Reaming device for valve body machining

Abstract

The invention relates to the technical field of valve body machining, and discloses a reaming device for valve body machining, which comprises a base, a fixed seat and a connecting seat are fixedly mounted on the upper surface of the base, a chip removal hole is formed in the middle of the fixed seat, a sliding seat is fixedly mounted on the front surface of the connecting seat, and a rotating main shaft is mounted on the front surface of the sliding seat; a rotating shaft is fixedly mounted at the bottom of the rotating spindle; and a notch is formed in the curved surface of the rotating shaft. The multiple rubber rings make close contact with the hole wall of the valve body, friction force in the rotating direction of the rotating shaft is large, so that the ring shell, the centering sleeve and the centering ring are static relative to the valve body, the T-shaped rod can drive the rotating sleeve to rotate, the multiple fan blades rotate along with the rotating sleeve, air is blown out downwards, the air in the valve body is in a flowing state, and the valve body is in a closed state. Therefore, heat generated during cutting of the tool bit is taken away, and the flowing airflow can drive the cutting waste to fall down, so that the cutting waste is discharged from a gap between every two adjacent mounting seats.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of valve body machining, and in particular to a reaming device for valve body machining. BACKGROUND

[0002] As a core component of a valve, the size, shape and surface quality of the internal hole of the valve body have important influences on the flow control, sealing performance and service life of the valve. In order to improve the machining precision and adapt to the requirements of different materials and hole diameters, the original internal hole of the valve body needs to be reamed. For some small valve bodies, the valve body is generally drilled first, and then the existing hole is reamed. In the whole process, the drilling head or the reaming head is rotated and pressed downward for machining.

[0003] The existing technology has the following disadvantages: when the reaming tool reams the inside of the valve body, the cutting debris is difficult to discharge, which causes the retained cutting debris to repeatedly rub and scrape the machined surface between the tool and the workpiece, resulting in rough hole walls and failure to achieve the required smoothness. Moreover, the accumulated cutting debris occupies space, which may force the tool to deviate slightly or vibrate, resulting in uneven reaming diameter, oversized hole diameter or trumpet-shaped hole, which affects the production quality. SUMMARY

[0004] The application provides a reaming device for valve body machining, which has the advantages of convenient discharge and solves the problems mentioned in the background.

[0005] To achieve the above-mentioned purpose, the application adopts the following technical scheme: a reaming device for valve body machining, comprising a base, a fixed seat and a connecting seat are fixedly installed on the upper surface of the base, a chip removal hole is formed in the middle of the fixed seat, a sliding seat is fixedly installed on the front surface of the connecting seat, a rotating main shaft is installed on the front surface of the sliding seat, a rotating shaft is fixedly installed at the bottom of the rotating main shaft, and a notch is formed in the curved surface of the rotating shaft;

[0006] A rotating pin is rotatably connected with the rotating shaft, a tool holder is fixedly connected to the middle of the rotating pin, and a tool head is fixedly installed on the outer end of the tool holder;

[0007] A control mechanism is arranged in the interior of the rotating shaft;

[0008] A T-shaped rod is fixedly connected with the lower surface of the rotating shaft, a plurality of sliding grooves are formed in the curved surface of the T-shaped rod, and a heat dissipation mechanism is arranged at the bottom of the T-shaped rod.

[0009] Preferably, the control mechanism comprises an upper mounting cavity, an upper liquid cavity is opened below the upper mounting cavity, a spring is fixedly connected inside the upper mounting cavity, the bottom of the spring is fixedly connected with an upper push plug, a control cavity is arranged below the upper liquid cavity, a push plate is arranged inside the control cavity, a lower liquid cavity is arranged below the control cavity, a communication hole is communicated between the control cavity, the upper liquid cavity and the lower liquid cavity, a lower push plug is slidably connected inside the lower liquid cavity, a threaded sleeve is fixedly connected to the middle of the lower push plug, a threaded rod is threadedly connected to the bottom end of the threaded sleeve, a lower mounting cavity is opened below the lower liquid cavity, a control motor is fixedly installed inside the lower mounting cavity, and the output shaft of the control motor is fixedly connected with the threaded rod.

[0010] The above structure can work by controlling the motor to work, and the threaded rod is slowly rotated by the control motor. Since the threaded sleeve is fixedly connected with the lower push plug, and the lower push plug is slidably connected with the lower liquid cavity, the threaded rod rotates in the positive direction to drive the threaded sleeve and the lower push plug to move downward, and the hydraulic oil on one side of the push plate is sucked into the inside of the lower liquid cavity through the lower communication hole. The spring pushes the upper push plug to move downward, and the hydraulic oil in the upper liquid cavity is pushed into the inside of the control cavity on the other side of the push plate through the upper communication hole, so that the push plate rotates around the rotating pin, and the tool bit on the tool holder slowly extends.

[0011] Preferably, the heat dissipation mechanism comprises a ring shell, a conical net is fixedly connected to the upper side of the ring shell, a centering sleeve is fixedly connected to the middle of the conical net, a rotating sleeve is rotatably installed on the lower surface of the centering sleeve, a plurality of fan blades are fixedly connected to the curved surface of the rotating sleeve, a centering ring is rotatably installed below the rotating sleeve, an annular net is fixedly connected between the bottom of the centering ring and the ring shell, a plurality of mounting seats are fixedly connected to the curved surface of the ring shell, a connecting pin is fixedly installed at the outer end of the mounting seat, and a rubber ring is rotatably installed at the middle of the connecting pin.

[0012] The above structure can work by tightly contacting the hole wall of the valve body through the plurality of rubber rings, and the friction in the rotating direction of the rotating shaft is large, so that the ring shell, the centering sleeve and the centering ring are stationary relative to the valve body. When the tool bit rotates to expand the hole of the valve body, the centering sleeve and the centering ring reduce the deflection of the bottom of the T-shaped rod, ensure the stability of the tool bit during work, and the T-shaped rod drives the rotating sleeve to rotate, and the plurality of fan blades follow the rotation, thereby blowing air downward, so that the air in the valve body is in a flowing state, thereby taking away the heat generated during cutting of the tool bit. Moreover, the flowing air also drives the cutting waste to fall, so that it is discharged from the interstice between the two adjacent mounting seats.

[0013] Preferably, the upper mounting cavity, the upper liquid cavity, the control cavity, the two communication holes, the lower liquid cavity and the lower mounting cavity are all arranged inside the rotating shaft, the upper push plug is slidably connected with the upper liquid cavity and is adapted thereto.

[0014] Preferably, the pushing plate is fixedly connected with the tool holder, and the lower pushing plug is slidably connected with the lower liquid cavity and is matched with the lower liquid cavity.

[0015] Preferably, the centering sleeve and the centering ring are both rotationally connected with the curved surface of the T-shaped rod, and the rotating sleeve is slidably connected with the plurality of sliding grooves.

[0016] Preferably, the plurality of fan blades are circumferentially equidistantly arranged, the plurality of mounting seats are circumferentially equidistantly arranged, and the plurality of sliding grooves are circumferentially equidistantly formed.

[0017] Preferably, the inside of the upper liquid cavity, the control cavity and the two communication holes are filled with hydraulic oil.

[0018] Preferably, the center axis of the T-shaped rod is collinear with the center axis of the rotating shaft.

[0019] Preferably, the distance from the outermost side of the rubber ring to the center of the T-shaped rod is greater than the radius of the bottom of the rotating shaft.

[0020] The beneficial effects of the present application are as follows:

[0021] 1. In the present application, the plurality of rubber rings are in close contact with the hole wall of the valve body, the friction in the rotating direction of the rotating shaft is large, the ring shell, the centering sleeve and the centering ring are stationary relative to the valve body, when the tool bit is expanded, the centering sleeve and the centering ring will reduce the deflection of the bottom of the T-shaped rod, and the stability of the tool bit during work is ensured, the rotating sleeve will be rotated by the T-shaped rod, the plurality of fan blades will be rotated, and the air will be blown downward, so that the air inside the valve body is in a flowing state, thereby taking away the heat generated during cutting of the tool bit, and the flowing air will also drive the cutting waste to fall, so that it is discharged from the interstice between the two adjacent mounting seats.

[0022] 2. In the present application, the control motor is controlled to work, the threaded rod will be slowly rotated, the threaded sleeve is fixedly connected with the lower pushing plug, the lower pushing plug is slidably connected with the lower liquid cavity, the threaded rod rotates in the forward direction to drive the threaded sleeve and the lower pushing plug to move downward, the hydraulic oil on one side of the pushing plate is sucked into the inside of the lower liquid cavity through the lower communication hole, the spring pushes the upper pushing plug to move downward, the hydraulic oil in the inside of the upper liquid cavity is pushed into the inside of the control cavity on the other side of the pushing plate through the upper communication hole, so that the pushing plate rotates around the rotating pin, and the tool bit on the tool holder slowly extends, when the tool bit contacts the inner wall of the valve body, the tool bit will cut the valve body, so that the hole expansion work in a certain range can be completed. BRIEF DESCRIPTION OF DRAWINGS

[0023] The accompanying drawings, which constitute a part of this specification, illustrate embodiments of the present application and serve to explain the principles of the present application in a manner advantageous to understand the present application.

[0024] The present disclosure can be more clearly understood and appreciated from the following detailed description taken in conjunction with the accompanying drawings, in which:

[0025] Figure 1 It is a schematic diagram of the appearance of the present application as a whole;

[0026] Figure 2 It is a schematic diagram of the rotating shaft structure of the present application;

[0027] Figure 3 It is a schematic diagram of the upper mounting cavity of the present application;

[0028] Figure 4 It is a schematic diagram of the Figure 3 enlarged view at A in the middle;

[0029] Figure 5 It is a schematic diagram of the lower mounting cavity of the present application;

[0030] Figure 6 It is a schematic diagram of the control cavity of the present application;

[0031] Figure 7 It is a schematic diagram of the ring shell of the present application;

[0032] Figure 8 It is a schematic diagram of the threaded sleeve of the present application.

[0033] 1, base; 2, fixed seat; 3, connecting seat; 4, chip removal hole; 5, sliding seat; 6, rotating main shaft; 7, rotating shaft; 8, notch; 9, rotating pin; 10, tool holder; 11, tool bit; 12, control mechanism; 121, upper mounting cavity; 122, upper liquid cavity; 123, spring; 124, upper push plug; 125, control cavity; 126, push plate; 127, lower liquid cavity; 128, communication hole; 129, lower push plug; 1210, threaded sleeve; 1211, threaded rod; 1212, lower mounting cavity; 1213, control motor; 13, T-shaped rod; 14, sliding groove; 15, heat dissipation mechanism; 151, ring shell; 152, conical net; 153, centering sleeve; 154, rotating sleeve; 155, fan blade; 156, centering ring; 157, annular net; 158, mounting seat; 159, connecting pin; 1510, rubber ring. DETAILED DESCRIPTION

[0034] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0035] Please refer to Figures 1-8The application discloses a reaming device for valve body machining, which comprises a base 1, a fixed seat 2 and a connecting seat 3 are fixedly installed on the upper surface of the base 1, a chip removal hole 4 is formed in the middle part of the fixed seat 2, a sliding seat 5 is fixedly installed on the front surface of the connecting seat 3, a rotating main shaft 6 is installed on the front surface of the sliding seat 5, a rotating shaft 7 is fixedly installed at the bottom of the rotating main shaft 6, and a notch 8 is formed in the curved surface of the rotating shaft 7.

[0036] A rotating pin 9 is rotationally connected with the rotating shaft 7, a tool seat 10 is fixedly connected with the middle part of the rotating pin 9, and a tool bit 11 is fixedly installed at the outer end of the tool seat 10.

[0037] A control mechanism 12 is arranged in the interior of the rotating shaft 7.

[0038] A T-shaped rod 13 is fixedly connected with the lower surface of the rotating shaft 7, a plurality of sliding grooves 14 are formed in the curved surface of the T-shaped rod 13, and a heat dissipation mechanism 15 is arranged at the bottom of the T-shaped rod 13.

[0039] The control mechanism 12 comprises an upper installation cavity 121, an upper liquid cavity 122 is formed below the upper installation cavity 121, a spring 123 is fixedly connected in the interior of the upper installation cavity 121, an upper push plug 124 is fixedly connected to the bottom of the spring 123, a control cavity 125 is arranged below the upper liquid cavity 122, a push plate 126 is arranged in the interior of the control cavity 125, a lower liquid cavity 127 is arranged below the control cavity 125, a communication hole 128 is arranged in communication between the control cavity 125, the upper liquid cavity 122 and the lower liquid cavity 127, a lower push plug 129 is slidably connected in the interior of the lower liquid cavity 127, a threaded sleeve 1210 is fixedly connected to the middle part of the lower push plug 129, a threaded rod 1211 is threadedly connected to the bottom end of the threaded sleeve 1210, a lower installation cavity 1212 is formed below the lower liquid cavity 127, a control motor 1213 is fixedly installed in the interior of the lower installation cavity 1212, and the output shaft of the control motor 1213 is fixedly connected with the threaded rod 1211.

[0040] The heat dissipation mechanism 15 comprises a ring shell 151, a conical net 152 is fixedly connected to the upper portion of the ring shell 151, a centering sleeve 153 is fixedly connected to the middle part of the conical net 152, a rotating sleeve 154 is rotatably installed on the lower surface of the centering sleeve 153, a plurality of fan blades 155 are fixedly connected to the curved surface of the rotating sleeve 154, a centering ring 156 is rotatably installed below the rotating sleeve 154, an annular net 157 is fixedly connected between the bottom of the centering ring 156 and the ring shell 151, a plurality of installation seats 158 are fixedly connected to the curved surface of the ring shell 151, a connecting pin 159 is fixedly installed at the outer end of the installation seat 158, and a rubber ring 1510 is rotatably installed at the middle part of the connecting pin 159.

[0041] The function is that the friction in the rotating direction of the rotating shaft 7 is larger by the close contact of the plurality of rubber rings 1510 and the hole wall of the valve body, so that the ring shell 151, the centering sleeve 153 and the centering ring 156 are stationary relative to the valve body, when the cutter head 11 rotates to expand the hole of the valve body, the centering sleeve 153 and the centering ring 156 will reduce the deflection of the bottom of the T-shaped rod 13, ensure the stability of the cutter head 11 during operation, and the T-shaped rod 13 will drive the rotating sleeve 154 to rotate, and the plurality of vanes 155 will follow the rotation, so as to blow air downward, so that the air inside the valve body is in a flowing state, thereby carrying away the heat generated during cutting of the cutter head 11, and the flowing air will also drive the cutting waste to fall, so that it is discharged from the gap between the two adjacent mounting seats 158.

[0042] Wherein, the upper installation cavity 121, the upper liquid cavity 122, the control cavity 125, the two communication holes 128, the lower liquid cavity 127 and the lower installation cavity 1212 are all arranged in the rotating shaft 7, the upper push plug 124 is slidably connected with the upper liquid cavity 122 and is adapted thereto, the push plate 126 is fixedly connected with the cutter seat 10, and the lower push plug 129 is slidably connected with the lower liquid cavity 127 and is adapted thereto, the function is that by controlling the operation of the motor 1213, the threaded rod 1211 will be slowly rotated, because the threaded sleeve 1210 is fixedly connected with the lower push plug 129, and the lower push plug 129 is slidably connected with the lower liquid cavity 127, the forward rotation of the threaded rod 1211 will drive the threaded sleeve 1210 and the lower push plug 129 to move downward, the hydraulic oil on one side of the push plate 126 will be sucked into the lower liquid cavity 127 through the lower communication hole 128, and the spring 123 will push the upper push plug 124 to move downward, so that the hydraulic oil in the upper liquid cavity 122 will be pushed into the control cavity 125 on the other side of the push plate 126 through the upper communication hole 128, so that the push plate 126 will rotate around the rotating pin 9, so that the cutter head 11 on the cutter seat 10 will slowly extend, when the cutter head 11 contacts the inner wall of the valve body, the cutter head 11 will cut the valve body, so that the hole expanding operation in a certain range can be completed.

[0043] The center sleeve 153 and the center ring 156 are rotationally connected with the curved surface of the T-shaped rod 13, the rotating sleeve 154 is slidingly connected with the plurality of sliding grooves 14, the plurality of fan blades 155 are circumferentially equidistantly arranged, the plurality of mounting seats 158 are circumferentially equidistantly arranged, the plurality of sliding grooves 14 are circumferentially equidistantly provided, the inside of the liquid inlet cavity 122, the control cavity 125 and the two communication holes 128 is filled with hydraulic oil, the center axis of the T-shaped rod 13 is collinear with the center axis of the rotating shaft 7, and the distance from the outermost side of the rubber ring 1510 to the center of the T-shaped rod 13 is greater than the radius of the bottom of the rotating shaft 7. The function is that the rotating main shaft 6 moves downward along the sliding rail, the plurality of rubber rings 1510 contact the hole wall in the valve body, and the friction between the rubber ring 1510 and the hole wall is large, so that the heat dissipation mechanism 15 and the T-shaped rod 13 first slide relative to each other, and then move downward after contacting the top of the T-shaped rod 13.

[0044] Working principle:

[0045] The valve body to be reamed is fixedly installed on the fixed seat 2, so that the center axis of the valve body is collinear with the center axis of the rotating shaft 7.

[0046] The rotating main shaft 6 moves downward along the sliding rail, the plurality of rubber rings 1510 contact the hole wall in the valve body, and the friction between the rubber ring 1510 and the hole wall is large, so that the heat dissipation mechanism 15 and the T-shaped rod 13 first slide relative to each other, and then move downward after contacting the top of the T-shaped rod 13. When the cutter head 11 moves to the reaming position of the valve body, the rotating main shaft 6 stops moving downward and drives the rotating shaft 7 to rotate. Then, the control motor 1213 works, the threaded rod 1211 is driven to rotate slowly, the threaded sleeve 1210 is fixedly connected with the lower push plug 129, the lower push plug 129 is slidingly connected with the lower liquid cavity 127, the threaded rod 1211 rotates in the forward direction to drive the threaded sleeve 1210 and the lower push plug 129 to move downward, the hydraulic oil on one side of the push plate 126 is sucked into the inside of the lower liquid cavity 127 through the lower communication hole 128, and the spring 123 pushes the upper push plug 124 to move downward, so that the hydraulic oil in the upper liquid cavity 122 is pushed into the control cavity 125 on the other side of the push plate 126 through the upper communication hole 128, thereby causing the push plate 126 to rotate around the rotating pin 9, and the cutter head 11 on the cutter seat 10 slowly extends. When the cutter head 11 contacts the inner wall of the valve body, the cutter head 11 cuts the valve body. By controlling the extension amount of the cutter head 11 from the rotating shaft 7, the up-and-down movement of the rotating main shaft 6 can change the reaming range, and the above operation can ream holes with different diameters in the valve body;

[0047] When the rotating main shaft 6 drives the cutter head 11 to move, the heat dissipation mechanism 15 and the T-shaped rod 13 will slide relative to each other, and when the rotating shaft 7 is driven to rotate, the friction force in the rotating direction of the rotating shaft 7 is large due to the close contact between the plurality of rubber rings 1510 and the hole wall of the valve body, so that the ring shell 151, the centering sleeve 153 and the centering ring 156 are stationary relative to the valve body. When the cutter head 11 expands the hole of the valve body, the centering sleeve 153 and the centering ring 156 will reduce the deflection of the bottom of the T-shaped rod 13, ensuring the stability of the cutter head 11 during operation. The T-shaped rod 13 will drive the rotating sleeve 154 to rotate, and the plurality of fan blades 155 will follow the rotation, thereby blowing air downward, so that the air inside the valve body is in a flowing state, thereby taking away the heat generated during cutting of the cutter head 11. Moreover, the flowing air current will also drive the cutting waste to fall, so that it is discharged from the gap between the two adjacent mounting seats 158.

[0048] It should be noted that the above embodiments are only used to illustrate the technical solutions of the present application and are not limiting. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced by equivalents without departing from the spirit and scope of the technical solutions of the present application, and they should be covered in the scope of the claims of the present application.

Claims

1. A reaming device for valve body machining, comprising a base (1), wherein a fixed seat (2) and a connecting seat (3) are fixedly mounted on the upper surface of the base (1), a chip removal hole (4) is provided in the middle of the fixed seat (2), a sliding seat (5) is fixedly mounted on the front side of the connecting seat (3), and a rotating spindle (6) is mounted on the front side of the sliding seat (5), characterized in that, A rotating shaft (7) is fixedly installed at the bottom of the rotating spindle (6), and a notch (8) is opened on the curved surface of the rotating shaft (7). Rotary pin (9), which is rotatably connected to rotating shaft (7), and a tool holder (10) is fixedly connected to the middle of the rotating pin (9), and a tool head (11) is fixedly installed at the outer end of the tool holder (10). A control mechanism (12) is disposed inside the rotating shaft (7); T-shaped rod (13), the T-shaped rod (13) is fixedly connected to the lower surface of the rotating shaft (7), the curved surface of the T-shaped rod (13) is provided with multiple sliding grooves (14), and the bottom of the T-shaped rod (13) is provided with a heat dissipation mechanism (15).

2. The reaming device for valve body processing according to claim 1, characterized in that, The control mechanism (12) includes an upper mounting cavity (121), an upper liquid cavity (122) is provided below the upper mounting cavity (121), a spring (123) is fixedly connected inside the upper mounting cavity (121), an upper push plug (124) is fixedly connected to the bottom of the spring (123), a control cavity (125) is provided below the upper liquid cavity (122), a push plate (126) is provided inside the control cavity (125), and a lower liquid cavity (127) is provided below the control cavity (125). The control cavity (125) and the upper liquid cavity (122) are connected. Each of the lower liquid chambers (127) is connected by a connecting hole (128). A lower push plug (129) is slidably connected inside the lower liquid chamber (127). A threaded sleeve (1210) is fixedly connected to the middle of the lower push plug (129). A threaded rod (1211) is threadedly connected to the bottom end of the threaded sleeve (1210). A lower mounting cavity (1212) is opened below the lower liquid chamber (127). A control motor (1213) is fixedly installed inside the lower mounting cavity (1212). The output shaft of the control motor (1213) is fixedly connected to the threaded rod (1211).

3. The reaming device for valve body processing according to claim 2, characterized in that, The heat dissipation mechanism (15) includes an annular shell (151), a conical mesh (152) is fixedly connected to the upper part of the annular shell (151), a central sleeve (153) is fixedly connected to the middle part of the conical mesh (152), a rotating sleeve (154) is rotatably installed on the lower surface of the central sleeve (153), a plurality of fan blades (155) are fixedly connected to the curved surface of the rotating sleeve (154), a central ring (156) is rotatably installed below the rotating sleeve (154), an annular mesh (157) is fixedly connected between the bottom of the central ring (156) and the annular shell (151), a plurality of mounting seats (158) are fixedly connected to the curved surface of the annular shell (151), a connecting pin (159) is fixedly installed at the outer end of the mounting seat (158), and a rubber ring (1510) is rotatably installed in the middle part of the connecting pin (159).

4. The reaming device for valve body processing according to claim 3, characterized in that, The upper mounting cavity (121), upper liquid cavity (122), control cavity (125), two connecting holes (128), lower liquid cavity (127), and lower mounting cavity (1212) are all opened inside the rotating shaft (7). The upper push plug (124) is slidably connected to the upper liquid cavity (122) and is adapted to it.

5. A reaming device for valve body machining according to claim 4, characterized in that, The push plate (126) is fixedly connected to the knife holder (10), and the lower push plug (129) is slidably connected to the lower liquid chamber (127) and adapted to it.

6. The reaming device for valve body machining according to claim 5, characterized in that, The centering sleeve (153) and centering ring (156) are rotatably connected to the curved surface of the T-shaped rod (13), and the rotating sleeve (154) is slidably connected to multiple sliding grooves (14).

7. The reaming device for valve body machining according to claim 6, characterized in that, The multiple fan blades (155) are arranged circumferentially at equal intervals, the multiple mounting bases (158) are arranged circumferentially at equal intervals, and the multiple sliding grooves (14) are all opened circumferentially at equal intervals.

8. A reaming device for valve body machining according to claim 7, characterized in that, The upper liquid chamber (122), control chamber (125), and two connecting holes (128) are filled with hydraulic oil.

9. A reaming device for valve body machining according to claim 8, characterized in that, The central axis of the T-shaped rod (13) is collinear with the central axis of the rotating shaft (7).

10. A reaming device for valve body machining according to claim 9, characterized in that, The distance from the outermost edge of the rubber ring (1510) to the center of the T-shaped rod (13) is greater than the radius of the bottom of the rotating shaft (7).

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