Pressure release valve

Abstract

According to the pressure release valve, in the pressure release process of the pressure release valve, due to the fact that a valve rod is located in a pressure release hole, up-down and front-back displacement of the valve rod is limited through the pressure release hole, the valve rod and an opening of a pressure release channel are positioned, and therefore when an oil cylinder drives a pressure release column at one end of the valve rod to move to the opening, the valve rod can be opened; when materials in the sealing system enter the pressure relief channel from the high-pressure pipe and then are discharged from the opening of the pressure relief channel, the situation that the valve rod is impacted to move by the impact force of the materials, and consequently the valve rod cannot completely cover the opening of the pressure relief channel to block and seal the opening can be effectively avoided. The utility model belongs to the technical field of pressure release valves.

Description

Technical Field

[0001] The utility model belongs to the technical field of pressure relief valves, and in particular relates to a pressure relief valve. Background Art

[0002] A pressure relief valve is a mechanical mechanism connected to a closed system that allows material or air to be discharged, thereby adjusting and controlling the pressure within the sealed system. During the pressure relief process, if the pressure within the sealed system becomes excessive, the discharged material can easily dislodge the seal that blocks the discharge port, preventing it from fully sealing the discharge port and causing leakage. Utility Model Content

[0003] The purpose of the utility model is to provide a pressure relief valve to solve the technical problems described in the background technology.

[0004] The pressure relief valve includes a valve seat, a valve stem and an oil cylinder, the valve seat is penetrated by a pressure relief channel, one end of the pressure relief channel is provided with a conical hole for hard-sealed connection with a high-pressure pipe, the high-pressure pipe is used to connect with a sealing system, a pressure relief hole is sunken in the side wall of one end of the valve seat, the other end of the pressure relief channel is provided with an opening located on the bottom wall of the pressure relief hole, the area of ​​the opening is smaller than the aperture area of ​​the pressure relief hole, the valve stem is provided with a pressure relief column, the diameter area of ​​the pressure relief column is smaller than the aperture area of ​​the pressure relief hole, the pressure relief column can cover the opening, the oil cylinder drives the valve stem to move in the pressure relief hole, so that the pressure relief column is hard-sealed connected to the opening, approaches and moves away, and a gap is provided between the pressure relief column and the pressure relief hole.

[0005] According to the technical solution, the utility model can achieve the following beneficial effects:

[0006] 1. In the process of pressure relief, the valve stem is located in the pressure relief hole, so as to limit the vertical and forward and backward displacement of the valve stem through the pressure relief hole, and to position the valve stem relative to the opening of the pressure relief channel. Therefore, when the oil cylinder drives the pressure relief column on one end of the valve stem to move the opening, the material in the sealing system enters the pressure relief channel from the high-pressure pipe and is then discharged from the opening of the pressure relief channel. This can effectively prevent the impact force of the material from causing the valve stem to shift, thereby preventing the valve stem from being unable to completely cover the opening of the pressure relief channel and block the seal.

[0007] 2. Since one end of the pressure relief channel is provided with a truncated cone hole which is hard-sealed with the high-pressure pipe, when the sealing system is constructed, the high-pressure pipe connected to the sealing system can be easily connected to and removed from the pressure relief channel.

[0008] In order to further optimize the above technical solution, it can be optionally combined with one or more of the following implementation methods without conflict.

[0009] In some embodiments, a ring groove for installing a low-pressure sealing ring is provided on the outer periphery of the valve seat;

[0010] According to the technical solution, after the valve seat is fixedly installed, the space extending to both ends of the pressure relief channel can be separated and sealed, thereby further improving the sealing performance of the sealed space connected to the high-pressure pipe.

[0011] In some embodiments, a guide hole is sunken in the valve seat, the pressure relief hole is located at the bottom wall of the guide hole, one end of the valve stem provided with the pressure relief column slides in the guide hole, and a gap is provided between the end of the valve stem located in the guide hole and the inner peripheral wall of the guide hole;

[0012] According to the technical solution, the material flowing out of the opening of the pressure relief channel can be discharged through the guide hole, thereby realizing centralized collection of the discharged material and preventing the material from being randomly sprayed from the opening of the pressure relief channel.

[0013] In some embodiments, the orifice of the diversion hole is provided with an outwardly flared diversion slope, and the diameter of the pressure relief column is smaller than the diameter of the valve stem;

[0014] According to the technical solution, the material in the guide hole can be gathered and flowed out through the guide slope, thereby preventing the material from branching and flowing out in a disorderly manner.

[0015] In some embodiments, the connecting end of the valve stem and the pressure relief column is provided with a flow control slope;

[0016] According to the technical solution, the valve stem is driven to move the flow control slope to control the size of the opening for discharging the material, thereby achieving more accurate and convenient adjustment of the pressure in the sealing system.

[0017] In some embodiments, the other end of the valve stem is provided with a snap ring for hooking on the transmission part of the oil cylinder;

[0018] According to the technical solution, the other end of the valve stem can be conveniently mounted on the oil cylinder through the clamping ring, and at the same time, the oil cylinder can drive the valve stem to move more stably. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the specific implementation of the present invention, the following is a brief description of the drawings and reference numerals required to be used in the description of the specific implementation.

[0020] Figure 1 It is the right shaft exploded view of the utility model;

[0021] Figure 2 This is a schematic diagram of the left axis structure of the valve seat of the utility model;

[0022] Figure 3 It is a cross-sectional view of the present utility model.

[0023] Reference numerals:

[0024] 1. Valve seat; 11. Pressure relief channel; 12. Ring groove; 2. Cone hole; 21. High-pressure pipe; 3. Pressure relief hole; 31. Opening; 32. Diversion hole; 33. Diversion slope; 4. Valve stem; 41. Pressure relief column; 42. Flow control slope; 43. Snap ring. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solution and advantages of the present invention more clear, the present invention is further described in detail with reference to the accompanying drawings. In addition, in the following description, descriptions of well-known structures and technologies are omitted to avoid unnecessary confusion of the concept of the present invention.

[0026] like Figures 1 to 3 As shown, this specific embodiment provides a pressure relief valve, which includes a valve seat 1, a valve stem 4 and an oil cylinder.

[0027] A pressure relief channel 11 passes through the valve seat 1 , and one end of the pressure relief channel 11 is provided with a frustum hole 2 for hard-sealed connection with a high-pressure pipe 21 , and the high-pressure pipe 21 is used to connect with a sealing system.

[0028] A flow guide hole 32 is recessed into the sidewall of one end of the valve seat 1, with an outwardly flared flow guide slope 33 at its opening. A pressure relief hole 3 is recessed into the bottom surface of the flow guide hole 32. The other end of the pressure relief channel 11 is provided with an opening 31 located in the bottom wall of the pressure relief hole 3. The area of ​​the opening 31 is smaller than the diameter of the pressure relief hole 3.

[0029] The valve stem 4 is provided with a pressure relief column 41. The diameter of the pressure relief column 41 is smaller than the diameter of the pressure relief hole 3. The pressure relief column 41 can cover the opening 31. The oil cylinder drives the valve stem 4 to move within the pressure relief hole 3, so that the pressure relief column 41 is hard-sealed with the opening 31, moving closer to and farther away from the pressure relief column 41. A gap is provided between the pressure relief column 41 and the pressure relief hole 3. One end of the valve stem 4 provided with the pressure relief column 41 slides within the guide hole 32. A gap is provided between the end of the valve stem 4 located within the guide hole 32 and the inner circumferential wall of the guide hole 32. The diameter of the pressure relief column 41 is smaller than that of the valve stem 4. The connection end between the valve stem 4 and the pressure relief column 41 is provided with a flow control slope 42.

[0030] The other end of the valve stem 4 is provided with a snap ring 43 for hooking on the transmission part of the oil cylinder.

[0031] The following is a working description of the pressure relief valve.

[0032] When the sealing system is kept in sealing state, the oil cylinder driven valve rod 4 is moved in the pressure relief hole 3, so that the pressure relief column 41 is hard sealed with the opening 31.

[0033] When the sealing system is pressure released, the oil cylinder driven valve rod 4 is moved in the pressure relief hole 3, so that the pressure relief column 41 is separated from the opening 31, until the flow control inclined surface 42 is moved to the side of the orifice of the flow guide hole 32; at this time, the material or air in the sealing system flows into the pressure relief channel 11, the pressure relief hole 3 and the flow guide hole 32 in turn through the high pressure pipe 21, and then flows out from the orifice of the flow guide hole 32.

[0034] It should be understood that the above specific embodiments of the present application are only used for illustrative or explanatory purposes of the principles of the present application, and do not constitute a limitation on the present application. Therefore, any modification, equivalent replacement, improvement, etc. made without departing from the spirit and scope of the present application shall be included in the protection scope of the present application. In addition, the appended claims of the present application are intended to cover all changes and modifications falling within the scope and boundary of the appended claims, or the equivalent forms of such scope and boundary.

Claims

1. A pressure relief valve, characterized in that: The invention comprises a valve seat (1), a valve stem (4) and an oil cylinder, wherein the valve seat (1) is penetrated by a pressure relief channel (11), one end of the pressure relief channel (11) is provided with a truncated cone hole (2) for hard sealing connection with a high-pressure pipe (21), the high-pressure pipe (21) is used to connect with a sealing system, a pressure relief hole (3) is sunken on the side wall of one end of the valve seat (1), and the other end of the pressure relief channel (11) is provided with an opening (31) located on the bottom wall of the pressure relief hole (3), and the area of ​​the opening (31) is smaller than that of the pressure relief hole (3). The aperture area of ​​the pressure relief hole (3) is selected from the following aspects: the valve stem (4) is provided with a pressure relief column (41), the diameter area of ​​the pressure relief column (41) is smaller than the aperture area of ​​the pressure relief hole (3), the pressure relief column (41) can cover the opening (31), the oil cylinder drives the valve stem (4) to move in the pressure relief hole (3), so that the pressure relief column (41) and the opening (31) are hard-sealed and connected, close to and away from each other, and a gap is provided between the pressure relief column (41) and the pressure relief hole (3).

2. A pressure relief valve according to claim 1, characterized in that: The outer periphery of the valve seat (1) is provided with a ring groove (12) for installing a low-pressure sealing ring.

3. A pressure relief valve according to claim 1, characterized in that: The valve seat (1) is sunken with a guide hole (32), the pressure relief hole (3) is located at the bottom wall of the guide hole (32) and is sunken, the valve stem (4) is provided with one end of the pressure relief column (41) and is located in the guide hole (32) and slides, and a gap is provided between the end of the valve stem (4) located in the guide hole (32) and the inner peripheral wall of the guide hole (32).

4. A pressure relief valve according to claim 3, characterized in that: The orifice of the guide hole (32) is provided with a guide slope (33) that expands outwards, and the diameter of the pressure relief column (41) is smaller than the diameter of the valve stem (4).

5. A pressure relief valve according to claim 4, characterized in that: A flow control slope (42) is provided at the connection end between the valve stem (4) and the pressure relief column (41).

6. The pressure relief valve according to claim 1, characterized in that: The other end of the valve stem (4) is provided with a snap ring (43) for hooking on the transmission part of the oil cylinder.

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