A grinding device for machining and producing a valve body of a petroleum machine

Abstract

The present application relates to valve body machining grinding technical field, specifically is related to a kind of grinding device for petroleum machinery valve body machining production, comprising: mounting head, along vertical direction mobile setting in the upper of mounting seat, valve body body is opened with the inner hole for mounting head to extend into, mounting head is cylindrical structure, spiral channel for cooling liquid to flow through is opened in the axis of mounting head in mounting head, spiral channel extends to from the upper portion of mounting head and goes out;Grinding part, for annular structure and along the axis of mounting head is sleeved in the periphery of mounting sleeve, for directly contacting with the inner hole wall of mounting head;Water supply unit, with spiral channel intercommunication, for cooling liquid to spiral channel supply;Annular cover, setting in the upper portion of mounting head, annular cover and mounting head synchronous rotation, annular cover and the upper portion between mounting head there is annular gap for cooling liquid to flow out.The present application improves cooling effect, reduces valve body inner circle sidewall tempering or appears microcrack phenomenon.

Description

Technical Field

[0001] This invention relates to the field of valve body machining and grinding technology, specifically to a grinding device for the machining and production of valve bodies for petroleum machinery. Background Technology

[0002] When grinding the valve body, both the inner and outer sides need to be ground. This is primarily done using a grinding head and coolant. While this method is technically mature for machining the outer side of the valve body, the following problems arise when machining the inner side, such as the inner circle: Firstly, the contact arc length of internal grinding is greater than that of external grinding, resulting in a faster rate of heat accumulation. As the processing time progresses, the temperature of the grinding head continuously increases, which not only easily leads to tempering or micro-cracks on the inner sidewall of the valve body, but also causes the grinding head to wear faster and the tool changing frequency to increase. Secondly, when the grinding head rotates at high speed, a centrifugal air barrier is formed on the outer periphery of the grinding wheel. The existing coolant arrangement mainly places the coolant pipe on one side of the grinding head (such as the micro blind hole grinding mechanism, grinding device and grinding method of oil inlet valve seat disclosed in Chinese Patent Publication No. CN107214577A, which is this arrangement), which makes it difficult for the coolant to reach the designated cooling position due to the obstruction of the centrifugal air barrier.

[0003] Ultimately, during the oil transportation process, the microcracks in the processed valve body will form corrosion channels, leading to early pitting, intergranular cracking, and sealing failure on the inner circle of the valve body. Summary of the Invention

[0004] To address the aforementioned issues, a grinding device for processing valve bodies in petroleum machinery is provided. Through the cooperation of a water supply unit, a spiral channel, and an annular cover, coolant can flow along the spiral channel and initially cool the inner annular side of the grinding section, alleviating the problem of excessive heat accumulation during inner circular grinding, reducing the occurrence of tempering or micro-cracks on the inner circular sidewall of the valve body, and simultaneously slowing down the wear rate of the grinding section and reducing the tool change frequency. The annular gap formed by the annular cover and the upper part of the mounting head allows coolant to cover the outer side of the grinding section and the inner circular hole sidewall under the action of centrifugal force, achieving cooling of the outside of the grinding section, further improving the cooling effect, and reducing early pitting corrosion, intergranular cracking, and sealing surface failure on the inner circular side of the valve body.

[0005] To address the problems of existing technologies, this invention provides a grinding device for the processing and production of valve bodies in petroleum machinery, comprising a mounting base for mounting the valve body and a grinding unit; the grinding unit includes: a mounting head, vertically movable above the mounting base, with an inner circular hole on the valve body for the mounting head to extend into; the mounting head is cylindrical, and a spiral channel for coolant flow is formed along the axis of the mounting head, extending upward to exit from the upper part of the mounting head; a grinding section, an annular structure fitted around the mounting head along its axis, for direct contact with the inner circular hole wall of the valve body; a water supply unit, connected to the spiral channel, for supplying coolant to the spiral channel; and an annular cover, positioned on the upper part of the mounting head, rotating synchronously with the mounting head, with an annular gap between the annular cover and the upper part of the grinding section for coolant outflow.

[0006] Preferably, a collecting groove is formed on the upper end face of the mounting head along the axis of the mounting head. The collecting groove is annular and communicates with the spiral channel.

[0007] Preferably, the grinding section has: a transfer groove, which is opened at the upper end of the grinding section parallel to the axis of the grinding section, and the vertical projection of the transfer groove is located within the vertical projection of the annular cover; and an outlet groove, which is opened on the side wall of the grinding section along the radial direction of the grinding section and communicates with the transfer groove.

[0008] Preferably, an annular groove is formed on the side wall of the grinding part along the axis of the grinding part, and the annular groove communicates with the outflow groove.

[0009] Preferably, the bottom of the mounting head has a mounting hole along the axis of the mounting head, the bottom of the grinding part has a base plate horizontally provided, and the base plate has a through hole extending along the extension direction of the mounting hole. The grinding unit also includes a bolt, which passes through the through hole and is threaded into the mounting hole.

[0010] Preferably, a limit block is vertically provided on the side wall of the mounting head, and a limit groove is vertically provided on the inner ring side wall of the grinding part, with the limit block and the limit groove being inserted into each other.

[0011] Preferably, the lower part of the base plate is provided with a protective cover to cover the bolts.

[0012] Preferably, the water supply unit includes: a connecting rod, which is disposed on the upper part of the mounting head along the axis of the mounting head, and the connecting rod rotates around its own axis, and the mounting head rotates synchronously with the connecting rod; and a water supply tank, which extends from the connecting rod into the mounting head along the axis of the mounting head, and the water supply tank is connected to the spiral channel.

[0013] Preferably, the water supply unit further includes: a water passage hole, which is horizontally opened on the side wall of the connecting rod; a ring sleeve, which is rotatably sleeved around the connecting rod along the axis of the connecting rod and forms an annular water supply cavity with the connecting rod, the annular water supply cavity being connected to the water supply tank through the water passage hole, and a pump body being connected to the outside of the annular water supply cavity.

[0014] Preferably, the mounting base is provided with a pair of limiting claws for clamping the two sides of the valve body.

[0015] The advantages of this invention compared to the prior art are: 1. This invention, through the cooperation of the water supply unit, spiral channel, and annular cover, allows the coolant to flow along the spiral channel and initially cool the inner ring side of the grinding section, alleviating the problem of excessive heat accumulation during inner grinding, reducing the occurrence of tempering or micro-cracks on the inner ring sidewall of the valve body, and simultaneously slowing down the wear rate of the grinding section and reducing the tool change frequency. The annular gap formed by the annular cover and the upper part of the mounting head allows the coolant to cover the outer side of the grinding section and the inner ring hole sidewall under the action of centrifugal force, achieving cooling of the outside of the grinding section, further improving the cooling effect, reducing early pitting corrosion, intergranular cracking, and sealing surface failure in the inner ring of the valve body, and ensuring the stability of the valve body in oil transportation.

[0016] 2. Through the synergistic effect of the collecting groove, transfer groove, outflow groove and annular groove, the coolant can be evenly collected and diverted, precisely acting on the inside of the grinding section and the grinding contact area, further improving the cooling effect, reducing the wear of the grinding section and the occurrence rate of valve body defects; the annular groove divides the traditional grinding end face into multiple smaller grinding end faces, reducing the size of a single grinding end face, reducing heat accumulation, improving the processing quality of the valve body, extending the service life of the valve body, and optimizing the coolant distribution to alleviate the problem of uneven heat dissipation.

[0017] 3. The threaded engagement of bolts with mounting holes and the insertion engagement of limit blocks with limit slots enable convenient installation and replacement of the grinding unit, improve the installation stability of the grinding unit, avoid relative rotation or offset during grinding, and ensure grinding accuracy; the protective cover can reduce the corrosion of bolts by coolant, extend the service life of bolts, and reduce the maintenance cost of the device. Attached Figure Description

[0018] Figure 1 This is a three-dimensional schematic diagram of a grinding device for the processing and production of valve bodies for petroleum machinery according to the present invention.

[0019] Figure 2 This is a three-dimensional schematic diagram of the valve body when it is first placed in a grinding device for processing and producing valve bodies for petroleum machinery, according to the present invention.

[0020] Figure 3 This is a three-dimensional schematic diagram of the limiting gripper holding and positioning the valve body in a grinding device for processing and producing valve bodies of petroleum machinery according to the present invention.

[0021] Figure 4 This is a cross-sectional three-dimensional schematic diagram of the valve body after being clamped and positioned by the limiting gripper in a grinding device for processing and producing valve bodies of petroleum machinery according to the present invention.

[0022] Figure 5 yes Figure 4 A magnified view of a portion of point A in the middle.

[0023] Figure 6 yes Figure 4 A magnified view of a portion of point B in the middle.

[0024] Figure 7 This is a side view of the grinding unit in a grinding device for processing and producing valve bodies for petroleum machinery, as described in this invention, when it begins grinding the inner circular hole in the valve body.

[0025] Figure 8 yes Figure 7 The section view at CC is used.

[0026] Figure 9 yes Figure 8 A magnified view of a portion of point D.

[0027] Figure 10 This is a three-dimensional schematic diagram of the protective cover being removed from a grinding device used in the production of valve bodies for petroleum machinery according to the present invention.

[0028] Figure 11 This is a partial cross-sectional three-dimensional schematic diagram of the grinding part and bolts after being disassembled in sequence in a grinding device for processing and producing valve bodies of petroleum machinery according to the present invention.

[0029] The following are the labels in the diagram: 1. Mounting base; 11. Limiting gripper; 2. Grinding unit; 21. Mounting head; 211. Spiral channel; 212. Collection groove; 213. Mounting hole; 214. Limiting block; 22. Grinding section; 221. Transfer groove; 222. Outflow groove; 223. Annular groove; 224. Base plate; 225. Through hole; 226. Limiting groove; 23. Water supply unit; 231. Connecting rod; 2311. Water passage hole; 232. Water supply groove; 233. Ring sleeve; 24. Annular cover; 25. Bolt; 26. Protective cover; 27. Rotary actuator; 28. Linear actuator; 3. Valve body; 31. Inner hole. Detailed Implementation

[0030] To further understand the features, technical means, and specific objectives and functions achieved by the present invention, the present invention will be described in further detail below with reference to the accompanying drawings and specific embodiments.

[0031] Reference Figures 1 to 5 , Figure 7 and Figure 8A grinding device for processing valve bodies in petroleum machinery includes a mounting base 1 for mounting a valve body 3 and a grinding unit 2. The device is vertically movable above the mounting base 1. The valve body 3 has an inner circular hole 31 for a mounting head 21 to extend into. The mounting head 21 is cylindrical, and a spiral channel 211 for coolant flow is formed along its axis inside the mounting head 21. The spiral channel 211 extends upwards and exits from the upper part of the mounting head 21. A grinding part 22, an annular structure, is sleeved around the mounting head 21 along its axis and is used to directly contact the wall of the inner circular hole 31 of the valve body 3. A water supply unit 23 communicates with the spiral channel 211 and supplies coolant to the spiral channel 211. An annular cover 24 is disposed on the upper part of the mounting head 21 and rotates synchronously with the mounting head 21. An annular gap exists between the annular cover 24 and the upper part of the grinding part 22 for coolant to flow out.

[0032] The mounting head 21 is made of thermally conductive material.

[0033] A connecting rod 231 is provided on the upper part of the mounting head 21. The mounting head 21 can rotate synchronously with the connecting rod 231. A rotary driver 27 for driving the connecting rod 231 to rotate is provided on the upper end of the connecting rod 231. The output end of the rotary driver 27 is connected to the upper end of the connecting rod 231. A linear driver 28 for driving the rotary driver 27 and the connecting rod 231 to move synchronously is provided on the upper part of the rotary driver 27. A two-dimensional moving platform for driving the linear driver 28 to move arbitrarily in the horizontal plane is provided on one side of the linear driver 28.

[0034] When grinding the valve body 3 using this grinding device, the valve body 3 is first installed on the mounting base 1. The limiting jaws 11 clamp the valve body 3 on both sides to prevent it from tilting or slipping during the grinding process. Then, the grinding unit 2 is started, and the two-dimensional moving platform drives the linear actuator 28 to move to the preset position. At the same time, the rotary actuator 27 drives the connecting rod 231 to rotate. The linear actuator 28 drives the mounting head 21 to descend through the connecting rod 231, so that the mounting head 21 extends into the inner circular hole 31 of the valve body 3. At this time, the water supply unit 23 is started, supplying coolant to the spiral channel 211. The coolant flows upward through the spiral channel 211 and flows out from the top of the mounting head 21, entering the gap between the annular cover 24 and the top of the mounting head 21. During the grinding process, the mounting head 21 rotates synchronously with the rotary driver 27, which in turn drives the annular cover 24 to rotate synchronously. Under the action of centrifugal force, the coolant is thrown out from the annular gap. Part of the coolant covers the outside of the grinding part 22, thereby cooling the outside of the grinding part 22 and the side wall of the inner circular hole 31. The other part of the coolant, under the restriction of the annular cover 24, further acts on the relevant area of ​​the grinding part 22 to assist in cooling.

[0035] The cooperation between the spiral channel 211 and the water supply unit 23 allows the coolant to flow along the spiral channel 211 and provide initial cooling to the inner ring side of the grinding section 22. This alleviates the problem of rapid heat accumulation during inner grinding, reduces the phenomenon of tempering or micro-cracks on the inner ring sidewall of the valve body caused by excessively rapid temperature rise of the grinding head, and also slows down the wear rate of the grinding section 22 to a certain extent, reducing the tool change frequency. At the same time, the annular gap formed by the annular cover 24 and the upper part of the mounting head 21 allows the coolant to be discharged to the outer side of the grinding section 22 and the sidewall of the inner ring hole 31 under the action of centrifugal force, achieving external cooling of the grinding section 22, further improving the cooling effect of the coolant, reducing the early pitting corrosion, intergranular cracking and sealing surface failure of the inner ring of the valve body caused by insufficient cooling, ensuring the stability of the valve body during oil transportation. In addition, the grinding section 22 can be easily replaced, reducing the maintenance cost and operation difficulty of the device.

[0036] Reference Figure 5 A collecting groove 212 is provided on the upper end face of the mounting head 21 along the axis of the mounting head 21. The collecting groove 212 is annular and is connected to the spiral channel 211.

[0037] The water supply unit 23 supplies coolant to the spiral channel 211. The coolant flows upward along the spiral channel 211 and eventually flows into the annular collecting groove 212 on the upper end face of the mounting head 21. The collecting groove 212 concentrates the coolant, preventing the coolant from flowing out of the spiral channel 211 and only being distributed in a local area on the upper part of the mounting head 21. It can evenly collect the coolant discharged from the spiral channel 211, making it easier for the coolant to disperse to the upper periphery of the mounting head 21 under the action of centrifugal force, reducing uneven heat dissipation, further improving the cooling effect of the coolant on the grinding part 22 and the inner circular hole 31, and alleviating the problem of excessive heat accumulation during inner circular grinding.

[0038] Reference Figure 5 The grinding section 22 is provided with: a transfer groove 221, which is opened at the upper end of the grinding section 22 parallel to the axis of the grinding section 22, and the vertical projection of the transfer groove 221 is located within the vertical projection of the annular cover 24; and an outlet groove 222, which is opened on the side wall of the grinding section 22 along the radial direction of the grinding section 22 and communicates with the transfer groove 221.

[0039] The coolant in the collecting tank 212 is dispersed in all directions under the action of centrifugal force. Under the restriction of the annular cover 24, part of the coolant is discharged through the gap between the annular cover 24 and the grinding part 22, and the other part of the coolant enters the transfer tank 221 at the upper end of the grinding part 22. After being transferred through the transfer tank 221, it is discharged through the outflow tank 222 on the side wall of the grinding part 22, thus realizing the diversion and guidance of the coolant.

[0040] The combination of the transfer tank 221 and the outflow tank 222 can divert and guide the coolant, allowing some of the coolant to act precisely inside the grinding section 22, further improving the cooling effect on the grinding section 22. At the same time, it can deliver the coolant to the grinding area where the grinding section 22 is in direct contact with the inner circular hole 31, helping to reduce the heat generated in the grinding area during the grinding process, reducing the possibility of wear on the grinding section 22 and the occurrence of defects such as tempering and micro-cracks on the inner circular sidewall of the valve body, and indirectly improving the performance of the valve body after processing.

[0041] Reference Figure 5 An annular groove 223 is provided on the side wall of the grinding part 22 along the axis of the grinding part 22, and the annular groove 223 is connected to the outflow groove 222.

[0042] The coolant discharged from the outlet 222 flows into the annular groove 223 on the side wall of the grinding part 22. When the coolant flows out at the contact position between the grinding part 22 and the inner hole 31, the grinding position can be precisely cooled. When the coolant flows out at the position where the grinding part 22 is not in contact with the inner hole 31, the coolant is thrown out onto the side wall of the inner hole 31 under the action of centrifugal force, thereby cooling the side wall of the inner hole 31.

[0043] The annular groove 223 divides the traditional grinding end face into multiple smaller grinding end faces, reducing the size of a single grinding end face and reducing heat accumulation caused by the grinding contact area. At the same time, the coolant in the annular groove 223 provides targeted cooling to the grinding end face and the side wall of the inner circular hole 31, further alleviating the heat accumulation problem, reducing early pitting and intergranular cracking in the inner circle of the valve body, improving the processing quality of the valve body, and extending the service life of the valve body in the oil transportation process.

[0044] Reference Figures 9 to 11 The bottom of the mounting head 21 has a mounting hole 213 along the axis of the mounting head 21. The bottom of the grinding part 22 has a horizontal base plate 224. The base plate 224 has a through hole 225 extending along the extension direction of the mounting hole 213. The grinding unit 2 also includes a bolt 25, which passes through the through hole 225 and is threaded into the mounting hole 213.

[0045] A through hole 225 is provided on the bottom plate 224 at the bottom of the grinding part 22. After the bolt 25 passes through the through hole 225, it engages with the mounting hole 213 at the bottom of the mounting head 21 to achieve a fixed connection between the grinding part 22 and the mounting head 21.

[0046] The installation and removal of the grinding section 22 can be easily achieved by the threaded engagement of the bolt 25 with the mounting hole 213. When the grinding section 22 is worn, the replacement operation can be completed quickly, reducing the maintenance difficulty and operating cost of the device.

[0047] Reference Figure 11A limit block 214 is vertically provided on the side wall of the mounting head 21, and a limit groove 226 is vertically provided on the inner ring side wall of the grinding part 22. The limit block 214 and the limit groove 226 are inserted and engaged.

[0048] The limiting block 214 on the side wall of the mounting head 21 is engaged with the limiting groove 226 on the inner ring side wall of the grinding part 22. During the installation of the grinding part 22, the circumferential positioning of the grinding part 22 is achieved through the engagement of the limiting block 214 and the limiting groove 226, which restricts the relative rotation between the grinding part 22 and the mounting head 21. This prevents the grinding part 22 from rotating relative to the mounting head 21 during rotation, avoids the decrease in grinding accuracy caused by relative rotation, improves the stability of the installation of the grinding part 22, reduces the processing error caused by the offset of the grinding part 22 during the grinding process, ensures the smooth progress of the grinding operation, and improves the pass rate of valve body processing.

[0049] Reference Figure 5 and Figure 9 The lower part of the base plate 224 is provided with a protective cover 26 to cover the bolts 25.

[0050] The protective cover 26 at the bottom of the base plate 224 is snapped into the base plate 224 to cover the bolt 25, preventing the coolant from directly contacting the bolt 25, reducing the possibility of the bolt 25 being corroded, extending the service life of the bolt 25, reducing the maintenance cost and replacement frequency of the device due to the corrosion of the bolt 25, and at the same time, the snap-fit ​​method facilitates the installation and removal of the protective cover 26, making it convenient for subsequent maintenance and replacement of the bolt 25 and the grinding part 22, and improving the maintenance convenience of the device.

[0051] Reference Figure 5 and Figure 6 The water supply unit 23 includes: a connecting rod 231, which is disposed on the upper part of the mounting head 21 along the axis of the mounting head 21. The connecting rod 231 rotates around its own axis, and the mounting head 21 rotates synchronously with the connecting rod 231; and a water supply tank 232, which extends from the connecting rod 231 into the mounting head 21 along the axis of the mounting head 21. The water supply tank 232 is connected to the spiral channel 211.

[0052] The connecting rod 231 of the water supply unit 23 is set on the upper part of the mounting head 21 along the axis of the mounting head 21 and rotates around its own axis. The mounting head 21 rotates synchronously with the connecting rod 231. The water supply tank 232 extends along the connecting rod 231 into the interior of the mounting head 21 and communicates with the spiral channel 211. The coolant flows into the spiral channel 211 through the water supply tank 232, providing a continuous coolant supply for the grinding process and avoiding insufficient cooling due to interruption of coolant supply. At the same time, the connecting rod 231 drives the mounting head 21 to rotate synchronously, ensuring the synchronization of grinding operation and coolant supply, improving the stability of cooling effect, and ensuring the continuous operation of grinding.

[0053] Reference Figure 6 The water supply unit 23 also includes: a water passage hole 2311, which is horizontally opened on the side wall of the connecting rod 231; a ring sleeve 233, which is rotatably sleeved on the periphery of the connecting rod 231 along the axis of the connecting rod 231 and forms an annular water supply cavity with the connecting rod 231. The annular water supply cavity is connected to the water supply tank 232 through the water passage hole 2311, and a pump body is connected to the outside of the annular water supply cavity.

[0054] The ring sleeve 233 is rotatably sleeved around the connecting rod 231 to form an annular water supply cavity. The annular water supply cavity is connected to the water supply tank 232 through the water passage hole 2311 on the side wall of the connecting rod 231. The annular water supply cavity is connected to the pump body. The ring sleeve 233 remains stationary. When the connecting rod 231 rotates, it rotates relative to the ring sleeve 233 to achieve stable delivery of coolant. At the same time, the structure of the stationary ring sleeve 233 and the rotating connecting rod 231 can avoid problems such as pipe entanglement in the water supply unit 23 due to the rotation of the connecting rod 231, improve the reliability of the device operation, and reduce the failure rate of the device.

[0055] Reference Figure 2 and Figure 3 The mounting base 1 is provided with a pair of limiting claws 11 for clamping the two sides of the valve body 3.

[0056] After the valve body 3 is installed on the mounting base 1, the valve body 3 is clamped on both sides by a pair of limiting claws 11 on the mounting base 1, which restricts the displacement and rotation of the valve body 3 and ensures that the valve body 3 remains stable during the grinding process.

[0057] Working principle: When using this grinding device to grind the valve body 3, first install the valve body 3 onto the mounting base 1, and clamp both sides of the valve body 3 by the limiting jaws 11 to prevent the valve body 3 from tilting or slipping during the subsequent grinding process.

[0058] Subsequently, the grinding unit 2 is started, and the two-dimensional moving platform moves the linear driver 28 to the preset position. At the same time, the rotary driver 27 drives the connecting rod 231 to rotate. The linear driver 28 drives the mounting head 21 to descend into the inner circular hole 31 of the valve body 3 through the connecting rod 231. At this time, the pump body is started and supplies water to the annular water supply chamber. The coolant enters the water supply tank 232 through the annular water supply chamber and the water passage 2311. Under the guidance of the water supply tank 232, the coolant flows to the bottom of the water supply tank 232 and then enters the spiral channel 211. Then, it enters the collecting tank 212 from the upper part of the spiral channel 211. The coolant collected in the collecting tank 212 is thrown out under the action of centrifugal force. However, under the restriction of the annular cover 24, part of the coolant is discharged from the annular gap between the annular cover 24 and the grinding part 22, and the other part of the coolant is discharged from the outlet tank 222 through the transfer tank 221. The coolant discharged through the outlet tank 222 enters the annular groove 223 during the grinding process and is finally discharged.

[0059] During the grinding process, when the coolant passes through the spiral channel 211, the coolant in the spiral channel 211 can initially cool the inner ring side of the grinding part 22 because the mounting head 21 is made of thermally conductive material. After absorbing heat, the coolant is discharged through the upper part of the spiral channel 211 and flows into the collecting groove 212. The collecting groove 212 can initially collect the coolant discharged through the spiral channel 211. Otherwise, when the coolant is discharged from the spiral channel 211, it will only be located in a local position on the upper part of the mounting head 21, which will cause the coolant discharged through the spiral channel 211 to not be evenly distributed to the upper part of the mounting head 21, resulting in uneven heat dissipation.

[0060] After being collected in the collection tank 212, the coolant is dispersed around the mounting head 21 under the action of centrifugal force. A portion of the dispersed coolant overflows from the annular gap between the annular cover 24 and the grinding part 22. The overflowing coolant covers the entire outer side of the grinding part 22 from top to bottom, and at the same time cools the inner hole 31, thus achieving cooling of the outer side of the grinding part 22 and the side wall of the inner hole 31.

[0061] Since the amount of coolant overflowing from the annular gap per unit time is limited, another portion of the coolant is transferred through the transfer tank 221 and then flows out through the outlet tank 222. The coolant flowing into the transfer tank 221 and the outlet tank 222 can cool the inside of the grinding section 22, while the coolant flowing out through the outlet tank 222 enters the annular groove 223. There are two situations when the coolant flows out into the annular groove 223: First, the coolant flows out at the contact position between the grinding section 22 and the inner circular hole 31, in which case the coolant can cool the area being ground. By setting multiple annular grooves 223, the coolant can cool the area being ground. Traditional grinding end faces are divided into multiple grinding end faces. The traditional grinding end face refers to the contact end face formed when the grinding part 22 contacts the inner circular hole 31. There is an annular groove 223 between two adjacent grinding end faces. By reducing the size of the grinding end face and cooling it through the coolant in the annular groove 223 on both sides of the grinding end face, the cooling effect of the grinding end face during the grinding process is achieved. Secondly, the coolant flows out at the position where the grinding part 22 does not contact the inner circular hole 31. The coolant is directly thrown out onto the side wall of the inner circular hole 31 under the action of centrifugal force, thereby cooling the inner circular hole 31.

[0062] After a period of use, the grinding part 22 will wear out and needs to be replaced. When replacing it, unscrew the bolt 25, remove the worn grinding part 22 and the matching base plate 224 together, and replace it with a new grinding part 22. After the replacement is completed, the protective cover 26 should be placed on the outside of the bolt 25 to prevent the coolant from corroding the bolt 25.

[0063] The above embodiments only illustrate one or more implementations of the present invention, and their descriptions are relatively specific and detailed, but they should not be construed as limiting the scope of protection of the present invention. It should be noted that those skilled in the art can make various modifications and improvements without departing from the concept of the present invention, and these all fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the appended claims.

Claims

1. A grinding device for processing valve bodies in petroleum machinery, comprising a mounting base (1) for mounting a valve body body (3) and a grinding unit (2). Its features are, The grinding unit (2) includes: The mounting head (21) is vertically positioned above the mounting base (1). The valve body (3) has an inner circular hole (31) for the mounting head (21) to extend into. The mounting head (21) is cylindrical. A spiral channel (211) for coolant to flow through is provided inside the mounting head (21) along its axis. The spiral channel (211) extends upward to exit from the upper part of the mounting head (21). The grinding part (22) is a ring structure and is sleeved around the mounting head (21) along the axis of the mounting head (21) for direct contact with the inner circular hole (31) wall of the valve body body (3); A water supply unit (23) is connected to the spiral channel (211) and is used to supply coolant to the spiral channel (211); An annular cover (24) is disposed on the upper part of the mounting head (21). The annular cover (24) rotates synchronously with the mounting head (21). There is an annular gap between the annular cover (24) and the upper part of the grinding part (22) for coolant to flow out.

2. The grinding device for processing valve bodies in petroleum machinery according to claim 1, characterized in that, A collecting groove (212) is provided on the upper end face of the mounting head (21) along the axis of the mounting head (21). The collecting groove (212) is annular and communicates with the spiral channel (211).

3. A grinding device for processing valve bodies in petroleum machinery according to claim 2, characterized in that, The grinding part (22) has the following openings: A transfer groove (221) is formed at the upper end of the grinding part (22) parallel to the axis of the grinding part (22), and the vertical projection of the transfer groove (221) is located within the vertical projection of the annular cover (24). The outflow groove (222) is formed on the side wall of the grinding part (22) along the radial direction of the grinding part (22) and communicates with the transfer groove (221).

4. A grinding device for processing valve bodies in petroleum machinery according to claim 3, characterized in that, An annular groove (223) is provided on the side wall of the grinding part (22) along the axis of the grinding part (22), and the annular groove (223) is connected to the outflow groove (222).

5. A grinding device for processing valve bodies in petroleum machinery according to claim 1, characterized in that, The bottom of the mounting head (21) is provided with a mounting hole (213) along the axis of the mounting head (21). The bottom of the grinding part (22) is provided with a base plate (224) horizontally. A through hole (225) is provided on the base plate (224) along the extension direction of the mounting hole (213). The grinding unit (2) also includes a bolt (25). The bolt (25) passes through the through hole (225) and is threaded into the mounting hole (213).

6. A grinding device for processing valve bodies in petroleum machinery according to claim 5, characterized in that, A limiting block (214) is vertically provided on the side wall of the mounting head (21), and a limiting groove (226) is vertically provided on the inner ring side wall of the grinding part (22). The limiting block (214) and the limiting groove (226) are inserted into each other.

7. A grinding device for processing valve bodies in petroleum machinery according to claim 5, characterized in that, The lower part of the base plate (224) is provided with a protective cover (26) covering the bolt (25).

8. A grinding device for processing valve bodies in petroleum machinery according to claim 1, characterized in that, The water supply unit (23) includes: A connecting rod (231) is disposed on the upper part of the mounting head (21) along the axis of the mounting head (21). The connecting rod (231) rotates around its own axis, and the mounting head (21) rotates synchronously with the connecting rod (231). A water supply tank (232) extends from the connecting rod (231) along the axis of the mounting head (21) into the mounting head (21), and the water supply tank (232) communicates with the spiral channel (211).

9. A grinding device for processing valve bodies in petroleum machinery according to claim 8, characterized in that, The water supply unit (23) also includes: A water passage hole (2311) is horizontally opened on the side wall of the connecting rod (231); A ring sleeve (233) is rotatably sleeved around the connecting rod (231) along the axis of the connecting rod (231) and forms an annular water supply cavity with the connecting rod (231). The annular water supply cavity is connected to the water supply tank (232) through the water passage hole (2311). A pump body is connected to the outside of the annular water supply cavity.

10. A grinding device for processing valve bodies in petroleum machinery according to claim 1, characterized in that, The mounting base (1) is provided with a pair of limiting claws (11) for clamping the two sides of the valve body (3).

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