Side door assembly of ram blowout preventer

Abstract

The utility model relates to the field of blowout preventers, and discloses a ram blowout preventer side door assembly which comprises a manual locking short section, a manual locking shaft and an oil cylinder shell, a piston rod is arranged in the oil cylinder shell, one end of the oil cylinder shell is provided with a ram assembly, and the other end of the oil cylinder shell is connected with the manual locking shaft. A manual locking rod clamped with the piston rod is arranged on the manual locking shaft; and the manual locking shaft is connected with the manual locking short section. Hydraulic oil is injected into the male connector, the hydraulic oil pushes the piston rod to move rightwards, then the flashboard assembly is pushed out, hydraulic oil is injected into the female connector, the hydraulic oil pushes the piston rod to move leftwards, and the flashboard assembly is pulled back. When manual driving is needed, the manual locking short section is screwed in or out, the piston rod is pushed or pulled back by the manual locking short section so as to control the flashboard assembly, and the hydraulic control device has the function of controlling the side door of the blowout preventer hydraulically and manually.

Description

Technical Field

[0001] The utility model relates to the technical field of blowout preventers, in particular to a side door assembly of a gate blowout preventer. Background Art

[0002] BOP is a safety sealing wellhead device used to close the wellhead during oil, well repair and completion operations to prevent blowout accidents. At present, most of the existing gate blowout preventers are divided into two types: hydraulic and manual. The main disadvantage of manual blowout preventers is that the switch is manually operated, the speed is slow and it is inconvenient to maintain and manage. The hydraulic gate blowout preventer will fail when the hydraulic system fails. Therefore, it is necessary to solve the problem of both hydraulic and manual functions. Utility Model Content

[0003] The utility model aims to provide a gate blowout preventer side door assembly, which solves the problem of having the functions of a hydraulic blowout preventer and a manual blowout preventer mentioned in the background technology.

[0004] The utility model adopts the following technical solutions:

[0005] The utility model discloses a side door assembly of a gate blowout preventer, which comprises a manual locking nipple, a manual locking shaft and an oil cylinder housing. A piston rod which is movable and in sealing contact is arranged in the cavity of the oil cylinder housing.

[0006] A gate assembly is provided at one end of the cylinder housing, and the gate assembly is connected to the piston rod. The other end of the cylinder housing is provided with the manual locking shaft, and a plurality of slidable manual locking rods are inserted into the manual locking shaft along the circumferential direction. One end of the manual locking rod is clamped with the piston rod, and the other end extends along the axial direction of the manual locking shaft.

[0007] The manual locking nipple is threadably matched with the manual locking shaft. When the blowout preventer is in a manual state, the manual locking nipple abuts against each of the manual locking rods.

[0008] Furthermore, the manual locking pup joint includes a pup joint sleeve, a pup joint threaded hole is provided on the inner side of one end of the pup joint sleeve, and the pup joint threaded hole is threadedly connected to the manual locking shaft.

[0009] A short-joint protrusion is arranged on the outer wall of the short-joint sleeve away from the short-joint threaded hole. When the blowout preventer is in a hydraulic state, the short-joint protrusion abuts against the oil cylinder housing.

[0010] A short-section sealing ring groove is arranged on the short-section sleeve at a side of the short-section protrusion away from the short-section threaded hole, and a sealing ring which is sealed and matched with the oil cylinder housing is arranged on the short-section sealing ring groove.

[0011] A gasket is arranged on the inner wall of the port of the short section sleeve adjacent to the short section threaded hole. When the blowout preventer is in a manual state, the gasket abuts against each of the manual locking rods.

[0012] A plurality of short section locking holes are arranged on the cylinder walls at both ends of the short section sleeve.

[0013] Furthermore, the manual locking shaft includes a shaft body, one end of the shaft body is provided with a locking shaft locking hole, the other end of the shaft body is provided with a boss on the outer wall, and the boss is provided with a thread that cooperates with the cylinder housing.

[0014] A plurality of manual locking rod through holes are arranged in an annular manner at equal intervals inside the boss, and the manual locking rod through holes are plug-fitted with the manual locking rod.

[0015] A manual locking rod through slot is provided on the outer wall of the shaft body at a position corresponding to the manual locking rod through hole along the axial direction, the manual locking rod through slot is connected to the manual locking rod through hole, and the manual locking rod through slot is embedded and matched with the manual locking rod.

[0016] A locking rod sealing ring groove is arranged in the manual locking rod through hole, and a sealing ring matched with the manual locking rod is arranged in the locking rod sealing ring groove.

[0017] The shaft body is provided with an outer wall thread on an end away from the boss, which is threadedly matched with the short section threaded hole.

[0018] A second manual locking shaft sealing ring groove is arranged on one end of the boss close to the locking hole of the locking shaft, and a sealing ring which is sealed with the oil cylinder housing is arranged on the second manual locking shaft sealing ring groove.

[0019] An inner cavity is arranged in the manual locking shaft, two manual locking shaft sealing ring grooves are arranged on the inner cavity, and a sealing ring cooperating with the piston rod is arranged on the manual locking shaft sealing ring groove.

[0020] Furthermore, a gasket protrusion is provided on the inner ring of the gasket, which cooperates with the through groove of the manual locking rod.

[0021] Furthermore, the manual locking rod comprises a manual locking rod body, a manual locking rod fixing end is arranged at one end of the manual locking rod, and the manual locking rod fixing end is arranged as a protruding structure with a groove.

[0022] The fixed end of the manual locking rod is engaged with the piston rod.

[0023] Furthermore, a piston rod cone is arranged in the middle of the piston rod, a piston rod sealing ring groove is arranged on the piston rod cone, and a sealing ring cooperating with the inner wall of the oil cylinder housing is arranged on the piston rod sealing ring groove.

[0024] A piston rod protrusion is arranged on the piston rod on the side of the piston rod cone facing the manual locking shaft, a piston rod locking groove is formed between the piston rod protrusion and the piston rod cone, and the piston rod protrusion, the piston rod locking groove and the fixed end of the manual locking rod are engaged with each other.

[0025] A central through hole is arranged on the central axis of the piston rod.

[0026] Furthermore, the cylinder housing is provided with an inner cavity of the cylinder housing and a gate connecting cavity, and the inner cavity of the cylinder housing is connected with the gate connecting cavity through a piston rod cavity.

[0027] The inner cavity of the oil cylinder housing is slidably connected to the piston rod cylindrical table. The inner wall of the inner cavity of the oil cylinder housing is provided with an inner thread of the oil cylinder housing on one end close to the manual locking shaft. The inner thread of the oil cylinder housing is matched with the boss thread.

[0028] Two oil cylinder housing sealing ring grooves are arranged in the piston rod cavity, and sealing rings which are sealed with the piston rod are arranged on the oil cylinder housing sealing ring grooves.

[0029] The gate assembly is arranged in the gate connecting cavity, a guide rod hole is arranged on the gate connecting cavity, a guide rod is arranged in the guide rod hole, and the guide rod is slidingly matched with the gate assembly.

[0030] A male joint and a female joint are installed on the oil cylinder housing, and the piston rod truncated cone is limited and sealed between the oil outlets of the male joint and the female joint.

[0031] Furthermore, the gate assembly is connected to the piston rod through a piston gate connector.

[0032] The piston gate plate connector is configured in a boss shape, and the gate plate assembly is provided with a clamping groove at one end that cooperates with the piston gate plate connector, and the gate plate assembly is clamped in the piston gate plate connector through the clamping groove.

[0033] The piston gate plate connector is threadedly connected to the piston rod end thread of the piston rod, and the piston gate plate connector is provided with a top screw, and the inner end of the top screw is against the thread of the piston rod end.

[0034] Compared with the prior art, the beneficial technical effects of the utility model are:

[0035] The utility model provides the piston rod truncated platform in the middle position of the piston rod in the oil cylinder housing, the piston rod truncated platform and the inner cavity of the oil cylinder housing are sealed by a sealing ring and are limited between the oil outlets of the male joint and the female joint. If hydraulic oil is injected into the male joint, the hydraulic oil pushes the piston rod truncated platform to move rightward, and then drives the gate assembly connected to the piston rod to move rightward. If hydraulic oil is extracted from the male joint and hydraulic oil is injected into the female joint at the same time, the hydraulic oil pushes the piston rod truncated platform to move leftward, and then drives the gate assembly connected to the piston rod. The assembly moves to the left to realize hydraulically driven control of the gate plate. When manual drive is required, the manual locking short section is rotated and screwed out, and the direction is reversed. The short section protrudes outward, and the short section threaded hole is threaded inwardly connected to the manual locking shaft. A rivet, pin or crowbar is inserted into the short section locking hole, and the manual locking short section is screwed inward. The manual locking short section will push the piston rod through the manual locking rod and then push the gate plate assembly, so that the closing or opening of the gate plate can be realized manually. The utility model has the functions of hydraulic and manual control of the blowout preventer side door, which is convenient and fast, and the idea is ingenious. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] The utility model will be further described below in conjunction with the accompanying drawings.

[0037] Figure 1 It is a cross-sectional view of the side door assembly of the gate blowout preventer of the utility model in a hydraulic state;

[0038] Figure 2 It is a cross-sectional view of the side door assembly of the gate blowout preventer of the utility model in the manual state;

[0039] Figure 3 This is the external structure diagram of the manual locking nipple of the utility model;

[0040] Figure 4 This is the internal structure diagram of the manual locking nipple of the utility model;

[0041] Figure 5 This is a schematic diagram of the gasket structure of the utility model;

[0042] Figure 6 This is a schematic diagram of the structure of the manual locking shaft of the utility model;

[0043] Figure 7 This is a side view of the manual locking shaft of the utility model;

[0044] Figure 8 This is the appearance diagram of the manual locking shaft of the utility model;

[0045] Fig. 9 This is a schematic diagram of the structure of the manual locking rod of the utility model;

[0046] Fig.10 This is a schematic diagram of the structure of the oil cylinder and piston rod of the utility model;

[0047] Fig.11 This is a schematic diagram of the appearance of the gate assembly of the utility model.

[0048] Explanation of the reference numerals: 1. Manual locking nipple; 1-1. Nipple threaded hole; 1-2. Nipple locking hole; 1-3. Nipple protrusion; 1-4. Nipple sealing ring groove; 1-5. Gasket; 1-6. Nipple sleeve; 1-7. Gasket protrusion; 2. Manual locking shaft; 2-1. Manual locking rod through hole; 2-2. Locking rod sealing ring groove; 2-3. Manual locking shaft sealing ring groove 1; 2-4. Manual locking shaft sealing ring groove 2; 2-5. Locking shaft locking hole; 2-6. Outer wall thread; 2-7. Inner cavity; 2-8. Boss; 2-9. Manual locking rod through groove; 2-10. Shaft body; 3. Cylinder housing; 3-1. Cylinder housing seal Ring groove; 3-2, cylinder housing cavity; 3-3, piston rod cavity; 3-4, gate connection cavity; 3-5, guide rod hole; 3-6, cylinder housing internal thread; 4, manual locking rod; 4-1, manual locking rod body; 4-2, manual locking rod fixed end; 5, piston rod; 5-1, piston rod protrusion; 5-2, piston rod locking groove; 5-3, center through hole; 5-4, piston rod sealing ring groove; 5-5, piston rod end thread; 5-6, piston rod cone; 6, piston gate connector; 6-1, top screw; 7, gate assembly; 7-1, gate through hole; 7-2, clamping groove; 8, guide rod; 9, male connector; 10, female connector. DETAILED DESCRIPTION

[0049] In order to make the technical problems, technical solutions and beneficial effects to be solved by the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments.

[0050] like Figure 1 and Figure 2 As shown, this embodiment discloses a side door assembly of a gate blowout preventer, including a manual locking nipple 1, a manual locking shaft 2 and a cylinder housing 3, wherein a piston rod 5 that is movable and in sealing contact is arranged in the cavity of the cylinder housing 3.

[0051] A gate assembly 7 is provided at one end of the cylinder housing 3, and the gate assembly 7 is connected to the piston rod 5. A manual locking shaft 2 is provided at the other end of the cylinder housing 3. A plurality of slidable manual locking rods 4 are inserted into the manual locking shaft 2 along the circumferential direction. One end of the manual locking rod 4 is clamped with the piston rod 5, and the other end extends along the axial direction of the manual locking shaft 2.

[0052] The manual locking nipple 1 is threadedly matched with the manual locking shaft 2 . When the blowout preventer is in a manual state, the manual locking nipple 1 abuts against each manual locking rod 4 .

[0053] like Figures 1 to 5 As shown, in this embodiment, the manual locking pup joint 1 includes a pup joint sleeve 1 - 6 , and a pup joint threaded hole 1 - 1 is provided on the inner side of one end of the pup joint sleeve 1 - 6 , and the pup joint threaded hole 1 - 1 is threadedly connected to the manual locking shaft 2 .

[0054] A short joint protrusion 1-3 is provided on the outer wall of the short joint sleeve 1-6 away from the short joint threaded hole 1-1. When the blowout preventer is in a hydraulic state, the short joint protrusion 1-3 abuts against the cylinder housing 3.

[0055] A short section sealing ring groove 1-4 is provided on the short section sleeve 1-6 at a side of the short section protrusion 1-3 away from the short section threaded hole 1-1, and a sealing ring that seals with the oil cylinder housing 3 is provided on the short section sealing ring groove 1-4.

[0056] A gasket 1-5 is provided on the inner wall of the port of the short section sleeve 1-6 adjacent to the short section threaded hole 1-1. When the blowout preventer is in manual mode, the gasket 1-5 abuts against each manual locking rod 4. The inner ring of the gasket 1-5 is provided with a gasket protrusion 1-7 that matches with the manual locking rod through groove 2-9. Twisting the manual locking short section 1 will push the piston rod 5 against the manual locking rod 4 through the gasket 1-5 to drive the gate assembly 7.

[0057] The cylinder walls at both ends of the short section sleeve 1-6 are provided with a plurality of short section locking holes 1-2. When the short section 1 is manually locked during screwing, a pin rod can be inserted into the short section locking hole 1-2 to assist the screwing action.

[0058] like Figures 6 to 8 As shown, in this embodiment, the manual locking shaft 2 includes a shaft body 2-10, and a locking shaft locking hole 2-5 is provided at one end of the shaft body 2-10. When the manual locking shaft 2 is screwed, a pin rod can be inserted into the locking shaft locking hole 2-5 to assist the screwing action.

[0059] A boss 2-8 is arranged on the outer wall of the other end of the shaft body 2-10, and a thread matching with the cylinder housing 3 is arranged on the boss 2-8.

[0060] A plurality of manual locking rod through holes 2 - 1 are arranged in an annular shape at equal intervals inside the boss 2 - 8 , and the manual locking rod through holes 2 - 1 are plugged and matched with the manual locking rod 4 .

[0061] A manual locking rod through slot 2-9 is provided on the outer wall of the shaft body 2-10 at a position corresponding to the manual locking rod through hole 2-1 along the axial direction. The manual locking rod through slot 2-9 is connected to the manual locking rod through hole 2-1, and the manual locking rod through slot 2-9 is embedded and matched with the manual locking rod 4.

[0062] A locking rod sealing ring groove 2 - 2 is arranged in the manual locking rod through hole 2 - 1 , and a sealing ring cooperating with the manual locking rod 4 is arranged in the locking rod sealing ring groove 2 - 2 .

[0063] An outer wall thread 2-6 that matches the threaded hole 1-1 of the short section is provided on the outer wall of the shaft body 2-10 at one end away from the boss 2-8.

[0064] A manual locking shaft sealing ring groove 2-4 is arranged on one end of the boss 2-8 close to the locking shaft locking hole 2-5, and a sealing ring which seals with the oil cylinder housing 3 is arranged on the manual locking shaft sealing ring groove 2-4.

[0065] An inner cavity 2-7 is arranged in the manual locking shaft 2, two manual locking shaft sealing ring grooves 2-3 are arranged on the inner cavity 2-7, and a sealing ring cooperating with the piston rod 5 is arranged on the manual locking shaft sealing ring groove 2-3.

[0066] like Fig. 9 As shown, the manual locking rod 4 includes a manual locking rod body 4-1, and a manual locking rod fixed end 4-2 is set at one end of the manual locking rod 4. The manual locking rod fixed end 4-2 is set as a protruding structure with a groove, and the manual locking rod fixed end 4-2 is snap-fitted with the piston rod 5.

[0067] like Figure 1 , Figure 2 and Fig.10 As shown, in this embodiment, a piston rod cone 5-6 is provided in the middle of the piston rod 5, a piston rod sealing ring groove 5-4 is provided on the piston rod cone 5-6, and a sealing ring that cooperates with the inner wall of the cylinder housing 3 is provided on the piston rod sealing ring groove 5-4.

[0068] A piston rod protrusion 5-1 is set on the piston rod 5 on the side of the piston rod cone 5-6 facing the manual locking shaft 2, and a piston rod locking groove 5-2 is formed between the piston rod protrusion 5-1 and the piston rod cone 5-6. The piston rod protrusion 5-1, the piston rod locking groove 5-2 are engaged with the manual locking rod fixed end 4-2.

[0069] The central axis of the piston rod 5 is provided with a central through hole 5-3. The central through hole 5-3 can pass mud and sand, prevent mud and sand from blocking, and prevent manual tightening from being difficult.

[0070] like Figure 1 , Figure 2 and Fig.10 As shown, in this embodiment, a cylinder housing inner cavity 3-2 and a gate connecting cavity 3-4 are provided in the cylinder housing 3, and the cylinder housing inner cavity 3-2 and the gate connecting cavity 3-4 are connected through the piston rod cavity 3-3.

[0071] The inner cavity 3-2 of the cylinder housing is slidably connected with the piston rod round table 5-6. The inner wall of the inner cavity 3-2 of the cylinder housing is provided with an inner thread 3-6 of the cylinder housing on one end close to the manual locking shaft 2. The inner thread 3-6 of the cylinder housing is threadably connected with the boss 2-8.

[0072] Two cylinder housing sealing ring grooves 3 - 1 are arranged in the piston rod cavity 3 - 3 , and sealing rings which are sealed with the piston rod 5 are arranged on the cylinder housing sealing ring grooves 3 - 1 .

[0073] A gate assembly 7 is arranged in the gate connecting cavity 3-4, a guide rod hole 3-5 is arranged on the gate connecting cavity 3-4, a guide rod 8 is arranged in the guide rod hole 3-5, and the guide rod 8 is slidingly matched with the gate assembly 7.

[0074] A male connector 9 and a female connector 10 are installed on the cylinder housing 3, and the piston rod cone 5-6 is limited and sealed between the oil outlets of the male connector 9 and the female connector 10. The oil outlets of the male connector 9 and the female connector 10 are connected to the inner cavity 3-2 of the cylinder housing.

[0075] like Figure 1 , Figure 2 and Fig.11 As shown, in this embodiment, the gate assembly 7 is connected to the piston rod 5 through the piston gate connector 6.

[0076] The piston gate connector 6 is configured as a boss shape, and the gate assembly 7 is provided with a snap-in groove 7-2 at one end that cooperates with the piston gate connector 6, and the gate assembly 7 is snap-in connected to the piston gate connector 6 through the snap-in groove 7-2.

[0077] The piston gate connector 6 is threadedly connected to the piston rod end thread 5-5 of the piston rod 5. The piston gate connector 6 is provided with a top screw 6-1, and the inner end of the top screw 6-1 abuts against the piston rod end thread 5-5.

[0078] The working principle of the utility model is as follows:

[0079] The utility model provides a piston rod truncated platform 5-6 at the middle position of the piston rod 5 in the oil cylinder housing 3. The piston rod truncated platform 5-6 and the inner cavity 3-2 of the oil cylinder housing are sealed by a sealing ring and are limited between the oil outlets of the male joint 9 and the female joint 10. If hydraulic oil is injected into the male joint 9, the hydraulic oil pushes the piston rod truncated platform 5-6 to move right, and then drives the gate assembly 7 connected to the piston rod 5 to move right. If hydraulic oil is extracted from the male joint 9 and hydraulic oil is injected into the female joint 10 at the same time, the hydraulic oil pushes the piston rod truncated platform 5-6 to move left, and then drives the gate assembly 7 connected to the piston rod 5 to move left, thereby realizing hydraulically driven control of the gate. When manual drive is required, rotate and unscrew the manual locking short section 1, reverse the direction, the short section protrusion 1-3 is outward, the short section threaded hole 1-1 is inwardly threaded and connected to the manual locking shaft 2, insert the rivet, pin or crowbar into the short section locking hole 1-2, screw the manual locking short section 1 inward, the manual locking short section 1 will push the piston rod 5 through the manual locking rod 4 and then push the gate assembly 7, so that the closing or opening action of the gate can be realized manually.

[0080] The embodiments described above are only descriptions of the preferred methods of the present invention, and are not intended to limit the scope of the present invention. Without departing from the design spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by ordinary technicians in this field should fall within the protection scope determined by the claims of the present invention.

Claims

1. A side door assembly of a gate blowout preventer, characterized in that: It comprises a manual locking nipple (1), a manual locking shaft (2) and a cylinder housing (3), wherein a piston rod (5) which is movable and in sealing contact is arranged in the cavity of the cylinder housing (3); A gate assembly (7) is provided at one end of the oil cylinder housing (3), and the gate assembly (7) is connected to the piston rod (5); the manual locking shaft (2) is provided at the other end of the oil cylinder housing (3); a plurality of slidable manual locking rods (4) are inserted into the manual locking shaft (2) along the circumferential direction; one end of the manual locking rod (4) is clamped with the piston rod (5), and the other end extends along the axial direction of the manual locking shaft (2); The manual locking nipple (1) is threadedly matched with the manual locking shaft (2). When the blowout preventer is in a manual state, the manual locking nipple (1) abuts against each of the manual locking rods (4).

2. The side door assembly of the gate blowout preventer according to claim 1 is characterized in that: The manual locking pup joint (1) comprises a pup joint sleeve (1-6), a pup joint threaded hole (1-1) is arranged on the inner side of one end of the pup joint sleeve (1-6), and the pup joint threaded hole (1-1) is threadedly connected to the manual locking shaft (2); A short section protrusion (1-3) is provided on the outer wall of the short section sleeve (1-6) away from the short section threaded hole (1-1), and when the blowout preventer is in a hydraulic state, the short section protrusion (1-3) abuts against the oil cylinder housing (3); A short section sealing ring groove (1-4) is provided on the short section sleeve (1-6) at a side of the short section protrusion (1-3) away from the short section threaded hole (1-1), and a sealing ring that seals with the oil cylinder housing (3) is provided on the short section sealing ring groove (1-4); A gasket (1-5) is provided on the inner wall of the port of the short section sleeve (1-6) adjacent to the short section threaded hole (1-1); when the blowout preventer is in a manual state, the gasket (1-5) abuts against each of the manual locking rods (4); A plurality of short-section locking holes (1-2) are arranged on the cylinder walls at both ends of the short-section sleeve (1-6).

3. The side door assembly of the gate blowout preventer according to claim 2 is characterized in that: The manual locking shaft (2) comprises a shaft body (2-10), one end of the shaft body (2-10) is provided with a locking shaft locking hole (2-5), the other end of the shaft body (2-10) is provided with a boss (2-8) on the outer wall, and the boss (2-8) is provided with a thread that matches the oil cylinder housing (3); A plurality of manual locking rod through holes (2-1) are arranged in an annular manner at equal intervals inside the boss (2-8), and the manual locking rod through holes (2-1) are plug-fitted with the manual locking rod (4); A manual locking rod through groove (2-9) is provided on the outer wall of the shaft body (2-10) at a position corresponding to the manual locking rod through hole (2-1) along the axial direction, the manual locking rod through groove (2-9) is communicated with the manual locking rod through hole (2-1), and the manual locking rod through groove (2-9) is embedded and matched with the manual locking rod (4); A locking rod sealing ring groove (2-2) is arranged in the manual locking rod through hole (2-1), and a sealing ring cooperating with the manual locking rod (4) is arranged in the locking rod sealing ring groove (2-2); The shaft body (2-10) is provided with an outer wall thread (2-6) on an end away from the boss (2-8) and threadably matched with the short section threaded hole (1-1); A second manual locking shaft sealing ring groove (2-4) is provided on one end of the boss (2-8) close to the locking shaft locking hole (2-5), and a sealing ring that seals with the oil cylinder housing (3) is provided on the second manual locking shaft sealing ring groove (2-4); An inner cavity (2-7) is arranged in the manual locking shaft (2), two manual locking shaft sealing ring grooves (2-3) are arranged on the inner cavity (2-7), and a sealing ring cooperating with the piston rod (5) is arranged on the manual locking shaft sealing ring groove (2-3).

4. The side door assembly of the gate blowout preventer according to claim 3 is characterized in that: The inner ring of the gasket (1-5) is provided with a gasket protrusion (1-7) that matches the manual locking rod through groove (2-9).

5. The side door assembly of the gate blowout preventer according to claim 3 is characterized in that: The manual locking rod (4) comprises a manual locking rod body (4-1), one end of the manual locking rod (4) is provided with a manual locking rod fixed end (4-2), and the manual locking rod fixed end (4-2) is provided as a protruding structure with a groove; The fixed end (4-2) of the manual locking rod is engaged with the piston rod (5).

6. The side door assembly of the gate blowout preventer according to claim 5 is characterized in that: A piston rod truncated cone (5-6) is arranged in the middle of the piston rod (5), a piston rod sealing ring groove (5-4) is arranged on the piston rod truncated cone (5-6), and a sealing ring matching the inner wall of the oil cylinder housing (3) is arranged on the piston rod sealing ring groove (5-4); A piston rod protrusion (5-1) is provided on the piston rod (5) on the side of the piston rod cone (5-6) facing the manual locking shaft (2), a piston rod locking groove (5-2) is formed between the piston rod protrusion (5-1) and the piston rod cone (5-6), and the piston rod protrusion (5-1), the piston rod locking groove (5-2) and the manual locking rod fixed end (4-2) are engaged with each other; A central through hole (5-3) is arranged on the central axis of the piston rod (5).

7. The side door assembly of the gate blowout preventer according to claim 6 is characterized in that: The oil cylinder housing (3) is provided with an oil cylinder housing inner cavity (3-2) and a gate plate connecting cavity (3-4), and the oil cylinder housing inner cavity (3-2) and the gate plate connecting cavity (3-4) are connected through a piston rod cavity (3-3); The inner cavity (3-2) of the oil cylinder housing is slidably connected to the piston rod round platform (5-6); an inner wall of the inner cavity (3-2) of the oil cylinder housing is provided with an inner thread (3-6) of the oil cylinder housing on one end close to the manual locking shaft (2); and the inner thread (3-6) of the oil cylinder housing is threadably connected to the boss (2-8); Two oil cylinder housing sealing ring grooves (3-1) are arranged in the piston rod cavity (3-3), and sealing rings that are sealed and matched with the piston rod (5) are arranged on the oil cylinder housing sealing ring grooves (3-1); The gate assembly (7) is arranged in the gate connection cavity (3-4), a guide rod hole (3-5) is arranged on the gate connection cavity (3-4), a guide rod (8) is arranged in the guide rod hole (3-5), and the guide rod (8) is in sliding cooperation with the gate assembly (7); A male joint (9) and a female joint (10) are installed on the oil cylinder housing (3), and the piston rod truncated cone (5-6) is limitedly sealed between the oil outlets of the male joint (9) and the female joint (10).

8. The side door assembly of the gate blowout preventer according to claim 1 is characterized in that: The gate assembly (7) is connected to the piston rod (5) via a piston gate connector (6); The piston gate plate connector (6) is configured in the shape of a boss, and the gate plate assembly (7) is provided with a clamping groove (7-2) at one end that cooperates with the piston gate plate connector (6), and the gate plate assembly (7) is clamped in the piston gate plate connector (6) through the clamping groove (7-2); The piston gate plate connector (6) is threadedly connected to the piston rod end thread (5-5) of the piston rod (5), and the piston gate plate connector (6) is provided with a top screw (6-1), the inner end of the top screw (6-1) abuts against the piston rod end thread (5-5).

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