Reversing valve end face grinding method and device

Abstract

The invention relates to the technical field of reversing valve repairing, in particular to a reversing valve end face grinding method and device.The grinding device comprises a base, a connecting boss is arranged on the base, and a plurality of guide mounting holes are evenly distributed in the connecting boss in the circumferential direction and are of through hole structures; a clamping groove matched with the connecting boss in shape is formed in the bottom of the pressing block, and the pressing block and the base are fixedly connected up and down through a locking nut; and the plurality of crimping assemblies are used for connecting the reversing valve and are correspondingly matched with the plurality of guide mounting holes. According to the invention, the plurality of guide mounting holes capable of placing the reversing valves are formed, so that the grinding of the plurality of reversing valves can be realized at one time, and the grinding efficiency is improved; in addition, the grinding precision is guaranteed, and the product percent of pass is increased; manpower is saved, and automatic grinding is achieved.

Description

Technical Field

[0001] The invention relates to the technical field of reversing valve repair, in particular to a reversing valve end face grinding method and device. Background Art

[0002] like Figure 1 and Figure 2 The figure shows the structure of the reversing valve. This type of reversing valve is small in size and light in weight, and requires high grinding precision. The grinding process requires: the surface roughness of the grinding surface of the reversing valve is not less than R0.8, and the verticality of the grinding surface of the reversing valve relative to the axis is not less than 0.005mm.

[0003] At present, when repairing this type of reversing valve, it is pressed on sandpaper and repeatedly ground by hand. The grinding efficiency is low and the labor is large. In addition, the reversing valve often has a certain angle between the ground end face of the reversing valve and the axis of the reversing valve due to uneven loading force of the hand. The grinding accuracy is difficult to guarantee and the product qualification rate is low. Summary of the Invention

[0004] In order to solve the above technical problems, the present invention proposes a method and device for grinding the end face of a reversing valve, which can be mounted on a grinding fixture in batches for high-efficiency, high-precision automated grinding.

[0005] The technical problem to be solved by the present invention is achieved by adopting the following technical solutions:

[0006] A reversing valve end face grinding device, comprising:

[0007] The base is a cylindrical structure with a connecting boss provided thereon. The connecting boss is evenly distributed along the circumference with a plurality of guide mounting holes, and the plurality of guide mounting holes are all through-hole structures;

[0008] The pressing block is a cylindrical structure with a circular groove at the bottom thereof adapted to the shape of the connecting boss. The pressing block is fixedly connected to the base by a locking nut;

[0009] The crimping assembly is used to connect the reversing valve, and is provided in plurality and is adapted to correspond to a plurality of guide mounting holes.

[0010] A method for grinding the end face of a reversing valve, using the above-mentioned device for grinding the end face of a reversing valve, comprises the following steps:

[0011] Step 1: First install the reversing valve into the valve installation hole at the bottom of the crimping sleeve, and make the through hole on the reversing valve and the pin hole on the same axis, then insert the pin shaft horizontally to fix the reversing valve and the crimping sleeve;

[0012] Step 2: Place the connected and fixed reversing valve and crimping sleeve into the guide mounting hole, requiring the pin to be correspondingly inserted into the pin guide groove; then sleeve the crimping spring onto the outer end surface of the sleeve boss on the top of the crimping sleeve;

[0013] Step 3: Repeat steps 1 and 2 to place reversing valves and crimping sleeves in all remaining guide mounting holes;

[0014] Step 4: Put the pressing block on the base. The groove surface of the circular groove compresses the pressing spring. The pressing spring acts on the reversing valve through the pressing assembly, so that the reversing valve is always under axial pressure. At the same time, the ground surface of the lower end of the reversing valve is exposed to the bottom surface of the base.

[0015] Step 5: Install the lock nut into the lock nut mounting hole and thread it into the threaded hole on the pressure block to securely connect the pressure block to the base. At this point, the axis of the reversing valve is perpendicular to the lower end surface of the base.

[0016] Step 6: Place the assembled grinding fixture on the automatic grinding disc for grinding.

[0017] The beneficial effects of the present invention are:

[0018] The present invention provides a method and device for grinding the end face of a reversing valve. Compared with the prior art, by providing a plurality of guide mounting holes for placing the reversing valves, multiple reversing valves can be ground at one time, thereby improving the grinding efficiency. In addition, the guide mounting holes ensure that the axial force of the reversing valve is always perpendicular to the automatic grinding disc, thereby ensuring the grinding accuracy and improving the product qualification rate. Through the pressing block, the crimping spring and the crimping sleeve, the automatic grinding disc provides the reversing valve with power along the grinding end face direction during the grinding process, and the action force of the crimping spring provides the reversing valve with extrusion pressure along the axial direction. This grinding method saves manpower and realizes automatic grinding. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] The present invention will be further described below with reference to the accompanying drawings and embodiments:

[0020] Figure 1 It is a schematic diagram of the cross-sectional structure of the reversing valve;

[0021] Figure 2 It is a side view structural diagram of the reversing valve;

[0022] Figure 3 It is a schematic cross-sectional view of the present invention;

[0023] Figure 4 This is a schematic diagram of the main structure of the pressing block in the present invention;

[0024] Figure 5 Schematic diagram of the top view of the briquette in the present invention;

[0025] Figure 6 Schematic diagram of the structure of the locking nut in the present invention;

[0026] Figure 7 Schematic diagram of the structure of the compression spring in the present invention;

[0027] Figure 8 It is a schematic cross-sectional structural diagram of the crimping sleeve in the present invention;

[0028] Figure 9 Schematic diagram of the structure of the pin in the present invention;

[0029] Figure 10 Schematic diagram of the cross-sectional structure of the base in the present invention;

[0030] Figure 11 Schematic diagram of the top view of the base in the present invention;

[0031] Figure 12 This is a schematic diagram of the first step in the method of the present invention;

[0032] Figure 13 Schematic diagram of the second step in the method of the present invention;

[0033] Figure 14 Schematic diagram of the fourth step in the method of the present invention;

[0034] Figure 15 Schematic diagram of the fifth step in the method of the present invention;

[0035] Figure 16 This is a schematic diagram of the sixth step in the method of the present invention.

[0036] In the figure: 1. Pressure block; 11. Circular groove; 12. Threaded hole; 13. Rectangular block; 2. Locking nut; 3. Crimp spring; 4. Crimp sleeve; 41. Socket boss; 42. Pin hole; 43. Valve mounting hole; 5. Pin shaft; 6. Base; 61. Connecting boss; 62. Guide mounting hole; 63. Locking nut mounting hole; 64. Pin shaft guide groove; 7. Reversing valve. DETAILED DESCRIPTION

[0037] In order to make the technical means, creative features, objectives and effects achieved by the present invention easier to understand, the present invention is further described below with reference to the accompanying drawings and embodiments.

[0038] like Figures 3 to 11 As shown, a reversing valve end face grinding device mainly includes a pressing block 1, a locking nut 2, a crimping spring 3, a crimping sleeve 4, a pin 5, and a base 6.

[0039] The pressure block 1 is a cylindrical structure, and its primary function is to act as a counterweight. Its weight must be greater than the elastic force of the compression spring 3 to ensure that the reversing valve 7, under the action of the gravity of the pressure block 1, offsets the force of the compression spring 3, allowing its surface to be ground flush with the lower reference surface of the base 6. A rectangular block 13 is provided on the top of the pressure block 1 to facilitate securing it to a bench vise during assembly. A circular groove 11 is provided on the bottom of the pressure block 1, with a threaded hole 12 located in the middle of the circular groove 11.

[0040] In this embodiment, the locking nut 2 is a standard hexagon socket head screw, and the locking nut 2 is mainly used to connect the base 6 and the pressure block 1. By adjusting the tightening degree of the locking nut 2, the compression force of the crimping spring 3 can be adjusted.

[0041] In this embodiment, the pressing spring 3 is a compression spring with both ends ground flat. The pressing spring 3 is mainly used to convert the gravity of the pressure block 1 into the elastic force of the pressing spring 3, thereby indirectly transmitting the downward pressure to the reversing valve 7.

[0042] The crimping sleeve 4 and the pin shaft 5 are mainly used to connect and fix the reversing valve 7. The pin shaft 5 limits the Z-axis rotation freedom of the reversing valve 7. The crimping sleeve 4 limits the four degrees of freedom of rotation and movement of the reversing valve 7 in the X-axis and Y-axis directions, thereby controlling the reversing valve 7 to move up and down only in the Z-axis direction.

[0043] Furthermore, the top of the crimping sleeve 4 is provided with a cylindrical sleeve boss 41, and the bottom of the crimping spring 3 is sleeved on the outer end surface of the sleeve boss 41. The underside of the crimping sleeve 4 is provided with a transverse pin hole 42, and the pin shaft 5 is transversely installed in the pin hole 42. The bottom of the crimping sleeve 4 is provided with a valve mounting hole 43 adapted for the reversing valve 7.

[0044] The base 6 serves to support the reversing valve 7 , the pin 5 , the crimping sleeve 4 , and the crimping spring 3 . In addition, the bottom surface of the base 6 serves as a grinding reference surface.

[0045] Furthermore, the base 6 is a cylindrical structure, provided with a similarly cylindrical connecting boss 61. The connecting boss 61 is sized to match the circular groove 11. Several guide holes 62 are evenly distributed along the circumference of the connecting boss 61. In this embodiment, there are three guide holes 62. All three guide holes 62 are through-hole structures; each guide hole 62 is provided with a pin guide groove 64 that mates with the pin 5. A locking nut mounting hole 63 is provided in the center of the base 6. When the pressure block 1 is connected to the base 6, the locking nut 2 is inserted into the locking nut mounting hole 63 and threadedly engages with the threaded hole 12.

[0046] Before the grinding device in the present invention is placed on the automatic grinding disc, the reversing valve 7 is subjected to the force of the crimping spring 3, so that its grinding end surface protrudes to the lower end surface of the base 6. When the grinding device is placed on the automatic grinding disc, since the elastic force of the crimping spring 3 is less than the dead weight of the pressure block 1, the crimping spring 3 will be compressed, and the lower end grinding surface of the reversing valve 7 will always be in close contact with the automatic grinding disc for grinding.

[0047] A method for grinding the end face of a reversing valve, using the above-mentioned device for grinding the end face of a reversing valve, comprises the following steps:

[0048] Step 1: First install the reversing valve in the valve installation hole 43 at the bottom of the crimping sleeve 4, and make the through hole on the reversing valve and the pin hole 42 on the same axis, then insert the pin 5 horizontally to fix the reversing valve and the crimping sleeve 4; Figure 12 shown.

[0049] Step 2: Place the connected and fixed reversing valve and the crimping sleeve 4 into the guide mounting hole 62, requiring the pin 5 to be correspondingly inserted into the pin guide groove 64; then sleeve the crimping spring 3 onto the outer end surface of the sleeve boss 41 at the top of the crimping sleeve 4; Figure 13 shown.

[0050] Step 3: Repeat steps 1 and 2 to place the reversing valves and crimping sleeves 4 in all the remaining guide mounting holes 62;

[0051] Step 4: Put the pressing block 1 on the base 6, the groove surface of the circular groove 11 compresses the pressing spring 3, and the pressing spring 3 acts on the reversing valve through the pressing assembly, so that the reversing valve is always under axial pressure, and the grinding surface of the lower end of the reversing valve is exposed to the bottom surface of the base 6; Figure 14 shown.

[0052] Step 5: Install the lock nut 2 in the lock nut mounting hole 63 and thread it into the threaded hole 12 on the pressure block 1, so that the pressure block 1 is fixedly connected to the base 6. At this time, the axis of the reversing valve is perpendicular to the lower end surface of the base 6; Figure 15shown.

[0053] Step 6: Place the assembled grinding fixture on the automatic grinding disc for grinding; Figure 16 shown.

[0054] The basic principles, main features, and advantages of the present invention are shown and described above. Those skilled in the art should understand that the present invention is not limited to the foregoing embodiments. The foregoing embodiments and description merely illustrate the principles of the present invention. Various changes and modifications may be made to the present invention without departing from the spirit and scope of the present invention. Such changes and modifications are intended to fall within the scope of the present invention. The scope of protection claimed in the present invention is defined by the appended claims and their equivalents.

Claims

1. A reversing valve end face grinding device, characterized in that: include: The base (6) is a cylindrical structure, on which a connecting boss (61) is arranged, and a plurality of guide mounting holes (62) are evenly distributed along the circumference of the connecting boss (61), and the plurality of guide mounting holes (62) are all through-hole structures; The pressing block (1) is a cylindrical structure, and a circular groove (11) is provided at the bottom thereof, the shape of which matches that of the connecting boss (61). The pressing block (1) and the base (6) are fixedly connected up and down by a locking nut (2); The crimping assembly is used to connect the reversing valve (7), and is provided in plurality and is adapted to correspond to the plurality of guide mounting holes (62).

2. A reversing valve end face grinding device according to claim 1, characterized in that: A threaded hole (12) is provided in the middle of the circular groove (11), a locking nut mounting hole (63) is provided in the middle of the base (6), and the locking nut (2) is arranged in the locking nut mounting hole (63) and is threadedly connected to the threaded hole (12).

3. The reversing valve end face grinding device according to claim 1, characterized in that: A rectangular block (13) is arranged on the top of the pressing block (1).

4. The reversing valve end face grinding device according to claim 1, characterized in that: The crimping assembly comprises a crimping sleeve (4), a crimping spring (3) sleeved on the top of the crimping sleeve (4), and a pin shaft (5) inserted into the lower side of the crimping sleeve (4); the bottom of the crimping sleeve (4) is engaged with the reversing valve (7) and fixed by the pin shaft (5); the outer contour of the crimping sleeve (4) is adapted to the inner contour of the guide mounting hole (62).

5. The reversing valve end face grinding device according to claim 4, characterized in that: A sleeve boss (41) is provided at the top of the crimping sleeve (4), and the bottom of the crimping spring (3) is sleeved on the outer end surface of the sleeve boss (41).

6. The reversing valve end face grinding device according to claim 4, characterized in that: The lower side of the crimping sleeve (4) is provided with a pin hole (42) which penetrates transversely, and the pin shaft (5) is transversely installed in the pin hole (42).

7. The reversing valve end face grinding device according to claim 4, characterized in that: The bottom of the crimping sleeve (4) is provided with a valve mounting hole (43) adapted to the reversing valve (7).

8. The reversing valve end face grinding device according to claim 4, characterized in that: A plurality of guide installation holes (62) are provided inside with pin guide grooves (64) adapted to the pins (5).

9. A method for grinding the end face of a reversing valve, characterized in that: A reversing valve end face grinding device according to any one of claims 1 to 8 comprises the following steps: The first step is to install the reversing valve (7) in the valve installation hole (43) at the bottom of the crimping sleeve (4), and make the through hole on the reversing valve (7) and the pin hole (42) on the same axis, and then insert the pin shaft (5) horizontally to fix the reversing valve (7) and the crimping sleeve (4); Step 2: Place the connected and fixed reversing valve (7) and the crimping sleeve (4) into the guide mounting hole (62), and require the pin (5) to be correspondingly inserted into the pin guide groove (64); then, sleeve the crimping spring (3) onto the outer end surface of the sleeve boss (41) at the top of the crimping sleeve (4); Step 3: Repeat the first and second steps to place the reversing valves (7) and the crimping sleeves (4) in all the remaining guide mounting holes (62); Step 4: The pressing block (1) is placed on the base (6), the groove surface of the circular groove (11) compresses the crimping spring (3), and the crimping spring (3) acts on the reversing valve (7) through the crimping assembly, so that the reversing valve (7) is always subjected to axial pressure, and at the same time, the lower end grinding surface of the reversing valve (7) is exposed from the bottom surface of the base (6); Step 5: Install the locking nut (2) in the locking nut installation hole (63) and threadably engage with the threaded hole (12) on the pressing block (1), so that the pressing block (1) is fixedly connected to the base (6). At this time, the axis of the reversing valve (7) is perpendicular to the lower end surface of the base (6); Step 6: Place the assembled grinding fixture onto the automatic grinding disc for grinding.

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