A multi-station grinding machine for conical valve core and valve seat for hydraulic press

Abstract

The present invention relates to a multi-station grinding machine for a conical valve core and valve seat for a hydraulic press, comprising a driving structure, a lever, a support rod, a lifting rod, a lifting rod seat, a guide ring, and a stand; the driving structure comprises a rotating shaft, on which at least one set of levers is fixedly arranged, one end of the lifting rod is hingedly connected to the support rod, the support rod is fixedly arranged on the stand, the lever drives the lifting rod to rotate upward, the lifting rod is provided with at least one small hole, the lifting rod is connected to a screw plug connector through a soft rope, the screw plug connector is fixedly connected to the conical valve core through a thread, and the soft rope passes through a guide ring fixed on the support rod. The grinding machine can not only ensure the quality of conical surface grinding and the matching sealing effect between the conical valve core and the valve seat; it also has the characteristics of high working efficiency and convenient operation, which can reduce the influence of unstable factors on people and reduce the labor intensity of people, and finally ensure the good operation of the hydraulic press equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of valve core and valve seat grinding machines, and in particular to a multi-station grinding machine for a conical valve core and valve seat for a hydraulic press. The grinding machine utilizes the principle that the gravity of the conical valve core itself impacts the conical valve seat to grind the conical valve core and the conical valve seat. Background Art

[0002] The movement of the plunger and other parts in the hydraulic press is achieved by controlling the opening and closing of the valve core and valve seat in the waterway control valve body to control the inflow and outflow of water. Conical valve cores and valve seats are usually used. In order to ensure the stability of the hydraulic press, the sealing effect between the conical valve core and the valve seat must be tight. Whether it is newly processed and assembled or old and repaired, it needs to be ground before installation and use. The conventional grinding method is generally to clamp the conical valve core and valve seat separately through a horizontal lathe or a vertical drilling machine. It is necessary to first find the coaxiality between the two through an instrument, and then apply the grinding material when the two are rotating in the opposite direction, and apply a certain clamping force to make the two conical surfaces closely contact for matching grinding. For conical valve cores with smaller weight and size, they can also be clamped on a handheld electric drill and the valve seat is fastened on a clamp for manual grinding.

[0003] Regardless of whether a lathe or a drilling machine is used, a specially made fixture is required for fixing. There are five commonly used sizes of tapered valve cores and valve seats, and five corresponding fixtures are required. It is inconvenient to switch the fixtures back and forth. In addition, after the fixtures are installed, a certain amount of time is required to adjust the coaxiality between the two, which results in low work efficiency and cannot meet the requirements of large-scale use. Secondly, because it is a manual operation, the grinding quality of the tapered valve core and valve seat will be affected by the level of operator operation. Summary of the invention

[0004] In order to solve the deficiencies of the prior art, the present invention proposes a multi-station grinding machine for a conical valve core and valve seat for a hydraulic press. A special automatic grinding machine is used to grind the conical valve core and valve seat by utilizing the principle that the conical valve core's own gravity impacts the valve seat, thereby eliminating the disadvantages of unstable quality and low efficiency caused by manual operation.

[0005] To achieve the above objectives, the technical solutions adopted by the present invention include:

[0006] A multi-station grinding machine for a conical valve core and valve seat for a hydraulic press, characterized in that it comprises a driving structure, a lever, a support rod, a lifting rod, a lifting rod seat, a guide ring, and a stand;

[0007] The driving structure includes a rotating shaft, on which at least one group of levers is fixedly arranged, one end of the lifting and lowering rod is hingedly connected to the supporting rod, and the supporting rod is fixedly arranged on the platform, and the lever drives the lifting and lowering rod to rotate upward, and the lifting and lowering rod is provided with at least one small hole, and the lifting and lowering rod is connected to the screw plug connecting piece by a soft rope, and the screw plug connecting piece is fixedly connected to the conical valve core by a thread, and the soft rope passes through a guide ring fixed on the support rod.

[0008] Furthermore, the driving structure also includes a driving motor and a sleeve coupling. The driving motor drives the rotating shaft to rotate through the sleeve coupling. Both ends of the rotating shaft are fixed to the stand by two seat bearings respectively.

[0009] Furthermore, at least two groups of non-parallel distributed shifting rods are welded on the rotating shaft, and a lifting rod and a guide ring corresponding to the positions of the shifting rods are arranged on the supporting rod, and the shifting rod drives the lifting rod to rotate upward.

[0010] Furthermore, one end of the landing rod is hingedly connected to the landing rod seat through a pin shaft and a cotter pin, and the landing rod seat is fixedly arranged on the support rod.

[0011] Furthermore, the soft rope passes through the guide ring, one end of the soft rope is fixed to the small hole of the lifting rod, and the other end is fixed to the screw plug connector.

[0012] Furthermore, the conical valve core is in contact with the conical valve seat through the valve cup, the conical valve core is located in the valve cup and is in contact with the valve cup gap, the conical valve seat is respectively connected with the valve cup and the positioning ring, and the positioning ring is fixedly arranged on the stand.

[0013] Furthermore, the guide ring, the screw plug connector, the conical valve core, the valve cup, the conical valve seat and the positioning ring have the same center line in the vertical direction.

[0014] The beneficial effects of the present invention are:

[0015] The multi-station grinding machine for conical valve core and valve seat for hydraulic press of the present invention solves the problem of how to perform matching grinding between conical valve core and valve seat. The grinding machine can not only ensure the grinding quality of the conical surface and the matching sealing effect between the conical valve core and the valve seat, but also has the characteristics of high working efficiency and convenient operation, which can reduce the influence of unstable factors of people and reduce the labor intensity of people, and finally ensure the good operation of hydraulic press equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a front view schematic diagram of an embodiment of a multi-station grinding machine for a conical valve core and valve seat for a hydraulic press of the present invention.

[0017] Figure 2 It is a top view schematic diagram of an embodiment of the present invention.

[0018] Figure 3 It is a side view schematic diagram of an embodiment of the present invention.

[0019] Description of the drawings: 1-stand, 2-drive motor, 3-sleeve coupling, 4-seat bearing, 5-rotating shaft, 6-shift rod, 7-lifting rod seat, 8-pin shaft, 9-open pin, 10-lifting rod, 11-soft rope, 12-support rod, 13-guide ring, 14-screw plug connector, 15-conical valve core, 16-valve cup, 17-conical valve seat, 18-positioning ring. DETAILED DESCRIPTION

[0020] In order to more clearly understand the content of the present invention, it will be described in detail with reference to the drawings and embodiments.

[0021] like Figure 1 , Figure 2 The figure shows a schematic diagram of a multi-station grinding machine for a conical valve core and valve seat for a hydraulic press according to the present invention. The grinding machine includes a driving structure, a lever 6, a support rod 12, a lifting rod 10, a lifting rod seat 7, a guide ring 13, and a stand 1. The driving structure includes a rotating shaft 5, a driving motor 2, and a sleeve coupling 3. The driving motor 2 drives the rotating shaft 5 to rotate through the sleeve coupling 3. The two ends of the rotating shaft 5 are respectively fixed to the stand 1 by two seat bearings 4. Five groups of levers 6 are welded on the rotating shaft 5 at equal intervals and are staggered by 90 degrees. The lifting rod 10 and the guide ring 13 corresponding to the position of the lever 6 are arranged on the support rod. One end of the lifting rod 10 is hinged to the lifting rod seat 10 through a pin 8 and a cotter pin 9. The lifting rod seat 10 is fixedly arranged on the support rod 12. Five groups of conical valve cores 15 of different models and matching conical valve seats 17 are respectively arranged under the lifting rod 10. The lever 6 drives one end of the lifting rod 10 to rotate upward around the pin 8. After the lever 6 is separated from the lifting rod 10, the lifting rod 10 returns to its original position by its own gravity. One end of the soft rope 11 is fixed to the small hole on the lifting rod 10, passes through the guide ring 13, and the other end is fixed to the screw plug connector 14. The screw plug connector 14 is connected to the conical valve core 15 by threaded fixing. The conical valve core 15 is located in the valve cup 16 and contacts with the gap of the valve cup 16, and can slide freely up and down. The conical valve seat 17 is respectively connected with the valve cup 16 and the positioning ring 18. The positioning ring 18 is fixedly arranged on the stand 1 to ensure that the conical valve seat 17 does not move except in the axial direction. The guide ring 13 and the conical valve core 15, the valve cup 16, the conical valve seat 17 and the positioning ring 18 have the same center line in the vertical direction.

[0022] like Figure 3 As shown, when the lifting rod 10 is in a horizontal position, the soft rope 11 is in a relaxed state, and the conical valve core 15 is statically pressed on the conical valve seat 17. The rotating shaft 5 drives the lever 6 to rotate counterclockwise, and when the lifting rod 10 is lifted to the highest position, the lever 6 is separated from the lifting rod 10, and the lifting rod 10 returns to its original position by its own gravity. At the same time, the conical valve core 15 also falls on the conical valve seat 17 by its own gravity and after a short period of gravity acceleration impact to complete a grinding. This reciprocating process is repeated. For each rotation of the lever 6, the five groups of conical valve cores 15 grind the five groups of conical valve seats 17 once. The lifting rod is preferably provided with five small holes, and the rising height of the conical valve core 15 can be adjusted by tying one end of the soft rope 11 to the small holes at different positions. While ensuring that the conical valve core 15 does not separate from the valve cup 16 when it is at the highest position, the grinding force of the conical valve core 15 on the conical valve seat 17 is adjusted.

[0023] The above is only a preferred specific embodiment of the present invention, but the protection scope of the present invention is not limited thereto. Any changes or substitutions that can be easily thought of by a person skilled in the art within the technical scope disclosed by the present invention should be included in the protection scope of the present invention. Therefore, the protection scope of the present invention should be based on the protection scope of the claims.

Claims

1. A multi-station grinding machine for conical valve core and valve seat for hydraulic press, characterized in that: It includes a driving structure, a lever, a support rod, a landing rod, a landing rod seat, a guide ring, and a stand; The driving structure comprises a rotating shaft, on which at least one set of levers is fixedly arranged, one end of the lifting and lowering rod is hingedly connected to the supporting rod, the supporting rod is fixedly arranged on the platform, the lever drives the lifting and lowering rod to rotate upward, the lifting and lowering rod is provided with at least one small hole, the lifting and lowering rod is connected to the screw plug connector through a soft rope, the screw plug connector is fixedly connected to the conical valve core through a thread, and the soft rope passes through a guide ring fixed on the supporting rod; The conical valve core is in contact with the conical valve seat through the valve cup, the conical valve core is located in the valve cup and is in contact with the valve cup gap, the conical valve seat is respectively connected with the valve cup and the positioning ring, and the positioning ring is fixedly arranged on the stand; The guide ring and the screw plug connector, the conical valve core, the valve cup, the conical valve seat and the positioning ring have the same center line in the vertical direction; The lifting rod is provided with five small holes, and the adjustment of the lifting height of the conical valve core is achieved by tying one end of the soft rope to the small holes at different positions.

2. The grinding machine according to claim 1, characterized in that The driving structure also includes a driving motor and a sleeve coupling. The driving motor drives the rotating shaft to rotate through the sleeve coupling. Both ends of the rotating shaft are fixed on the stand by two seat bearings.

3. The grinding machine according to claim 1, characterized in that At least two groups of non-parallel shifting rods are welded on the rotating shaft, and a lifting rod and a guide ring corresponding to the positions of the shifting rods are arranged on the supporting rod, and the shifting rod drives the lifting rod to rotate upward.

4. The grinding machine according to claim 3, characterized in that One end of the landing rod is hingedly connected to the landing rod seat through a pin shaft and a cotter pin, and the landing rod seat is fixedly arranged on the support rod.

5. The grinding machine according to claim 1, characterized in that The soft rope passes through the guide ring, one end of the soft rope is fixed to the small hole of the lifting rod, and the other end is fixed to the screw plug connector.

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