Special device for grinding sealing surface of middle cavity of valve body

Abstract

The invention belongs to the technical field of valve machining, and particularly relates to a special device for grinding a sealing surface of a middle cavity of a stop valve body. The dustproof plug is arranged at the bottom end of a valve body, and the grinding assembly is arranged at the top end of the valve body. The dust-proof valve has the remarkable effects that the dust-proof plug adopts a circular stepped design, so that the connection between the left end channel and the middle cavity of the valve body can be effectively isolated, crystal particles of grinding sand are prevented from being adhered to the conical sealing part in the cavity of the valve body, and the sealing surface is prevented from being abraded and polluted; and grinding crystal particles and chippings generated in the grinding process can fall into the valve body cavity, and cleaning is facilitated after grinding is finished. And secondly, through cooperation of a hexagon nut, an inner hexagon screw and a pressing plate, the device can be firmly connected, and the stability of the device is better improved. According to the device, the pressing plate is made of a nylon material, so that the grinding plate is pressed, and meanwhile, the pressing plate also has relatively high strength and toughness.

Description

Technical Field

[0001] The invention belongs to the technical field of valve processing, and in particular relates to a special device for grinding the sealing surface of a center cavity of a stop valve body. Background Art

[0002] As one of the key devices for fluid control, the sealing performance of valves will have a great impact on the control effect of fluid media and whether the system can operate efficiently, safely and stably. In order to ensure the sealing performance of the valve, the valve sealing performance needs to be ground to eliminate defects such as unevenness, flaws and particles between the surfaces, thereby improving the flatness and roughness of the valve sealing surface to achieve the best sealing performance. However, due to the limitations of the valve structure and the sealing surface accuracy requirements, if the traditional grinder is directly used for grinding, it will cause certain damage to other sealing surfaces of the valve, which will make it difficult to ensure that the overall sealing performance of the valve meets the design requirements. Therefore, how to ensure that the sealing surface of the valve can meet the required requirements and improve the sealing performance of the valve is a technical problem that urgently needs to be solved. Summary of the invention

[0003] The invention provides a special device for grinding the sealing surface of the valve body cavity according to the machining accuracy requirement of the valve sealing surface.

[0004] The present invention is implemented as follows: a special device for grinding the sealing surface of the valve body cavity, which includes a dust-proof plug arranged at the bottom end of the valve body and a grinding component arranged at the top end of the valve body.

[0005] As described above, a special device for grinding the sealing surface of the valve body cavity, wherein the grinding assembly includes a coaxially arranged grinding plate and a clamping plate, wherein the grinding plate is arranged at the upper part and the clamping plate is arranged at the lower part, the grinding plate and the clamping plate are both circular parts, and their diameters match the size of the top end of the valve body, and through holes are arranged in the centers of the grinding plate and the clamping plate, and a hexagonal screw is arranged in the through hole, and a hexagonal nut is arranged below the clamping plate.

[0006] As described above, a special device for grinding the sealing surface of the valve body cavity, wherein sandpaper is arranged between the grinding plate and the pressing plate.

[0007] As described above, a special device for grinding the sealing surface of the valve body cavity is provided, wherein a slot is provided on the top of the hexagon socket screw, and the size and structure of the slot match the output shaft of the grinding motor.

[0008] As described above, a special device for grinding the sealing surface of the valve body cavity, wherein the dust plug is a circular stepped structure, which is used to prevent the grinding sand crystals generated during the grinding process from adhering to the conical sealing in the valve body cavity.

[0009] As described above, a special device for grinding the sealing surface of the valve body cavity, wherein the material of the clamping plate is nylon.

[0010] The remarkable effects of the present invention are as follows: the dustproof plug adopts a circular stepped design, which can effectively isolate the connection between the left end channel of the valve body and the middle cavity, and prevent the crystal particles of the grinding sand from adhering to the conical seal in the valve body cavity, so that the sealing surface will not be worn and contaminated. In addition, it can also make the grinding crystal particles and debris generated during the grinding process fall into the valve body cavity, which is convenient for cleaning after the grinding is completed. Secondly, by matching the hexagonal nut, the hexagon socket screw and the clamping plate, the device can be firmly connected and its stability can be better improved. The clamping plate in this device is made of nylon, which has high strength and toughness while ensuring the clamping of the grinding plate. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 This is a front view of a special device for grinding a valve sealing surface provided by the present invention;

[0012] Figure 2 It is a left side view of the special device for grinding the valve sealing surface provided by the present invention;

[0013] Figure 3 It is a top view of the special device for grinding the valve sealing surface provided by the present invention;

[0014] Figure 4 It is a half-section view of the special device for grinding the valve sealing surface provided by the present invention when it is installed on the valve body;

[0015] Figure 5 This is a half-section exploded view of the special device for grinding the valve sealing surface provided by the present invention when it is installed on the valve body;

[0016] Among them: 1. Dustproof plug; 2. Hexagonal nut; 3. Grinding plate; 4. Pressing plate; 5. Hexagon socket screw. DETAILED DESCRIPTION

[0017] A special device for grinding the sealing surface of the valve body cavity includes a dust plug, a hexagonal nut, a grinding plate, a clamping plate and a hexagon socket screw. The dust plug is inserted into the valve body channel to solve the problem of crystal particles generated during the grinding process adhering to the conical sealing surface in the valve body cavity; the hexagon socket screw is modified into a structure with a slot to solve the connection problem between the grinding device as a whole and the grinding motor; by adding a clamping plate, the clamping friction force is increased to solve the clamping problem of the grinding plate.

[0018] The dustproof plug is a circular stepped structure, which is used to prevent the grinding sand crystals produced during the grinding process from adhering to the conical seal in the valve body cavity.

[0019] The clamping plate is made of nylon and has a through-hole structure in the middle, which cooperates with the hexagonal nut and the hexagon socket screw to clamp the grinding plate.

[0020] Among them, the grinding plate adopts a through-hole structure in the middle, which can facilitate the insertion of the hexagon socket screw. By placing various types of sandpaper between the grinding plate and the clamping plate, the sealing surface of the valve body center cavity can be coarsely / finely ground and polished.

[0021] The top of the hexagon socket screw is modified into a structure with a slot, so as to facilitate connection with the rotating shaft of the grinding motor.

[0022] A specific example is given below.

[0023] The present invention provides a special device for grinding the sealing surface of the valve body cavity, comprising a dust plug 1, a hexagonal nut 2, a grinding plate 3, a clamping plate 4, and a hexagon socket screw 5. The small end of the dust plug 1 can be inserted into the channel in the valve body cavity, and the two are fixed by the friction between the dust plug 1 and the channel in the valve body cavity; the grinding plate 3 and the hexagon socket screw 5 are tightened and fixed by the clamping plate 4 and the hexagon socket nut 2; the hexagonal nut 2, the grinding plate 3, the clamping plate 4 and the hexagon socket screw 5 cooperate to form a grinding component of the special device, and the grinding component is placed flat on the step of the sealing surface, and can be matched with the valve body by relying on the structure of the grinding component itself, without the need to adopt other fixing methods.

[0024] The specific working process of the present invention is as follows:

[0025] 1. First, place the valve body with the middle flange facing upward vertically and secure the valve body to ensure that it does not move during assembly.

[0026] 2. After fixing the valve body, insert one end of the dust plug 1 into the channel in the middle cavity of the valve body to ensure that the dust plug 1 is completely fitted with the channel in the middle cavity of the valve body.

[0027] 3. Place sandpaper of the required mesh size between the grinding plate 3 and the pressing plate 4, and then insert the hexagon socket screws 5 into the through holes between the grinding plate 3 and the pressing plate 4 in sequence. Finally, screw the hexagon nut 2 onto the hexagon socket screw 5 and tighten it with a wrench to ensure that there is no relative sliding between the parts.

[0028] 4. Place the assembled grinding parts as a whole on the sealing surface of the valve body, pay attention to the fit between the grinding plate 3 and the sealing surface of the valve body, and do not knock the sealing surface when placing it. After the grinding parts are in place, connect the motor shaft of the grinding motor with the slot on the top of the hexagon socket screw 5 to grind the sealing surface of the valve body.

[0029] The above specific implementation modes are used to explain the present invention rather than to limit the present invention. Any modification and change made to the present invention within the spirit of the present invention and the protection scope of the claims shall fall within the protection scope of the present invention.

Claims

1. A special device for grinding the sealing surface of the valve body cavity, characterized in that: It comprises a dustproof plug (1) arranged at the bottom end of the valve body and a grinding assembly arranged at the top end of the valve body.

2. A special device for grinding the sealing surface of the valve body cavity as claimed in claim 1, characterized in that: The grinding assembly comprises a coaxially arranged grinding plate (3) and a pressing plate (4), wherein the grinding plate (3) is arranged at the top and the pressing plate (4) is arranged at the bottom. The grinding plate (3) and the pressing plate (4) are both circular parts, and their diameters match the size of the top end of the valve body. Through holes are arranged at the centers of the grinding plate (3) and the pressing plate (4), and a hexagon socket screw (5) is arranged in the through hole. A hexagon nut (2) is arranged below the pressing plate (4).

3. A special device for grinding the sealing surface of the valve body cavity as claimed in claim 2, characterized in that: Sandpaper is arranged between the grinding plate (3) and the pressing plate (4).

4. A special device for grinding the sealing surface of the valve body cavity as claimed in claim 3, characterized in that: A slot is arranged on the top of the hexagon socket screw (5), and the size and structure of the slot match the output shaft of the grinding motor.

5. A special device for grinding the sealing surface of the valve body cavity as claimed in claim 4, characterized in that: The dustproof plug (1) is a circular stepped structure, which is used to prevent the grinding sand crystals generated during the grinding process from adhering to the conical sealing surface in the valve body cavity.

6. A special device for grinding the sealing surface of the valve body cavity as claimed in claim 5, characterized in that: The material of the pressing plate (4) is nylon.

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