A high-pressure resistant valve casting and its processing method

Abstract

The present invention discloses a high-pressure resistant valve casting and a processing method thereof, wherein the high-pressure resistant valve casting comprises a valve body, a transfer structure, an extension structure and a positioning bolt; the left and right sides of the valve body of the high-pressure resistant valve casting of the present invention are respectively fastened with a transfer structure and an extension structure by two positioning bolts, the valve body is made of high-performance steel, and a reinforcing rib is provided at the arc-shaped part inside the valve body, and the inner side wall of the valve body is sprayed with a corrosion-resistant coating to improve the pressure resistance of the valve body; the first oblique head tube and the second oblique head tube are connected at the inclined surfaces on the transfer structure, so that the position between the first oblique head tube and the second oblique head tube is rotated to adjust and change the direction, so that the direction of docking can be adjusted and changed, and the length position of the docking can be changed by the extension structure, thereby improving the adaptability, flexibility and convenience of the overall installation, and improving the work efficiency of installation and use.

Description

Technical Field

[0001] The present invention relates to the technical field of valve castings, in particular to a high-pressure resistant valve casting and a processing method thereof. Background Art

[0002] Valves are control components in pipeline fluid delivery systems, used to change the cross-section of the passage and the direction of medium flow. They have functions such as diversion, cut-off, throttling, check, diversion or overflow pressure relief. Valve castings are generally formed by casting, and usually a large number of bolts and nuts are used to install the valve casting on the pipeline.

[0003] At present, China's patent application number: CN202021456426.5 discloses a high-precision valve casting that is resistant to high pressure, which includes a valve base body, an installation box installed directly above the valve base body, and a mounting plate installed directly above the installation box. The valve casting body is fixed on the top wall of the installation plate, and vertical limit columns are fixed at both ends of the bottom wall of the installation plate. First limit grooves are provided on both sides of the outer top wall of the installation box, and the bottom ends of the two limit columns are respectively clearance-fitted inside the two first limit grooves. A mounting hole is provided in the middle section of the top wall of the installation box.

[0004] However, during the installation and use of the existing high-pressure resistant valve castings, the interfaces of the valve castings are usually fixed, which makes it inconvenient to flexibly adjust the installation direction and interface docking of the valve according to actual needs. The adaptability and flexibility are relatively poor. In addition, during the production and processing of the valve castings, it is inconvenient to polish different positions inside the valve castings, which affects the performance of the valve castings. Summary of the Invention

[0005] The object of the present invention is to provide a high-pressure resistant valve casting and a processing method thereof to solve the problems raised in the above background technology.

[0006] In order to achieve the above-mentioned objectives, the present invention adopts the following technical solutions: a high-pressure resistant valve casting, comprising a valve body, a transfer structure, an extension structure and a positioning bolt, wherein the left and right sides of the valve body are respectively fastened with a transfer structure and an extension structure by two positioning bolts, a reinforcing rib is provided at the arc inside the valve body, and a corrosion-resistant coating is sprayed on the inside of the valve body, the transfer structure comprises a first beveled head tube installed on the left side of the valve body, a second beveled head tube rotatably arranged on the left side of the first beveled head tube, a first flange integrally formed at the left end portion of the second beveled head tube, a double-headed screw penetrating the side walls of the first beveled head tube and the second beveled head tube, and a nut threadedly connected to both ends of the double-headed screw, the right side of the outer surface of the first beveled head tube is connected to the positioning bolt, and the connecting bevels of the first beveled head tube and the second beveled head tube are both 45 degrees.

[0007] Preferably, a sealing rubber ring is provided at the inclined surface of the first inclined head pipe, and convex shapes are provided at the connection parts of the first inclined head pipe and the second inclined head pipe with the double-headed screw, and a sealing block is provided inside the convex shape.

[0008] Preferably, the extension structure includes a first hollow threaded pipe with its left side connected to the right side inside the valve body, a second hollow threaded pipe provided on the right side inside the first hollow threaded pipe, an internal threaded sleeve threadedly connected to the threaded parts on the outer surfaces of the first hollow threaded pipe and the second hollow threaded pipe, a cover cylinder fastened to the outer surface of the internal threaded sleeve, and a second flange fixedly connected to the right end of the second hollow threaded pipe. The left side of the outer surface of the first hollow threaded pipe is connected to a positioning bolt.

[0009] Preferably, the threads on the outer surfaces of the first hollow threaded pipe and the second hollow threaded pipe are arranged in opposite directions. Thread grooves with opposite spiral directions are respectively formed on the left and right sides inside the internal threaded sleeve, and the thread grooves on the left and right sides are threadedly connected to the threaded parts on the outer surfaces of the first hollow threaded pipe and the second hollow threaded pipe respectively.

[0010] Preferably, slots are formed on the front and rear sides inside the first hollow threaded pipe. An insertion cylinder is provided on the left side of the second hollow threaded pipe, and insertion strips are provided on the front and rear sides of the insertion cylinder. The insertion cylinder is inserted and connected inside the first hollow threaded pipe, and the insertion strips are located inside the slots.

[0011] In addition, the present invention provides a processing method for a high-pressure-resistant valve casting, and the processing method is as follows:

[0012] S1. A valve body with reinforcing ribs at the internal arc is cast and shaped by using high-performance steel through a casting mold.

[0013] S2. A grinding device is inserted into the valve body for grinding to make the inner wall of the valve body smooth and free of burrs. A corrosion-resistant coating is sprayed inside the ground valve body and dried.

[0014] S3. The transfer structure and the extension structure are respectively assembled on the left and right sides inside the valve body processed in step S2, and locked and positioned by positioning bolts to form a valve casting.

[0015] Preferably, the grinding device includes a bottom plate, an electric push rod connected to the right side of the top of the bottom plate, a connection head rotatably connected to the left output shaft of the electric push rod, a shaft rod rotatably arranged inside the left side of the connection head, a first gear wrapped around the left outer surface of the shaft rod, a first support connected to the middle of the left side of the first gear, a grinding head structure installed at the left end of the shaft rod, a second support arranged at the middle of the right side of the first gear, a second gear meshing with the rear side of the first gear, and a first motor whose output shaft is connected to the middle side inside the second gear. The bottoms of both the first support and the second support are fixed to the bottom plate. The front side of the first motor is fastened to the second support. A groove is formed in the middle of the top of the shaft rod. A clamping block is arranged at the middle upper side inside the first gear, and the clamping block is inserted and slid inside the groove. The bottom of the grinding head structure is connected to the bottom plate.

[0016] Preferably, the grinding head structure includes a rotating shaft column connected to the shaft rod at the middle of the right side, brackets arranged on the front and rear sides of the rotating shaft column, a support rod fixedly connected to the left end of the rotating shaft column, a positioning rod integrally formed at the left end of the support rod, a collar slidably connected to the outer surface of the support rod, a sheave fixedly connected to the right outer surface of the collar, an adjusting component slidably arranged inside the top of the sheave, a pull rod rotatably connected to the left top of the collar, a rotating frame rotatably connected to the left end of the pull rod, and a grinding roller fastened to the bottom side of the front part of the rotating frame. The left end of the positioning rod is rotatably connected to the rotating frame. The bottom right side of the adjusting component is fastened to the bracket.

[0017] Preferably, two annular grooves are formed in the middle of the outer surface of the rotating shaft column. Two positioning insertion columns are arranged on both the front and rear sides of the bracket. The inner sides of the positioning insertion columns are arc-shaped, and the arc-shaped parts of the positioning insertion columns are inserted and connected to the inner sides of the annular grooves. Slide bars are slidably arranged on both the front and rear sides of the bottom of the bracket, and the bottoms of the slide bars are fixed to the bottom plate.

[0018] Preferably, the adjusting component includes an arch frame fastened to the middle of the top of the bracket, a second motor fastened to the middle of the top of the arch frame, a threaded rod connected to the left output end of the second motor, an internal threaded block threadedly connected to the outer surface of the threaded rod, a positioning plate connected to the outer surface of the internal threaded block, and two guide rods penetrating through both the front and rear sides of the positioning plate. The bottom right side of the guide rod is fixed to the arch frame. The bottom of the positioning plate is inserted and slid inside the top of the sheave.

[0019] Compared with the prior art, the beneficial effects of the present invention are:

[0020] On the left and right sides inside the valve body of the high-pressure resistant valve casting of the present invention, a transfer structure and an extension structure are respectively fastened by two positioning bolts. The valve body is made of high-performance steel, and reinforcing ribs are provided at the arc-shaped part inside the valve body. The inner side wall of the valve body is sprayed with a corrosion-resistant coating to improve the pressure resistance of the valve body. The connecting inclined surfaces on the transfer structure are both provided with a first inclined head tube and a second inclined head tube at an angle, so that the rotation position between the first inclined head tube and the second inclined head tube can be adjusted to change the direction, and the docking direction can be adjusted and changed. Moreover, the docking length position can be changed through the extension structure, improving the adaptability, flexibility and convenience of the overall installation, and improving the working efficiency of installation and use.

[0021] The threads on the outer surfaces of the first hollow threaded tube and the second hollow threaded tube of the present invention are arranged in opposite directions. Thread grooves with opposite spiral directions are respectively opened on the left and right sides inside the internal threaded sleeve, so that after the internal threaded sleeve rotates, the first hollow threaded tube and the second hollow threaded tube move away from or close to each other through the cooperation with the threads on the surfaces of the first hollow threaded tube and the second hollow threaded tube. Slots are opened on the front and back sides inside the first hollow threaded tube. An insertion cylinder is provided on the left side of the second hollow threaded tube, and insertion strips are provided on the front and back sides of the insertion cylinder. The insertion cylinder is inserted and connected inside the first hollow threaded tube, and the insertion strips are located inside the slots to ensure that the positions between the first hollow threaded tube and the second hollow threaded tube do not shift, ensuring the stability of the mutual displacement.

[0022] In the processing method of the high-pressure resistant valve casting of the present invention, a grinding device is optimized for use. Under the action of the electric push rod, the connecting head drives the shaft rod to make a lateral displacement movement inside the first gear, so that the rotating shaft column makes a lateral displacement and rotation under the action of the shaft rod, thereby driving the grinding roller to rotate after extending into the valve body to polish the inside of the valve body. And under the action of the position adjustment assembly, the grooved pulley drives the collar to move horizontally on the surface of the support rod. After the collar moves horizontally, the pull rod drives the rotating frame to rotate at an angle on the positioning rod, so that the position of the grinding roller is adjusted and changed, so as to polish different positions inside the valve body, improving the grinding and polishing effect, and further improving the adhesion effect of the inner coating, and improving the service performance of the valve casting to a certain extent.

[0023] Two annular grooves are opened in the middle of the outer surface of the rotating shaft column of the present invention. Positioning strips are provided on the front and back sides of the support rod, and the positioning strips are inserted inside the collar and are slidably connected to it horizontally to ensure the stability of the horizontal displacement of the collar. Two positioning insertion columns are provided on both the front and back sides of the support. The inner sides of the positioning insertion columns are arc-shaped, and the arc-shaped parts of the positioning insertion columns are inserted and connected inside the annular grooves to play a role in supporting and limiting the rotating shaft column. When the shaft rod moves horizontally, the support moves horizontally through the cooperation of the rotating shaft column and the positioning insertion columns. And when the shaft rod rotates, the rotating shaft column rotates inside the positioning insertion columns. Slide bars are slidably provided on the front and back sides of the bottom of the support, and the bottoms of the slide bars are fixed to the bottom plate to ensure the stability of the horizontal displacement of the support. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of the present invention;

[0025] Figure 2 It is a structural schematic diagram of the switching structure of the present invention;

[0026] Figure 3 It is a structural schematic diagram of the extended structure of the present invention;

[0027] Figure 4 It is a structural schematic diagram of the internal threaded casing of the present invention;

[0028] Figure 5 Schematic diagram of the structure of the first hollow threaded tube and the second hollow threaded tube of the present invention;

[0029] Figure 6 This is a flowchart of the processing method of the high-pressure resistant valve casting of the present invention;

[0030] Figure 7 It is a structural schematic diagram of the grinding equipment of the present invention;

[0031] Figure 8 Schematic diagram of the structure of the grinding head of the present invention;

[0032] Figure 9 It is a structural schematic diagram of the position adjustment component of the present invention.

[0033] Figure: valve body 1, adapter structure 2, extension structure 3, positioning bolt 4, first oblique tube 21, second oblique tube 22, first flange 23, double-headed screw 24, nut 25, sealing rubber ring 211, first hollow threaded tube 31, second hollow threaded tube 32, internally threaded sleeve 33, cover tube 34, second flange 35, slot 311, insert tube 321, insert strip 322, bottom plate 51, electric push rod 52, connector 53, shaft 54, first gear 55, first support 56, grinding wheel Head structure-57, second support-58, second gear-59, first motor-510, rotating shaft column-571, bracket-572, support rod-573, positioning rod-574, collar-575, groove wheel-576, adjustment assembly-577, pull rod-578, rotating frame-579, grinding roller-5710, annular groove-5711, positioning column-5721, slide bar-5722, arch frame-5771, second motor-5772, threaded rod-5773, internal thread block-5774, positioning plate-5775, guide rod-5776. DETAILED DESCRIPTION

[0034] In order to further explain the technical solution of the present invention, specific embodiments are described in detail below.

[0035] See also Figure 1 、 Figure 2 、 Figure 3 、 Figure 4 and Figure 5 The present invention provides a high-pressure resistant valve casting, including a valve body 1, a transfer structure 2, an extension structure 3 and a positioning bolt 4. The transfer structure 2 and the extension structure 3 are respectively fastened on the left and right sides of the valve body 1 by two positioning bolts 4. The valve body 1 is made of high-performance steel, and a reinforcing rib is provided at the arc-shaped part inside the valve body 1. The inner wall of the valve body 1 is sprayed with a corrosion-resistant coating to improve the pressure resistance of the valve body 1. The direction of the docking can be adjusted and changed by the transfer structure 2, and the length position of the docking can be changed by the extension structure 3, thereby improving the adaptability, flexibility and convenience of the overall installation and improving the work efficiency of installation and use.

[0036] The adapter structure 2 includes a first oblique head tube 21 installed on the left side of the valve body 1, a second oblique head tube 22 rotatably arranged on the left side of the first oblique head tube 21, a first flange 23 integrally formed at the left end of the second oblique head tube 22, a double-headed screw 24 penetrating the side walls of the first oblique head tube 21 and the second oblique head tube 22, and a nut 25 threadedly connected to both ends of the double-headed screw 24, so that the first oblique head tube 21 and the second oblique head tube 22 are tightly fixed to each other through the cooperation of the double-headed screw 24 and the nut 25. The right side of the outer surface of the first oblique head tube 21 It is connected to the positioning bolt 4 so that it can be installed and positioned on the valve body 1. The connecting bevels of the first oblique head tube 21 and the second oblique head tube 22 are both 45 degrees. A sealing rubber ring 211 is provided on the bevel of the first oblique head tube 21 to improve the sealing of the connection, and through the contact of the two 45-degree surfaces, the position between the first oblique head tube 21 and the second oblique head tube 22 can be rotated to adjust the direction. The connection between the first oblique head tube 21 and the second oblique head tube 22 and the double-headed screw 24 is provided with a protrusion, and a sealing block is provided inside the protrusion to ensure the airtightness of the connection.

[0037] Among them, the extension structure 3 includes a first hollow threaded tube 31 with its left side connected to the right side inside the valve body 1, a second hollow threaded tube 32 arranged on the right side inside the first hollow threaded tube 31, an internal threaded sleeve 33 threadedly connected to the threaded portions on the outer surfaces of the first hollow threaded tube 31 and the second hollow threaded tube 32, a cover cylinder 34 fastened to the outer surface of the internal threaded sleeve 33, and a second flange 35 fixedly connected to the right end of the second hollow threaded tube 32. The left side of the outer surface of the first hollow threaded tube 31 is connected to the positioning bolt 4, so that the first hollow threaded tube 31 is installed on the side of the valve body 1 through the positioning bolt 4. And under the action of the cover cylinder 34, the internal threaded sleeve 33 moves on the surfaces of the first hollow threaded tube 31 and the second hollow threaded tube 32, so that the first hollow threaded tube 31 and the second hollow threaded tube 32 approach or move away from each other, thereby extending the position where the second flange 35 is located, making the length of the valve more adjustable, adapting to different installation depths or pipe spacings, and improving the adaptability of the valve.

[0038] Among them, the threads on the outer surfaces of the first hollow threaded tube 31 and the second hollow threaded tube 32 are arranged in opposite directions. Thread grooves with opposite spiral directions are respectively opened on the left and right sides inside the internal threaded sleeve 33, and the thread grooves on the left and right sides are respectively threadedly connected to the threaded portions on the outer surfaces of the first hollow threaded tube 31 and the second hollow threaded tube 32, so that after the internal threaded sleeve 33 rotates, the first hollow threaded tube 31 and the second hollow threaded tube 32 approach or move away from each other through the cooperation with the threads on the surfaces of the first hollow threaded tube 31 and the second hollow threaded tube 32. Slots 311 are opened on the front and rear sides inside the first hollow threaded tube 31. An insertion cylinder 321 is arranged on the left side of the second hollow threaded tube 32, and insertion strips 322 are arranged on the front and rear sides of the insertion cylinder 321. The insertion cylinder 321 is inserted and connected inside the first hollow threaded tube 31, and the insertion strips 322 are located inside the slots 311 to ensure that the positions between the first hollow threaded tube 31 and the second hollow threaded tube 32 do not shift, ensuring the stability of the mutual displacement.

[0039] Please refer to Figure 1 、 Figure 6 、 Figure 7 、 Figure 8 and Figure 9 , the present invention provides a processing method for a high-pressure resistant valve casting, and the processing method is as follows:

[0040] S1. Using high-performance steel, cast and shape a valve body 1 with reinforcing ribs at the internal arc through a casting mold;

[0041] S2. Insert a polishing device into the valve body 1 for polishing to make the inner wall of the valve body 1 smooth and free of burrs. Spray a corrosion-resistant coating inside the polished valve body 1 and perform a drying treatment;

[0042] S3. Assemble the adapter structure 2 and the extension structure 3 on the left and right sides inside the valve body 1 processed in step S2 respectively, and lock and position them with positioning bolts 4 to form a valve casting.

[0043] Among them, the grinding device includes a bottom plate 51, an electric push rod 52 connected to the right side of the top of the bottom plate 51, a connector 53 rotatably connected to the left output shaft of the electric push rod 52, a shaft rod 54 rotatably arranged on the left side inside the connector 53, and a first gear 55 wrapped around the left outer surface of the shaft rod 54. Under the action of the electric push rod 52, the connector 53 drives the shaft rod 54 to make a lateral displacement movement inside the first gear 55. A first support 56 is connected to the middle of the left side of the first gear 55 to ensure the stability of the rotation of the first gear 55. A grinding head structure 57 is installed at the left end of the shaft rod 54 to make the grinding head structure 57 act under the action of the shaft rod 54. A second support 58 is arranged at the middle of the right side of the first gear 55, a second gear 59 meshed with the rear side of the first gear 55, and a first motor 510 with an output shaft connected to the middle side inside the second gear 59. To make the second gear 59 drive the first gear 55 to rotate inside the two supports through the first motor 510, so that the first gear 55 drives the shaft rod 54 to make a rotation movement. The bottoms of the first support 56 and the second support 58 are both fixed to the bottom plate 51, and the bottom of the grinding head structure 57 is connected to the bottom plate 51 to play a role of support and positioning. The front side of the first motor 510 is fastened to the second support 58. A groove is provided in the middle of the top of the shaft rod 54, and a clamping block is arranged on the upper middle side inside the first gear 55, and the clamping block is inserted and slides inside the groove, so as to facilitate the lateral movement of the shaft rod 54 inside the first gear 55, and after moving the position, the shaft rod 54 makes a rotation movement through the rotation of the first gear 55.

[0044] Among them, the grinding head structure 57 includes a rotating shaft column 571 connected to the shaft rod 54 in the middle on the right side. Under the action of the shaft rod 54, the rotating shaft column 571 performs lateral displacement and rotation. Support brackets 572 are arranged on the front and rear sides of the rotating shaft column 571 to support and limit the rotating shaft column 571 through the support brackets 572. A support rod 573 fixedly connected to the left end of the rotating shaft column 571, a positioning rod 574 integrally formed at the left end of the support rod 573, a collar 575 slidably connected to the outer surface of the support rod 573, a sheave 576 fixedly connected to the right side of the outer surface of the collar 575, and an adjustment component 577 slidably arranged inside the top of the sheave 576. Under the action of the adjustment component 577, the sheave 576 drives the collar 575 to laterally move on the surface of the support rod 573. A pull rod 578 rotatably connected to the left side of the top of the collar 575, a rotating frame 579 rotatably connected to the left end of the pull rod 578, and a grinding roller 5710 fastened to the bottom side of the front part of the rotating frame 579. The left end of the positioning rod 574 is rotatably connected to the rotating frame 579. After the collar 575 laterally moves, the pull rod 578 drives the rotating frame 579 to rotate at an angle on the positioning rod 574, so as to adjust and change the position faced by the grinding roller 5710, so as to polish different positions inside the valve body 1, improving the grinding and polishing effect. The bottom right side of the adjustment component 577 is fastened to the support bracket 572. Two annular grooves 5711 are provided in the middle of the outer surface of the rotating shaft column 571. Positioning strips are arranged on the front and rear sides of the support rod 573, and the positioning strips are inserted into the inner side of the collar 575 and are slidably connected to it horizontally to ensure the stability of the lateral displacement of the collar 575. Two positioning pins 5721 are arranged on the front and rear sides of the support bracket 572. The inner side of the positioning pin 5721 is arc-shaped, and the arc-shaped part of the positioning pin 5721 is inserted and connected to the inner side of the annular groove 5711 to support and limit the rotating shaft column 571. When the shaft rod 54 moves laterally, the support bracket 572 laterally displaces through the cooperation of the rotating shaft column 571 and the positioning pin 5721. When the shaft rod 54 rotates, the rotating shaft column 571 rotates inside the positioning pin 5721. Slide bars 5722 are slidably arranged on the front and rear sides of the bottom of the support bracket 572, and the bottoms of the slide bars 5722 are fixed to the bottom plate 51 to ensure the stability of the lateral displacement of the support bracket 572.

[0045] Among them, the position adjustment component 577 includes an arch frame 5771 fastened to the middle of the top side of the bracket 572, a second motor 5772 fastened to the middle side of the top of the arch frame 5771, a threaded rod 5773 connected to the left output end of the second motor 5772, an internal thread block 5774 threadedly connected to the outer surface of the threaded rod 5773, a positioning plate 5775 connected to the outer surface of the internal thread block 5774, and two guide rods 5776 penetrating through the front and rear sides of the positioning plate 5775. The right bottom of the guide rod 5776 is fixed to the arch frame 5771 to limit and guide the positioning plate 5775 through the guide rod 5776. The bottom of the positioning plate 5775 is inserted and slides inside the top of the sheave 576. Under the action of the second motor 5772, the threaded rod 5773 rotates inside the internal thread block 5774, so that the internal thread block 5774 drives the positioning plate 5775 to move horizontally under the limiting action of the guide rod 5776, so as to drive the sheave 576 to move horizontally, and further move the collar 575 on the surface of the support rod 573.

[0046] When polishing the inside of the valve body 1, the polishing equipment is installed on the side of the clamping and positioning position of the valve body 1 through the bottom plate 51, and then the electric push rod 52 is controlled to start, so that the connecting head 53 drives the shaft rod 54 to move leftward inside the first gear 55. The shaft rod 54 drives the bracket 572 to move leftward on the slide bar 5722 through the rotating shaft column 571, so that the support rod 573 and the positioning rod 574 drive the rotating frame 579 and the polishing roller 5710 to move into the inside of the valve body 1. Then the first motor 510 is controlled to start. Through the first motor 510, the second gear 59 drives the first gear 55 to rotate inside the first support 56 and the second support 58. The first gear 55 drives the shaft rod 54 to rotate, so that the support rod 573 and the positioning rod 574 rotate, so that the polishing roller 5710 rotates inside the valve body 1, so as to perform polishing treatment through the contact between the polishing roller 5710 and the inner wall of the valve body 1. When the support rod 573 rotates, the collar 575 and the sheave 576 on its surface rotate synchronously, so that the bottom of the positioning plate 5775 is in sliding contact with the sheave 576; when polishing different positions inside the valve body 1, the second motor 5772 can be controlled to start. Under the action of the second motor 5772, the threaded rod 5773 rotates inside the internal thread block 5774, and the internal thread block 5774 drives the positioning plate 5775 to move horizontally under the limiting action of the guide rod 5776, so as to drive the sheave 576 to move horizontally, and further move the collar 575 on the surface of the support rod 573. The collar 575 drives the rotating frame 579 to rotate at an angle on the positioning rod 574 through the pull rod 578, so that the position of the polishing roller 5710 is adjusted and changed, so as to polish different positions inside the valve body 1.

[0047] The above are only the preferred examples of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or perform equivalent replacements for some of the technical features. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principle of the present invention shall be included within the protection scope of the present invention.

Claims

1. A high-pressure resistant valve casting, comprising a valve body (1), characterized in that: On the left and right sides inside the valve body (1), a transfer structure (2) and an extension structure (3) are respectively fastened by two positioning bolts (4). Reinforcing ribs are arranged at the arc inside the valve body (1), and a corrosion-resistant coating is sprayed inside the valve body (1). The transfer structure (2) includes a first inclined head pipe (21) installed on the left side inside the valve body (1), a second inclined head pipe (22) rotatably arranged on the left side of the first inclined head pipe (21), a first flange (23) integrally formed at the left end of the second inclined head pipe (22), a double-headed screw (24) penetrating through the side walls of the first inclined head pipe (21) and the second inclined head pipe (22), and nuts (25) threadedly connected to both ends of the double-headed screw (24). The right side of the outer surface of the first inclined head pipe (21) is connected to the positioning bolt (4). The connecting inclined surfaces of the first inclined head pipe (21) and the second inclined head pipe (22) are both 45 degrees. The extension structure (3) includes a first hollow threaded pipe (31) with its left side connected to the right side inside the valve body (1), a second hollow threaded pipe (32) arranged inside the right side of the first hollow threaded pipe (31), an internal threaded sleeve (33) threadedly connected to the threaded parts on the outer surfaces of the first hollow threaded pipe (31) and the second hollow threaded pipe (32), a cover cylinder (34) fastened to the outer surface of the internal threaded sleeve (33), and a second flange (35) fixedly connected to the right end of the second hollow threaded pipe (32). The left side of the outer surface of the first hollow threaded pipe (31) is connected to the positioning bolt (4). Slots (311) are opened on the front and rear sides inside the first hollow threaded pipe (31). An insertion cylinder (321) is arranged on the left side of the second hollow threaded pipe (32), and insertion bars (322) are arranged on the front and rear sides of the insertion cylinder (321). The insertion cylinder (321) is inserted and connected inside the first hollow threaded pipe (31), and the insertion bars (322) are located inside the slots (311).

2. The high-pressure resistant valve casting according to claim 1, wherein: A sealing rubber ring (211) is arranged at the inclined surface of the first inclined head pipe (21). The connections between the first inclined head pipe (21) and the second inclined head pipe (22) and the double-headed screw (24) are both provided with protrusions, and sealing blocks are arranged inside the protrusions.

3. The high-pressure resistant valve casting according to claim 1, wherein: The threads on the outer surfaces of the first hollow threaded pipe (31) and the second hollow threaded pipe (32) are arranged in opposite directions. Thread grooves with opposite spiral directions are respectively opened on the left and right sides inside the internal threaded sleeve (33), and the thread grooves on the left and right sides are respectively threadedly connected to the threaded parts on the outer surfaces of the first hollow threaded pipe (31) and the second hollow threaded pipe (32).

4. The processing method of a high-pressure resistant valve casting according to any one of claims 1-3, characterized in that: The processing method is as follows: S1. Use high-performance steel to cast and shape the valve body (1) with reinforcing ribs at the internal arc through a casting mold; S2. Insert a grinding device into the valve body (1) for grinding to make the inner wall of the valve body (1) smooth and free of burrs. Spray a corrosion-resistant coating inside the ground valve body (1) and perform a drying treatment; S3. Assemble the transfer structure (2) and the extension structure (3) on the left and right sides inside the valve body (1) processed in step S2 respectively, and lock and position them with the positioning bolts (4) to form a valve casting; The grinding device includes a bottom plate (51), an electric push rod (52) connected to the right side of the top of the bottom plate (51), a connector (53) rotatably connected to the left output shaft of the electric push rod (52), a shaft rod (54) rotatably arranged on the left side inside the connector (53), a first gear (55) wrapped around the left outer surface of the shaft rod (54), a first support (56) connected to the middle of the left side of the first gear (55), a grinding head structure (57) installed at the left end of the shaft rod (54), a second support (58) arranged at the middle of the right side of the first gear (55), a second gear (59) meshing with the rear side of the first gear (55), and a first motor (510) whose output shaft is connected to the middle of the inside of the second gear (59). The bottoms of the first support (56) and the second support (58) are both fixed to the bottom plate (51), the front side of the first motor (510) is fastened to the second support (58), a groove is formed in the middle of the top of the shaft rod (54), a clamping block is arranged on the upper middle side inside the first gear (55), and the clamping block is inserted and slid inside the groove. The bottom of the grinding head structure (57) is connected to the bottom plate (51).

5. The processing method of a high-pressure resistant valve casting according to claim 4, characterized in that: The grinding head structure (57) includes a rotating shaft column (571) connected to the shaft rod (54) at the middle of the right side, brackets (572) arranged on the front and rear sides of the rotating shaft column (571), a support rod (573) fixedly connected to the left end of the rotating shaft column (571), a positioning rod (574) integrally formed at the left end of the support rod (573), a collar (575) slidably connected to the outer surface of the support rod (573), a sheave (576) fixedly connected to the right outer surface of the collar (575), an adjustment component (577) slidably arranged on the inner side of the top of the sheave (576), a pull rod (578) rotatably connected to the left side of the top of the collar (575), a rotating frame (579) rotatably connected to the left end of the pull rod (578), and a grinding roller (5710) fastened to the bottom side of the front part of the rotating frame (579). The left end of the positioning rod (574) is rotatably connected to the rotating frame (579), and the bottom right side of the adjustment component (577) is fastened to the bracket (572).

6. The processing method of a high-pressure resistant valve casting according to claim 5, characterized in that: Two annular grooves (5711) are formed in the middle of the outer surface of the rotating shaft column (571). Two positioning insertion posts (5721) are arranged on both the front and rear sides of the bracket (572). The inner sides of the positioning insertion posts (5721) are arc-shaped, and the arc-shaped parts of the positioning insertion posts (5721) are inserted and connected to the inner sides of the annular grooves (5711). Slide bars (5722) are slidably arranged on both the front and rear sides of the bottom of the bracket (572), and the bottoms of the slide bars (5722) are fixed to the bottom plate (51).

7. The processing method of a high-pressure resistant valve casting according to claim 5, characterized in that: The position adjustment component (577) includes an arch frame (5771) fastened to the middle of the top side of the bracket (572), a second motor (5772) fastened to the middle side of the top of the arch frame (5771), a threaded rod (5773) connected to the left output end of the second motor (5772), an internal thread block (5774) threadedly connected to the outer surface of the threaded rod (5773), a positioning plate (5775) connected to the outer surface of the internal thread block (5774), and two guide rods (5776) penetrating through the front and rear sides of the positioning plate (5775). The bottom of the right side of the guide rod (5776) is fixed to the arch frame (5771), and the bottom of the positioning plate (5775) is inserted and slides inside the top of the sheave (576).

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