A wedge gate valve pair research machine

Abstract

The application discloses a wedge gate valve matching and grinding machine, which comprises a crankcase, a reciprocating rod, a linear bearing chamber shell, an adapter sleeve and a valve clack connecting block. The linear bearing chamber shell is used as a clamping position of a three-dimensional sliding table to install the whole matching and grinding machine above a valve shell, and the valve clack is connected to the valve clack connecting block. When the gate valve is manufactured, a standard valve clack model can be used to grind the valve seats after welding, so that the angle between the valve seats meets the design precision, and the interchangeability of the valve clacks is realized. When the gate valve on a pipeline is maintained, the valve seat angle can be quickly matched with the valve clack and the valve seat to meet the sealing design requirement. Meanwhile, the matching and grinding machine can reduce the operation skill and experience requirement of the operator.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of grinding machine, in particular to a wedge gate valve pair grinding machine. BACKGROUND

[0002] 1、In the manufacturing process of wedge gate valve, the valve seat ring is welded to the valve shell, and the valve shell and the seat ring are deformed due to welding, the wedge angle between the two seat rings deviates from the design angle, and the sealing ring of the valve disc is ground manually until the sealing ring is continuous.

[0003] 2、During the first maintenance after the nuclear power, thermal power and petrochemical production, the welding stress of the valve shell welded on the pipeline and the high temperature and high pressure after the operation of the device change the internal stress of the valve shell, so that the angle of the seat ring on both sides of the valve changes, the sealing is invalid, and the valve disc needs to be manually ground to adapt to the change of the angle of the deformed seat ring.

[0004] The above two cases require high technical and experience of the grinding operator, and it takes a long time to complete the grinding work of a valve. SUMMARY

[0005] The purpose of the present application is to provide a wedge gate valve pair grinding machine to solve the problems existing in the prior art, and to grind the valve seat after welding by using a standard valve disc model during the manufacturing of the gate valve, so that the angle between the valve seats meets the design precision and the interchangeability of the valve disc is realized.

[0006] To achieve the above purpose, the present application provides the following scheme: the present application provides a wedge gate valve pair grinding machine, which comprises

[0007] A crankcase is provided, the crankcase is provided with a crankshaft, and a servo motor is used to drive the rotation of the crankshaft; and

[0008] A reciprocating rod is connected to the middle journal of the crankshaft through a connecting rod, and the end of the connecting rod is connected to the pin hole of the head of the reciprocating rod through a connecting rod pin shaft; and

[0009] A linear bearing chamber shell is arranged on the bottom of the crankcase, and the outer side of the reciprocating rod is provided with the linear bearing chamber shell; the linear bearing chamber shell is clamped on a three-dimensional slide; linear bearings A and B are arranged in the linear bearing chamber shell, and the linear bearings A and B are coaxially arranged on the outer side of the upper and lower ends of the reciprocating rod, respectively, and the reciprocating rod reciprocates relative to the linear bearings A and B; and

[0010] An adapter sleeve is connected to the end of the reciprocating rod through a shaft shoulder screw and driven to reciprocate with the reciprocating rod; and

[0011] A valve clack connecting block is connected to a swing shaft through a pin shaft A, the lower part of the swing shaft is connected to the valve clack connecting block through a pin shaft B, and the valve clack is assembled in the valve clack connecting block.

[0012] Preferably, the servo motor is mounted on the crankcase through a screw, the output shaft of the servo motor extends into the crankcase, and the input end of the crankshaft is in transmission connection with the output shaft of the servo motor.

[0013] Preferably, the two end journals of the crankshaft are assembled in the crankcase through rolling bearings A, the middle journal of the crankshaft is arranged eccentrically relative to the two end journals, a rolling bearing B is arranged on the middle journal of the crankshaft, and shaft retaining rings are arranged on both sides of the middle journal of the crankshaft.

[0014] Preferably, the top end of the connecting rod is connected with the rolling bearing B, and the top end face of the connecting rod is limited by a hole retaining ring to limit the axial movement of the connecting rod and the rolling bearing B.

[0015] Preferably, a balance spring is coaxially sleeved on the upper part of the reciprocating rod, one end of the balance spring coincides with the flange at the top of the reciprocating rod, and the other end of the balance spring is seated at the hole bottom step face in the linear bearing chamber shell; the balance spring is located at the top of the linear bearing A.

[0016] Preferably, a buffer spring is arranged between the bottom of the linear bearing chamber shell and the top of the adapter sleeve; the top end of the shaft shoulder screw is connected with the end of the reciprocating rod after passing through a linear bearing C arranged in the adapter sleeve; and the buffer spring is sleeved on the reciprocating rod.

[0017] Preferably, a jacking screw and a rectangular gasket are further arranged at the valve clack connecting block, the rectangular gasket is placed on the upper plane of the valve clack, and the jacking screw sequentially passes through the valve clack connecting block and the rectangular gasket to jack the valve clack connecting block and the valve clack.

[0018] Preferably, the lower part of the valve clack connecting block is assembled in the slot hole of the valve clack.

[0019] The present invention achieves the following beneficial technical effects compared to the prior art:

[0020] The wedge gate valve grinding machine of this invention includes a crankcase, a reciprocating rod, a linear bearing housing, an adapter sleeve, and a valve disc connecting block. The linear bearing housing serves as the clamping position of a three-dimensional slide, mounting the entire grinding machine above the valve body and connecting the valve disc to the valve disc connecting block. During gate valve manufacturing, a standard valve disc model can be used to grind and weld the valve seat, ensuring that the angle between the valve seats meets the design precision and achieving valve disc interchangeability. When maintaining gate valves on pipelines, if valve seat angle deformation occurs, the valve disc and valve seat can be quickly ground to meet the sealing design requirements. Furthermore, this grinding machine reduces the skill and experience requirements for operators. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0022] Figure 1 This is an isometric view of the external appearance of the wedge gate valve grinding machine in an embodiment of the present invention;

[0023] Figure 2 This is a structural diagram of a wedge gate valve grinding machine;

[0024] Figure 3 for Figure 2 Sectional view along line AA in the middle;

[0025] Figure 4 for Figure 3 BB-direction sectional view in the middle;

[0026] Among them, 1. Crankcase; 110. Top cover; 120. Rolling bearing A; 130. Rolling bearing B; 2. Servo motor; 3. Linear bearing housing; 4. Adapter sleeve; 41. Linear bearing C; 5. Swing shaft; 51. Pin A; 52. Pin B; 6. Valve disc connecting block; 61. Tightening screw; 62. Rectangular washer; 7. Valve disc; 8. Crankshaft; 81. Shaft retaining ring; 82. End journals; 9. Connecting rod; 91. Hole retaining ring A; 92. Wear-resistant bushing; 93. Connecting rod pin; 10. Reciprocating rod; 101. Balance spring; 102. Linear bearing A; 103. Linear bearing B; 11. Buffer spring; 111. Hole retaining ring B; 12. Shoulder screw. Detailed Implementation

[0027] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely. Obviously, the described embodiments are only a part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative efforts belong to the scope of the present application.

[0028] The present application aims to provide a wedge gate valve pairing grinding machine to solve the problems in the prior art. When manufacturing the gate valve, the angle between the valve seats can be ground to meet the design precision by using a standard valve disc model, and the interchangeability of the valve disc is achieved. When maintaining the gate valve on the pipeline, the valve seat angle can be quickly ground with the valve disc to meet the sealing design requirements. Meanwhile, the pairing grinding machine can reduce the requirements for the operation skills and experience of the operator.

[0029] To make the above-mentioned purposes, features and advantages of the present application more obvious and easy to understand, the present application will be further described in detail below with reference to the drawings and specific embodiments.

[0030] As shown in Figures 1-4 , the present application provides a wedge gate valve pairing grinding machine, which comprises

[0031] a crankcase 1, a crankshaft 8 is assembled in the crankcase 1, and a servo motor 2 is used to drive the crankshaft 8 to rotate; and

[0032] a reciprocating rod 10, a connecting rod 9 is connected to the middle journal of the crankshaft 8, and the end of the connecting rod 9 is connected to the pin hole of the head of the reciprocating rod 10 through a connecting rod pin shaft 93; and

[0033] a linear bearing chamber housing 3, the bottom of the crankcase 1 is provided with the linear bearing chamber housing 3, and the outer side of the reciprocating rod 10 is provided with the linear bearing chamber housing 3; the linear bearing chamber housing 3 is clamped on a three-dimensional sliding table; the linear bearing chamber housing 3 is provided with a linear bearing A102 and a linear bearing B103, the linear bearing A102 and the linear bearing B103 are coaxially located on the outer sides of the upper and lower ends of the reciprocating rod 10, respectively, and the reciprocating rod 10 reciprocates relative to the linear bearing A102 and the linear bearing B103; and

[0034] an adapter sleeve 4, the end of the reciprocating rod 10 is connected to the adapter sleeve 4 through a shaft shoulder screw 12 and drives the adapter sleeve 4 to reciprocate; and

[0035] a valve disc connecting block 6, the adapter sleeve 4 is connected to a swing shaft 5 through a pin shaft A51, the swing shaft 5 is connected to the valve disc connecting block 6 through a pin shaft B52 below, and a valve disc 7 is assembled in the valve disc connecting block 6.

[0036] In one embodiment, the servo motor 2 is mounted on the crankcase 1 by screws, the flange of the servo motor 2 coincides with the body of the crankcase 1, the output shaft of the servo motor 2 extends into the crankcase 1 and matches the inner hole of the crankshaft 8, and the input end of the crankshaft 8 is in transmission connection with the output shaft of the servo motor 2, and the output torque is transmitted through a flat key.

[0037] In one embodiment, the two end journals 82 of the crankshaft 8 are assembled in the crankcase 1 through rolling bearings A120, the middle journal of the crankshaft 8 is arranged eccentrically with the two end journals 82, the middle journal of the crankshaft 8 is provided with a rolling bearing B130, and the middle journal of the crankshaft 8 is provided with shaft check rings 81 on both sides of the rolling bearing B130.

[0038] The center lines of the two end journals 82 of the crankshaft 8 coincide, the middle journal of the crankshaft 8 is arranged eccentrically with the two end journals 82, one end of the crankshaft 8 has a hole matched with the servo motor 2 and connected through a key, and the middle journal of the crankshaft 8 limits the axial movement of the rolling bearing B130 through the shaft check ring 81. The upper cover 110 is connected with the crankcase 1 through bolts, the inside of the upper cover 110 is coaxially matched with the rolling bearing A120, and the middle cavity of the upper cover 110 accommodates the connecting rod 9 and is larger than the movement space of the connecting rod 9.

[0039] In one embodiment, the top end of the connecting rod 9 is connected with the rolling bearing B130, the top end face of the connecting rod 9 is limited in axial movement with the rolling bearing B130 through a hole check ring A91; the end of the connecting rod 9 is connected with the pin hole of the head of the reciprocating rod 10 through a wear-resistant bushing 92 and a connecting rod pin 93.

[0040] In one embodiment, the upper part of the reciprocating rod 10 is coaxially sleeved with a balance spring 101, one end of the balance spring 101 coincides with the flange at the top of the reciprocating rod 10, the other end of the balance spring 101 is seated at the hole bottom step face in the linear bearing chamber shell 3; the balance spring 101 is located at the top of the linear bearing A102, the linear bearing A102 is coaxial with the reciprocating rod 10, the upper part of the linear bearing A102 coincides with the hole bottom step in the linear bearing chamber shell 3 and is limited by the lower end face of the balance spring 101, the lower end face of the linear bearing A102 coincides with the plane of the step hole, so that the linear bearing A102 is axially fixed relative to the linear bearing chamber shell 3. The linear bearing B103 is installed in the linear bearing chamber shell 3 and coaxial, the upper end coincides with the empty step of the linear bearing chamber shell 3 and matches the hole check ring B111 at the lower part, and the linear bearing B103 is axially fixed relative to the linear bearing chamber shell 3.

[0041] In one of the embodiments, a buffer spring 11 is arranged between the bottom of the linear bearing chamber housing 3 and the top of the adapter sleeve 4; the top end of the shaft shoulder screw 12 is connected to the end of the reciprocating rod 10 after passing through the linear bearing C41 arranged in the adapter sleeve 4; the buffer spring 11 is sleeved on the reciprocating rod 10. The upper part of the buffer spring 11 coincides with the lower end face of the linear bearing chamber housing 3 and is coaxial, and the lower part of the buffer spring 11 coincides with the upper end face of the adapter sleeve 4 while pressing the end face of the linear bearing C41. The linear bearing C41 is coaxial with the reciprocating rod 10, and the lower part of the buffer spring 11 and the step inside the hole of the adapter sleeve 4 limit the axial position of the adapter sleeve 4. The adapter sleeve 4 is coaxial with the linear bearing C41 and the reciprocating rod 10, and the buffer spring 11 is pre-pressed by the shaft shoulder screw 12.

[0042] In one of the embodiments, a valve clack connecting block 6 is also provided with a tightening screw 61 and a rectangular gasket 62, the rectangular gasket 62 is placed on the upper plane of the valve clack 7, and the tightening screw 61 sequentially passes through the valve clack connecting block 6 and the rectangular gasket 62 to tighten the valve clack connecting block 6 and the valve clack 7.

[0043] In one of the embodiments, the upper part of the swing shaft 5 is connected with the adapter sleeve 4 through a pin shaft A51, and the lower part is connected with the valve clack connecting block 6 through a pin shaft B52; the lower part of the rectangular gasket 62 coincides with the upper plane of the valve clack 7, and the upper part coincides with the head of the tightening screw 61, and after the tightening screw 61 is tightened, the lower part of the valve clack connecting block 6 is assembled in the slot hole of the valve clack 7.

[0044] In one of the embodiments, the power of the servo motor 2 is 2Kw; the reciprocating force of the reciprocating rod 10 is 5000N, the reciprocating stroke is 5mm, and the reciprocating frequency is maximum 3000 times / minute, which can be adjusted.

[0045] The wedge gate valve pair grinder in the application has the working principle as follows:

[0046] 1. The wedge gate valve pair grinder is installed above the valve shell through a three-dimensional sliding table, and the linear bearing chamber housing 3 serves as a clamping position of the three-dimensional sliding table.

[0047] 2. The valve clack 7 (or the valve clack 7 mold) is connected to the valve clack connecting block 6 of the wedge gate valve pair grinder.

[0048] 3. The three-dimensional sliding table is adjusted so that the linear bearing chamber housing 3 is perpendicular to the upper flange face of the valve shell and coaxial with the inner hole of the upper flange of the valve shell.

[0049] 4. The surface of the valve clack 7 is smeared with a metallographic grinding paste.

[0050] 5. The servo motor 2 is powered on and operated.

[0051] 6. The servo motor 2 drives the crankshaft 8 to rotate.

[0052] 7. Due to the eccentricity between the middle journal of crankshaft 8 and the journals 82 at both ends (servo motor 2 journals), connecting rod 9 swings around the journals 82 at both ends of crankshaft 8.

[0053] 8. The swing of connecting rod 9 drives reciprocating rod 10 to produce reciprocating motion through wear-resistant bushing 92 and connecting rod pin 93.

[0054] 9. The balance spring 101 applies a tension in the direction of the crankshaft 8 to the reciprocating rod 10, thereby balancing the gravity of the valve disc 7 and reducing the torque requirement of the servo motor 2 required for the crankshaft 8 to move upward.

[0055] 10. The reciprocating rod 10 reciprocates relative to linear bearings A102 and B103.

[0056] 11. The reciprocating rod 10 transmits reciprocating motion to the adapter sleeve 4 through the shoulder screw 12, thereby driving the adapter sleeve 4 to reciprocate.

[0057] 12. The adapter sleeve 4 is connected to the swing shaft 5 via pin A51. The swing shaft 5 is connected to the valve disc connecting block 6 via pin B52 below, driving the valve disc 7 to reciprocate.

[0058] 13. Pins A51 and B52 reduce the requirement for coaxiality between the reciprocating rod 10 and the upper flange hole in this invention.

[0059] 14. Operate the three-dimensional slide table to move valve disc 7 toward valve seat until valve disc 7 and valve seat rub against each other.

[0060] 15. If the operation is improper, after reaching the grinding position, the valve disc 7 will continue to move beyond the grinding position. At this time, the reciprocating motion will be blocked, and the buffer spring 11 will start to compress to prevent the servo motor 2 from being overloaded.

[0061] 16. When the preset grinding time is reached, stop the servo motor 2, raise the valve disc 7 on the three-dimensional slide, clean the valve disc 7 and valve seat, and check the sealing ring with blue oil. If the technical requirements are not met, repeat the above steps.

[0062] 17. If the sealing ring meets the technical requirements, replace it with a metallographic polishing paste with a smaller particle size and repeat the above steps until the roughness meets the technical requirements.

[0063] 18. Remove the wedge gate valve grinding machine; grinding is now complete.

[0064] It is to be understood that the application is not limited to the details of the above-exemplified embodiments and that the present application can be carried out in other concrete ways without departing from the spirit or essential characteristics of the application. Consequently, all changes and modifications that can suggest themselves to one skilled in the art have to be seen as being within the scope of the present application as defined by the following claims. The embodiments are to be considered in all respects as illustrative only and not restrictive of the application described and claimed herein. The application is therefore not to be limited to the specific embodiments described herein, but only by the scope of the appended patent claims and their equivalents.

[0065] The above description of the application is only used to help understand the method and its core idea of the present application. Meanwhile, for those skilled in the art, according to the idea of the present application, the specific implementation and application range can be changed. In summary, the content of the specification should not be understood as a limitation of the present application.

Claims

1. A wedge gate valve pair lapping machine characterized by: Comprising a crankcase, a crankshaft is assembled in the crankcase, a servo motor is used to drive the crankshaft to rotate; and a reciprocating rod, a connecting rod is connected to the middle journal of the crankshaft, the end of the connecting rod is connected to the pin hole of the head of the reciprocating rod through the connecting rod pin shaft; and a linear bearing chamber shell, the bottom of the crankcase is provided with a linear bearing chamber shell, the outer side of the reciprocating rod is provided with the linear bearing chamber shell; the linear bearing chamber shell is clamped on the three-dimensional sliding table; the linear bearing chamber shell is provided with linear bearings A and B, the linear bearings A and B are coaxially located on the outer side of the upper and lower ends of the reciprocating rod respectively, and the reciprocating rod reciprocates relative to the linear bearings A and B; and an adapter sleeve, the end of the reciprocating rod is connected to the adapter sleeve through a shaft shoulder screw and drives the adapter sleeve to reciprocate; and a valve clack connecting block, the adapter sleeve is connected to a swing shaft through a pin shaft A, the swing shaft is connected to the valve clack connecting block through a pin shaft B below, and a valve clack is assembled in the valve clack connecting block; a balance spring is coaxially sleeved on the upper part of the reciprocating rod, one end of the balance spring coincides with the flange at the top of the reciprocating rod, and the other end of the balance spring is seated at the hole bottom step surface in the linear bearing chamber shell; the balance spring is located at the top of the linear bearing A; a buffer spring is arranged between the bottom of the linear bearing chamber shell and the top of the adapter sleeve; the top end of the shaft shoulder screw is connected to the end of the reciprocating rod after passing through the linear bearing C arranged in the adapter sleeve; and the buffer spring is sleeved on the reciprocating rod.

2. The wedge gate valve pair grinder of claim 1, wherein: The servo motor is installed on the crankcase through a screw, the output shaft of the servo motor extends into the crankcase, and the input end of the crankshaft is in transmission connection with the output shaft of the servo motor.

3. The wedge gate valve pair grinder of claim 1, wherein: The both end journals of the crankshaft are assembled in the crankcase through rolling bearings A, the middle journal of the crankshaft is eccentrically arranged with the both end journals, a rolling bearing B is arranged on the middle journal of the crankshaft, and shaft retaining rings are arranged on both sides of the middle journal of the crankshaft.

4. The wedge gate valve pair grinder of claim 3, wherein: The top end of the connecting rod is connected to the rolling bearing B, and the top surface of the connecting rod is limited in axial movement of the connecting rod and the rolling bearing B through a hole retaining ring.

5. The wedge gate valve pair grinder of claim 1, wherein: The valve clack connecting block is also provided with a jacking screw and a rectangular gasket, the rectangular gasket is placed on the upper plane of the valve clack, and the jacking screw sequentially penetrates the valve clack connecting block and the rectangular gasket to jack the valve clack connecting block and the valve clack.

6. The wedge gate valve pair grinder of claim 1, wherein: The lower part of the valve clack connecting block is assembled in the groove hole of the valve clack.

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