Precise grinding device for inner cavity of valve

Abstract

The invention relates to the technical field of grinding devices, and discloses a valve inner cavity precise grinding device which comprises a base, a grinding wheel, a grinding wheel and a grinding wheel. The supporting frame is fixedly connected to the top of the base and used for fixing parts; the rotating disc is arranged on the inner wall of the base; and the output end of the rotating disc is connected with the three-jaw calipers. According to the precise grinding device for the inner cavity of the valve, by arranging the grinding mechanism, synchronous advancing and retreating and precise interval control of the grinding head are achieved, and self-adaptive grinding of valves of different sizes is guaranteed; meanwhile, the rotating disc and the three-jaw calipers drive the valve to rotate, uniform machining of the surface of the inner cavity is achieved, and polishing dead corners and uneven surfaces are avoided; the two polishing heads are close to the two opposite sides of the inner cavity of the valve at the same time, symmetric distribution of polishing force is achieved, radial pressure borne by the valve is balanced, stress deviation and deformation caused by single-side polishing are avoided, and polishing stability and smoothness are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of polishing devices, in particular to a valve inner cavity precision polishing device. BACKGROUND

[0002] Valve inner cavity polishing processing is a precision machining process used to improve the smoothness of the inner wall of the valve and the sealing performance. The main purpose is to polish and polish the inner cavity surface of the valve through mechanical or automatic equipment, remove burrs, surface defects or unevenness, ensure the smoothness and uniformity of the inner wall, and thus improve the sealing performance, corrosion resistance and fluid control efficiency of the valve.

[0003] In the valve inner cavity polishing processing process, the existing technology generally adopts a single-sided polishing head design, that is, only a single polishing head is used to apply radial polishing pressure to the single-sided surface of the inner cavity, and the other side lacks a corresponding counter-support or force balance structure. This design inevitably leads to uneven distribution of radial force on the cross section of the valve inner cavity. Since the contact pressure between the polishing head and the inner cavity surface is completely provided by one side, according to the principle of mechanical balance, the single-sided radial force will form an additional torque around the axis of the valve, especially when the valve is a thin-walled structure, its own rigidity is not enough to resist the torque, and then elastic deformation of the workpiece along the radial direction is caused; if the polishing force exceeds the material yield strength, irreversible plastic deformation will occur, directly leading to an increase in the roundness error of the inner cavity, and a serious deviation from the design requirement of the shape and position tolerance range. The increase in roundness error makes the sealing surface and valve seat unable to form uniform fitting during valve assembly, the fitting clearance increases, resulting in poor product consistency, low pass rate, and difficulty in meeting the stringent requirements of high-end valves for inner cavity surface quality and sealing performance. SUMMARY

[0004] (I) Technical problems solved In view of the shortcomings of the prior art, the present application provides a valve inner cavity precision polishing device, which solves the problem that the existing valve inner cavity polishing technology adopts a single-sided polishing head design, resulting in uneven radial force, easy to cause elastic or plastic deformation of the thin-walled valve, resulting in an increase in roundness error, poor sealing performance and poor product consistency, and difficulty in meeting the high-precision requirements of high-end valves.

[0005] (II) Technical solutions To achieve the above-mentioned purpose, the present application provides the following technical solutions: The utility model provides a valve inner chamber precision polishing device, including: base, set up on plane, for supporting whole device structure, support frame, support frame fixedly connected at the top of base for fixing spare parts, rotary disc, the inner wall of base is provided with rotary disc, three jaw calipers, the output end of rotary disc is connected with three jaw calipers, and rotary disc is used for electric drive three jaw calipers rotation, and three jaw calipers are used for clamping valve, polishing mechanism, polishing mechanism sets up on support frame for polishing valve inner chamber, and polishing mechanism includes: support frame, the top of support frame is equipped with strip slide groove, the lateral wall of support frame is rotatably connected with two -way screw rod, two strip blocks are symmetrically screwed on two -way screw rod, the top of strip block is provided with sliding connector, sliding connector is connected with strip slide groove, the bottom of strip block is fixedly connected with drive motor, and the bottom of drive motor is connected with polishing head, adjusting mechanism, adjusting mechanism sets up on two -way screw rod for accurately adjusting the force of polishing head and the inner chamber of valve, reciprocating mechanism, reciprocating mechanism sets up on support frame for driving whole polishing mechanism reciprocating up and down.

[0006] Preferably, the strip slide groove is provided with three, and the sliding connector is five cylinders, two sliding connectors are penetrated in the strip slide groove of the front and back sides, and one sliding connector is penetrated in the middle strip slide groove.

[0007] Preferably, one end of the two-way screw rod is provided with a rotating handle disc for facilitating rotation of the two-way screw rod.

[0008] Preferably, the adjusting mechanism includes a hollow disc, the other end of the two-way screw rod is rotatably connected with the hollow disc, the side wall of the hollow disc is fixedly connected with a hollow square block, the outer wall of the hollow square block is provided with an observation window, one side of the observation window on the hollow square block is provided with a scale, the top of the hollow square block is threadedly connected with an adjusting screw rod, the adjusting screw rod is rotatably connected with a first square block, the side of the first square block away from the adjusting screw rod is connected with a return spring, one end of the return spring away from the first square block is fixedly connected with a second square block, the second square block and the first square block are slidably connected with the inner wall of the hollow square block, the bottom of the second square block is fixedly connected with a spherical block, the end of the two-way screw rod is fixedly connected with a gear piece, the two sides of the gear piece are fixedly connected with a ring block, the outer wall of the ring block is rotatably connected with the inner wall of the hollow disc, and the spherical block abuts against the gear piece.

[0009] Preferably, the reciprocating mechanism comprises a rotary motor fixedly connected to the support frame, an output end of the rotary motor being fixedly connected with a reciprocating screw, a top of the support frame being fixedly connected with a connecting lug, an inner wall of the connecting lug being penetrated by the reciprocating screw, and the inner wall of the connecting lug being threadedly connected with the reciprocating screw, an outer wall of the support frame being fixedly connected with a sliding plate, and the sliding plate being slidingly connected with the support frame.

[0010] Preferably, a portion of the support frame opposite to the connecting lug is slotted to facilitate relative movement of the reciprocating screw and the support frame.

[0011] Preferably, a damping pad layer is arranged between the rotary disc and the three-jawed clamp to reduce the influence of rotary vibration on polishing precision.

[0012] Preferably, the polishing head is of a replaceable structure to facilitate adjustment of a polishing contact surface according to different valve shapes.

[0013] Preferably, a limit travel block is arranged between the support frame and the sliding plate to limit the maximum polishing travel.

[0014] (Three) beneficial effects Compared with the prior art, the present application provides a valve inner cavity precision polishing device with the following beneficial effects: 1. The valve inner cavity precision polishing device utilizes a polishing mechanism to drive two strip blocks to move symmetrically along a strip sliding groove through a bidirectional screw symmetric adjustment structure, to realize synchronous advance and retreat and interval accurate control of the polishing head, to ensure self-adaptive polishing of different size valves and reduce manual adjustment errors. Meanwhile, the valve is rotated by a rotary disc and a three-jawed clamp to realize uniform processing of the inner cavity surface, to avoid dead angles and uneven surfaces. The strip blocks are slidingly matched with the strip sliding groove through sliding connectors, to make the polishing head keep stable linear motion during adjustment, to prevent deviation or shaking and to improve polishing precision. Two polishing heads simultaneously approach the opposite sides of the valve inner cavity to realize symmetric distribution of polishing force, to balance the radial pressure borne by the valve, to avoid force deviation and deformation caused by unilateral polishing, and to improve polishing stability and smoothness.

[0015] 2. The valve inner cavity precision polishing device utilizes an adjustment mechanism to drive a bidirectional screw to rotate and adjust the position of the polishing head through hollow disc, hollow square block and ball block transmitting motion to gear members. When the polishing reaction force is too large, the ball block slides along the helical gear surface of the gear members and compresses the return spring to realize force feedback and limit protection, to prevent the polishing head from being excessively pressed against the valve inner cavity to cause damage. The return spring pre-tightening force is changed through an adjustment screw to regulate the contact force of the ball block, so that the polishing pressure can be flexibly adjusted according to the valve material. An operator can directly read the pressure adjustment state through the observation window and the scale table to ensure that the polishing force of the valve inner cavity is uniform, controllable, high in processing precision and safe and reliable.

[0016] 3、The valve inner cavity precision polishing device is provided with a reciprocating mechanism, a rotating motor drives a reciprocating screw rod to rotate, the connecting lug block and the support frame are driven to move linearly along the screw direction, the polishing head has axial reciprocating stroke while rotating and polishing, the valve inner wall is polished more comprehensively and uniformly, the surface unevenness caused by single-point or single-zone polishing is avoided, and the polishing efficiency and the overall smoothness of the valve inner cavity are improved; the sliding plate on the outer wall of the support frame is slidingly connected with the support frame, plays a guiding and limiting role in the reciprocating process, limits the movement path to a stable straight line, prevents inclination or shaking, and ensures stable and reliable polishing. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is a structural schematic view of the whole application; Figure 2 It is a structural schematic view of the rotating disc; Figure 3 It is a structural schematic view of the reciprocating mechanism; Figure 4 It is a structural schematic view of the strip-shaped sliding groove; Figure 5 It is a structural schematic view of the sliding connecting piece; Figure 6 It is a structural schematic view of the hollow square block; Figure 7 It is a structural schematic view of the hollow disc section.

[0018] In the figure: 1, base; 2, support frame; 3, polishing mechanism; 31, support frame; 32, strip-shaped sliding groove; 33, bidirectional screw rod; 34, strip-shaped block; 35, driving motor; 36, polishing head; 37, sliding connecting piece; 4, adjusting mechanism; 41, hollow disc; 42, hollow square block; 43, observation window; 44, scale; 45, adjusting screw rod; 46, first square block; 47, return spring; 48, second square block; 49, spherical block; 410, gear piece; 411, ring-shaped block; 5, reciprocating mechanism; 51, rotating motor; 52, reciprocating screw rod; 53, connecting lug block; 54, sliding plate; 6, rotating disc; 7, three-jaw caliper. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the application will be clearly and completely described below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are only part of the embodiments of the application, rather than all the embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those skilled in the art without creative work fall within the protection scope of the application.

[0020] See Figures 1-7The utility model provides a valve inner chamber precision polishing device, it includes: base 1 is arranged on the plane for supporting the whole device structure, guarantees the overall stability, support frame 2 is fixedly connected at the top of base 1 for fixing spare parts, rotary disc 6 is set up in the inner wall of base 1, three jaw calipers 7, rotary disc 6's output is connected with three jaw calipers 7, and rotary disc 6 is used for electric drive three jaw calipers 7 rotation, and three jaw calipers 7 are used for clamping valve, and three jaw calipers 7 are driven by rotary disc 6 and realize synchronous rotation, are used for clamping and drive valve rotation, so that valve inner chamber keeps uniform stress and continuous rotation in the polishing process, polishing mechanism 3, polishing mechanism 3 sets up on support frame 2, is used for polishing to valve inner chamber, and polishing mechanism 3 includes: support frame 31, the top of support frame 31 is equipped with strip slide groove 32, the lateral wall of support frame 31 is rotatably connected with two -way screw rod 33, two strip blocks 34 are symmetrically screwed on two -way screw rod 33, the top of strip block 34 is provided with sliding connection piece 37, and sliding connection piece 37 is connected with strip slide groove 32 slidingly, and the bottom of strip block 34 is fixedly connected with drive motor 35, and the bottom of drive motor 35 is connected with polishing head 36, and the polishing mechanism 3 that support frame 2 sets up is used for precision polishing to valve inner chamber, and the support frame 31 in polishing mechanism 3 is the integral support part, and the strip slide groove 32 that the top of support frame 31 is equipped with is used for limiting the moving path of sliding connection piece 37, and the lateral wall of support frame 31 is rotatably connected with two -way screw rod 33, when two -way screw rod 33 rotates, the opposite thread on the screw rod will simultaneously drive two strip blocks 34 to move to the middle or two sides symmetry, to adjust the interval and position of polishing head 36, the top of strip block 34 is connected with strip slide groove 32 slidingly through sliding connection piece 37, so as to limit its movement direction while guaranteeing the movement stability, the bottom of strip block 34 is fixed with drive motor 35, and the bottom of drive motor 35 is connected with polishing head 36, and drive motor 35 drives polishing head 36 high -speed rotation to realize the polishing of valve inner chamber surface through rotary output shaft, in conclusion, when rotary disc 6 drives three jaw calipers 7 and drives valve rotation, polishing mechanism 3 controls the radial position of polishing head 36 through two -way screw rod 33, and drive motor 35 drives polishing head 36 high -speed rotation, and the precision polishing of all -round valve inner chamber is carried out, realizes the uniform processing and surface polishing of valve inner wall, thereby improves the smoothness and sealing performance of valve inner chamber, through the combination design of rotary disc 6 and three jaw calipers 7, the valve can rotate automatically in the polishing process, so as to realize the uniform processing of inner chamber surface, compared with traditional fixed polishing structure, can effectively avoid polishing dead angle and uneven surface, secondly, polishing mechanism 3 adopts two -way screw rod 33 symmetric adjustment structure, can drive two strip blocks 34 along strip slide groove 32 symmetric movement simultaneously, realizes the synchronous advance and retreat of polishing head 36 and interval accurate control, guarantees the self -adaptation polishing of different size valve and reduces the manual adjustment error.Again, the strip block 34 is matched with the strip sliding groove 32 through the sliding connection 37, so that the polishing head 36 keeps stable linear motion during the adjustment process, preventing deviation or shaking, and improving the polishing precision; finally, when the bidirectional screw 33 rotates, the two polishing heads 36 will simultaneously approach or move away from the opposite sides of the valve inner cavity, so as to realize the symmetrical distribution of the polishing force; during the polishing process, the two polishing heads 36 simultaneously act on the valve inner wall at the same speed, height and angle, so that the radial pressure of the valve is balanced, the force deviation and deformation caused by unilateral polishing are avoided, and the polishing stability and smoothness are improved; since the polishing force partially cancels out the radial component, the entire valve body can keep stable and not deviate under the clamping state of the rotating disc 6 and the three-jaw caliper 7, realizing the symmetrical, uniform and high-precision inner cavity polishing effect; the adjusting mechanism 4 is arranged on the bidirectional screw 33 and is used for accurately adjusting the force of the polishing head 36 against the valve inner cavity; the reciprocating mechanism 5 is arranged on the support frame 31 and is used for driving the entire polishing mechanism 3 to reciprocate up and down; the strip sliding groove 32 is provided with three, and the sliding connection 37 is provided with five cylinders; two sliding connection 37 cylinders are penetrated in the strip sliding groove 32 on the front and back sides, and one sliding connection 37 cylinder is penetrated in the middle strip sliding groove 32; one end of the bidirectional screw 33 is provided with a rotating handle disc, which is used for facilitating the rotation of the bidirectional screw 33.

[0021] The adjusting mechanism 4 comprises a hollow disc 41, one end of the bidirectional screw rod 33 is rotationally connected with the hollow disc 41, the side wall of the hollow disc 41 is fixedly connected with a hollow square block 42, the outer wall of the hollow square block 42 is provided with an observation window 43, one side of the observation window 43 on the hollow square block 42 is provided with a scale table 44, the top of the hollow square block 42 is threadedly connected with an adjusting screw rod 45, the adjusting screw rod 45 is rotationally connected with a first square block 46, one side of the first square block 46 away from the adjusting screw rod 45 is connected with a return spring 47, one end of the return spring 47 away from the first square block 46 is fixedly connected with a second square block 48, the second square block 48 and the first square block 46 are slidably connected with the inner wall of the hollow square block 42, the bottom of the second square block 48 is fixedly connected with a spherical block 49, the end of the bidirectional screw rod 33 is fixedly connected with a gear piece 410, the two sides of the gear piece 410 are fixedly connected with ring blocks 411, the outer wall of the ring block 411 is rotationally connected with the inner wall of the hollow disc 41, the spherical block 49 abuts against the gear piece 410, when the hollow disc 41 is rotated, the hollow disc 41 drives the hollow square block 42 fixedly connected with the side wall to rotate synchronously, the second square block 48 is slidably connected in the hollow square block 42, so that the second square block 48 rotates under the driving of the hollow square block 42 and drives the spherical block 49 fixedly connected with the bottom to rotate, the spherical surface abuts against the inclined surface of the gear surface, when the spherical block 49 rotates, the spherical surface and the inclined surface of the gear surface abut against each other, which drives the gear piece 410 to rotate, the gear piece 410 is fixedly connected with the end of the bidirectional screw rod 33, so that the rotation of the gear piece 410 directly drives the bidirectional screw rod 33 to rotate, thereby driving the two strip blocks 34 symmetrically connected with the bidirectional screw rod 33 to move towards the middle or move away from each other, so that the polishing head 36 mounted on the strip block 34 moves relatively, when the strip block 34 moves towards the middle, the polishing head 36 abuts against the inner wall of the valve under the driving of the driving motor 35 and starts to polish, at this time, the reaction force generated by the valve is transmitted in the direction of the polishing head 36→the driving motor 35→the strip block 34→the bidirectional screw rod 33→the gear piece 410→the spherical block 49 in the reverse direction, when the abutting force increases, the spherical block 49 is forced to press against the second square block 48, thereby compressing the return spring 47 connected between the first square block 46 and the second square block 48, so that the elastic buffer is formed, when the return spring 47 is compressed to a certain degree, the rebound force of the return spring 47 drives the spherical block 49 to return to the original position, so that the spherical block 49 and the gear piece 410 are in contact and separated repeatedly, thereby cutting off the continuous transmission relationship between the gear piece 410 and the bidirectional screw rod 33, so that the automatic limiting and force feedback control are realized, so as to prevent the polishing head 36 from exerting excessive pressure on the valve and causing damage to the inner cavity.Further, by adjusting the adjusting screw rod 45 threaded on the top of the hollow square block 42, the first square block 46 can be moved up and down to compress or release the return spring 47, thereby changing the pre-tightening force of the return spring 47, adjusting the contact force between the spherical block 49 and the gear part 410, and realizing accurate control of the polishing pressure required for different valve materials and sizes. At the same time, the moving position of the first square block 46 can be observed in real time through the observation window 43 on the outer wall of the hollow square block 42, and the pre-tightening force size can be accurately displayed by cooperating with the scale table 44, so that the operator can intuitively control the polishing force parameter. The structure realizes mechanical transmission closed loop from the hollow disc 41 to the gear part 410 to the bidirectional screw rod 33, and combines the return spring 47 and the adjusting screw rod 45 to form an elastic adjustable force limiting mechanism, so that the device can automatically respond to the change of the reaction force during polishing, and can be accurately adjusted through the visual scale, thereby ensuring that the polishing force of the valve inner cavity is uniform and controllable, the machining precision is high, and the device is safe and reliable.

[0022] The reciprocating mechanism 5 includes a rotary motor 51 fixedly connected to the support frame 2, and the output end of the rotary motor 51 is fixedly connected with a reciprocating screw rod 52. The top of the support frame 31 is fixedly connected with a connecting lug 53, the inner wall of the connecting lug 53 is penetrated by the reciprocating screw rod 52, and the inner wall of the connecting lug 53 is screwed with the reciprocating screw rod 52. The outer wall of the support frame 2 is fixedly connected with a sliding plate 54, and the outer wall of the sliding plate 54 is slidingly connected with the support frame 31. The rotary motor 51 is fixedly installed on the support frame 2 as the power source of the reciprocating mechanism 5. When the rotary motor 51 is started, the output end drives the fixedly connected reciprocating screw rod 52 to rotate. The reciprocating screw rod 52 penetrates the inner wall of the connecting lug 53 and is screwed with the connecting lug 53. When the reciprocating screw rod 52 rotates, due to the screw transmission relationship, the connecting lug 53 will produce linear reciprocating motion in the axial direction of the reciprocating screw rod 52. Since the connecting lug 53 is fixed to the top of the support frame 31, the reciprocating motion of the connecting lug 53 will drive the entire support frame 31 to reciprocate along the screw axis. To ensure smooth movement of the support frame 31, the outer wall of the support frame 2 is fixedly connected with a sliding plate 54, and the outer wall of the sliding plate 54 is slidingly connected with the support frame 31. The sliding plate 54 plays a guiding and limiting role during reciprocation, so that the movement path of the support frame 31 is limited to a stable straight line, preventing it from tilting or shaking due to inertia or force deviation. The entire reciprocating mechanism 5 is driven by the rotary motor 51, so that the support frame 31 and the polishing head 36 arranged thereon can perform periodic reciprocating motion during polishing of the valve inner cavity, so that the polishing head 36 has axial reciprocating stroke while rotating, achieving more comprehensive and uniform polishing effect on the inner wall of the valve, avoiding surface unevenness caused by single-point or single-zone polishing, and improving polishing efficiency and overall finish of the valve inner cavity. The part of the support frame 31 opposite the connecting lug 53 is slotted to facilitate relative movement of the reciprocating screw rod 52 and the support frame 31.

[0023] A damping layer is arranged between the rotating disc 6 and the three-jaw caliper 7 to reduce the influence of rotating vibration on polishing accuracy. The polishing head 36 is of a replaceable structure, facilitating adjustment of the polishing contact surface according to different valve shapes. Limiting travel blocks are arranged between the support frame 31 and the sliding plate 54 to limit the maximum polishing travel.

[0024] In summary, the valve inner cavity precision polishing device, in use, first fix the valve to be processed in the clamping position of the three jaw calipers 7, the three jaw calipers 7 is connected with the output end of the rotating disc 6, the rotating disc 6 is fixed on the inner wall of the base 1, then the polishing mechanism 3 fixedly installed through the support frame 2 starts to work, the support frame 31 of the polishing mechanism 3 plays a whole support and guiding role, the bar-shaped sliding groove 32 at the top thereof limits the moving direction of the sliding connecting piece 37 to ensure the stability of the structure, the sidewall of the support frame 31 is rotationally connected with the bidirectional screw 33, when the bidirectional screw 33 rotates under the driving, it drives the two bar-shaped blocks 34 symmetrically connected with it through threads to symmetrically approach or move away along the bar-shaped sliding groove 32, and then the synchronous adjustment of the polishing head 36 is realized, when the bar-shaped block 34 moves to the appropriate position, the driving motor 35 fixedly connected at the bottom thereof starts to work, drives the polishing head 36 to rotate at high speed through the rotating output shaft, so that the polishing head 36 contacts and polishes the valve inner cavity surface, in this process, the two polishing heads 36 act on each other, ensuring that the polishing force is evenly distributed on both sides of the valve inner cavity, avoiding deformation and eccentric wear caused by unilateral stress, so that the valve inner cavity obtains symmetrical and smooth processing effect; at the same time, the adjusting mechanism 4 is used for accurately controlling the contact force of the polishing head 36, the core of the adjusting mechanism 4 is the hollow disc 41 installed at the end of the bidirectional screw 33, the sidewall of the hollow disc 41 is fixed with the hollow square block 42, the first square block 46 and the second square block 48 are slidably connected in the hollow square block 42, and the two are elastically connected through the return spring 47, the bottom of the second square block 48 is fixed with the spherical block 49, the spherical block 49 abuts against the gear piece 410 at the end of the bidirectional screw 33, when the hollow disc 41 rotates, the motion is transmitted to the gear piece 410 through the hollow square block 42, the second square block 48 and the spherical block 49, so as to drive the bidirectional screw 33 to rotate to adjust the relative position of the bar-shaped block 34, so that the polishing head 36 contacts the valve inner wall and generates polishing force, when the polishing reaction force is too large, the spherical block 49 will slide along the helical gear surface of the gear piece 410 and compress the return spring 47, realizing force feedback and limiting protection, preventing the polishing head 36 from being excessively pressed against the valve inner cavity and causing damage, the pre-tightening force of the return spring 47 can be changed through the adjusting screw 45 at the top of the hollow square block 42, so as to adjust the contact force of the spherical block 49, so that the polishing pressure can be flexibly adjusted according to the valve material, and the operator can directly read the pressure adjustment state through the observation window 43 and the scale table 44.Meanwhile, the reciprocating mechanism 5 is used to drive the polishing mechanism 3 to move periodically along the axial direction, the reciprocating mechanism 5 is driven by a rotating motor 51 fixed on the support frame 2, the output end of the rotating motor 51 is connected with a reciprocating screw 52, the reciprocating screw 52 penetrates through a connecting lug 53 on the top of the support frame 31 and is screwed with the connecting lug 53, when the rotating motor 51 rotates, the reciprocating screw 52 drives the connecting lug 53 to move linearly along the screw direction, so as to drive the whole support frame 31 to move up and down, in order to ensure the smooth movement, the outer wall of the support frame 2 is provided with a sliding plate 54, the sliding plate 54 is in sliding fit with the support frame 31 to limit the movement track and prevent the inclination or shaking, under the driving of the reciprocating movement, the polishing head 36 realizes the axial reciprocating polishing while being in rotary contact with the inner wall of the valve, so that the polishing path covers the whole area of the inner cavity of the valve, thereby obtaining the uniform, continuous and dead angle-free polishing effect, when the rotating disc 6 is started to drive the three-jawed clamp 7 to rotate synchronously, so as to realize the stable rotation of the valve to polish the inner cavity, the bidirectional screw 33 controls the radial movement of the polishing head 36, the driving motor 35 provides the rotary polishing power, the adjusting mechanism 4 realizes the polishing pressure control, the reciprocating mechanism 5 provides the axial displacement compensation, the five mechanisms form a high-precision multi-dimensional collaborative polishing system through the mechanical linkage, finally, the inner cavity of the valve obtains the precise surface treatment effect with high flatness and high smoothness in a short time, and the sealing performance and service life of the valve are improved.

[0025] It should be noted that, in this text, the relationship terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or sequence between the entities or operations. Moreover, the term "include", "contain" or any other variant thereof is intended to cover the non-exclusive inclusion, so that the process, method, article or equipment including a series of elements not only includes those elements, but also includes other elements not explicitly listed or inherent to such process, method, article or equipment. Without more limitation, the element defined by the statement "including a" does not exclude the existence of other same elements in the process, method, article or equipment including the element.

Claims

1. A precision grinding device for valve inner cavity, characterized in that: include: The base (1) is set on a flat surface to support the entire device structure; Support frame (2), which is fixedly connected to the top of the base (1) and is used to fix the components; A rotating disk (6) is disposed on the inner wall of the base (1); Three-jaw caliper (7), the output end of the rotary disk (6) is connected to the three-jaw caliper (7), the rotary disk (6) is used to electrically drive the three-jaw caliper (7) to rotate, and the three-jaw caliper (7) is used to clamp the valve; A grinding mechanism (3) is mounted on a support frame (2) and is used to grind the inner cavity of the valve. The grinding mechanism (3) includes: A support frame (31) is provided with a strip groove (32) at the top. A bidirectional screw (33) is rotatably connected to the side wall of the support frame (31). Two strip blocks (34) are symmetrically threaded on the bidirectional screw (33). A sliding connector (37) is provided at the top of the strip block (34). The sliding connector (37) is slidably connected to the strip groove (32). A drive motor (35) is fixedly connected to the bottom of the strip block (34). A grinding head (36) is connected to the bottom of the drive motor (35). Adjustment mechanism (4), which is set on bidirectional screw (33) for precisely adjusting the force of the grinding head (36) against the valve cavity; The reciprocating mechanism (5) is mounted on the support frame (31) and is used to drive the entire grinding mechanism (3) to move back and forth up and down.

2. The valve inner cavity precision grinding device according to claim 1, characterized in that: The strip groove (32) is provided in three parts, and the sliding connector (37) consists of five cylinders. The cylinders of two sliding connectors (37) pass through the strip groove (32) on the front and rear sides, and the cylinder of one sliding connector (37) passes through the strip groove (32) in the middle.

3. The valve inner cavity precision grinding device according to claim 1, characterized in that: One end of the bidirectional screw (33) is provided with a rotating handle disc to facilitate the rotation of the bidirectional screw (33).

4. The valve inner cavity precision grinding device according to claim 1, characterized in that: The adjusting mechanism (4) includes a hollow disc (41), the other end of the bidirectional screw (33) is rotatably connected to the hollow disc (41), a hollow square block (42) is fixedly connected to the side wall of the hollow disc (41), an observation window (43) is provided on the outer wall of the hollow square block (42), a scale (44) is provided on one side of the observation window (43) on the hollow square block (42), an adjusting screw (45) is threaded to the top of the hollow square block (42), a first square block (46) is rotatably connected to the adjusting screw (45), and a return mechanism is connected to the side of the first square block (46) away from the adjusting screw (45). A spring (47) is fixedly connected to a second square block (48) at one end away from the first square block (46). The second square block (48) and the first square block (46) are slidably connected to the inner wall of the hollow square block (42). A spherical block (49) is fixedly connected to the bottom of the second square block (48). A gear component (410) is fixedly connected to the end of the bidirectional screw (33). A ring block (411) is fixedly connected to both sides of the gear component (410). The outer wall of the ring block (411) is rotatably connected to the inner wall of the hollow disc (41). The spherical block (49) abuts against the gear component (410).

5. The valve inner cavity precision grinding device according to claim 1, characterized in that: The reciprocating mechanism (5) includes a rotary motor (51), which is fixedly connected to the support frame (2). The output end of the rotary motor (51) is fixedly connected to a reciprocating screw (52). The top of the support frame (31) is fixedly connected to a connecting lug (53). The inner wall of the connecting lug (53) is penetrated by the reciprocating screw (52), and the inner wall of the connecting lug (53) is threadedly connected to the reciprocating screw (52). The outer wall of the support frame (2) is fixedly connected to a sliding plate (54), and the outer wall of the sliding plate (54) is slidably connected to the support frame (31).

6. The valve inner cavity precision grinding device according to claim 5, characterized in that: The support frame (31) has a slot in the part opposite to the connecting lug (53) to facilitate the relative movement of the reciprocating screw (52) and the support frame (31).

7. The valve inner cavity precision grinding device according to claim 1, characterized in that: A shock-absorbing pad is provided between the rotary disk (6) and the three-jaw caliper (7) to reduce the impact of rotational vibration on the grinding accuracy.

8. The valve inner cavity precision grinding device according to claim 1, characterized in that: The grinding head (36) is a replaceable structure, which makes it easy to adjust the grinding contact surface according to different valve shapes.

9. A precision grinding device for valve inner cavity according to claim 5, characterized in that: A limit block is provided between the support frame (31) and the sliding plate (54) to limit the maximum grinding stroke.

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