External pressurizing hydraulic cylinder

Abstract

A first piston cavity is formed in one side of a main cylinder body, a hydraulic face is arranged on one side of a pressurizing cylinder body, the other side of the pressurizing cylinder body is arranged in the first piston cavity and conducts sealed in-out movement, a second piston cavity is formed in the other side of the pressurizing cylinder body, and an external cylinder body is arranged outside the other side of the main cylinder body. A third piston cavity is formed between the external cylinder body and the other side of the main cylinder body, one end of the plunger is arranged in the second piston cavity, a circle of second protrusion is arranged at the other end of the plunger and located in the third piston cavity, the valve rod is connected with the other end of the plunger and penetrates through the external cylinder body, and a position sensor is arranged at the set position of the movement track of the valve rod. The utility model has the advantages of simple structure, external cylinder body, further pressurization, and simple and convenient operation.

Description

Technical Field

[0001] The utility model relates to an externally pressurized hydraulic cylinder. Background Art

[0002] At present, for the hydraulic cylinders used in super-large hydraulic presses at home and abroad (hydraulic thrust> 5000 tons), ultra-high pressure design of more than 45MPa is generally adopted. Ultra-high pressure hydraulic cylinders have the following advantages: 1. Save the weight of raw materials and reduce production costs; 2. Reduce the cylinder diameter size of the hydraulic cylinder for easy machining. At present, the structure of ultra-high pressure hydraulic cylinders at home and abroad is the same as that of ordinary hydraulic cylinders. A separate ultra-high pressure booster is required to boost the pressure inside the ultra-high pressure to reach the ultra-high pressure. Its disadvantages are: it needs to be equipped with an independent booster and hydraulic control system, which has the disadvantages of high cost and complex control system.

[0003] The utility model relates to an externally pressurized hydraulic cylinder, which is designed and constructed based on an existing hydraulic cylinder, eliminating an independent supercharger and a hydraulic control system, and has the advantages of simple system structure, reduced cost, etc., and can well solve the above disadvantages. Utility Model Content

[0004] The utility model aims to solve the shortcomings in the prior art and proposes an externally pressurized hydraulic cylinder.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an externally pressurized hydraulic cylinder, comprising a main cylinder body, a plunger, an external cylinder body, a position sensor, a valve stem, a booster cylinder body and a hydraulic surface, a first piston chamber is provided on one side of the main cylinder body, a hydraulic surface is provided on one side of the booster cylinder body, the other side of the booster cylinder body is provided in the first piston chamber for sealed in and out movement, a second piston chamber is provided inside the other side of the booster cylinder body, an external cylinder body is provided outside the other side of the main cylinder body, a third piston chamber is formed between the external cylinder body and the other side of the main cylinder body, one end of the plunger is provided in the second piston chamber, the other end of the plunger is provided with a circle of second protrusions, the second protrusions are located in the third piston chamber, the valve stem is connected to the other end of the plunger and passes through the external cylinder body, and a position sensor is provided at a set position of the valve stem movement trajectory.

[0006] Furthermore, a booster cylinder base is provided on one side of the main cylinder, and the other side of the booster cylinder sealably slides through the center of the booster cylinder base and is arranged in the first piston cavity, and the booster cylinder base is sealed and connected to one side of the main cylinder.

[0007] Furthermore, a circle of first protrusions is arranged on the other side of the boost cylinder body, the outer side of the first protrusions is slidingly sealed with the inner wall of the first piston cavity, and a main cylinder return cavity is formed between the first protrusions and the base of the boost cylinder body.

[0008] Furthermore, a plunger seat is provided outside the third piston chamber near the other side of the main cylinder body, and the plunger seal slides through the center of the plunger seat. The plunger seat and the plunger seal separate the third piston chamber and the second piston chamber.

[0009] Furthermore, a plunger return cavity is formed between the second protrusion and the plunger seat.

[0010] Furthermore, the main cylinder body is provided with a main cylinder body oil return hole, a main cylinder body liquid filling hole and a main cylinder body oil inlet hole. The main cylinder body oil return hole is connected to the main cylinder return cavity; the main cylinder body liquid filling hole and the main cylinder body oil inlet hole are connected to the first piston cavity.

[0011] Furthermore, an external cylinder oil return hole is provided on the external cylinder body, and the external cylinder oil return hole is connected to the plunger return cavity.

[0012] Furthermore, an external cylinder oil inlet hole is provided on the external cylinder, and the external cylinder oil inlet hole is connected to the third piston.

[0013] Furthermore, the opening side of the second piston chamber is connected to the first piston chamber, and the cross-section of one side of the plunger is smaller than the cross-section of the second piston chamber.

[0014] Furthermore, the second protrusion is sealingly and slidingly connected to the corresponding outer wall.

[0015] The utility model has the following beneficial effects: the system has a simple structure, low cost, an external cylinder body, can further increase the pressure, and is simple and convenient to operate. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a schematic diagram of the structure of the utility model Figure 1 .

[0017] Figure 2 It is a schematic diagram of the structure of the utility model Figure 2 . DETAILED DESCRIPTION

[0018] The following will be combined with the attached embodiment of the utility model Figure 1-2 , the technical solutions in the embodiments of the utility model are described clearly and completely. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments.

[0019] Example 1 Reference Figure 1-2A hydraulic cylinder with external boosting includes a main cylinder body 1, a plunger 4, an external cylinder body 3, a position sensor 13, a valve stem 10, a boosting cylinder body 2 and a hydraulic surface 12. A first piston chamber 11 is provided on one side of the main cylinder body, a hydraulic surface 12 is provided on one side of the boosting cylinder body, and the other side of the boosting cylinder body is provided in the first piston chamber for sealed in and out movement. A second piston chamber 21 is provided inside the other side of the boosting cylinder body, and an external cylinder body is provided outside the other side of the main cylinder body. A third piston chamber 31 is formed between the external cylinder body and the other side of the main cylinder body. One end of the plunger is provided in the second piston chamber, and the other end of the plunger 4 is provided with a circle of second protrusions 20, and the second protrusion is located in the third piston chamber. One end of the valve stem is connected to the other end of the plunger and passes through the external cylinder body. A position sensor 13 is provided at a set position of the valve stem movement trajectory.

[0020] An externally pressurized hydraulic cylinder has a booster cylinder base 18 on one side of the main cylinder body, and the other side of the booster cylinder body is sealed and slid through the center of the booster cylinder base and is arranged in the first piston cavity, and the booster cylinder base is sealed and connected to one side of the main cylinder body.

[0021] A hydraulic cylinder with external boosting, a circle of first protrusions 19 is arranged on the other side of the boosting cylinder body, the outer side of the first protrusion is slidingly sealed with the inner wall of the first piston cavity, and a main cylinder return cavity 15 is formed between the first protrusion and the base of the boosting cylinder body.

[0022] An externally pressurized hydraulic cylinder, a third piston chamber is provided with a plunger seat 16 outside the other side of the main cylinder body near the main cylinder body, the plunger seal slides through the center of the plunger seat, and the plunger seat and the plunger seal separate the third piston chamber and the second piston chamber.

[0023] An externally pressurized hydraulic cylinder, wherein a plunger return chamber 14 is formed between the second protrusion and the plunger seat.

[0024] A hydraulic cylinder with external booster, a main cylinder body is provided with a main cylinder body oil return hole 7, a main cylinder body liquid filling hole 5 and a main cylinder body oil inlet hole 6, the main cylinder body oil return hole is connected to the main cylinder return cavity; the main cylinder body liquid filling hole and the main cylinder body oil inlet hole are connected to the first piston cavity.

[0025] An externally pressurized hydraulic cylinder has an external cylinder body provided with an external cylinder body oil return hole 9, and the external cylinder body oil return hole is connected with a plunger return chamber.

[0026] An externally pressurized hydraulic cylinder is provided with an external cylinder oil inlet hole 8 on the external cylinder body, and the external cylinder oil inlet hole is connected to a third piston.

[0027] An externally pressurized hydraulic cylinder, wherein the opening side of the second piston chamber is connected to the first piston chamber, and the cross section of one side of the plunger is smaller than the cross section of the second piston chamber.

[0028] An externally pressurized hydraulic cylinder, wherein the second protrusion is sealingly and slidingly connected to the corresponding outer wall.

[0029] An externally pressurized hydraulic cylinder, the other end of the valve stem is provided with a position sensor sensing part 17.

[0030] An externally pressurized hydraulic cylinder with rapid push-out and medium-speed operation:

[0031] The hydraulic oil enters the third piston chamber of the external cylinder through the external cylinder oil inlet hole 8, pushes the plunger out, and pushes the booster cylinder out; the main cylinder inhales the hydraulic oil at a large flow rate through the main cylinder filling hole 5;

[0032] After the rapid push stops, the medium-speed push will resume. The hydraulic oil will enter the main cylinder through the oil inlet hole 6 of the main cylinder. The rapid plunger will retreat under the action of the main cylinder pressure. The medium-speed push will stop after the hydraulic thrust reaches 25MPA.

[0033] An externally pressurized hydraulic cylinder, hydraulic cylinder pressurization working and full reset state:

[0034] After the medium speed stops, the hydraulic oil enters the external cylinder through the external cylinder oil inlet hole 8, and the plunger is pushed out.

[0035] The action is reset, the hydraulic oil enters the external cylinder through the external cylinder oil return hole 9, the plunger return chamber pushes the plunger back, the hydraulic oil enters the master cylinder return chamber through the master cylinder oil return hole 7, retreats to the master cylinder retreat and resets, the hydraulic oil in the master cylinder rear chamber quickly returns through the filling hole 5, and the master cylinder stops after resetting.

[0036] The above are only preferred specific implementation methods of the utility model, but the protection scope of the utility model is not limited to this. Any technician familiar with the technical field within the technical scope disclosed by the utility model, who makes equivalent replacements or changes based on the technical scheme and utility model concept of the utility model, should be covered by the protection scope of the utility model.

Claims

1. An externally pressurized hydraulic cylinder, comprising a main cylinder, a plunger, an external cylinder, a position sensor, a valve stem, a pressurized cylinder and a hydraulic surface, characterized in that: A first piston chamber is provided on one side of the main cylinder body, a hydraulic surface is provided on one side of the boost cylinder body, and the other side of the boost cylinder body is provided in the first piston chamber for sealed in and out movement. A second piston chamber is provided inside the other side of the boost cylinder body, and an external cylinder body is provided outside the other side of the main cylinder body. A third piston chamber is formed between the external cylinder body and the other side of the main cylinder body. One end of the plunger is provided in the second piston chamber, and a circle of second protrusions is provided on the other end of the plunger. The second protrusion is located in the third piston chamber. The valve stem is connected to the other end of the plunger and passes through the external cylinder body. A position sensor is provided at a set position of the valve stem movement trajectory.

2. The externally pressurized hydraulic cylinder according to claim 1, characterized in that: A booster cylinder base is provided on one side of the main cylinder body, and the other side of the booster cylinder body is sealed and slid through the center of the booster cylinder base and is arranged in the first piston cavity, and the booster cylinder base is sealed and connected to one side of the main cylinder body.

3. The externally pressurized hydraulic cylinder according to claim 2, characterized in that: A circle of first protrusions is arranged on the other side of the boost cylinder body, the outer side of the first protrusions is slidably sealed with the inner wall of the first piston cavity, and a main cylinder return cavity is formed between the first protrusions and the boost cylinder body base.

4. The externally pressurized hydraulic cylinder according to claim 3, characterized in that: A plunger seat is arranged outside the third piston chamber near the other side of the main cylinder body, and the plunger seal slides through the center of the plunger seat. The plunger seat and the plunger seal separate the third piston chamber and the second piston chamber.

5. The externally pressurized hydraulic cylinder according to claim 4, characterized in that: A plunger return cavity is formed between the second protrusion and the plunger seat.

6. The externally pressurized hydraulic cylinder according to claim 5, characterized in that: The main cylinder body is provided with a main cylinder body oil return hole, a main cylinder body liquid filling hole and a main cylinder body oil inlet hole. The main cylinder body oil return hole is connected to the main cylinder return cavity; the main cylinder body liquid filling hole and the main cylinder body oil inlet hole are connected to the first piston cavity.

7. The externally pressurized hydraulic cylinder according to claim 5, characterized in that: An external cylinder body oil return hole is arranged on the external cylinder body, and the external cylinder body oil return hole is communicated with the plunger return cavity.

8. The externally pressurized hydraulic cylinder according to claim 5, characterized in that: The external cylinder body is also provided with an external cylinder body oil inlet hole, and the external cylinder body oil inlet hole is connected with the third piston.

9. The externally pressurized hydraulic cylinder according to claim 5, characterized in that: The opening side of the second piston chamber is connected to the first piston chamber, and the cross section of one side of the plunger is smaller than the cross section of the second piston chamber.

10. The externally pressurized hydraulic cylinder according to claim 1, characterized in that: The second protrusion is sealingly and slidingly connected to the corresponding outer wall.

Images