Pluggable valve between side door and shell of ram blowout preventer

Abstract

The utility model discloses a plug valve between a side door and a shell of a ram blowout preventer, which relates to the technical field of petroleum machinery and comprises the shell and the side door on the ram blowout preventer, valve cavities are arranged in the shell and the side door, a concave joint is connected in the shell, a first valve core is arranged in the concave joint, and a second valve core is arranged in the first valve core. A spiral compression spring I is arranged on the valve core I; a convex connector is arranged in the side door, a second valve element is arranged in the convex connector, a second spiral compression spring is arranged on the second valve element, and the convex connector is matched with the concave connector in an inserted mode. The plug valve is arranged at the joint of the ram blowout preventer shell and the side door oil way, when the side door is closed, the oil way for controlling the ram to be opened and closed is connected and sealed, when the side door is opened, the oil way for controlling the ram to be opened and closed is disconnected and sealed, and the oil way can keep hydraulic oil pressure in the operation. The plug valve is compact in structure, safe, reliable and low in cost, and has wide market application prospects.

Description

Technical Field

[0001] The utility model relates to the technical field of petroleum machinery, in particular to a plug-in valve between a side door and a shell of a gate blowout preventer. Background Art

[0002] The gate blowout preventer is an important blowout prevention device in the process of drilling and well repair. Usually when the side door is opened or closed, the oil circuit that controls the opening and closing of the gate needs to remain unobstructed. Due to the different connection methods between the side door and the shell, the structure to ensure the unobstructed control of the oil circuit is also different, but it is usually more complicated. If the side door leaves the shell, and there is no other physical structure between the side door and the shell to ensure the continuity of the oil circuit, the oil circuit will be disconnected and the liquid oil pressure cannot be maintained. Utility Model Content

[0003] The utility model aims to provide a plug-in valve between the side door and the shell of a gate blowout preventer, so as to solve the problem mentioned in the background technology that the oil circuit between the side door and the shell of the gate blowout preventer is complicated, the oil circuit will be disconnected when the side door is opened, and the oil pressure cannot be maintained.

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

[0005] The utility model discloses a plug-in valve between a side door and a shell of a gate blowout preventer, comprising a shell and a side door on the gate blowout preventer, and characterized in that a valve cavity is provided at an outer port of a control oil circuit in the shell, a concave joint mounting internal thread is provided between the valve cavity and the control oil circuit, the concave joint mounting internal thread corresponds to the central axis of the valve cavity, the concave joint mounting internal thread is sealed and connected with a concave joint, a valve core is provided in the cavity of the concave joint, and the valve core is sealed and restricted in the cavity of the concave joint by an elastic retaining ring, a spring baffle and a spiral compression spring through a hole.

[0006] The hole is fixed to the concave joint groove on the concave joint with an elastic retaining ring, the spring baffle is fixed to the concave joint inner cylindrical surface three on the concave joint, the concave joint groove is arranged on the concave joint inner cylindrical surface three, the helical compression spring is set on the valve core cylindrical surface one of the valve core one, one end of the helical compression spring is against the spring baffle, and the other end is against the valve core flange of the valve core one.

[0007] The outer port of the second control oil circuit in the side door is provided with a convex joint mounting internal thread, the convex joint mounting internal thread corresponds to the central axis of the valve cavity, the convex joint mounting internal thread is sealed and connected with a convex joint, a valve core 2 is provided in the convex joint cavity, and the valve core 2 is sealed and restricted in the cavity of the convex joint by a second elastic retaining ring, a second spring baffle and two spiral compression springs through a hole.

[0008] The hole is fixed to the convex joint groove on the convex joint with an elastic retaining ring 2, the spring baffle 2 is fixed to the convex joint inner cylindrical surface 2 on the convex joint, the convex joint groove is arranged on the convex joint inner cylindrical surface 2, the helical compression spring 2 is sleeved on the valve core cylindrical surface 1 of the valve core 2, one end of the helical compression spring 2 is against the spring baffle 2, and the other end is against the valve core flange of the valve core 2.

[0009] The male connector and the female connector are plug-in and sealed.

[0010] Furthermore, a concave joint sealing circular table surface whose diameter gradually decreases toward the concave joint installation internal thread connection position between the valve cavity and the concave joint installation internal thread is provided.

[0011] The female joint is provided with a female joint O-ring outer groove, and a sealing ring matched with the female joint sealing circular table surface is provided in the female joint O-ring outer groove.

[0012] Furthermore, the outer wall of the female joint located in the valve cavity is arranged near the side door portion as a female joint outer hexagonal pedestal, and one end of the female joint outer hexagonal pedestal close to the control oil circuit is connected to the female joint cylindrical boss, and the female joint cylindrical boss is against the outer port of the female joint sealing circular table surface, and the female joint cylindrical boss is connected to the female joint outer thread through the outer groove of the female joint O-ring, and the female joint outer thread is threadably matched with the female joint mounting inner thread.

[0013] The inner wall of the female joint is provided with a female joint inner cylindrical surface 1 near the side door portion, and two female joint O-ring inner grooves are provided in the female joint inner cylindrical surface 1, and a sealing ring cooperating with the male joint is provided in the female joint O-ring inner groove.

[0014] The inner wall of the concave joint is provided with a concave joint sealing inner circular table surface with a gradually increasing diameter at the end of the inner cylindrical surface 1 of the concave joint away from the side door, and the concave joint sealing inner circular table surface cooperates with the head of the valve core 1 for blocking.

[0015] The end of the concave joint sealing inner cylindrical surface away from the side door is provided with a concave joint inner cylindrical surface 2, and the end of the concave joint inner cylindrical surface 2 away from the side door is connected to the concave joint inner cylindrical surface 3.

[0016] Furthermore, a valve core cylindrical surface 1 is arranged on the outer wall of one end of the valve core 1, and a valve core circular table surface with a gradually increasing diameter starting from the end is arranged on the outer wall of the other end of the valve core 1, and the valve core circular table surface is sealed and cooperated with the inner circular table surface of the concave joint seal.

[0017] A valve core cylindrical surface 2 is arranged at one end of the valve core cylindrical surface adjacent to the valve core cylindrical surface 1, and two separated valve core sealing circular table surfaces are arranged on the valve core cylindrical surface 2. A valve core O-ring groove is formed between the two valve core sealing circular table surfaces, and an O-ring is arranged in the valve core O-ring groove to cooperate with the inner circular table surface of the concave joint seal.

[0018] The valve core sealing frustum surface and the valve core cylindrical surface 1 are connected by the valve core flange, and the diameter of the valve core cylindrical surface 1 is smaller than the diameter of the valve core flange.

[0019] Furthermore, one end of the male joint mounting internal thread close to the shell is configured as a male joint sealing circular table surface with a gradually increasing diameter.

[0020] The male joint is provided with an outer groove of a male joint O-ring, and a sealing ring matched with the sealing circular table surface of the male joint is provided in the outer groove of the male joint O-ring.

[0021] Furthermore, an outer cylindrical surface of a male joint is arranged on the outer wall of one end of the male joint close to the shell, and the outer cylindrical surface of the male joint is plugged into and matched with the inner cylindrical surface of the female joint; the end of the outer cylindrical surface of the male joint close to the side door is connected to an outer hexagonal pedestal of the male joint, and the outer hexagonal pedestal of the male joint is resting on the outer port of the sealing circular table surface of the male joint, and the end of the outer hexagonal pedestal of the male joint close to the side door is connected to an outer groove of the male joint O-ring, and an outer thread of the male joint is arranged on the outer groove of the male joint O-ring close to the end of the side door, and the outer thread of the male joint is threadedly connected to the inner thread of the male joint installation.

[0022] A convex joint sealing inner cylindrical surface with a gradually increasing diameter is arranged on the inner wall of one end of the convex joint close to the shell, a convex joint sealing inner cylindrical surface one is arranged on the side close to the side door, and a side of the convex joint inner cylindrical surface one close to the side door is connected to the convex joint inner cylindrical surface two.

[0023] Furthermore, the valve core 2 has the same shape, structure and function as the valve core 1.

[0024] Furthermore, the spring baffle plate 1 is provided with four oil-passing circular holes and a valve core mounting hole, and the valve core mounting hole is inserted and matched with the valve core 1 and the valve core 2.

[0025] The spring baffle plate 2 has the same shape, structure and function as the spring baffle plate 1.

[0026] The second elastic retaining ring for the hole has the same shape, structure and function as the first elastic retaining ring for the hole.

[0027] Compared with the prior art, the beneficial technical effects of the utility model are:

[0028] The utility model provides a plug-in valve at the connection between the gate blowout preventer housing and the side door oil circuit. When the side door is closed, the oil circuit that controls the gate to open and close is connected and sealed. When the side door is opened, the oil circuit that controls the gate to open and close is disconnected and sealed. During this operation, the oil circuit can maintain the oil pressure. The plug-in valve has a compact structure, is safe and reliable, has low cost, and has a wide market application prospect. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] The utility model will be further described below in conjunction with the accompanying drawings.

[0030] Figure 1 This is a diagram showing the location of the plug-in valve between the side door and the shell of the gate blowout preventer of the utility model;

[0031] Figure 2 It is a schematic diagram of the plug-in valve structure;

[0032] Figure 3 This is a schematic diagram of the gate blowout preventer housing, side door oil circuit and valve chamber structure;

[0033] Figure 4 This is a schematic diagram of the structure of a plug-in valve female connector;

[0034] Figure 5 It is a schematic diagram of the valve core structure;

[0035] Figure 6 It is a schematic diagram of the convex joint structure;

[0036] Figure 7 It is a schematic diagram of the structure of the elastic retaining ring for the hole;

[0037] Figure 8 Schematic diagram of the spring baffle structure;

[0038] Fig. 9 This is a cross-sectional view of the spring baffle.

[0039] Explanation of the reference numerals: 1. Shell; 101. Valve cavity; 102. Concave joint sealing circular table surface; 103. Concave joint mounting internal thread; 104. Control oil circuit 1; 2. Side door; 201. Concave joint sealing circular table surface; 202. Concave joint mounting internal thread; 203. Control oil circuit 2; 3. Concave joint; 301. Concave joint external thread; 302. Concave joint O-ring outer groove; 303. Concave joint cylindrical boss; 304. Concave joint outer hexagonal pedestal; 305. Concave joint inner cylindrical surface 1; 306. Concave joint sealing inner circular table surface; 307. Concave joint inner cylindrical surface 2; 308. Concave joint inner cylindrical surface 3; 309. Concave joint groove; 310. Concave joint O-ring inner groove; 4. Spring baffle 1; 401. Valve core mounting hole ;402, oil hole;5, spiral compression spring one;501, spiral compression spring two;6, valve core one;601, valve core sealing circular table surface;602, valve core O-ring groove;603, valve core cylindrical surface one;604, valve core flange;605, valve core circular table surface;606, valve core cylindrical surface two;7, convex joint;701, convex joint external thread;702, convex joint O-ring external groove;703, convex joint external hexagonal pedestal;704, convex joint external cylindrical surface;705, convex joint sealing inner circular table surface;706, convex joint inner cylindrical surface one;707, convex joint inner cylindrical surface two;708, convex joint groove;8, hole elastic retaining ring one;801, hole elastic retaining ring two;9, spring baffle two;10, valve core two. DETAILED DESCRIPTION

[0040] 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.

[0041] like Figures 1 to 3 As shown, the present embodiment discloses a plug-in valve between a side door and a housing of a gate blowout preventer, comprising a housing 1 and a side door 2 on the gate blowout preventer, a valve cavity 101 is provided at an outer port of a control oil circuit 104 in the housing 1, a female joint mounting internal thread 103 is provided between the valve cavity 101 and the control oil circuit 104, the female joint mounting internal thread 103 corresponds to the central axis of the valve cavity 101, the female joint mounting internal thread 103 is sealed and connected with a female joint 3, a valve core 6 is provided in the cavity of the female joint 3, and the valve core 6 is sealed and restricted in the cavity of the female joint 3 through a hole with an elastic retaining ring 8, a spring baffle 4 and a spiral compression spring 5.

[0042] like Figure 2 , Figure 4 and Figure 5As shown, the hole is fixed to the female joint groove 309 on the female joint 3 with an elastic retaining ring 8, the spring baffle 4 is fixed to the female joint inner cylindrical surface 308 on the female joint 3, the female joint groove 309 is arranged on the female joint inner cylindrical surface 308, the helical compression spring 5 is sleeved on the valve core 6, one end of the helical compression spring 5 is against the spring baffle 4, and the other end is against the valve core flange 604 of the valve core 6.

[0043] like Figure 2 and Figure 3 As shown, the outer port of the control oil circuit 203 in the side door 2 is provided with a male joint mounting internal thread 202, and the male joint mounting internal thread 202 corresponds to the central axis of the valve cavity 101. The male joint mounting internal thread 202 is sealed and connected with a male joint 7. A valve core 10 is provided in the cavity of the male joint 7. The valve core 10 is sealed and restricted in the cavity of the male joint 7 through a hole using an elastic retaining ring 801, a spring baffle 9 and a spiral compression spring 501.

[0044] like Figure 2 , Figure 5 and Figure 6 As shown, the hole is fixed to the convex joint groove 708 on the convex joint 7 with an elastic retaining ring 801, the spring baffle 9 is fixed to the convex joint inner cylindrical surface 707 on the convex joint 7, the convex joint groove 708 is arranged on the convex joint inner cylindrical surface 707, the helical compression spring 501 is sleeved on the valve core 10, one end of the helical compression spring 501 is against the spring baffle 9, and the other end is against the valve core flange 604 of the valve core 10.

[0045] In this embodiment, the male connector 7 and the female connector 3 are plugged and sealed together.

[0046] like Figure 3 and Figure 4 As shown, a concave joint sealing conical surface 102 whose diameter gradually decreases toward the concave joint mounting internal thread 103 is provided at the connection position between the valve cavity 101 and the concave joint mounting internal thread 103; a concave joint O-ring outer groove 302 is provided on the concave joint 3, and a sealing ring cooperating with the concave joint sealing conical surface 102 is provided in the concave joint O-ring outer groove 302.

[0047] like Figures 2 to 4 As shown, the outer wall of the female joint 3 located in the valve cavity 101 near the side door 2 is set as a female joint outer hexagonal column 304, and one end of the female joint outer hexagonal column 304 near the control oil circuit 104 is connected to the female joint cylindrical boss 303, and the female joint cylindrical boss 303 is against the outer port of the female joint sealing circular table surface 102. The female joint cylindrical boss 303 is connected to the female joint external thread 301 through the female joint O-ring outer groove 302, and the female joint external thread 301 is threadedly matched with the female joint mounting internal thread 103.

[0048] A concave joint inner cylindrical surface 305 is arranged on the inner wall of the concave joint 3 near the side door 2 , two concave joint O-ring inner grooves 310 are arranged in the concave joint inner cylindrical surface 305 , and a sealing ring cooperating with the convex joint 7 is arranged in the concave joint O-ring inner groove 310 .

[0049] The inner wall of the female joint 3 is provided with a female joint sealing inner circular table surface 306 with a gradually increasing diameter at one end of the female joint inner cylindrical surface 305 away from the side door 2, and the female joint sealing inner circular table surface 306 cooperates with the head of the valve core 6 for blocking.

[0050] The end of the concave joint sealing inner circular table surface 306 away from the side door 2 is provided with a concave joint inner cylindrical surface 2 307 , and the end of the concave joint inner cylindrical surface 2 307 away from the side door 2 is connected to the concave joint inner cylindrical surface 308 .

[0051] like Figure 5 As shown, a valve core cylindrical surface 603 is arranged on the outer wall of one end of the valve core 6, and a valve core circular table surface 605 whose diameter gradually increases from the end is arranged on the outer wall of the other end of the valve core 6, and the valve core circular table surface 605 is sealed and matched with the inner circular table surface 306 of the concave joint seal.

[0052] A valve core cylindrical surface 2 606 is arranged at one end of the valve core cylindrical surface 605 adjacent to the valve core cylindrical surface 1 603, and two separated valve core sealing circular table surfaces 601 are arranged on the valve core cylindrical surface 2 606. A valve core O-ring groove 602 is formed between the two valve core sealing circular table surfaces 601, and an O-ring is arranged in the valve core O-ring groove 602 to cooperate with the inner circular table surface 306 of the concave joint seal.

[0053] The valve core sealing frustum surface 601 and the valve core cylindrical surface 1 603 are connected by a valve core flange 604 , and the diameter of the valve core cylindrical surface 1 603 is smaller than the diameter of the valve core flange 604 .

[0054] like Figure 3 and Figure 6 As shown, one end of the male joint mounting internal thread 202 close to the housing 1 is provided with a male joint sealing circular table surface 201 with a gradually increasing diameter.

[0055] The male joint 7 is provided with a male joint O-ring outer groove 702 , in which a sealing ring matching with the male joint sealing circular table surface 201 is provided.

[0056] like Figure 2 , Figure 3 and Figure 6As shown, in this embodiment, a male joint outer cylindrical surface 704 is provided on the outer wall of one end of the male joint 7 close to the shell body 1, and the male joint outer cylindrical surface 704 is plugged into and matched with the female joint inner cylindrical surface 305, and the end of the male joint outer cylindrical surface 704 close to the side door 2 is connected to the male joint outer hexagonal pedestal 703, and the male joint outer hexagonal pedestal 703 is against the outer port of the male joint sealing circular table surface 201, and the end of the male joint outer hexagonal pedestal 703 close to the side door 2 is connected to the male joint O-ring outer groove 702, and the end of the male joint O-ring outer groove 702 close to the side door 2 is provided with a male joint outer thread 701, and the male joint outer thread 701 is threadedly connected with the male joint mounting inner thread 202.

[0057] A convex joint sealing inner circular table surface 705 with a gradually increasing diameter is arranged on the inner wall of one end of the convex joint 7 close to the shell body 1, a convex joint sealing inner circular table surface 705 is arranged on the side close to the side door 2, and a convex joint inner cylindrical surface 1 706 is connected to a convex joint inner cylindrical surface 2 707 on the side close to the side door 2.

[0058] like Figure 1 As shown, a valve core cylindrical surface 1 is arranged on the outer wall of one end of the valve core 2 10, and a valve core frustum surface whose diameter gradually increases from the end is arranged on the outer wall of the other end. A valve core cylindrical surface 2 is arranged on the end of the valve core frustum surface adjacent to the valve core cylindrical surface 1, and two separated valve core sealing frustum surfaces are arranged on the valve core cylindrical surface 2. A valve core O-ring groove is formed between the two valve core sealing frustum surfaces. The valve core sealing frustum surface and the valve core cylindrical surface 1 are connected by a valve core flange, and the diameter of the valve core cylindrical surface 1 is smaller than the diameter of the valve core flange.

[0059] In this embodiment, the valve core 2 10 has the same shape, structure and function as the valve core 1 6 , and its structure will not be described in detail.

[0060] like Figure 8 and Fig. 9 As shown, the spring baffle plate 1 4 is provided with four oil-passing circular holes 402 and a valve core mounting hole 401, and the valve core mounting hole 401 is inserted and matched with the valve core 1 6 and the valve core 2 10; the spring baffle plate 2 9 has the same shape, structure and function as the spring baffle plate 1 4.

[0061] like Figure 7 As shown, the second elastic retaining ring 801 for the hole has the same shape, structure and function as the elastic retaining ring 8 for the hole.

[0062] like Figure 1-Figure 6 As shown, the working principle of the utility model is as follows:

[0063] The oil circuit plug-in valve between the side door and the shell of the gate blowout preventer of the utility model has a convex joint 7 inserted into the concave joint 3 in the initial state, the valve core 1 6 conflicts with the valve core 2 10, the helical compression spring 1 5 and the helical compression spring 2 501 are compressed, and a gap is left between the valve core circular table surface 605 of the valve core 1 6 and the inner circular table surface 306 of the concave joint sealing, and between the valve core circular table surface 605 of the valve core 2 10 and the inner circular table surface 705 of the convex joint sealing, so that the oil circuit is unblocked and is sealed by the concave joint 3 and the convex joint 7.

[0064] When the side door 2 is removed from the housing 1, the male connector 3 is removed from the female connector 3 together with the side door 2. During the removal process, the helical compression spring 1 5 and the helical compression spring 2 501 extend and push the valve core 1 6 and the valve core 2 10 in the female connector 3 and the male connector 7 to move forward. Before the two O-rings on the inner groove 310 of the female connector O-ring are separated, the valve core round table 605 of the valve core 1 6 and the valve core 2 10 blocks the inner round table 306 of the female connector and the inner round table 705 of the male connector to achieve oil circuit sealing. Since then, the female connector 3 and the valve core 1 6, and the male connector 7 and the valve core 2 10 are sealed under the action of the spring and the pipeline oil pressure, respectively, and the side door 2 and the male connector 7 can be completely removed.

[0065] When the side door 2 is closed, the side door 2 is inserted into the housing 1, and the male joint 7 is inserted into the female joint 3. Before the seals of the valve core 1 6 and the female joint 3, and the valve core 2 10 and the male joint 7 fail, one of the two O-rings on the inner groove 310 of the female joint O-ring has been sealed, and the male joint 7 and the side door 2 continue to be inserted. After the end faces of the two valve core circular table surfaces 605 come into contact, the helical compression spring 1 5 and the helical compression spring 2 501 are compressed, and the valve core circular table surface 605 of the valve core 1 6 and the inner circular table surface 306 of the female joint seal, and the valve core circular table surface 605 of the valve core 2 10 and the inner circular table surface 705 of the male joint seal will separate to leave a gap, so that the oil circuit is connected, and the two O-rings on the inner groove 310 of the female joint O-ring are completely sealed, that is, the male joint 7 and the female joint 3 are sealed.

[0066] 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 plug-in valve between a side door and a housing of a gate blowout preventer, comprising a housing (1) and a side door (2) on the gate blowout preventer, characterized in that: A valve cavity (101) is provided at the outer port of the control oil circuit 1 (104) in the housing (1), and a female joint mounting internal thread (103) is provided between the valve cavity (101) and the control oil circuit 1 (104), the female joint mounting internal thread (103) corresponds to the central axis of the valve cavity (101), the female joint mounting internal thread (103) is internally threadedly connected to a female joint (3), a valve core 1 (6) is provided in the cavity of the female joint (3), and the valve core 1 (6) is sealed and restricted in the cavity of the female joint (3) through a hole using an elastic retaining ring 1 (8), a spring baffle 1 (4) and a helical compression spring 1 (5); The hole is fixed to the concave joint groove (309) on the concave joint (3) by an elastic retaining ring (8); the spring baffle (4) is fixed to the concave joint inner cylindrical surface (308) of the concave joint (3); the concave joint groove (309) is arranged on the concave joint inner cylindrical surface (308); the helical compression spring (5) is sleeved on the valve core (6); one end of the helical compression spring (5) is against the spring baffle (4) and the other end is against the valve core flange (604) of the valve core (6); The outer port of the second control oil circuit (203) in the side door (2) is provided with a male joint mounting internal thread (202), the male joint mounting internal thread (202) corresponds to the central axis of the valve cavity (101), the male joint mounting internal thread (202) is internally threadedly connected with a male joint (7), a valve core (10) is provided in the cavity of the male joint (7), and the valve core (10) is sealed and restricted in the cavity of the male joint (7) through a hole using a second elastic retaining ring (801), a second spring baffle (9) and a second helical compression spring (501); The hole is fixed to the convex joint groove (708) on the convex joint (7) by a second elastic retaining ring (801); the second spring baffle plate (9) is fixed to the second inner cylindrical surface (707) of the convex joint on the convex joint (7); the convex joint groove (708) is arranged on the second inner cylindrical surface (707) of the convex joint; the second helical compression spring (501) is sleeved on the second valve core (10); one end of the second helical compression spring (501) is against the second spring baffle plate (9), and the other end is against the valve core flange (604) of the second valve core (10); The male connector (7) and the female connector (3) are plug-connected and sealed.

2. The plug-in valve between the side door and the housing of the gate blowout preventer according to claim 1, characterized in that: A concave joint sealing circular table surface (102) whose diameter gradually decreases toward the concave joint mounting internal thread (103) is provided at the connection position between the valve cavity (101) and the concave joint mounting internal thread (103); The female joint (3) is provided with a female joint O-ring outer groove (302), and a sealing ring matched with the female joint sealing circular table surface (102) is provided in the female joint O-ring outer groove (302).

3. The plug-in valve between the side door and the housing of the gate blowout preventer according to claim 2, characterized in that: The outer wall of the female joint (3) located in the valve cavity (101) and close to the side door (2) is configured as a female joint outer hexagonal column base (304), and one end of the female joint outer hexagonal column base (304) close to the control oil circuit (104) is connected to the female joint cylindrical boss (303), and the female joint cylindrical boss (303) is connected to the female joint outer thread (301) through the outer groove (302) of the female joint O-ring, and the female joint outer thread (301) is threadedly matched with the female joint mounting inner thread (103); A concave joint inner cylindrical surface 1 (305) is provided on the inner wall of the concave joint (3) near the side door (2), two concave joint O-ring inner grooves (310) are provided in the concave joint inner cylindrical surface 1 (305), and a sealing ring cooperating with the convex joint (7) is provided in the concave joint O-ring inner grooves (310); The inner wall of the concave joint (3) is provided with a concave joint sealing inner circular table surface (306) with a gradually increasing diameter at the end of the concave joint inner cylindrical surface 1 (305) away from the side door (2), and the concave joint sealing inner circular table surface (306) is matched with the head of the valve core 1 (6) for blocking; A second concave joint inner cylindrical surface (307) is arranged at one end of the concave joint sealing inner circumferential table surface (306) away from the side door (2), and an end of the second concave joint inner cylindrical surface (307) away from the side door (2) is connected to the third concave joint inner cylindrical surface (308).

4. The plug-in valve between the side door and the housing of the gate blowout preventer according to claim 3 is characterized by: The outer wall of one end of the valve core (6) is provided with a valve core cylindrical surface (603), and the outer wall of the other end of the valve core (6) is provided with a valve core circular table surface (605) whose diameter gradually increases from the end, and the valve core circular table surface (605) is sealed and matched with the inner circular table surface (306) of the concave joint seal; A second valve core cylindrical surface (606) is arranged at one end of the valve core cylindrical surface (605) adjacent to the first valve core cylindrical surface (603), two separated valve core sealing circular surfaces (601) are arranged on the second valve core cylindrical surface (606), a valve core O-ring groove (602) is formed between the two valve core sealing circular surfaces (601), and an O-ring matching with the inner circular surface (306) of the concave joint sealing is arranged in the valve core O-ring groove (602); The valve core sealing frustum surface (601) and the valve core cylindrical surface 1 (603) are connected by the valve core flange (604), and the diameter of the valve core cylindrical surface 1 (603) is smaller than the diameter of the valve core flange (604).

5. The plug-in valve between the side door and the housing of the gate blowout preventer according to claim 4, characterized in that: One end of the male joint mounting internal thread (202) close to the housing (1) is provided with a male joint sealing circular table surface (201) with a gradually increasing diameter; The male joint (7) is provided with a male joint O-ring outer groove (702), and a sealing ring matched with the male joint sealing circular table surface (201) is provided in the male joint O-ring outer groove (702).

6. The plug-in valve between the side door and the housing of the gate blowout preventer according to claim 5, characterized in that: The male joint (7) is provided with an outer cylindrical surface (704) of a male joint on the outer wall of one end close to the shell (1), and the male joint outer cylindrical surface (704) is plugged into and matched with the inner cylindrical surface (305) of the female joint. The end of the male joint outer cylindrical surface (704) close to the side door (2) is connected to the male joint outer hexagonal pedestal (703), and the end of the male joint outer hexagonal pedestal (703) close to the side door (2) is connected to the male joint O-ring outer groove (702), and the end of the male joint O-ring outer groove (702) close to the side door (2) is provided with a male joint outer thread (701), and the male joint outer thread (701) is threadedly connected with the male joint mounting inner thread (202); A convex joint sealing inner circular table surface (705) with a gradually increasing diameter is provided on the inner wall of one end of the convex joint (7) close to the shell (1); a convex joint inner cylindrical surface 1 (706) is provided on the side of the convex joint sealing inner circular table surface (705) close to the side door (2); and the side of the convex joint inner cylindrical surface 1 (706) close to the side door (2) is connected to the convex joint inner cylindrical surface 2 (707).

7. The plug-in valve between the side door and the housing of the gate blowout preventer according to claim 6, characterized in that: The valve core 2 (10) has the same shape and structure as the valve core 1 (6).

8. The plug-in valve between the side door and the housing of the gate blowout preventer according to claim 1, characterized in that: The spring baffle plate 1 (4) is provided with four oil-passing circular holes (402) and a valve core mounting hole (401), and the valve core mounting hole (401) is inserted and matched with the valve core 1 (6) and the valve core 2 (10); The spring baffle plate 2 (9) has the same shape and structure as the spring baffle plate 1 (4); The second elastic retaining ring for hole (801) has the same shape and structure as the first elastic retaining ring for hole (8).

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