Double-sided valve body grinding machine

Abstract

The utility model discloses a double-face valve body grinding machine which comprises a grinding machine body, the grinding machine body comprises a machine cabinet and polishing mechanisms, the polishing mechanisms are arranged on the rear side of the interior of the machine cabinet, the middle of the machine cabinet is provided with a feeding port corresponding to the polishing mechanisms, and the two polishing mechanisms are symmetrically arranged. Each polishing mechanism comprises a driving wheel, a driven wheel, a telescopic adjusting device, an abrasive belt tensioning device and a polishing abrasive belt, the two driven wheels, the driving wheels and the tensioning wheels enable the polishing abrasive belts to be arranged in a trapezoid shape, the abrasive belt tensioning devices are arranged on the inner sides of the abrasive belts, and the movable ends of the abrasive belt tensioning devices are connected with the polishing abrasive belts in a floating mode. A feeding rail is horizontally arranged on the front side of the machine cabinet and corresponds to the feeding port, a feeding mechanism is arranged in the feeding port and corresponds to the two polishing mechanisms, and a double-face electromagnetic valve body is movably arranged on the upper portion of the feeding mechanism. According to the utility model, the polishing trace of the polishing wheel is eliminated, and the overall polishing effect is improved. The polishing device is simple in structure and convenient to use and maintain, and the polishing and grinding efficiency is greatly improved.

Description

Technical Field

[0001] The utility model relates to the technical field of grinding machines, in particular to a double-sided valve body grinding machine. Background Art

[0002] A grinding machine is a machining equipment for mechanically treating the surface of workpieces made of metal materials to obtain the required surface finish.

[0003] When processing solenoid valves, it is necessary to perform surface treatments such as spraying or electroplating on the valve body. Before the surface treatment, it is necessary to grind and polish the valve body to remove burrs and improve the surface finish.

[0004] The traditional valve body grinding and polishing process requires multiple grinding machines, and each grinding machine only grinds one surface, resulting in a large floor area in the workshop, a large number of operators, and high production and manufacturing costs.

[0005] Currently, double-sided grinding machines also appear on the market. However, the existing double-sided grinding machines are large in size, complex and heavy in structure, inconvenient to move and use, and require a large amount of time for machine adjustment and maintenance. The existing double-sided grinding machines mainly grind through two correspondingly arranged polishing wheels, and manually control the feed rate to achieve the gradual processing of the workpiece to be processed from rough grinding to fine grinding. This grinding and polishing method is very difficult to grind the sealing surface, curved surface, groove edges and corners of the valve body, and has a large grinding work intensity, is time-consuming and laborious, with low grinding and polishing efficiency and high costs.

[0006] Therefore, it is urgent for engineering and technical personnel in this field to develop a double-sided valve body grinding machine with a simple structure, convenient use, high automation degree, high grinding efficiency, good grinding effect and low cost to meet the current production needs. Summary of the Utility Model

[0007] The technical problem to be solved by the utility model is to provide a double-sided valve body grinding machine with a simple structure, small size, convenient use, high automation degree, high grinding efficiency, good grinding effect and low use cost.

[0008] To solve the above technical problem, the technical solution of the utility model is as follows:

[0009] A double-sided valve body grinding machine, comprising: a grinding machine main body, the grinding machine main body includes a cabinet and a polishing mechanism, the polishing mechanism is arranged at the rear side inside the cabinet, a feeding port is arranged corresponding to the polishing mechanism in the middle of the cabinet, the polishing mechanism is in two groups, and the two groups of polishing mechanisms are respectively movably connected to a frame arranged inside the cabinet through corresponding supports, a manual distance adjustment device is arranged corresponding to the outside of the support, the two groups of polishing mechanisms are symmetrically arranged, and the two groups of polishing mechanisms both include a driving wheel, a driven wheel, a telescopic adjustment device, a sand belt tensioning device and a polishing sand belt, the telescopic adjustment device includes a tensioning wheel and an adjustment mechanism movably arranged below the tensioning wheel, the polishing sand belt is movably arranged outside the driving wheel, the tensioning wheel and the driven wheel, wherein, there are two driven wheels, and the two driven wheels, the driving wheel and the tensioning wheel make the polishing sand belt arranged in a trapezoid shape, the sand belt tensioning device is movably arranged inside the polishing sand belt, and the movable end of the sand belt tensioning device is floatingly connected to the polishing sand belt, a feeding track is horizontally arranged corresponding to the feeding port at the front side of the cabinet, a feeding mechanism is arranged in the feeding port corresponding to the two groups of polishing mechanisms, and a double-sided solenoid valve body is movably arranged at the upper part of the feeding mechanism.

[0010] In the above structure, the feeding mechanism is arranged corresponding to the feeding port, the feeding mechanism includes a first slide rail, a slide seat, a valve body fixing frame and a first cylinder, the first slide rail is horizontally arranged, the slide seat is movably arranged on the first slide rail, the valve body fixing frame is vertically arranged on the upper part of the slide seat, clamping grooves for installing the double-sided solenoid valve body are embedded on both sides of the valve body fixing frame, and the first cylinder is arranged corresponding to the first slide rail and is movably connected to the slide seat.

[0011] In the above structure, a U-shaped bracket is arranged below the tensioning wheel, the tensioning wheel is movably connected to the adjustment mechanism through the U-shaped bracket, the adjustment mechanism includes a manual adjustment mechanism and an electric adjustment mechanism, the manual adjustment mechanism is arranged outside the U-shaped bracket, and the electric adjustment mechanism is movably connected to the corresponding support through a right-angle fixing seat arranged.

[0012] In the above structure, the U-shaped bracket includes a front support plate, a rear support plate and a cross support plate which are integrally arranged, a sleeve is vertically arranged at the lower part of the cross support plate, U-shaped clamping grooves matching with the rotating shaft of the tensioning wheel are embedded in the upper parts of the front support plate and the rear support plate, a limiting plate is arranged outside the front support plate, the manual adjustment mechanism is located below the limiting plate and is adjustably connected to the rotating shaft, a balance rod is horizontally arranged at the lower end of the rear support plate, and the free end of the balance rod is movably connected to a balance cylinder arranged at the rear side of the corresponding support.

[0013] In the above structure, the electric adjustment mechanism includes an adjustment motor, a floating flange, and a fine adjustment device. The output end of the adjustment motor is movably connected to the sleeve. The floating flange is movably arranged outside the output end and the sleeve. The fine adjustment device is electrically connected to the adjustment motor, and the adjustment motor is a servo motor.

[0014] In the above structure, the sand belt tensioning device includes a fixing plate, a sliding plate, and a top plate. The top plate is arranged at one end of the sliding plate and is close to the two driven wheels. The fixing plate is vertically arranged on the front side of the support. The sliding plate is arranged parallel to the fixing plate, and the sliding plate is movably connected to the fixing plate through a sliding mechanism arranged correspondingly on the inner side.

[0015] In the above structure, a U-shaped clearance groove is provided through one end of the fixing plate. A second cylinder is provided on one side of the fixing plate adjacent to the sliding plate. An L-shaped bracket is provided on the upper part of the fixing plate. The second cylinder is movably connected to the fixing plate through the L-shaped bracket. A receiving groove is provided through the middle of the sliding plate. A space for the movement of the second cylinder is provided in the receiving groove. The telescopic rod of the second cylinder is movably connected to the sliding plate through a connecting device arranged correspondingly on the front side of the receiving groove.

[0016] In the above structure, a connecting plate is provided at the front end of the sliding plate. The top plate is movably connected to the sliding plate through the connecting plate. The top plate is made of a flexible wear-resistant material.

[0017] In the above structure, a driving motor is provided corresponding to the driving wheel at the lower part inside the cabinet, and the driving wheel is movably connected to the driving motor.

[0018] In the above structure, a main control device is further included, and the main control device is electrically connected to the driving motor, the telescopic adjustment device, the sand belt tensioning device, the fine adjustment device, the feeding mechanism, and the feeding track respectively.

[0019] The beneficial effects of the present utility model are as follows:

[0020] The utility model adopts two groups of symmetrically arranged polishing mechanisms. The valve body to be polished is placed in a special fixture and automatically fed between two polishing abrasive belts for simultaneous polishing, significantly improving the working efficiency and quality of the grinding machine, reducing the human error rate. During operation, the telescopic adjustment device enables the polishing abrasive belt to move within a set range through an adjustment mechanism, automatically adjusting the height to keep the same friction force between the workpiece and the abrasive belt, perfectly fitting the surface of the workpiece, and avoiding over-polishing or incomplete polishing caused by the up-and-down undulation of the workpiece surface, which drives the polishing abrasive belt and makes the polishing abrasive belt move horizontally along the axis, thus eliminating the traces of polishing wheel grinding and enhancing the overall polishing and grinding effect of the grinding machine. The structure of the utility model is simple, easy to use and convenient to maintain. The two groups of polishing mechanisms are symmetrically arranged, greatly improving the polishing and grinding efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is the front view of the embodiment of the double-sided valve body grinding machine of the utility model;

[0022] Figure 2 is the top view of the embodiment of the double-sided valve body grinding machine of the utility model;

[0023] Figure 3 is the right view of the embodiment of the double-sided valve body grinding machine of the utility model;

[0024] Figure 4 is the structural schematic diagram of the embodiment of the double-sided valve body grinding machine of the utility model;

[0025] Figure 5 is the sectional view of the embodiment of the double-sided valve body grinding machine of the utility model;

[0026] Figure 6 is one of the structural schematic diagrams of two groups of polishing mechanisms in the embodiment of the double-sided valve body grinding machine of the utility model;

[0027] Figure 7 is the other structural schematic diagram of two groups of polishing mechanisms in the embodiment of the double-sided valve body grinding machine of the utility model;

[0028] Figure 8 is the structural schematic diagram of one group of polishing mechanisms in the embodiment of the double-sided valve body grinding machine of the utility model;

[0029] Figure 9 is the structural exploded view of one group of polishing mechanisms in the embodiment of the double-sided valve body grinding machine of the utility model.

[0030] In the figure, 1 - cabinet, 2 - polishing mechanism, 3 - support, 4 - driving wheel, 5 - driven wheel, 6 - telescopic adjustment device, 7 - abrasive belt tensioning device, 8 - polishing abrasive belt, 9 - tensioning wheel, 10 - feeding port, 11 - feeding track, 12 - double-sided solenoid valve body, 13 - first slide rail, 14 - slide block, 15 - valve body fixing bracket, 16 - first cylinder, 17 - U-shaped bracket, 18 - balance cylinder, 19 - adjustment motor, 20 - floating flange, 21 - fine adjustment device, 22 - fixing plate, 23 - slide plate, 24 - top plate, 25 - second cylinder, 26 - main control device, 27 - alarm device, 28 - manual distance control device, 29 - protective cover, 30 - feeding mechanism, 31 - support feet, 32 - manual adjustment mechanism, 33 - balance rod, 34 - right-angle fixing seat. Detailed implementation manners

[0031] The following further describes the detailed implementation manners of the present utility model in conjunction with the accompanying drawings. It should be noted here that the description of these implementation manners is used to help understand the present utility model, but does not constitute a limitation to the present utility model. In addition, the technical features involved in the various implementation manners of the present utility model described below can be combined with each other as long as they do not conflict with each other.

[0032] As Figures 1-9 shown, a double-sided valve body grinding machine includes: a grinding machine main body, the grinding machine main body includes a cabinet 1 and a polishing mechanism 2. The polishing mechanism 2 is arranged at the rear side inside the cabinet 1. A feeding port is provided corresponding to the polishing mechanism 2 in the middle of the cabinet 1. There are two groups of polishing mechanisms 2. The two groups of polishing mechanisms 2 are respectively movably connected to the frame arranged inside the cabinet 1 through corresponding supports 3. A manual distance control device 28 is provided corresponding to the outside of the support 3. The two groups of polishing mechanisms 2 are symmetrically arranged. Each group of polishing mechanisms 2 includes a driving wheel 4, a driven wheel 5, a telescopic adjustment device 6, an abrasive belt tensioning device 7 and a polishing abrasive belt 8. The telescopic adjustment device 6 includes a tensioning wheel 9 and an adjustment mechanism movably arranged below the tensioning wheel 9. The polishing abrasive belt is movably arranged outside the driving wheel 4, the tensioning wheel 9 and the driven wheel 5. Among them, there are two driven wheels 5. The two driven wheels 5, the driving wheel 4 and the tensioning wheel 9 make the polishing abrasive belt 8 be arranged in a trapezoid shape. The abrasive belt tensioning device 7 is movably arranged inside the polishing abrasive belt 8. The movable end of the abrasive belt tensioning device 7 is floatingly connected to the polishing abrasive belt 8. A feeding track 11 is horizontally arranged corresponding to the feeding port 10 at the front side of the cabinet 1. A feeding mechanism is provided in the feeding port 10 corresponding to the two groups of polishing mechanisms 2. A double-sided solenoid valve body 13 is movably arranged at the upper part of the feeding mechanism.

[0033] Specifically, in this embodiment, the telescopic adjustment device 6 can move the polishing abrasive belt 8 within a set range through the adjustment mechanism, automatically adjust the height to keep the same friction force between the workpiece and the abrasive belt, and perfectly fit the surface of the workpiece, which can avoid over-polishing or incomplete polishing caused by the up-and-down undulation of the workpiece surface. The two polishing mechanisms 2 are symmetrically arranged, greatly improving the efficiency of polishing and grinding.

[0034] Specifically, in this embodiment, manual distance adjustment devices are respectively provided on both sides of the cabinet corresponding to the two polishing mechanisms 2. The manual distance adjustment device 28 can adjust the distance between the two polishing mechanisms 2 according to the valve body structure.

[0035] Specifically, in this embodiment, the feeding mechanism 30 includes a flexible protective cover movably arranged outside.

[0036] Specifically, in this embodiment, the support 3 includes a first support and a second support. The first support and the second support are symmetrically arranged respectively. First support seats and second support seats are correspondingly provided at the lower parts of the first support and the second support respectively. The first support and the second support are respectively movably connected to the frame through the first support seat and the second support seat. The first support and the second support can respectively move relative to the corresponding first support seat and second support seat through the corresponding manual distance adjustment device 28. Bottom plates are vertically provided on the front sides of the first support and the second support respectively. Two driven wheels 5 are arranged at intervals on the bottom plates. The first support and the second support are respectively bolted to the corresponding bottoms.

[0037] In a preferred embodiment of the present utility model, the feeding mechanism is arranged corresponding to the feeding port 10. The feeding mechanism includes a first slide rail 13, a slide seat 14, a valve body fixing frame 15, and a first cylinder 16. The first slide rail 13 is horizontally arranged. The slide seat 14 is movably arranged on the first slide rail 13. The valve body fixing frame 15 is vertically arranged on the upper part of the slide seat 14. Slots for installing the double-sided solenoid valve body 13 are embedded on both sides of the valve body fixing frame 14. The first cylinder 16 is arranged corresponding to the first slide rail 13 and is movably connected to the slide seat 14.

[0038] Specifically, in this embodiment, one end of the feeding mechanism 30 is perpendicularly arranged with respect to the corresponding feeding track 11, and the feeding mechanism is matched with the feeding track 11.

[0039] In a preferred embodiment of the present utility model, a U-shaped bracket 17 is provided below the tensioning wheel 9. The tensioning wheel 9 is movably connected to the adjustment mechanism through the U-shaped bracket 17. The adjustment mechanism includes a manual adjustment mechanism 32 and an electric adjustment mechanism. The manual adjustment mechanism 32 is arranged outside the U-shaped bracket 17. The electric adjustment mechanism is movably connected to the corresponding support 3 through the provided right-angle fixing seat.

[0040] The U-shaped bracket 17 includes a front support plate, a rear support plate and a cross brace plate which are integrally arranged. A sleeve is vertically provided at the lower part of the cross brace plate. U-shaped clamping grooves matching with the rotating shaft of the tensioning wheel 9 are embedded in the upper parts of the front support plate and the rear support plate. A limiting plate is arranged on the outer side of the rear support plate. The manual adjustment mechanism is located below the limiting plate and is adjustably connected to the rotating shaft. A balance rod is horizontally arranged at the lower end of the front support plate. The free end of the balance rod is movably connected to a balance cylinder 18 arranged on the front side of the corresponding support 3. The manual adjustment mechanism is a prior art and will not be elaborated here.

[0041] Specifically, in this embodiment, the balance cylinder 18 is located on the front side of the corresponding support 3. The balance cylinder 18 is vertically arranged. The balance cylinder 18 is movably connected through a connecting mechanism arranged on the front side of the corresponding support 3. A connecting mechanism matching with the balance rod 33 is arranged at the lower part of the balance cylinder 18. A protective cover 29 is arranged on the front side of the cabinet 1 corresponding to the balance cylinder 18.

[0042] In a preferred embodiment of the present utility model, the electric adjustment mechanism includes an adjustment motor 19, a floating flange 20 and a fine adjustment device 21. The output end of the adjustment motor 19 is movably connected to the sleeve. The floating flange 20 is movably arranged at the output end and is located outside the sleeve. The fine adjustment device 21 is electrically connected to the adjustment motor 19. The adjustment motor 19 is a servo motor.

[0043] Specifically, in this embodiment, the sleeve matches with the output end of the adjustment motor 19.

[0044] Specifically, in this embodiment, the adjustment motor 19 includes a first swing motor and a second swing motor. The first swing motor and the second swing motor are respectively arranged at the rear sides of the first support and the second support. The first swing motor and the second swing motor are respectively movably connected to the first support and the second support through corresponding fixing seats 34.

[0045] In a preferred embodiment of the present utility model, the sand belt tensioning device 7 includes a fixing plate 22, a sliding plate 23 and a top plate 24. The top plate 24 is arranged at one end of the sliding plate 23 and is close to the two driven wheels 5. The fixing plate 22 is vertically arranged at the rear side of the support 3. The sliding plate 23 is arranged in parallel with the fixing plate 22. The sliding plate 23 is movably connected to the fixing plate 22 through a sliding mechanism arranged correspondingly on the inner side.

[0046] Specifically, in this embodiment, the fixing plate 22 is located at the rear side of the bottom plate. The fixing plate 22 is bolted to the bottom plate on the corresponding support 3. A U-shaped clearance groove is arranged at one end of the sliding plate 23; the sliding mechanism includes two second slide rails arranged on the front side of the fixing plate and sliders matching with the two second slide rails. The two second slide rails are horizontally arranged and are spaced on both sides of the U-shaped clearance groove.

[0047] In a preferred embodiment of the present utility model, one end of the fixed plate 22 is provided with a U-shaped clearance groove in a penetrating manner. A second cylinder 25 is provided on one side of the fixed plate 22 adjacent to the sliding plate 23. An L-shaped bracket is provided on the upper part of the fixed plate 22. The second cylinder 25 is movably connected to the fixed plate 22 through the L-shaped bracket. A receiving groove is provided in the middle of the sliding plate 23 in a penetrating manner. A space for the movement of the second cylinder 25 is provided in the receiving groove. The telescopic rod of the second cylinder 25 is movably connected to the sliding plate 23 through a connecting device correspondingly arranged on the front side of the receiving groove.

[0048] Specifically, in this embodiment, the connecting device is a connecting nut embedded in the middle of the sliding plate 23. The connecting nut is fixedly arranged in the middle of the sliding plate 23. The middle part of the sliding plate 23 is threadedly connected to the telescopic rod of the second cylinder 25.

[0049] In a preferred embodiment of the present utility model, a connecting plate is provided at the front end of the sliding plate 23. The top plate 24 is movably connected to the sliding plate 23 through the connecting plate. The top plate 24 is made of a flexible wear-resistant material.

[0050] Specifically, in this embodiment, the connecting plate is vertically arranged at the front end of the sliding plate 23. The connecting plate is bolted to the sliding plate 23.

[0051] In a preferred embodiment of the present utility model, a driving motor is provided corresponding to the driving wheel 4 at the lower inner part of the cabinet 1. The driving wheel 4 is movably connected to the driving motor.

[0052] Specifically, in this embodiment, the two polishing mechanisms 2 respectively drive the driving wheel 4 through the driving motors correspondingly arranged at the lower part, and drive the polishing abrasive belts on the outside to polish the valve body. A dust storage device is movably arranged outside the cabinet 1. The dust storage device is hermetically connected to the cabinet 1 through an air extraction pipe at the lower part.

[0053] In a preferred embodiment of the present utility model, a main control device 26 is further included. The main control device 26 is electrically connected to the driving motor, the telescopic adjustment device, the abrasive belt tensioning device, the fine adjustment device, the feeding mechanism 30, and the feeding track respectively.

[0054] Specifically, in this embodiment, an alarm device 27 is provided at the upper part of the cabinet 1. The alarm device 27 is electrically connected to the main control device 26. Movable doors are provided on the front side and the rear side of the cabinet 1. Sealing strips matching the cabinet are provided circumferentially on the outer side of the movable doors. Support feet 31 and / or casters are provided at the bottom of the cabinet 1. A height adjustment device is provided on the support feet 31.

[0055] In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model. In addition, the terms "first", "second", "third" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance.

[0056] In the description of the present utility model, it should be noted that unless otherwise clearly specified and defined, the terms "installed", "connected", "coupled" shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific circumstances.

[0057] The above has described in detail the embodiments of the present utility model in conjunction with the drawings, but the present utility model is not limited to the described embodiments. For those skilled in the art, without departing from the principle and spirit of the present utility model, various changes, modifications, substitutions, and variations made to these embodiments still fall within the protection scope of the present utility model.

Claims

1. A double-sided valve body grinding machine, comprising: The main body of the grinding machine, the main body of the grinding machine includes a cabinet and a polishing mechanism. The polishing mechanism is arranged at the rear side inside the cabinet. A feeding port is provided corresponding to the polishing mechanism in the middle of the cabinet. The polishing mechanism has two groups. The two groups of polishing mechanisms are respectively movably connected to a frame arranged inside the cabinet through corresponding supports. A manual distance adjustment device is correspondingly arranged on the outer side of the support. It is characterized in that the two groups of polishing mechanisms are symmetrically arranged. The two groups of polishing mechanisms both include a driving wheel, a driven wheel, a telescopic adjustment device, a sand belt tensioning device and a polishing sand belt. The telescopic adjustment device includes a tensioning wheel and an adjustment mechanism movably arranged below the tensioning wheel. The polishing sand belt is movably arranged on the outer sides of the driving wheel, the tensioning wheel and the driven wheel. Among them, there are two driven wheels. The two driven wheels, the driving wheel and the tensioning wheel make the polishing sand belt arranged in a trapezoid shape. The sand belt tensioning device is movably arranged on the inner side of the polishing sand belt. The movable end of the sand belt tensioning device is floatingly connected to the polishing sand belt. A feeding track is horizontally arranged corresponding to the feeding port on the front side of the cabinet. A feeding mechanism is arranged in the feeding port corresponding to the two groups of polishing mechanisms. A double-sided solenoid valve body is movably arranged on the upper part of the feeding mechanism.

2. The double-sided valve body grinding machine according to claim 1, characterized in that The feeding mechanism is arranged corresponding to the feeding port. The feeding mechanism includes a first slide rail, a slide seat, a valve body fixing frame and a first cylinder. The first slide rail is horizontally arranged. The slide seat is movably arranged on the first slide rail. The valve body fixing frame is vertically arranged on the upper part of the slide seat. Slots for installing the double-sided solenoid valve body are embedded on both sides of the valve body fixing frame. The first cylinder is arranged corresponding to the first slide rail and is movably connected to the slide seat.

3. The double-sided valve body grinding machine according to claim 1, characterized in that A U-shaped bracket is arranged below the tensioning wheel. The tensioning wheel is movably connected to the adjustment mechanism through the U-shaped bracket. The adjustment mechanism includes a manual adjustment mechanism and an electric adjustment mechanism. The manual adjustment mechanism is arranged on the outer side of the U-shaped bracket. The electric adjustment mechanism is movably connected to the corresponding support through a right-angle fixing seat arranged.

4. The double-sided valve body grinding machine according to claim 3, characterized in that, The U-shaped bracket includes a front support plate, a rear support plate and a cross brace plate which are integrally arranged. A sleeve is vertically arranged below the cross brace plate. U-shaped slots matching the rotating shaft of the tensioning wheel are embedded on the upper parts of the front support plate and the rear support plate. A limiting plate is arranged on the outer side of the front support plate. The manual adjustment mechanism is located below the limiting plate and is adjustably connected to the rotating shaft. A balance rod is horizontally arranged at the lower end of the rear support plate. The free end of the balance rod is movably connected to a balance cylinder arranged at the rear side of the corresponding support.

5. The double-sided valve body grinding machine according to claim 4, characterized in that, The electric adjustment mechanism includes an adjustment motor, a floating flange and a micro adjustment device. The output end of the adjustment motor is movably connected to the sleeve. The floating flange is movably arranged on the outer sides of the output end and the sleeve. The micro adjustment device is electrically connected to the adjustment motor. The adjustment motor is a servo motor.

6. The double-sided valve body grinding machine according to claim 1, characterized in that The abrasive belt tensioning device includes a fixed plate, a sliding plate, and a top plate. The top plate is arranged at one end of the sliding plate and is close to the two driven wheels. The fixed plate is vertically arranged on the front side of the support. The sliding plate is arranged in parallel with the fixed plate, and the sliding plate is movably connected to the fixed plate through a sliding mechanism arranged correspondingly on the inner side.

7. The double-sided valve body grinding machine according to claim 6, wherein A U-shaped clearance groove is penetrated through one end of the fixed plate. A second cylinder is arranged on one side of the fixed plate adjacent to the sliding plate. An L-shaped bracket is arranged on the upper part of the fixed plate. The second cylinder is movably connected to the fixed plate through the L-shaped bracket. A receiving groove is penetrated through the middle of the sliding plate. A space for the movement of the second cylinder is arranged in the receiving groove. The telescopic rod of the second cylinder is movably connected to the sliding plate through a connecting device arranged correspondingly on the front side of the receiving groove.

8. The double-sided valve body grinding machine according to claim 7, characterized in that, A connecting plate is arranged at the front end of the sliding plate. The top plate is movably connected to the sliding plate through the connecting plate. The top plate is made of a flexible wear-resistant material.

9. The double-sided valve body grinding machine according to claim 1, wherein, A driving motor is arranged on the inner side lower part of the cabinet corresponding to the driving wheel. The driving wheel is movably connected to the driving motor.

10. The double-sided valve body grinding machine according to claim 9, characterized in that, It further includes a main control device. The main control device is electrically connected to the driving motor, the telescopic adjustment device, the abrasive belt tensioning device, the fine adjustment device, the feeding mechanism, and the feeding track respectively.

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