Grinding tool for semi-spherical surface of valve element of eccentric semi-spherical valve

Abstract

The utility model discloses a semi-spherical surface grinding tool for an eccentric semi-spherical valve core, which belongs to the technical field of semi-spherical surface grinding of ball valve cores and comprises the eccentric semi-spherical valve core and a body for grinding. The grinding clamping assembly comprises a grinding block which is attached to the top of the eccentric semi-ball valve element and used for grinding the eccentric semi-ball valve element; the connecting assembly comprises a pressing table arranged above the grinding block and used for being connected with the grinding block; the device is economical, practical, simple in structure and capable of meeting different flow characteristics, and valve seats with different calibers are in sealing fit with the semi-spherical surface of the valve element of the eccentric semi-spherical valve. Compared with manual grinding, the grinding machine has the advantages of low cost, high precision and high efficiency, and can save a large amount of purchase and maintenance cost and reduce the production cost compared with the purchase of professional grinding ball equipment. The idle pneumatic tapping machine is utilized to obtain low-rotating-speed rotary equipment, existing resources are fully utilized, loading and unloading are convenient, the tapping machine is turned back after the connecting sleeve is taken down and the screw tap is turned back, and the normal production schedule is not affected.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball valve core half ball surface grinding technical field, specifically point to a kind of eccentric half ball valve core half ball surface grinding frock. BACKGROUND

[0002] Eccentric half ball valve is a kind of valve, which is driven by the valve stem to rotate around the valve body axis, controls the opening and closing of the valve core half ball surface and the sealing surface of the valve seat, so as to realize the regulation and control of fluid. When the valve core half ball surface and the valve seat are tightly matched, the valve is closed. The machining precision of the valve core half ball surface of the eccentric half ball valve is very high, and the valve core half ball surface after machining is usually ground to ensure the standard and finishing of the valve core half ball surface. The mismatch of the sealing surface will affect the performance of the whole product. The valve core, as the pressure control opening and closing element of the eccentric half ball valve, is a key component, and its machining and grinding have always been the focus and difficulty in the production and machining of the eccentric half ball valve. At present, the half ball surface grinding process is mostly manual grinding, which can achieve higher precision and adaptability with the valve seat. However, the labor cost is increasing at present, and the population aging society is gradually emerging in China, so it is difficult to find skilled workers. Therefore, it is urgent to use machinery to replace manual work to complete this repetitive work. Manual grinding also has the defects of uneven grinding of the matching surface and extremely low work efficiency. There are professional automatic ball grinding equipment on the market, but the domestic ball grinding equipment has single caliber, and it needs to purchase multiple equipment to match all calibers. The imported ball grinding equipment is expensive and has high maintenance cost, which is not suitable for small and medium-sized enterprises.

[0003] The eccentric half ball valve core half ball surface has high precision, manual grinding has the defects of high work intensity of operators, high requirement for the experience and professional technical skills of fitters, and extremely low work efficiency. The purchase of professional ball grinding equipment is expensive, has low frequency of use and high maintenance cost. It is not necessary to spend a lot of money to buy special equipment, and a lot of manpower and material resources are needed for later maintenance. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problems in the above background technology, and provides an eccentric half ball valve core half ball surface grinding frock.

[0005] To solve the above technical problems, the utility model provides the technical scheme as follows:

[0006] An eccentric half ball valve core half ball surface grinding frock, comprising:

[0007] The eccentric half ball valve core is ground on the body;

[0008] The grinding clamping assembly comprises a grinding block attached to the top of the eccentric half ball valve core for grinding the eccentric half ball valve core;

[0009] A connecting assembly comprising a presser table arranged above the grinding block for connecting with the grinding block;

[0010] An adjusting assembly comprising a ball screw head screwed to the top of the presser table for adjusting the height of the eccentric half-ball valve core.

[0011] Preferably, the grinding clamping assembly further comprises a vice clamp for clamping the bottom of the eccentric half-ball valve core.

[0012] Preferably, the bottom of the grinding block is provided with an arc-shaped groove.

[0013] Preferably, the connecting assembly further comprises:

[0014] A full-thread stud screwed into a threaded groove provided on the grinding block;

[0015] A small locking nut screwed onto the full-thread stud for fixing the presser table.

[0016] Preferably, two sets of full-thread studs are provided, the presser table slides on the full-thread studs, and two sets of small locking nuts are respectively screwed onto each set of full-thread studs.

[0017] Preferably, the adjusting assembly further comprises:

[0018] A sliding plate sliding on the ball screw head;

[0019] A large locking nut screwed onto the ball screw head for fixing the sliding plate;

[0020] A connecting sleeve fixed to the sliding plate for connecting a tapping machine.

[0021] Preferably, the sliding plate and the connecting sleeve are inclined, and the large locking nut is provided with two sets.

[0022] With the above structure, the utility model has the following advantages:

[0023] 1. The device is economical and practical, simple in structure, and can meet different flow characteristics, different caliber valve seats and eccentric half-ball valve core spherical surface sealing cooperation. Compared with manual grinding, it has the advantages of low cost, high precision and high efficiency. Compared with purchasing professional grinding ball equipment, it can save a large amount of purchase and maintenance costs, reduce production costs, utilize idle pneumatic tapping machines to obtain low-speed rotary equipment, fully utilize existing resources, and is convenient to assemble and disassemble. The connecting sleeve is replaced with a tap to change it back to a tapping machine, without affecting the normal production progress.

[0024] 2、The device saves the device for increasing the speed reducing device, only needs to set the tapping machine feed amount to 0, one step to place can provide the suitable low speed uniform rotation power for the grinding tool, and the caliber range is large, and the grinding blocks of different calibers are only needed to be replaced for grinding the eccentric hemispherical valve core hemispherical surface, other parts can be reused, the resources are saved to the maximum extent, and the surface quality of the eccentric hemispherical valve core hemispherical surface is guaranteed.

[0025] The above summary is merely intended to illustrate the present description and is not intended to limit in any way. Further aspects, embodiments and features of the present application will be readily apparent from the following detailed description, taken in conjunction with the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without any creative effort.

[0027] Figure 1 It is a structure schematic view of the grinding tool for the eccentric hemispherical valve core hemispherical surface.

[0028] As shown in the figure: 1, eccentric hemispherical valve core; 2, grinding block; 3, all-thread stud; 4, pressure table; 5, small locking nut; 6, ball head screw; 7, sliding plate; 8, large locking nut; 9, connecting sleeve; 10, bench clamp clamping. DETAILED DESCRIPTION

[0029] The embodiments of the present application will be described in detail below, and examples of the embodiments are shown in the drawings, wherein the same or similar reference signs represent the same or similar elements or elements with the same or similar functions throughout. The embodiments described below by referring to the drawings are exemplary and are only used to explain the present application, and cannot be understood as a limitation of the present application.

[0030] In the description of the present application, it should be explained that, unless otherwise explicitly specified and limited, the terms "mounting", "connecting", "connecting" should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected; it can be mechanically connected, or it can be electrically connected; it can be directly connected, or it can be indirectly connected through an intermediate medium; it can be the communication inside two elements or the interaction relationship between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0031] The utility model discloses further make a detailed description in combination with the full text as follows:

[0032] Embodiment 1:

[0033] In combination with the accompanying Figure 1 The embodiment provides a eccentric hemisphere valve core 1 hemisphere grinding frock, including grinding eccentric hemisphere ball valve core, still include the grinding clamping assembly for the fixed eccentric hemisphere valve core 1 and grinding, grinding clamping assembly includes the grinding block 2 for grinding eccentric hemisphere valve core 1 on the top of eccentric hemisphere valve core 1.

[0034] As a preferred implementation, the grinding clamping assembly further includes a bench vice clamp 10 for clamping the bottom of the eccentric hemisphere valve core 1.

[0035] As a preferred implementation, the bottom of the grinding block 2 is provided with an arc-shaped groove.

[0036] It should be noted that the grinding block 2 rotates around the axis of the inclination angle of the eccentric hemisphere valve core 1 to grind the valve core, and the grinding coverage can include all matching valve seat CV values of the caliber.

[0037] Embodiment 2:

[0038] On the basis of embodiment 1, a connecting assembly is arranged to connect the grinding block 2, and the connecting assembly includes a pressing table 4 arranged above the grinding block 2 for connecting the grinding block 2.

[0039] As a preferred implementation, the connecting assembly further includes a full-thread stud 3 threaded into a threaded groove provided on the grinding block 2, and a small locking nut 5 threaded onto the full-thread stud 3 for fixing the pressing table 4.

[0040] As a preferred implementation, the full-thread stud 3 is provided with two groups, and the pressing table 4 slides on the full-thread stud 3, and each group of full-thread studs 3 is respectively threaded with two groups of small locking nuts 5.

[0041] It should be noted that the pressing table 4 is located between the two groups of small locking nuts 5, the full-thread studs 3 are located on both sides of the grinding block 2, and different grinding blocks 2 can be replaced according to different sizes of eccentric hemisphere valve cores 1.

[0042] Embodiment 3:

[0043] On the basis of embodiments 1 and 2, an adjusting assembly is arranged to connect with the tapping machine and adjust the height of the grinding block 2, and the adjusting assembly includes a ball head screw 6 ball-jointed to the top of the pressing table 4 and adjusting the height of the eccentric hemisphere valve core 1.

[0044] As a preferred embodiment, the adjusting assembly further comprises: a sliding plate 7 sliding on the ball screw 6; a large locking nut 8 threadedly connected to the ball screw 6 for fixing the sliding plate 7; and a connecting sleeve 9 fixed to the sliding plate 7 for connecting the tapping machine.

[0045] As a preferred embodiment, the sliding plate 7 and the connecting sleeve 9 are arranged obliquely, and the large locking nut 8 is provided with two groups.

[0046] It is to be noted that the connecting sleeve 9 is welded to the sliding plate 7, and the sliding plate 7 is in the middle of the two groups of large locking nuts 8.

[0047] The operation steps are as follows: the connecting sleeve 9 is connected to the idle tapping machine rotating spindle, the top of the connecting sleeve 9 is provided with a square head milled according to the ISO international standard tap pin part square head size, which can be directly replaced into the tapping machine spindle tapping chuck, the tapping machine is started, the connecting sleeve 9 can drive the tool to rotate around the tapping machine spindle, the sliding plate 7 is fixed by welding at the lower end of the connecting sleeve 9, and the end surface of the sliding plate 7 is milled with an inclination which cooperates with the bottom plate of the connecting sleeve 9; the large surface of the sliding plate 7 is milled with a long slot hole, the full threaded end of the ball screw 6 is inserted into the long slot hole, and the ball screw 6 is locked on the sliding plate 7 by the large locking nut 8, the tool can be adjusted to an appropriate height through the long slot hole on the sliding plate 7 and the thread of the ball screw 6, the lower ball head surface of the ball screw 6 cooperates with the pressing table 4, the pressing table 4 is welded by a seamless pipe and a rectangular plate, the inner hole of the seamless pipe is in close clearance fit with the ball diameter of the ball screw 6, the ball universal pressing pressing table 4 makes the stress uniform, the large surface of the rectangular plate is symmetrically drilled with two through holes, the lower part of the grinding block 2 below the pressing table 4 is provided with a hemispherical surface which cooperates with the hemispherical surface of the eccentric hemispherical valve core 1, the plane of the grinding block 2 is provided with two threaded holes with a hole distance equal to that of the through holes of the pressing table 4, two full threaded screws are screwed into the threaded holes of the grinding block 2, then are inserted into the through holes of the pressing table 4, and are locked by the small locking nut 5, the bench clamp 10 clamps the eccentric hemispherical valve core 1 workpiece to be ground, ensures that the center axis of the eccentric hemispherical valve core 1 and the axis of the tapping machine spindle are on the same straight line, evenly applies grinding paste on the hemispherical surface of the grinding block 2, adjusts the tool height to make the hemispherical surface of the grinding block 2 tightly cooperate with the hemispherical surface of the eccentric hemispherical valve core 1, so that the grinding block 2 and the eccentric hemispherical valve core 1 form an inclination angle, the tapping machine is started, the grinding tool rotates around the tapping machine spindle, the ball screw 6 presses the pressing table 4, so that the grinding block 2 rotates around the inclination angle axis of the eccentric hemispherical valve core 1 to grind the eccentric hemispherical valve core 1, and the grinding coverage can include all matching valve seats CV values of the same diameter.

[0048] The above has described the utility model and its implementation mode, and this description is not restrictive, and the shown in the full text is only one of the implementation modes of the utility model, and the actual structure is not limited thereto. In general, if a person skilled in the art is inspired thereby, without departing from the creative purpose of the utility model, similar structural modes and embodiments are not creatively designed, which should belong to the protection scope of the utility model.

Claims

1. An eccentric half ball valve spool hemisphere surface grinding tool, characterized in that: The eccentric half ball valve core (1) is grinded by the grinding clamp assembly. The grinding clamp assembly includes a grinding block (2) attached to the top of the eccentric half ball valve core (1) for grinding the eccentric half ball valve core (1). The connecting assembly includes a pressing table (4) arranged above the grinding block (2) for connecting with the grinding block (2). The adjusting assembly includes a ball screw (6) ball-jointed to the top of the pressing table (4) for adjusting the height of the eccentric half ball valve core (1). The grinding clamp assembly further includes a vice clamp (10) for clamping the bottom of the eccentric half ball valve core (1).

2. The eccentric half ball valve core hemisphere surface grinding tool according to claim 1, characterized in that: The bottom of the grinding block (2) is provided with an arc-shaped groove.

3. The eccentric half ball valve core hemisphere surface grinding tool according to claim 2, characterized in that: The connecting assembly further includes:

4. The eccentric half ball valve core hemisphere surface grinding tool according to claim 3, characterized in that: A full-thread stud (3) threadedly connected to a threaded groove provided on the grinding block (2); A small locking nut (5) threadedly connected to the full-thread stud (3) for fixing the pressing table (4). The full-thread stud (3) is provided with two groups, and the pressing table (4) slides on the full-thread stud (3), and each group of full-thread studs (3) is respectively threadedly connected with two groups of small locking nuts (5).

5. The eccentric half ball valve trim hemisphere lapping tool of claim 4, wherein: The adjusting assembly further includes:

6. The eccentric half ball valve trim half ball surface grinding tool of claim 5, wherein: A sliding plate (7) sliding on the ball screw (6); A large locking nut (8) threadedly connected to the ball screw (6) for fixing the sliding plate (7); A connecting sleeve (9) fixedly connected to the sliding plate (7) for connecting a tapping machine. The sliding plate (7) and the connecting sleeve (9) are inclinedly arranged, and the large locking nut (8) is provided with two groups.

7. The eccentric half ball valve trim hemisphere lapping tool of claim 6, wherein: ​

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