limiting surface, and a swinging adjustment gap is reserved between the upper limiting surface and the lower limiting surface.
In the grinder for the inner sealing surface of the valve body, the swinging angle of the swinging type plane grinding head is an acute angle smaller than 5 degrees.
In the grinder of the inner sealing surface of the valve body, the lower end of the self-adaptive lifting floating piece is provided with a lower convex part, the upper end of the swinging type plane grinding head is internally provided with a groove for the lower convex part to be inserted into and in clearance fit with the lower convex part, and a clearance is reserved between the lower surface of the lower convex part and the bottom of the groove.
In the grinder for the inner sealing surface of the valve body, the upper end of the pendulum type plane grinding head is radially provided with a hinge shaft at least partially exposed in the groove, and the radial direction of the lower convex part is provided with a perforation for the hinge shaft to penetrate.
In the grinder of the inner sealing surface of the valve body, one end of the self-adaptive lifting floating piece, which is far away from the swinging type plane grinding head, is provided with a matching hole axially arranged along the vertical shaft, the lower end of the rotating shaft is inserted into the matching hole and is in sliding fit with the matching hole, and the spring is arranged between the bottom of the matching hole and the lower end surface of the rotating shaft.
In the grinder for the inner sealing surface of the valve body, a guide shaft is arranged in the radial direction of the self-adaptive lifting floating piece in a penetrating manner, and a guide hole which is in sliding fit with the guide shaft is arranged on the rotating shaft.
The utility model provides grinding equipment for an inner sealing surface of a valve body, which comprises a frame, wherein a plurality of valve body positioning jigs distributed in an annular mode are arranged on the frame, a lifting frame positioned above the valve body positioning jigs and a lifting driving mechanism for driving the lifting frame to move up and down are also arranged on the frame, a plurality of grinders corresponding to the inner sealing surface of the valve body one by one are arranged on the lifting frame, and the grinders of the inner sealing surface of the valve body synchronously rotate.
In the grinding device for the inner sealing surface of the valve body, the valve body positioning jig is fixed on the rotating disc.
The utility model provides a grinding method of a valve body inner sealing surface, which adopts the grinding equipment of the valve body inner sealing surface, and comprises the following steps:
S1, clamping, namely fixing a valve body with an inner annular grinding surface to be ground on a valve body positioning jig in an upright state;
s2, rapidly lifting, wherein the lifting frame is driven by lifting power to enable the grinder of the inner sealing surface of the valve body in a rotating state to enter the valve body in the S1;
S3, lifting slowly, wherein when the lifting frame in S2 drives the grinder of the inner sealing surface of the valve body to at least partially contact with the grinding inner annular grinding surface, the lifting speed of the lifting frame is reduced, so that the swinging type plane grinding head of the grinder of the inner sealing surface of the valve body rotates around a transverse axis perpendicular to a vertical axis relative to the self-adaptive lifting floating piece, and the grinding inner annular grinding surface is forced to coincide with the grinding working plane of the swinging type plane grinding head under the spring elasticity of the grinder of the inner sealing surface of the valve body;
S4, grinding, namely enabling the grinder of the inner sealing surface of the valve body in the S3 to rotate around the vertical shaft for a set time, and finishing the matched grinding of the inner annular grinding surface.
The utility model has the advantages that:
The swing type plane grinding head is hinged to the lower end of the self-adaptive lifting floating piece through the transverse shaft, so that the swing type plane grinding head can change in angle around the transverse shaft, the grinding layer can be matched with the annular grinding surface inside the valve body in an angle manner, the grinding layer is fully attached to the grinding surface under the continuous pressing action of the self-adaptive lifting floating piece, and the grinding is uniformly performed along with rotation.
Detailed Description
The following are specific embodiments of the utility model and the technical solutions of the utility model will be further described with reference to the accompanying drawings, but the utility model is not limited to these embodiments.
Example 1
1-6, The grinder of the inner sealing surface of the valve body comprises a rotating shaft 1, and is characterized by also comprising an adaptive lifting floating piece 2, wherein the upper end of the adaptive lifting floating piece is at least partially sleeved with the rotating shaft 1, and the adaptive lifting floating piece 2 is fixedly connected with the rotating shaft 1 in the circumferential direction and is distributed on a vertical shaft 3;
In the axial direction of the vertical shaft 3, the self-adaptive lifting floating piece 2 freely lifts and floats relative to the rotating shaft 1 and is provided with a spring 21 which forces the self-adaptive lifting floating piece 2 to always have a downward movement trend;
The lower end of the self-adaptive lifting floating piece 2 is free, and a swinging type plane grinding head 5 which rotates around a transverse shaft 4 vertical to the vertical shaft 3 is hinged to the lower end of the self-adaptive lifting floating piece 2;
During polishing, the polishing work plane 51 of the swing type planar polishing head 5 always coincides with the inner annular polishing surface 61 provided inside the valve body 6.
That is, the swinging type plane grinding head 5 is hinged to the lower end of the self-adaptive lifting floating member 2 through the transverse shaft 4, so that the swinging type plane grinding head 5 can change in angle around the transverse shaft 4, a grinding layer can be matched with 61 angles of the annular grinding surface inside the valve body 6, and the swinging type plane grinding head is fully attached to the grinding surface under the continuous pressing action of the self-adaptive lifting floating member 2, and uniformly grinding is performed along with rotation.
In this embodiment, the lower end of the self-adaptive lifting floating member 2 is provided with an upper limit surface 22, the upper end of the swinging type plane grinding bit 5 is provided with a lower limit surface 52 located below the upper limit surface 22, and a swinging adjustment gap is left between the upper limit surface 22 and the lower limit surface 52.
The gap between the upper limit surface 22 and the lower limit surface 52 is the maximum swing angle of the swing type plane grinding head 5, and when the swing type plane grinding head 5 rotates to the maximum swing angle, the upper limit surface 22 is abutted against and contacted with the upper limit surface 22.
In this embodiment, the swing angle of the swing type planar polishing head 5 is an acute angle smaller than 5 °.
In practical application, the inner annular grinding surface 61 inside the valve body 6 is adjusted according to the specific shape, but always kept within 45 ° because the downward pressure provided by the adaptive lifting floating member 2 will generate excessive horizontal component force when the swing angle of the swing type planar grinding head 5 is greater than 45 °, which will seriously affect the rotation stability of the adaptive lifting floating member 2.
Maximum swing angle values of 1 °,2 °, and 3 ° are generally used for small valve bodies, and maximum swing angle values of 10 °, 20 °, and 30 ° are used for large valve bodies.
In the present embodiment, the lower end of the adaptive lifting floating member 2 is provided with a lower protrusion 23, and the inside of the upper end of the rocking type planar polishing head 5 is provided with a groove 53 into which the lower protrusion 23 is inserted and which is in clearance fit with the lower protrusion 23, and a clearance is reserved between the lower surface of the lower protrusion 23 and the bottom of the groove 53.
The length of the lower protruding portion 23 is equal to the depth of the groove 53, so that a clearance reserved between the lower surface of the lower protruding portion 23 and the bottom of the groove 53 is equal to the distance between the upper limit surface 22 and the lower limit surface 52, when the upper limit surface 22 is contacted with the lower limit surface 52 to reach the maximum angle, the lower surface of the lower protruding portion 23 is also contacted with the bottom of the groove 53, and the inner contact point and the outer contact point can limit the swing angle of the swing type plane grinding head 5 together, so that the collision damage of a single contact point is avoided to influence the accuracy of angle limit.
At the same time, a gap is left between the lower convex portion 23 and the side wall of the groove 53, so that the swing type planar polishing head 5 has enough space to reach the limit of the swing angle when swinging. It can also be provided that when the limit of oscillation is reached, the lower projection 23 is also just in contact with the side wall of the recess 53, forming abutment limits of three points improving the reliability of the oscillation limit position.
Preferably, the upper end of the swing type planar polishing head 5 is radially provided with a hinge shaft 54 at least partially exposed in the groove 53, and the radial direction of the lower protruding portion 23 is provided with a through hole 24 through which the hinge shaft 54 passes.
The hinge shaft 54 is horizontally mounted in the groove 53 along the diameter of the swing type planar polishing head 5, and passes through the through-hole 24 also horizontally opened along the diameter. A radial through hole may be formed when the lower protrusion 23 and the groove 53 are engaged, and a bolt-shaped hinge shaft 54 may be inserted through the through hole and fixed to the nut.
In this embodiment, a fitting hole 25 axially provided along the vertical shaft 3 is provided at one end of the self-adaptive lifting floating member 2 away from the rocking type planar grinding bit 5, the lower end of the rotary shaft 1 is inserted into the fitting hole 25 and both are slidably fitted, and a spring 21 is provided between the bottom of the fitting hole 25 and the lower end surface of the rotary shaft 1.
The matching hole 25 is used as a guide rail of the rotating shaft 1, the rotating shaft 1 is limited to only stretch and retract in the axial direction, and the two are connected by the spring 21 in the axial direction, so that the two have continuous forces which are mutually separated in the axial direction, and the self-adaptive lifting floating piece 2 always has a downward movement trend under the condition that the rotating shaft 1 is fixed.
Preferably, a guide shaft 11 is inserted in the radial direction of the adaptive lifting/lowering float 2, and a guide hole 12 is provided in the rotary shaft 1 to slidably fit with the guide shaft 11.
The guide hole 12 is a kidney-shaped through hole formed in the vertical direction, the guide shaft 11 vertically slides in the guide hole 12, when the guide shaft 11 contacts with the lower cambered surface of the guide hole 12, the maximum depth of the rotating shaft 1 extending into the matching hole 25 is obtained, and when the guide shaft 11 contacts with the upper cambered surface of the guide hole 12, the maximum distance of the rotating shaft 1 exiting from the matching hole 25 is obtained.
Wherein the width of the guide hole 12 is matched with the diameter of the guide shaft 11, so that the self-adaptive lifting floating piece 2 can provide additional axial guiding capability when in telescopic motion, and the rotating power of the rotating shaft 1 is transmitted to the self-adaptive lifting floating piece 2.
Example 2
As shown in fig. 7 to 8, the grinder for the inner sealing surface of the valve body in embodiment 1 was applied to the grinding apparatus for the inner sealing surface of the valve body to improve the grinding effect of the valve body in each positioning jig.
The grinding equipment comprises a frame 7, a plurality of valve body positioning jigs 71 which are distributed in a ring shape are arranged on the frame 7, a lifting frame 72 which is positioned above the valve body positioning jigs 71 and a lifting driving mechanism 73 which drives the lifting frame 72 to move in a lifting manner are also arranged on the frame 7, a plurality of grinders which are in one-to-one correspondence with the valve body positioning jigs 71 are arranged on the lifting frame 72, and the grinders of the inner sealing surfaces of the valve bodies 6 synchronously rotate.
The valve body positioning jig 71 is cylindrical and consists of two hinged semi-cylinders, one semi-cylinder is fixed with the rotary disk 74, and the other semi-cylinder realizes the split and separation of the two semi-cylinders by virtue of a hinge, so that the valve body 6 is conveniently placed in the jig from the radial direction of the jig, and the longer valve body 6 is prevented from colliding with the grinder above.
The inner walls of the two semi-cylinders are respectively provided with an arc-shaped clamping block which can be detached and replaced, the arc-shaped clamping blocks are used for being contacted with the outer wall of the valve body 6, circumferential friction resistance is applied to the valve body 6, and the valve body 6 is kept in a stable state when contacting the rotating grinder. Meanwhile, a bolt type opening and closing locking piece is also arranged on the two half cylinders and used for ensuring the clamping of the arc-shaped clamping blocks to the valve body 6.
The lifting frame 72 and the lifting driving mechanism 73 are correspondingly provided with grinders on the mounting plates of the lifting frame 72 according to the mounting positions of the valve body positioning jig 71 below, and the lifting driving mechanism 73 drives the whole lifting frame 72 to move up and down so as to send the swinging type plane grinding head 5 into or out of the valve body 6.
The lifting driving mechanism 73 is driven by a lifting motor, the motor rotates a screw rod penetrating through the center of the mounting plate of the lifting frame 72, and under the cooperation of sliding guide rails around the mounting plate, the lifting of the mounting plate is realized by using the threads of the screw rod.
The grinder driving mechanism is arranged at the top of the frame 7 and is in transmission connection with the upper side of the rotating shaft 1, and a grinding motor is carried by a gear or a belt to enable each grinder to synchronously rotate.
Of course, multiple grinding motors can be used to drive each grinder respectively, so that each grinder has different rotation speeds, and different grinding effects of the valve body 6 on different stations can be achieved.
In the present embodiment, the valve body positioning jig 71 is fixed to the rotating disk 74.
The lower side of the frame 7 is also provided with a rotary disk 74, the rotary disk 74 is driven by a rotary motor to realize the rotation relative to the frame 7, and after the rotary disk 74 rotates, each valve body positioning jig 71 which is uniformly distributed on the rotary disk 74 can rotate to correspond to the grinder above, so that the valve body 6 can realize the work stations with different grinding effects through rotation.
One station is specially used for loading and unloading the valve body 6, so that a grinder is not correspondingly arranged above the station, and a more spacious space is provided for loading and unloading the valve body 6.
Example 3
A method of grinding an inner sealing surface of a valve body based on the grinding apparatus of an inner sealing surface of a valve body in embodiment 2, comprising the steps of:
S1, clamping, wherein the valve body 6 with the inner annular grinding surface 61 to be ground is fixed on the valve body positioning jig 71 in an upright state.
S2, rapidly lifting, wherein the lifting frame 72 is driven by lifting power to enable the grinder of the inner sealing surface of the valve body in a rotating state to enter the valve body 6 in S1;
S3, lifting slowly, when the lifting frame 72 in S2 drives the grinder of the inner sealing surface of the valve body to at least partially contact the grinding inner annular grinding surface 61, reducing the lifting speed of the lifting frame 72, so that the swinging type plane grinding head 5 of the grinder of the inner sealing surface of the valve body rotates around the transverse shaft 4 perpendicular to the vertical shaft 3 relative to the self-adaptive lifting floating piece 2, and the grinding inner annular grinding surface 61 is forced to coincide with the grinding working plane 51 of the swinging type plane grinding head 5 under the elastic action of the spring 21 of the grinder of the inner sealing surface of the valve body;
S4, grinding, namely rotating the grinder of the inner sealing surface of the valve body in S3 around the vertical shaft 3 for a set time, and finishing the matched grinding of the inner annular grinding surface 61.
The specific embodiments described herein are offered by way of example only to illustrate the spirit of the utility model. Those skilled in the art may make various modifications or additions to the described embodiments or substitutions thereof without departing from the spirit of the utility model or exceeding the scope of the utility model as defined in the accompanying claims.