Pressure release valve device for preventing rebound impact of nitrogen cylinder

Abstract

The utility model aims to provide the pressure release valve device for preventing rebound impact of the nitrogen cylinder, and the pressure release valve device can effectively buffer gas discharged by high-speed flowing during pressure release, so that the stop block or the plug part is prevented from colliding with the valve body and being damaged under the action of strong impact generated in the pressure release process. The device comprises a main valve body, a hollow control cavity is formed in the main valve body, meanwhile, an air inlet and an air outlet for compressed air to enter are further formed in the main valve body, and the air inlet and the air outlet are communicated with the control cavity; an electromagnetic type sealing pressure control mechanism is arranged in the control cavity, and the electromagnetic type sealing pressure control mechanism further comprises a collision buffering assembly used for achieving the protection effect when the electromagnetic type sealing pressure control mechanism fails instantly.

Description

Technical Field

[0001] The utility model relates to the field of pressure relief valve devices for pneumatic driven stamping equipment, in particular to a pressure relief valve device for preventing rebound impact of a nitrogen cylinder. Background Art

[0002] Pneumatically driven stamping equipment is a type of stamping equipment that uses nitrogen as a power source. It provides stamping force through the high-pressure expansion of nitrogen, thereby realizing the stamping processing of materials. This type of equipment is usually used in situations where high stamping force is required, such as punching, shearing, and forming of metal sheets. Compared with traditional hydraulically driven stamping equipment, pneumatic stamping equipment has many advantages. First, pneumatic stamping equipment uses compressed air as the working medium, which avoids the environmental pollution problems that may be caused by hydraulic oil leakage, and the air source is convenient, no recycling and treatment is required, and it is more environmentally friendly. Secondly, the system response speed of pneumatic stamping equipment is fast and the action is fast, which is suitable for occasions with frequent start and stop, while the response speed of hydraulic stamping equipment is relatively slow, and the oil temperature change will affect the system stability. In addition, the energy consumption of pneumatic stamping equipment is low, especially suitable for small and medium power systems, while the energy consumption of hydraulic stamping equipment is relatively high. In terms of maintenance cost, the system of pneumatic stamping equipment is simple, easy to maintain, and low maintenance cost, while the system of hydraulic stamping equipment is more complex, and the maintenance cost and difficulty are relatively high. At the same time, the initial investment and operating costs of pneumatic stamping equipment are relatively low, and pneumatic stamping equipment is safer, especially in flammable and explosive environments, while hydraulic stamping equipment has the risk of hydraulic oil leakage and fire. Among these pneumatic drive equipment, nitrogen has become the most widely used driving medium for pneumatic stamping equipment due to its low acquisition cost and safe and stable characteristics.

[0003] However, the applicant has found that for common stamping equipment that uses high-pressure nitrogen as a driving medium, during the pressure relief process, it is easy for the pressure to drop instantly during the pressure relief process, causing the top support slider in the hydraulic equipment to rebound and impact rapidly. This not only easily causes the hydraulic press to run unsteadily and the equipment to vibrate, but long-term operation can also cause problems such as oil leakage in the pipeline, loosening or breaking of the fastening screws, etc., posing serious safety hazards to production and processing work.

[0004] In view of the above problems, the utility model provides a pressure relief valve device for preventing rebound impact of a nitrogen cylinder, which can effectively buffer the high-speed flowing and discharged gas during pressure relief, thereby preventing the block or the plug from colliding with the valve body due to the strong impact generated during the pressure relief process. Utility Model Content

[0005] The utility model provides a pressure relief valve device for preventing rebound impact of a nitrogen cylinder, which can effectively buffer the gas discharged by high-speed flow during pressure relief, thereby preventing the block or the plug from colliding with the valve body and being damaged by the strong impact generated during the pressure relief process.

[0006] The above technical objectives of the utility model are achieved through the following technical solutions:

[0007] A pressure relief valve device for preventing rebound impact of a nitrogen cylinder is characterized in that: it includes a main valve body, a hollow control chamber is formed inside the main valve body, and an air inlet and an exhaust port for compressed gas to enter are also formed on the main valve body, and the air inlet and the exhaust port are connected to the control chamber; an electromagnetic sealing pressure control mechanism is arranged inside the control chamber, and the electromagnetic sealing pressure control mechanism also includes a collision buffer component for protecting when the electromagnetic sealing pressure control mechanism fails instantly.

[0008] As a preferred embodiment of the present invention, the electromagnetic sealing pressure control mechanism includes a positioning guide column extending in a vertical direction and a blocking portion sleeved and installed on the positioning guide column, and the blocking portion can reciprocate in a vertical direction along the positioning guide column.

[0009] As a preferred embodiment of the present invention, the collision buffer assembly includes a support top base installed at the bottom of the control cavity, and a buffer spring group arranged between the bottom surface of the blocking portion and the support top base.

[0010] As a preferred embodiment of the present invention, the buffer spring group includes a first buffer spring and a second buffer spring, the bottoms of the first buffer spring and the second buffer spring are fixedly arranged on the support top base, and in a free state, the top height of the first buffer spring is higher than the top height of the second buffer spring.

[0011] As a preferred embodiment of the present invention, the supporting top base is formed with a limiting clamping portion for installing and fixing the buffer spring group.

[0012] As a preferred embodiment of the utility model, a safety cavity extending laterally is formed on the main valve body, the safety cavity is horizontally connected to the side of the control cavity, the exhaust port is connected to the bottom of the safety cavity, and a support-top opening and closing control component is arranged inside the safety cavity.

[0013] As a preferred embodiment of the present invention, a sealing ring is further provided between the support top base and the main valve body.

[0014] In summary, the utility model can achieve the following multiple beneficial effects:

[0015] The pressure relief valve device for preventing the rebound impact of the nitrogen cylinder provided in the solution of the utility model can effectively buffer the high-speed flowing and discharged gas during pressure relief, thereby preventing the block or the plug part from colliding with the valve body under the strong impact generated during the pressure relief process, thereby playing an effective protective role. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 A schematic cross-sectional view of the internal structure of the pressure relief valve device to prevent the rebound impact of the nitrogen cylinder;

[0017] Figure 2 A schematic diagram of the partially enlarged structure of the electromagnetic sealing pressure control mechanism and the collision buffer component in the pressure relief valve device to prevent the rebound impact of the nitrogen cylinder.

[0018] In the figure:

[0019] 1——main valve body, 101——air inlet, 102——exhaust port;

[0020] 2 – control chamber;

[0021] 3——electromagnetic sealing pressure control mechanism, 301——positioning guide column, 302——sealing part;

[0022] 4——collision buffer assembly, 401——supporting top base, 4011——limiting clamping part, 402——buffer spring group, 4021——first buffer spring, 4022——second buffer spring;

[0023] 5 – safety cavity;

[0024] 6——Top-supported opening and closing control assembly;

[0025] 7——Sealing ring. DETAILED DESCRIPTION

[0026] The following specific embodiments are merely explanations of the present invention and are not limitations of the present invention. After reading this specification, those skilled in the art may make modifications to the embodiments without any creative contribution as needed. However, as long as they are within the scope of the claims of the present invention, they are protected by the patent law.

[0027] This solution is achieved through the following technical means:

[0028] Embodiment: In this embodiment, a means and method for realizing a pressure relief valve device for preventing rebound impact of a nitrogen cylinder is provided.

[0029] Refer to the instruction manual Figure 1The schematic diagram of the internal structure of the device is shown in the figure. The device first includes a main valve body 1 made of aluminum alloy with a hollow interior, and the main valve body 1 is also formed with two openings, an air inlet 101 and an exhaust port 102 for compressed gas to enter. At the same time, a similarly hollow safety chamber 5 is extended from the side of the main valve body 1 to achieve that during the pressure relief process, the gas with a relatively high pressure can enter the interior of the pressure relief valve device from the air inlet 101, pass through the control chamber 2 and the safety chamber 5, and finally be discharged from the exhaust port 102. Inside the control chamber 2, an electromagnetic sealing pressure control mechanism 3 is installed, and inside the safety chamber 5, a support-type opening and closing control component 6 is provided.

[0030] Specifically, the electromagnetic sealing pressure control mechanism 3 includes a positioning guide column 301 extending in the vertical direction and a blocking portion 302 sleeved and installed on the positioning guide column 301, and the blocking portion 302 can move back and forth in the vertical direction along the positioning guide column 301. The positioning guide column 301 here is in the shape of a vertical rod, and the blocking portion 302 is in the shape of a truncated cone. At the same time, a mounting hole extending downward and upward is formed at the lower part of the blocking portion 302, so that after the blocking portion 302 is sleeved on the positioning guide column 301, it can complete the sealing and blocking of the upper air inlet 101 with a strong force under the upward push of the electromagnetic drive device, so as to prevent the internal high-pressure gas from leaking out when the starting device connected in front is working normally. Of course, in order to improve the sealing performance, a sealing gasket layer can be covered and bonded on the upper surface of the blocking portion 302 to further improve the sealing performance.

[0031] Also in the control chamber 2, there is a collision buffer component 4 which can provide protection when the high pressure gas is discharged or the electromagnetic support drive device fails. Figure 2 The structure shown is used for explanation. The collision buffer assembly 4 includes a support base 401 installed at the bottom of the control chamber 2, and a buffer spring group 402 arranged between the bottom surface of the blocking portion 302 and the support base 401. First, a ring-shaped and upwardly protruding limit clamping portion 4011 is formed on the support base 401, and the buffer spring group 402 here includes at least a pair of spring members with different radial sizes and different support forces. Figure 2For example, the buffer spring group 402 includes a first buffer spring 4021 and a second buffer spring 4022. The bottoms of the first buffer spring 4021 and the second buffer spring 4022 are fixedly mounted on the support top base 401 by means of sleeve engagement on the aforementioned limiting engagement portion 4011. It should be noted that in a free state, the top height of the first buffer spring 4021 is higher than the top height of the second buffer spring 4022, and the first buffer spring 4021 is thicker and has a larger radial dimension than the second buffer spring 4022. When the electromagnetic drive device loses its supporting effect instantly, causing the blocking part 302 to be pushed downward instantly under the action of high-pressure gas, the upper end surface of the first buffer spring 4021 with a higher top will first contact the bottom surface or the outer periphery of the blocking part 302, thereby initially providing an upward buffering force; and as the blocking part 302 continues to move downward and approaches the second buffer spring 4022, it will be further increased by the second buffer spring 4022 at the moment when its bottom or outer periphery is connected with the second buffer spring 4022, thereby enhancing the buffering effect. It can be seen that as the movable blocking part 302 moves downward, the reverse buffering force it receives from the spring component will gradually increase until the blocking part 302 is completely prevented from moving downward, and it is pushed into a balanced state by the high-pressure gas above, thereby avoiding the collision between the blocking part 302 and the bottom of the main valve body 1, and playing an effective protective role.

[0032] The structure of the aforementioned safety chamber 5 is mainly formed on the side of the main valve body 1, and the safety is connected to the side of the control chamber 2 in a horizontal state, and the exhaust port 102 is connected to the bottom of the safety. Inside the safety chamber 5, a support-type opening and closing control component 6 controlled by a hydraulic mechanical structure is provided. The support-type opening and closing control component 6 can use a common hydraulically driven support mechanism to provide sufficient force. In the event of failure of the electromagnetic support device, the connection channel between the control chamber 2 and the safety chamber 5 is blocked to prevent the high-pressure gas from continuously leaking outward, thereby achieving a further safety protection effect.

[0033] Furthermore, considering the factors of installation coordination and easy maintenance and replacement of components, the aforementioned support top base 401 is generally installed on the main valve body 1 in a detachable structure. At this time, in order to ensure the airtightness of the gap between the two components, a rubber sealing ring 7 can also be provided between the support top base 401 and the main valve body 1.

[0034] The above is only a specific implementation of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various equivalent modifications or replacements within the technical scope disclosed by the utility model, and these modifications or replacements should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A pressure relief valve device for preventing rebound impact of a nitrogen cylinder, characterized in that: The invention comprises a main valve body (1), wherein a hollow control chamber (2) is formed inside the main valve body (1), and an air inlet (101) and an air outlet (102) for compressed gas to enter are also formed on the main valve body (1), wherein the air inlet (101) and the air outlet (102) are connected to the control chamber (2); an electromagnetic sealing pressure control mechanism (3) is arranged inside the control chamber (2), and the electromagnetic sealing pressure control mechanism (3) further comprises a collision buffer component (4) for playing a protective role when the electromagnetic sealing pressure control mechanism (3) fails instantaneously.

2. The pressure relief valve device for preventing rebound impact of nitrogen cylinder according to claim 1 is characterized in that: The electromagnetic sealing pressure control mechanism (3) comprises a positioning guide column (301) extending in a vertical direction and a blocking portion (302) sleeved and mounted on the positioning guide column (301); the blocking portion (302) is capable of reciprocating in a vertical direction along the positioning guide column (301).

3. The pressure relief valve device for preventing rebound impact of nitrogen cylinder according to claim 2 is characterized in that: The collision buffer assembly (4) comprises a top support base (401) installed at the bottom of the control chamber (2), and a buffer spring group (402) arranged between the bottom surface of the blocking portion (302) and the top support base (401).

4. The pressure relief valve device for preventing rebound impact of nitrogen cylinder according to claim 3 is characterized in that: The buffer spring group (402) comprises a first buffer spring (4021) and a second buffer spring (4022); the bottoms of the first buffer spring (4021) and the second buffer spring (4022) are fixedly arranged on the supporting top base (401); and in a free state, the top height of the first buffer spring (4021) is higher than the top height of the second buffer spring (4022).

5. The pressure relief valve device for preventing rebound impact of nitrogen cylinder according to claim 4 is characterized in that: The supporting top base (401) is formed with a limiting engaging portion (4011) for installing and fixing the buffer spring group (402).

6. The pressure relief valve device for preventing rebound impact of nitrogen cylinder according to claim 5 is characterized in that: The main valve body (1) is also formed with a safety chamber (5) extending laterally, the safety chamber (5) being connected to the side of the control chamber (2) in a horizontal state, while the exhaust port (102) is connected to the bottom of the safety chamber (5), and a top-supported opening and closing control component (6) is arranged inside the safety chamber (5).

7. The pressure relief valve device for preventing rebound impact of nitrogen cylinder according to claim 6 is characterized in that: A sealing ring (7) is also provided between the support top base (401) and the main valve body (1).

Images