Overvoltage and undervoltage emergency cut-off valve

Abstract

The utility model belongs to the technical field of emergency cut-off valves, and particularly relates to an over-voltage and under-voltage emergency cut-off valve which comprises a control device, a valve, a clutch mechanism and a transmission mechanism, a supporting frame is fixedly connected to the top of the valve, a connecting sleeve is fixedly connected to the outer wall of the supporting frame in a sleeved mode, and an actuator is fixedly connected to the top of the supporting frame. The control device is fixedly connected with the top of the actuator, the clutch mechanism and the transmission mechanism are both arranged in the actuator, a valve rod is rotatably inserted in the valve, and the output end of the clutch mechanism is connected with the input end of the valve rod. The whole structure of the emergency cut-off valve is of a top-mounted type, especially on site, so that the whole replacement of an actuator is facilitated, and the production is quickly recovered; the clutch mechanism adopts a two-shaft eccentric type, so that processing, manufacturing, mounting and adjusting are facilitated; the self-locking mechanism adopts a ratchet wheel and pawl mechanism, is simple in structure, convenient to adjust, low in precision requirement, greatly reduced in cost and suitable for field working conditions, and ensures safe and reliable production.

Description

An over / under voltage emergency shut-off valve Technical Field

[0001] This utility model relates to the field of emergency shut-off valve technology, and in particular to an over / under pressure emergency shut-off valve. Background Technology

[0002] Emergency shut-off valves can automatically cut off oil and gas pipeline leaks or bursts, thus making foreseeable risks controllable and minimizing the losses caused by such risks. Currently used emergency shut-off valves include mechanical and hydraulic types.

[0003] However, the existing emergency shut-off valves have complex mechanical structures, especially the self-locking module, which requires high machining precision and is difficult to adapt to harsh outdoor environments; moreover, the overall structure is side-mounted, making it difficult to operate when replacing the actuator on site. Summary of the Invention

[0004] The purpose of this utility model is to solve the problems mentioned in the background art, such as the complex mechanical structure of the emergency shut-off valve, which makes it difficult to adapt to harsh outdoor environments and difficult to operate when replacing the actuator. Therefore, an over / under pressure emergency shut-off valve is proposed.

[0005] To achieve the above objectives, the present invention adopts the following technical solution:

[0006] An over / under pressure emergency shut-off valve includes a control device, a valve, a clutch mechanism, and a transmission mechanism. A support frame is fixedly connected to the top of the valve, and a connecting sleeve is fixedly sleeved on the outer wall of the support frame. An actuator is fixedly connected to the top of the support frame. The control device is fixedly connected to the top of the actuator. The clutch mechanism and the transmission mechanism are both disposed within the actuator. A valve stem is rotatably inserted into the valve. The output end of the clutch mechanism is connected to the input end of the valve stem. The output end of the transmission mechanism is connected to the input end of the clutch mechanism. A self-locking mechanism corresponding to the clutch mechanism is fixedly connected within the actuator. An electric valve closing assembly and a manual valve closing assembly are fixedly connected to the outer wall of the actuator.

[0007] Preferably, a pressure-feeding pipeline is connected between the actuator and the valve.

[0008] Preferably, the clutch mechanism includes a drive shaft, a drive disc is fixedly connected to the bottom of the drive shaft, and a driven disc corresponding to the drive disc is fixedly connected to the top of the valve stem.

[0009] Preferably, the self-locking mechanism includes a pawl, and a ratchet corresponding to the pawl is fixedly sleeved on the valve stem.

[0010] Preferably, one end of the actuator is rotatably connected to a handwheel assembly corresponding to the transmission mechanism.

[0011] Preferably, the support frame is threaded into the top of the valve.

[0012] Compared with the prior art, the present invention has the following beneficial effects:

[0013] 1. The overall structure of this utility model adopts an upper-mounted design, which is especially convenient for the complete replacement of the actuator on site, allowing for a rapid resumption of production.

[0014] 2. The clutch mechanism in this utility model adopts a two-axis eccentric type, which is convenient for processing, manufacturing, installation and adjustment; the self-locking mechanism adopts a ratchet and pawl mechanism, which has a simple structure, is easy to adjust, has low precision requirements, significantly reduces costs, and is suitable for field working conditions, ensuring safe and reliable production. Attached Figure Description

[0015] Figure 1 is a schematic diagram of the internal structure of an over / under pressure emergency shut-off valve proposed in this utility model;

[0016] Figure 2 is a schematic diagram of the external structure of an over / under pressure emergency shut-off valve proposed in this utility model;

[0017] Figure 3 is a schematic diagram of the clutch mechanism in an over / under pressure emergency shut-off valve proposed in this utility model.

[0018] Figure 4 is a structural schematic diagram of the self-locking mechanism of the over- and under-voltage emergency shut-off valve proposed in this utility model.

[0019] In the diagram: 101-Control device; 102-Clutch mechanism; 103-Electric valve closing assembly; 104-Manual valve closing assembly; 105-Transmission mechanism; 106-Self-locking mechanism; 107-Support frame; 108-Valve; 109-Pressure tapping pipeline; 110-Handwheel assembly; 201-Actuator; 202-Connecting sleeve; 301-Drive shaft; 302-Drive disc; 303-Driven disc; 304-Valve stem; 401-Ratchet; 402-Pawl. Detailed Implementation

[0020] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0021] Referring to Figures 1-4, an over / under voltage emergency shut-off valve includes a control device 101, a valve 108, a clutch mechanism 102, and a transmission mechanism 105. A support frame 107 is fixedly connected to the top of the valve 108, and the support frame 107 is threaded into the top of the valve 108.

[0022] In this embodiment, a connecting sleeve 202 is fixedly sleeved on the outer wall of the support frame 107 to provide protection. An actuator 201 is fixedly connected to the top of the support frame 107. The control device 101 is fixedly connected to the top of the actuator 201. The clutch mechanism 102 and the transmission mechanism 105 are both located inside the actuator 201.

[0023] In this embodiment, the clutch mechanism 102 includes a drive shaft 301, a drive disk 302 is fixedly connected to the bottom of the drive shaft 301 to drive the driven disk 303 to rotate, and a driven disk 303 corresponding to the drive disk 302 is fixedly connected to the top of the valve stem 304.

[0024] In this embodiment, a pressure-feeding pipeline 109 is connected between the actuator 201 and the valve 108. A valve stem 304 is rotatably inserted into the valve 108. The output end of the clutch mechanism 102 is connected to the input end of the valve stem 304. The output end of the transmission mechanism 105 is connected to the input end of the clutch mechanism 102, which is used to control the clutch mechanism 102.

[0025] In this embodiment, a self-locking mechanism 106 corresponding to the clutch mechanism 102 is fixedly connected inside the actuator 201. The self-locking mechanism 106 includes a pawl 402, and a ratchet 401 corresponding to the pawl 402 is fixedly sleeved on the valve stem 304. An electric valve closing assembly 103 and a manual valve closing assembly 104 are fixedly connected to the outer wall of the actuator 201, and a handwheel assembly 110 corresponding to the transmission mechanism 105 is rotatably connected to one end of the actuator 201.

[0026] In this embodiment, the driven disc 303 in the clutch mechanism 102 is connected to the end of the valve stem 304 via a key, and the drive disc 302 is also connected to the drive shaft 301 via a key. The drive shaft 301 is connected to the motor via a pair of gears. Driven by the motor, the driven disc 303 and the drive disc 302 are driven by the gears, thereby rotating the valve stem 304 and opening the valve 108. When the valve 108 is closed, the valve stem 304 rotates under the action of spring force through an over / under voltage automatic triggering mechanism or a manual / electric unlocking self-locking mechanism, thereby closing the valve 108.

[0027] In this embodiment, the emergency shut-off valve is top-mounted, that is, the valve 108 and the actuator are arranged in an upper and lower manner. When it is installed in the pipeline and the actuator 201 malfunctions and needs to be replaced, only the actuator 201 needs to be removed, which does not affect normal production and is convenient and quick.

[0028] In this embodiment, the drive disc 302 and the driven disc 303 adopt an eccentric structure. The drive disc 302 drives the driven disc 303 to rotate 45 degrees to achieve a separated state. The valve 108 remains open, and the self-locking mechanism 106 remains locked. The valve stem 304 rotates clockwise under the drive of the driven disc 303, and the ratchet 401 also rotates clockwise. When the valve 108 reaches the open state, the spring is compressed. Under the restoring force of the spring, the ratchet 401 is caused to rotate counterclockwise. The ratchet 401 is self-locked by the pawl 402 and cannot rotate counterclockwise. The self-locking mechanism 106 locks, and the valve 108 opens.

[0029] In this embodiment, the clutch mechanism adopts a two-axis eccentric type, which is convenient for processing, manufacturing, installation and adjustment; the self-locking mechanism adopts a ratchet and pawl mechanism, which is simple in structure, easy to adjust, has low precision requirements, significantly reduces costs, and is suitable for field working conditions, ensuring safe and reliable production; the overall structure adopts an upper-mounted type, which is especially convenient for the overall replacement of the actuator in the field, and can quickly restore production.

[0030] The above description is only a preferred embodiment of the present utility model, but the protection scope of the present utility model is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the technical scope disclosed in the present utility model, based on the technical solution and the inventive concept of the present utility model, should be included within the protection scope of the present utility model.

Claims

1. An over / under voltage emergency shut-off valve, comprising a control device (101), a valve (108), a clutch mechanism (102), and a transmission mechanism (105), characterized in that: A support frame (107) is fixedly connected to the top of the valve (108). A connecting sleeve (202) is fixedly sleeved on the outer wall of the support frame (107). An actuator (201) is fixedly connected to the top of the support frame (107). The control device (101) is fixedly connected to the top of the actuator (201). The clutch mechanism (102) and the transmission mechanism (105) are both located inside the actuator (201). A valve stem (304) is rotatably inserted inside the valve (108). The output end of the clutch mechanism (102) is connected to the input end of the valve stem (304). The output end of the transmission mechanism (105) is connected to the input end of the clutch mechanism (102). A self-locking mechanism (106) corresponding to the clutch mechanism (102) is fixedly connected inside the actuator (201). An electric valve closing assembly (103) and a manual valve closing assembly (104) are fixedly connected to the outer wall of the actuator (201).

2. An under-voltage emergency shut-off valve according to claim 1, characterized in that: A pressure-sensing pipeline (109) is connected between the actuator (201) and the valve (108).

3. An under-voltage emergency shut-off valve according to claim 1, wherein: The clutch mechanism (102) includes a drive shaft (301), a drive disc (302) is fixedly connected to the bottom of the drive shaft (301), and a driven disc (303) corresponding to the drive disc (302) is fixedly connected to the top of the valve stem (304).

4. An under-voltage emergency shut-off valve according to claim 1, wherein: The self-locking mechanism (106) includes a pawl (402), and a ratchet (401) corresponding to the pawl (402) is fixedly sleeved on the valve stem (304).

5. An ultra-under-voltage emergency shut-off valve according to claim 1, characterized in that: One end of the actuator (201) is rotatably connected to a handwheel assembly (110) corresponding to the transmission mechanism (105).

6. An ultra-under-voltage emergency shut-off valve according to claim 1, characterized in that: The support frame (107) is threaded into the top of the valve (108).

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