CN201120576Y - Ball plug surface grinder of ball valve - Google Patents

Abstract

The utility model relates to a ball plug surface grinding machine of a ball valve, which comprises a ball plug positioning device arranged on a horizontal shaft of the grinding machine, wherein the ball plug positioning device is used for positioning a ball plug and controlling the rotation of the ball plug; a grinding stone group arranged on the vertical shaft of the grinder, wherein the grinding stone group is provided with a plurality of grinding stones which are annularly arranged, and each grinding stone is provided with a spherical grinding surface; all the grinding surfaces form a spherical grinding space together; the grinding stone group is controlled by a power source to rotate, and the grinding surface of the grinding stone is used for grinding the spherical surface of the ball plug.

Description

ball plug surface grinder for ball valve

technical field

The utility model relates to a ball plug in a ball valve, in particular to a machine tool for grinding the spherical surface of the ball plug.

Background technique

The ball plug of the ball valve (ball plug) is a spherical structure with a flow channel running through the axis, and an appropriate position on the peripheral surface of the ball plug forms a locking groove for the locking and actuation of the valve stem. The above-mentioned ball plug structure is completed by casting a rough ball plug and then going through the finishing steps such as turning and surface polishing.

It is known that the polishing process of the spherical surface of the ball plug is performed by a belt machine. Basically, the ball plug is positioned on a rotating shaft, and the rotating shaft drives the ball plug to rotate, and then the spherical surface of the ball plug is ground with a high-speed rotating abrasive belt. The abrasive belt provides a flat brushing surface for grinding the spherical surface of the ball plug, which will not be able to accurately control the true roundness of the ball plug. Moreover, during the brushing process, the relative movement of the abrasive belt and the ball plug will form messy brush marks on the surface of the ball plug. In any case, the existing surface polishing technology will reduce the surface processing quality of the ball plug, and even cause the problem that the ball plug does not rotate smoothly in the ball valve.

The above-mentioned existing methods involve manual control, so professional and technical personnel are required to do it, and the problem of dust in the process is serious, which has a great impact on the environment and human health. However, the true circle accuracy of the spherical surface of the ball plug is difficult to control stably, the highest accuracy is about 20 μm, and the quality of the finished product cannot be upgraded.

Contents of the invention

Aiming at the deficiencies of the prior art, the purpose of this utility model is to provide a ball plug surface grinder for ball valves, which solves the problem that the traditional grinding of the ball plug by an abrasive belt machine causes the ball plug to lose its roundness and form messy grinding brush marks on the surface. question.

For realizing above-mentioned object, the technical scheme that the utility model adopts is:

A ball plug surface grinder for a ball valve, comprising a ball plug positioning device arranged on the horizontal axis of the grinding machine, the ball plug positioning device is used for positioning a ball plug and controlling its rotation; A grinding stone group on the vertical axis of the grinder, the grinding stone group has a number of circularly arranged inner spherical R-angle grinding stones, each grinding stone has an arc concave grinding surface; each of the grinding surfaces together constitute An arc-shaped grinding space; the grinding stone group is controlled by a power source to rotate, and the rotating grinding surface performs circular cross grinding on the spherical surface of the rotating ball plug.

Compared with the prior art, the utility model adopting the above-mentioned technical solution has the advantages of:

1. In this utility model, the grinding stone group and the ball plug positioning device with the above-mentioned z-axis and x-axis facing each other cooperate with the cross-grinding action of the respective rotation of the ball plug and the grinding stone group to grind the outer surface of the ball plug. The ball grinding technology combined by two rotating devices intersecting the z-axis realizes the grinding concept of two circles intersecting, which can precisely control the roundness of the ball plug, and make the surface of the ball plug uniformly ground, the surface is bright and Meticulous, comprehensively improve the surface processing quality of the ball plug.

2. The ball plug positioning device of the present utility model uses a ball plug positioning shaft for a ball plug to cover its outside. The ball plug positioning shaft is combined with an outer shaft sleeve with an inner shaft sleeve of different taper, and then controls the position of the ball plug. The outward expansion angle of the outer shaft sleeve mentioned above is expected to enable ball plugs of different sizes to be fixed on the described ball plug positioning shaft.

3. The grinding stone set of the utility model can be replaced with grinding stones with different grinding surface sizes to adapt to the surface grinding of ball plugs of various sizes.

4. The grinding machine equipment of this utility model is a fully automatic grinding technology, which does not involve manual operation, so the ball plug with a true roundness of more than 5 μm can be ground without the need for professionals, and the precision control is stable, and cutting and grinding water is applied during the process , to solve the problem of the impact of dust on the environment and human health.

Description of drawings

Fig. 1 is the plane sketch map of the utility model grinder;

Fig. 2 is the three-dimensional exploded view of the ball plug positioning shaft of the grinder of the present invention;

Fig. 3 is a combined appearance diagram of the ball plug positioning shaft of the grinding machine of the present invention;

Fig. 4 is the three-dimensional exploded view of the grinding stone group of the grinder of the present invention;

Fig. 5 is a combination appearance diagram of the grinding stone group of the grinding machine of the present invention;

Fig. 6 is a schematic diagram of the grinding ball plug of the grinding machine of the present invention.

Detailed ways

In order to illustrate the central idea of the utility model in the column of the above-mentioned content of the invention, it is expressed in specific embodiments. Various objects in the embodiments are drawn according to the proportions suitable for illustration rather than the proportions of actual components, and are described first.

As shown in Fig. 1, the ball plug grinder of the utility model ball valve includes a grinding device 10 arranged on the vertical axis (z-axis) of the grinder and a ball plug positioning device 30 arranged on the horizontal axis (x-axis). The ball plug positioning device 30 is used for positioning a ball plug 31 (as shown in FIG. 3 ) and controlling its rotation. The grinding device 10 grinds the surface of the ball plug 31 with a high-speed rotating grinding stone group 20 . The ball plug positioning device 30 is arranged on a finely adjustable platform 40 so as to adjust the position left and right, so that the center position of the ball plug 31 can form a concentric axis with the grinding stone group 20 .

As shown in FIG. 1 , FIG. 2 , and FIG. 3 , the ball positioning device 30 includes a power source 32 and a ball positioning shaft 33 , and the power source 32 can control the rotation of the ball positioning shaft 33 . The ball plug positioning shaft 33 includes an outer sleeve 34 and an inner sleeve 35 . The outer sleeve 34 includes a fixing portion 341 and a claw portion 342 , both of which are integral structures with the same axis. The fixing part 341 is a tapered shaft, which is used to be inserted into the transmission shaft 321 of the power source 32; the petal claw part 342 is a hollow cylinder, and the surrounding wall is formed by a number of sectional grooves 343. A plurality of petal claws 344 capable of expanding and contracting relative to the axial direction, the petal claw portion 342 has an opening 345 at an end opposite to the fixed portion 341 . The inner bushing 35 includes a fixing portion 351 , a tapered shaft body 352 and a force-applying portion 353 , and the three are integral structures with the same axis. The inner sleeve 35 is inserted into the outer sleeve 34 through the entrance 345 . The fixing part 351 is used to be fixed inside the outer shaft sleeve 34, both of which are implemented in the form of screws and threaded holes. The shaft body 352 is relative to the petal claw part 342 , and the petal claw 344 expands outward by a predetermined angle by utilizing its taper. The force part 353 is convenient to control the rotation of the inner bushing 35 with a tool or by hand, so that the above-mentioned screw rod is combined into the threaded hole and fastened and positioned.

As shown in Figure 6, the ball plug 31 is sleeved on the outside of the outer bushing 34 with its axial flow channel 311, and then inserted into the inner bushing 35 in the outer bushing 34 to spread out the outer bushing 34. The petal claw part 342 mentioned above, so that the petal claw part 342 is closely matched with the inner wall of the axial flow channel 311, and the ball plug 31 is fixed on the ball plug positioning shaft 33, so that it is driven by its power source 32. control while rotating.

As shown in FIG. 1 , FIG. 4 , and FIG. 5 , the grinding device 10 includes a power source 11 and a grinding stone set 20 , and the power source 11 can control the rotation of the grinding stone set 20 . The grinding stone set 20 includes a grinding stone fixing seat 21 carrying grinding stones, a plurality of annularly arranged slots 211 and partitions 212 arranged between two adjacent slots 211 are provided inside. A plurality of grinding stones 22 with inner spherical R angles, each grinding stone 22 has a non-cylindrical positioning portion 221 and an arc concave grinding surface 222 formed on the end of the grinding stone 22 . The positioning portion 221 is disposed in the insertion groove 211 and is located between the compartments 212 , and the grinding surfaces 222 of the grinding stones 22 together form a concave grinding space. A fixed block 24 with a concentric taper is connected and fixed at the center of the grinding stone fixing base 21 and fastens each grinding stone 22 . The fixed block 24 is also connected to the transmission shaft (not shown) of the power source 11 of the grinding device 10, and the above-mentioned fixed block 24 can be fixed in the grinding stone holder 21 in any existing manner. Or be connected with the transmission shaft of the power source.

As shown in Figure 6, the above-mentioned arc concave grinding space is for the spherical surface of the ball plug 31 positioned on the ball plug positioning shaft 33 to be accommodated therein, and the grinding surface 222 of each grinding stone 22 contacts the spherical surface of the ball plug 31. Spherical surface, the ball plug positioning shaft 33 drives the ball plug 31 to rotate, and cooperates with the rotating grinding stone group 20 to grind the surface of the ball plug 31 through the cross rotation of two circles.

With the grinding device 10 and the ball plug positioning device 30 in the z-axis and x-axis directions above, in conjunction with the cross action of the ball plug 31 and the two circumferences of the grinding stone group 20, and the arc-shaped concave grinding surface 222 of each grinding stone 22, it can The surface of the ball plug 31 is uniformly ground, the surface texture is fine and uniform, and the roundness of the ball plug 31 can be controlled. Overall, the ball processing precision and stable quality of the ball plug 31 are improved.

The ball plug positioning device 30 of the utility model uses the shaft bodies 352 of different tapers, so that the inner shaft sleeve 35 can control the expansion angle of the petal claw portion 342 of the outer shaft sleeve 34, so that ball plugs of different sizes can be fixed on the The ball plunger positioning shaft 33. In addition, the grinding stone set 20 of the present invention can also be replaced with grinding stones 22 having grinding surfaces 222 of different arc-concave sizes to adapt to surface grinding of ball plugs of various sizes.

The above description is only illustrative, rather than restrictive, of the present utility model. Those of ordinary skill in the art understand that many modifications, changes or equivalents can be made without departing from the spirit and scope defined in the claims. But all will fall within the limitable scope of the claims of the present utility model.

Claims (10)

1. the bulb stopper surface grinding machine of a ball valve, it is characterized in that: described grinder comprises:

One is located at the bulb stopper positioner (30) of described grinder trunnion axis; Its rotation is located and controlled to described bulb stopper positioner (30) for a bulb stopper (31);

One is located at the grinding stone group (20) of described grinder vertical axis, and described grinding stone group (20) has some grinding stones (22) of annular arrangement, and each grinding stone (22) has the abradant surface (222) of an arc concave; Each described abradant surface (222) constitutes a hemispherical grinding space jointly; Described grinding stone group (20) is rotated by a power source (11) control, with described abradant surface (222) spherical surface of described bulb stopper (31) is ground.

2. the bulb stopper surface grinding machine of ball valve according to claim 1, it is characterized in that: above-mentioned bulb stopper positioner (30) comprises a power source (32) and a bulb stopper locating shaft (33), and the described bulb stopper locating shaft of described power source (32) control rotates (33); Described bulb stopper (31) is enclosed within the outside of described bulb stopper locating shaft (33) with its axle center runner (311).

3. the bulb stopper surface grinding machine of ball valve according to claim 2, it is characterized in that: above-mentioned bulb stopper locating shaft (33) comprises an outer shaft (34) and an internal axle sleeve (35); Described outer shaft (34) is fixed on the power transmission shaft (321) of described power source (32), and it has one can be with respect to its axis direction and the claw portion (342) of hypertonic activity; Above-mentioned bulb stopper (31) is enclosed within outside the described claw portion (342) with its axle center runner (311), described internal axle sleeve (35) is set on described claw portion (342) with the axis body (352) of a taper, described claw portion (342) outwards struts, and is fastened on the described axle center runner (311).

4. the bulb stopper surface grinding machine of ball valve according to claim 3 is characterized in that: above-mentioned outer shaft (34) comprises that more one is connected in the fixed part (341) of described claw portion (342) one ends, in order to be connected in described power source (32).

5. the bulb stopper surface grinding machine of ball valve according to claim 4, it is characterized in that: described claw portion (342) is a hollow tube-shape, perisporium is established with some profile grooves (343) and is formed some claws (344) that have with respect to the expansion-contraction ability of axis direction, and described claw portion (342) has a gateway (345) in contrast to an end of described fixed part (341).

6. the bulb stopper surface grinding machine of ball valve according to claim 3, it is characterized in that: described internal axle sleeve (35) comprises that more one is connected in the fixed part (351) of described axis body (352) one ends, and described fixed part (351) is in order to be fixed on the inside of described outer shaft (34).

7. the bulb stopper surface grinding machine of ball valve according to claim 6, it is characterized in that: described internal axle sleeve (35) and described outer shaft (34) are to be connected with screw rod, screwed hole.

8. the bulb stopper surface grinding machine of ball valve according to claim 7, it is characterized in that: described internal axle sleeve (35) comprises that more one is connected in the portion of putting forth effort (353) of described axis body (352) other end.

9. the bulb stopper surface grinding machine of ball valve according to claim 1, it is characterized in that: described bulb stopper positioner (30) is arranged on the fine-tuning platform (40), so that about the accent pan position, make the centre of sphere of bulb stopper (31) aim at the axle center of described grinding stone group (20).

10. the bulb stopper surface grinding machine of ball valve according to claim 1, it is characterized in that: described grinding stone group (20) comprises a grinding stone holder (21), and its inside provides the caulking groove (211) of some annular arrangements and has been located at isolating part (212) between the two adjacent caulking grooves (211); Above-mentioned some grinding stones (22) are located in the above-mentioned caulking groove (211) one by one, and a fixed block (24) is fixed on the center of described grinding stone holder (21), and fastening each grinding stone (22).

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