Hydraulic valve-rod-free axial flow valve

Abstract

The utility model discloses a hydraulic valve-rod-free axial flow valve which comprises an inlet valve body, a middle valve body and an outlet valve body, an inlet runner is arranged in the inlet valve body, an outlet runner is arranged in the outlet valve body, a middle runner is arranged in the middle valve body, a sealing valve seat is arranged in the outlet valve body, an oil cylinder cavity is machined in the center of the middle valve body, and a piston is installed in the oil cylinder cavity. The rear end of the oil cylinder cavity is open, a cylinder cover is arranged in the inlet valve body, a valve element is arranged in the outlet cavity, the cylinder cover covers the rear end of the oil cylinder cavity in a sealing mode, a piston rod is arranged in the middle valve body in a penetrating mode, the rear end of the piston rod extends into the oil cylinder cavity to be fixed to the piston, the front end of the piston rod extends into the outlet valve body to be fixed to the valve element, and two oil ways are machined in the middle valve body. The inner ends of the two oil ways are communicated with the front end and the rear end of the oil cylinder cavity respectively, a tandem oil way block is arranged on the side wall of the middle valve body, and the outer ends of the two oil ways are connected with the tandem oil way block respectively. The production and assembly difficulty of the hydraulic valve-rod-free axial flow valve is greatly reduced, and the manufacturing cost is reduced.

Description

Technical Field

[0001] The utility model relates to the field of valves, in particular to a hydraulic stemless axial flow valve. Background Art

[0002] There is a piston-type axial flow valve with patent number 200920209477.5. The oil cylinder in the axial flow valve is manufactured separately, and then the oil cylinder is installed in the valve body. Finally, the inlet and outlet oil pipes of the oil cylinder need to be connected. This makes the production and assembly of the axial flow valve difficult and the manufacturing cost high. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a hydraulic stemless axial flow valve with greatly reduced production and assembly difficulty and reduced manufacturing cost.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is: a hydraulic stemless axial flow valve, characterized in that it includes: an inlet valve body, an intermediate valve body, and an outlet valve body, the inner port of the inlet valve body is connected to the rear end of the intermediate valve body, the inner port of the outlet valve body is connected to the front end of the intermediate valve body, an inlet flow channel is arranged in the inlet valve body, an outlet flow channel is arranged in the outlet valve body, and an intermediate flow channel is arranged in the intermediate valve body. The inlet flow channel, the outlet flow channel, and the intermediate flow channel all axially penetrate the valve body, the inlet flow channel and the outlet flow channel are connected through the intermediate flow channel, a sealing valve seat is arranged in the outlet valve body, a cylinder cavity is processed at the center of the intermediate valve body, a piston is installed in the cylinder cavity, and the rear end of the cylinder cavity is opened so that the piston can be installed in the cylinder cavity, at the inlet A cylinder cover is provided in the valve body, and a valve core is provided in the outlet cavity. The cylinder cover is sealed on the rear end of the cylinder cavity. A piston rod is also passed through the middle valve body. The piston rod and the middle valve body are sealed by a sealing ring. The rear end of the piston rod extends into the cylinder cavity and is fixed to the piston, and the front end of the piston rod extends into the outlet valve body and is fixed to the valve core. Two oil circuits are also processed in the middle valve body. The inner end of one oil circuit is connected with the front end of the cylinder cavity, and the inner end of the other oil circuit is connected with the rear end of the cylinder cavity. A junction oil circuit block for connecting with an external hydraulic pipeline is provided on the side wall of the middle valve body, and the outer ends of the two oil circuits are respectively connected to the junction oil circuit blocks. After the piston rod in the cylinder cavity extends forward to drive the valve core to move forward, the valve core can be sealed against the sealing valve seat to close the outlet flow channel.

[0005] Furthermore, in the aforementioned hydraulic stemless axial flow valve, a spring is arranged between the piston and the cylinder head, and both ends of the spring are respectively abutted against the piston and the cylinder head. Under the action of the spring, the valve core abuts against the sealing valve seat to seal and close the outlet flow channel.

[0006] Furthermore, in the aforementioned hydraulic stemless axial flow valve, the valve core is a sleeve valve core.

[0007] Further, for the aforementioned hydraulic valve without valve stem and axial flow valve, wherein: the inlet valve body and the middle valve body, and the outlet valve body and the middle valve body are fixedly locked by bolts.

[0008] Further, for the aforementioned hydraulic valve without valve stem and axial flow valve, wherein: the cylinder head is screwed onto the rear end of the oil cylinder cavity.

[0009] The advantages of the present utility model are as follows: the hydraulic valve without valve stem and axial flow valve adopts a three-piece structure assembled by an inlet valve body, a middle valve body, and an outlet valve body, which makes the assembly of the axial flow valve simple. In addition, since the cylinder body of the oil cylinder and two oil circuits are directly integrally processed on the middle valve body, and the cylinder head is detachably sealed on the rear end of the oil cylinder cavity, the production and assembly difficulty of the oil cylinder in the axial flow valve is greatly reduced, thereby greatly reducing the manufacturing cost. Description of the Drawings

[0010] Figure 1 It is a schematic cross-sectional structure view of the hydraulic valve without valve stem and axial flow valve of the present utility model from one angle.

[0011] Figure 2 It is a schematic cross-sectional structure view of the hydraulic valve without valve stem and axial flow valve of the present utility model from another angle.

[0012] Figure 3 It is a schematic cross-sectional structure view of the hydraulic valve without valve stem and axial flow valve of the present utility model with a spring installed. Detailed Embodiments

[0013] The following further describes the present utility model in detail with reference to specific embodiments.

[0014] Such as Figure 1 、 Figure 2As shown, the hydraulic stemless axial flow valve comprises: an inlet valve body 1, an intermediate valve body 2, and an outlet valve body 3. In this embodiment, in order to connect the pipeline, flanges are provided on the outer ports of the inlet valve body 1 and the outlet valve body 3, the inner port of the inlet valve body 1 is connected to the rear end of the intermediate valve body 2, and the inner port of the outlet valve body 3 is connected to the front end of the intermediate valve body 2. An inlet flow channel 4 is provided in the inlet valve body 1, an outlet flow channel 6 is provided in the outlet valve body 3, and an intermediate flow channel 5 is provided in the intermediate valve body 2. The inlet flow channel 4, the outlet flow channel 6, and the intermediate flow channel 5 all axially penetrate the valve bodies, and the inlet flow channel 4 and the outlet flow channel 6 are connected through the intermediate flow channel 5. A sealing valve seat 7 is provided in the outlet valve body 3, and a cylinder cavity 8 is processed at the center of the intermediate valve body 2. A piston 9 is installed in the cylinder cavity 8. The rear end of the cylinder cavity 8 is opened so that the piston 9 can be installed in the cylinder cavity 8. A cylinder cover 10 is provided, and a valve core 11 is provided in the outlet cavity 3. The cylinder cover 10 is sealed on the rear end of the cylinder cavity 8. A piston rod 12 is also passed through the intermediate valve body 2. The piston rod 12 and the intermediate valve body 2 are sealed by a sealing ring. The rear end of the piston rod 12 extends into the cylinder cavity 8 and is fixed to the piston 9. The front end of the piston rod 12 extends into the outlet valve body 3 and is fixed to the valve core 11. Two oil circuits 13 are also processed in the intermediate valve body 2. The inner end of one oil circuit 13 is connected to the front end of the cylinder cavity 8, and the inner end of the other oil circuit 13 is connected to the rear end of the cylinder cavity 8. A junction oil circuit block 14 for connecting to an external hydraulic pipeline is provided on the side wall of the intermediate valve body 2. The outer ends of the two oil circuits 13 are respectively connected to the junction oil circuit block 14. After the piston rod 12 in the cylinder cavity 8 extends forward to drive the valve core 11 to move forward, the valve core 11 can be sealed against the sealing valve seat 7 to close the outlet flow channel 6. In this embodiment, after the oil enters the rear end of the cylinder chamber 8 and returns to the front end, the piston rod 12 will extend forward; after the oil returns to the rear end of the cylinder chamber 8 and enters the front end, the piston rod 12 will retract backward.

[0015] like Figure 3 As shown, in actual application, a spring 15 can also be arranged between the piston 9 and the cylinder head 10, and the two ends of the spring 15 are respectively against the piston 9 and the cylinder head 10. Under the action of the spring 15, the valve core 11 is sealed against the sealing valve seat 7 to close the outlet flow channel 6. After the high-pressure hydraulic oil is introduced into the chamber in front of the piston 9, under the action of the high-pressure hydraulic oil, the piston 9 can overcome the spring force and move backward, so that the valve core 11 can open the outlet flow channel 6 without being against the sealing valve seat 7.

[0016] The valve core 11 is a sleeve valve core, and the sleeve valve core structure is an existing structure that can meet the switching performance and

[0017] It can meet the high-precision adjustment function. The inlet valve body 1 and the middle valve body 2, the outlet valve body 3 and the middle valve body 2 are all connected.

[0018] Locking is achieved through bolts for phase locking. The cylinder head 10 is screwed onto the rear end of the oil cylinder chamber 8, which makes it more convenient to assemble the axial flow valve.

Claims

1. Hydraulic valve - less axial flow valve, characterized in that: include: An inlet valve body, an intermediate valve body, and an outlet valve body. The inner port of the inlet valve body is connected to the rear end of the intermediate valve body, and the inner port of the outlet valve body is connected to the front end of the intermediate valve body. An inlet flow channel is arranged in the inlet valve body, an outlet flow channel is arranged in the outlet valve body, and an intermediate flow channel is arranged in the intermediate valve body. The inlet flow channel, the outlet flow channel, and the intermediate flow channel all axially penetrate the valve bodies. The inlet flow channel and the outlet flow channel are connected through the intermediate flow channel. A sealing valve seat is arranged in the outlet valve body. An oil cylinder cavity is processed at the center of the intermediate valve body, and a piston is installed in the oil cylinder cavity. The rear end of the oil cylinder cavity is opened so that the piston can be installed in the oil cylinder cavity. A cylinder cover is arranged in the inlet valve body, and a valve core is arranged in the outlet cavity. The cylinder cover is sealed on the rear end of the cylinder cavity, and a piston rod is also passed through the middle valve body. The piston rod and the middle valve body are sealed by a sealing ring. The rear end of the piston rod extends into the cylinder cavity and is fixed to the piston, and the front end of the piston rod extends into the outlet valve body and is fixed to the valve core. Two oil circuits are also processed in the middle valve body. The inner end of one oil circuit is connected with the front end of the cylinder cavity, and the inner end of the other oil circuit is connected with the rear end of the cylinder cavity. A junction oil circuit block for connecting to an external hydraulic pipeline is provided on the side wall of the middle valve body, and the outer ends of the two oil circuits are respectively connected to the junction oil circuit blocks. After the piston rod in the cylinder cavity extends forward to drive the valve core to move forward, the valve core can be sealed against the sealing valve seat to close the outlet flow channel.

2. The hydraulic valve without valve stem and axial flow valve according to claim 1, wherein: A spring is arranged between the piston and the cylinder cover, and two ends of the spring abut against the piston and the cylinder cover respectively. Under the action of the spring, the valve core abuts against the sealing valve seat to seal and close the outlet flow channel.

3. The hydraulic valveless stem axial flow valve according to claim 1 or 2, characterized in that: The valve core is a sleeve valve core.

4. The hydraulic valve without valve rod and axial flow valve according to claim 1 or 2, characterized in that: The inlet valve body and the middle valve body, the outlet valve body and the middle valve body are all fixed by bolts.

5. The hydraulic valve without valve stem and axial flow valve according to claim 1 or 2, characterized in that: The cylinder cover is screwed onto the rear end of the cylinder chamber.

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