CN220749046U - Closed sealing mechanism for pipeline and throttle valve for christmas tree - Google Patents

Abstract

The utility model relates to the technical field of throttle valves, in particular to a closing and sealing mechanism for a pipeline and a throttle valve for a christmas tree of the closing and sealing mechanism. The closed sealing mechanism for the pipeline comprises a piston hydraulic cylinder, a servo control assembly, and a valve position feedback assembly, wherein the piston hydraulic cylinder comprises a cylinder body, sealing assemblies arranged on the outer end surfaces of two sides of the cylinder body, a moving assembly arranged on the inner side of the middle part of the cylinder body, a fixing frame arranged at the bottom of the lower end of the cylinder body, and the servo control assembly is arranged on the outer end of the side surface of the piston hydraulic cylinder; in the in-service use, seal assembly's use can seal the both sides face of cylinder body, avoids appearing leaking the condition at night, simultaneously through servo control assembly's use, can control the hydraulic oil flow and the position of interpolation to this is accomplished the lift to the piston board, finally because valve position feedback assembly's use, makes things convenient for operating personnel to observe the valve position, can in time adjust.

Description

Closed sealing mechanism for pipeline and throttle valve for christmas tree

Technical Field

The utility model relates to the technical field of throttle valves for christmas trees, in particular to a closed sealing mechanism for a pipeline and a throttle valve for the christmas tree.

Background

The throttle valve for the christmas tree is a valve for controlling the flow rate of fluid by changing the throttle section or the throttle length, and a large number of throttle valves for the christmas tree are used in industrial pipelines in petroleum and chemical industries. With the development of science and technology and the improvement of the automatic control degree in the production process, the throttle caliber control of the throttle valve for the christmas tree, especially the throttle caliber of the valve to be regulated, is mostly driven by electric, pneumatic or hydraulic.

The throttle valve for the existing christmas tree is used for a long time, abrasion can occur in the throttle valve, so that after the throttle valve for the christmas tree is closed, water leakage or air leakage and the like can occur, raw materials are leaked, and secondly, the tightness of the inside of the device is required to be ensured by hydraulic driving, so that the condition of leaking night is prevented.

Disclosure of Invention

This section is intended to outline some aspects of embodiments of the utility model and to briefly introduce some preferred embodiments. Some simplifications or omissions may be made in this section as well as in the description summary and in the title of the application, to avoid obscuring the purpose of this section, the description summary and the title of the utility model, which should not be used to limit the scope of the utility model.

The present utility model has been made in view of the above or the problem of poor sealing property of the hydraulic drive in the prior art.

It is therefore an object of the present utility model to provide a closure seal mechanism for a pipe.

In order to solve the technical problems, the utility model provides the following technical scheme: the closed sealing mechanism for the pipeline comprises a piston hydraulic cylinder, a sealing component, a moving component and a fixing frame, wherein the sealing component is arranged on the outer end surfaces of two sides of the cylinder;

the valve position feedback assembly is arranged on the upper end face of the piston hydraulic cylinder.

As a preferred embodiment of the closing seal mechanism for a pipe of the present utility model, wherein: the sealing assembly comprises a sealing cover plate, sealing strips arranged on two sides of the sealing cover plate, and sealing bolts arranged between the cylinder body and the sealing strips;

the sealing bolt penetrates through the cylinder body and the sealing strip respectively, and the top end of the sealing bolt is inserted into the cylinder body.

As a preferred embodiment of the closing seal mechanism for a pipe of the present utility model, wherein: the motion assembly comprises a flow cavity arranged between the cylinder body and the sealing assembly, a cavity arranged in the cylinder body, a piston plate movably arranged in the middle of the cavity, and a piston rod arranged at the bottom of the lower end of the piston plate;

the piston plate and the piston rod are connected with each other by adopting a fixed screw.

As a preferred embodiment of the closing seal mechanism for a pipe of the present utility model, wherein: the servo control assembly comprises a shell, a double-shaft motor arranged in the left end of the shell, a shaft lever arranged outside the double-shaft motor, a blocking part arranged at the outer end of the shaft lever, and a guide frame arranged at the outer end face of the blocking part;

the servo control assembly further comprises a liquid inlet pipe arranged on the right side surface of the shell, two groups of liquid outlet pipes arranged on the top end of the other side of the liquid inlet pipe, a baffle plate arranged in the middle of the shell, and a first connecting pipe and a second connecting pipe which are respectively arranged on the tops of two ends of the shell;

the baffle divides the inside of the shell into two parts, the outer sides of the first connecting pipe and the second connecting pipe are connected with the flow cavity, and the shaft rod is connected with the inner wall of the blocking part through threads at the top end.

As a preferred embodiment of the closing seal mechanism for a pipe of the present utility model, wherein: the blocking component comprises a sleeve, a stop block arranged at the top of the outer end of the sleeve and limit strips arranged on the surfaces of two sides of the sleeve;

the stop block is of a round table-shaped structure, the inclined planes of the stop block and the liquid outlet pipe are the same in angle, and the limiting strips are mutually clamped and connected with the inner wall of the guide frame.

As a preferred embodiment of the closing seal mechanism for a pipe of the present utility model, wherein: the valve position feedback assembly comprises an observation window, scale marks arranged on the surface of the observation window, a scale arranged in the observation window and a supporting rod arranged at the bottom of the lower side of the scale;

the bottom of the lower end of the supporting rod is connected with the moving assembly through a fixing screw.

The closed sealing mechanism for the pipeline has the beneficial effects that: in the in-service use, seal assembly's use can seal the both sides face of cylinder body, avoids appearing leaking the condition at night, simultaneously through servo control assembly's use, can control the hydraulic oil flow and the position of interpolation to this is accomplished the lift to the piston board, finally because valve position feedback assembly's use, makes things convenient for operating personnel to observe the valve position, can in time adjust.

In view of the problem that in the actual use process, the throttle valve for the christmas tree is worn and then leaks.

It is therefore another object of the present utility model to provide a throttle valve for a tree.

In order to solve the technical problems, the utility model also provides the following technical scheme: the throttle valve for the Christmas tree comprises a closing sealing mechanism for a pipeline, a connecting mechanism arranged at the lower side end of the piston hydraulic cylinder, and a valve body arranged at the lower end surface of the connecting mechanism;

the valve body comprises a frame body, a flow pipe inlet arranged at the bottom of the lower end of the frame body, and a flow pipe outlet arranged outside the side surface of the frame body;

the valve body also comprises a guide plate arranged at the upper end of the inlet of the flow pipe and a valve plug assembly arranged at the upper part of the guide plate.

As a preferred embodiment of the throttle valve for a christmas tree of the present utility model, wherein: the valve plug assembly comprises a sealing plug and a clamping plate arranged on the lower end surface of the sealing plug;

the upper side of the guide plate is of an arc-shaped structure, and the radian of the upper end face of the guide plate is the same as that of the lower end face of the clamping plate.

As a preferred embodiment of the throttle valve for a christmas tree of the present utility model, wherein: the connecting mechanism comprises a connecting frame, a leakage-proof strip arranged on the lower side of the connecting frame and a mounting rod arranged in the middle of the connecting frame;

the top of the upper end of the mounting rod is connected with the piston rod, and the leak-proof strip is assembled on the connecting surface of the connecting frame and the frame body.

As a preferred embodiment of the throttle valve for a christmas tree of the present utility model, wherein: the connecting mechanism further comprises a mounting block arranged at the bottom of the lower end of the mounting rod;

wherein the mounting block is located inside the sealing plug.

The throttle valve for the Christmas tree has the beneficial effects that: after the sealing device is closed, the clamping plate drives the sealing plug to rotate along the guiding plate, so that the sealing plug and the inlet of the flowing pipe can be completely closed, even if the sealing plug is used for a long time, the middle part of the sealing plug is worn, and the guiding plate and the clamping plate at the outer end also play a secondary sealing role, so that the leakage is avoided.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present utility model, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art. Wherein:

fig. 1 is an overall schematic of the present utility model.

Fig. 2 is a schematic overall cross-sectional view of the present utility model.

Fig. 3 is a schematic view of the inside of the closing seal mechanism for a pipe of the present utility model.

FIG. 4 is a schematic diagram of a servo control assembly according to the present utility model;

FIG. 5 is a schematic diagram of the internal structure of the servo control assembly according to the present utility model;

FIG. 6 is a schematic view of the structure of the plugging member of the present utility model;

FIG. 7 is a schematic diagram of a cross-sectional structure of a lower end of a throttle valve for a Christmas tree according to the present utility model;

FIG. 8 is a schematic view of a guide plate structure according to the present utility model;

FIG. 9 is a schematic diagram of the assembly structure of the present utility model and the tree.

Detailed Description

In order that the above-recited objects, features and advantages of the present utility model will become more readily apparent, a more particular description of the utility model will be rendered by reference to specific embodiments thereof which are illustrated in the appended drawings.

In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present utility model, but the present utility model may be practiced in other ways other than those described herein, and persons skilled in the art will readily appreciate that the present utility model is not limited to the specific embodiments disclosed below.

Further, reference herein to "one embodiment" or "an embodiment" means that a particular feature, structure, or characteristic can be included in at least one implementation of the utility model. The appearances of the phrase "in one embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

Example 1

Referring to fig. 1 to 6, a first embodiment of the present utility model provides a closed sealing mechanism for a pipe, which includes a piston cylinder 100 including a cylinder body 101, sealing members 102 provided on outer end surfaces of both sides of the cylinder body 101, a moving member 103 provided inside a middle portion of the cylinder body 101, and a fixing frame 104 provided at a bottom portion of a lower end of the cylinder body 101;

the servo control assembly 200 is arranged at the outer end of the side surface of the piston hydraulic cylinder 100, and the valve position feedback assembly 300 is arranged at the upper end surface of the piston hydraulic cylinder 100;

the valve position is adjusted through hydraulic oil, and the valve position adjusting device has the advantages of being wide in application range, high in quick dynamic response capability, high in load capacity, excellent in anti-interference performance, convenient to frequently and stably change, and the like.

Further, the sealing assembly 102 includes a sealing cover plate 102a, sealing strips 102b provided at both sides of the sealing cover plate 102a, and sealing bolts 102c provided between the cylinder 101 and the sealing strips 102 b;

wherein, the sealing bolt 102c penetrates the cylinder 101 and the sealing strip 102b respectively, and the top end of the sealing bolt 102c is inserted into the cylinder 101;

the use of the seal assembly 102 seals the cylinder 100 from leaking.

Further, the moving assembly 103 includes a flow chamber 103a provided between the cylinder 101 and the sealing assembly 102, a cavity 103b provided inside the cylinder 101, a piston plate 103c movably provided in the middle of the cavity 103b, and a piston rod 103d provided at the bottom of the lower end of the piston plate 103 c;

wherein, the piston plate 103c and the piston rod 103d are connected with each other by adopting a fixed screw;

hydraulic oil is added into the cylinder 101 to drive the motion assembly 103 to lift, so that the valve position is adjusted.

Further, the servo control assembly 200 includes a housing 201, a biaxial motor 202 disposed inside the left end of the housing 201, a shaft 203 disposed outside the biaxial motor 202, a blocking member 204 disposed at the outer end of the shaft 203, and a guide frame 210 disposed at the outer end face of the blocking member 204;

the servo control assembly 200 further comprises a liquid inlet pipe 205 arranged on the right side surface of the shell 201, two groups of liquid outlet pipes 206 arranged on the top end of the other side of the liquid inlet pipe 205, a baffle 207 arranged in the middle of the shell 201, and a first connecting pipe 208 and a second connecting pipe 209 respectively arranged on the tops of the two ends of the shell 201;

wherein the baffle 207 divides the inside of the housing 201 into two parts, the outer sides of the first connecting pipe 208 and the second connecting pipe 209 are connected with the flow chamber 103a, and the shaft 203 is connected with the inner wall of the blocking member 204 through the screw thread at the top end;

the servo control assembly 200 can be used for adjusting the valve position more accurately, so that the flow is ensured.

Further, the blocking member 204 includes a sleeve 204a, a stopper 204b provided at the top of the outer end of the sleeve 204a, and stopper strips 204c provided at both side surfaces of the sleeve 204 a;

the stop block 204b has a truncated cone-shaped structure, the inclined planes of the stop block 204b and the liquid outlet pipe 206 are the same, and the limit bar 204c is clamped and connected with the inner wall of the guide frame 210.

When the hydraulic oil filling device is used, firstly, hydraulic oil is added into the liquid inlet pipe 205, then when the hydraulic oil needs to be filled into the cylinder 101 from the first connecting pipe 208, the double-shaft motor 202 is remotely controlled to be opened, the double-shaft motor 202 is adopted to drive the shaft rod 203 at the upper end to rotate, and because the shaft rod 203 is in threaded connection with the inner wall of the blocking part 204, the blocking part 204 can be driven to slide until the stop block 204b is inserted into the liquid outlet pipe 206 at the upper end, the liquid outlet pipe 206 at the upper end can be sealed, then the hydraulic oil flows out from the liquid outlet pipe 206 at the lower end and is filled into the cylinder 101 along the first connecting pipe 208, the filled hydraulic oil can drive the piston plate 103c to move upwards, otherwise, the piston plate 103c can be driven to move downwards, so that the valve position adjustment is completed, and the sealing strip 102b is used, so that the inside of the cylinder 101 is in a sealed state, the situation of oil leakage is avoided, and meanwhile, the valve position accuracy of the device control is increased.

In summary, in actual use, the use of seal assembly 102 can seal the both sides face of cylinder body 101, avoids appearing leaking the condition night, simultaneously through the use of servo control assembly 200, can control the hydraulic oil flow and the position of interpolation to this is accomplished the lift to piston plate 103c, finally because the use of valve position feedback assembly 300, makes things convenient for the operating personnel to observe the valve position, can in time adjust.

Example 2

Referring to fig. 1 to 2 and fig. 7 to 9, which are second embodiments of the present utility model, unlike the previous embodiments, this embodiment provides a throttle valve for a christmas tree, including a closing seal mechanism for a pipe, a connection mechanism 400 provided at a lower side end of a piston cylinder 100, and a valve body 500 provided at a lower end surface of the connection mechanism 400;

the valve body 500 includes a frame 501, a flow tube inlet 502 provided at the bottom of the lower end of the frame 501, and a flow tube outlet 503 provided outside the side of the frame 501;

the valve body 500 further includes a guide plate 504 provided at an upper end of the flow tube inlet 502, and a valve plug assembly 505 provided at an upper portion of the guide plate 504;

the use of the valve plug assembly 505 enables sealing of the flow tube inlet 502.

Further, the valve plug assembly 505 includes a sealing plug 505a, and a clamping plate 505b disposed on a lower end surface of the sealing plug 505 a;

the upper side surface of the guide plate 504 is of an arc-shaped structure, and the radian of the upper end surface of the guide plate 504 is the same as that of the lower end surface of the clamping plate 505b;

the guide plate 504 and the chucking plate 505b are bonded to each other.

Further, the connection mechanism 400 includes a connection frame 401, a leakage preventing bar 402 disposed at the lower side of the connection frame 401, and a mounting bar 403 disposed at the middle of the connection frame 401;

wherein, the top of the upper end of the mounting rod 403 is connected with the piston rod 103d, and the leak-proof bar 402 is assembled on the connecting surface of the connecting frame 401 and the frame 501;

the use of the connection mechanism 400 allows the valve body 500 and the piston cylinder 100 to be connected.

Further, the connection mechanism 400 further includes a mounting block 404 provided at the bottom of the lower end of the mounting bar 403;

wherein the mounting block 404 is located inside the sealing plug 505 a;

the sealing plug 505a can be rotated.

In use, the piston rod 103d moves downward to drive the mounting rod 403 to move downward, and then the valve plug assembly 505 moves downward until the guide plate 504 and the clamping plate 505b are completely attached, so that the valve body 500 can be closed, otherwise, the valve plug assembly 505 moves upward to open the valve body 500, and then various liquids or gases can pass through the flow tube inlet 502 and flow out of the flow tube outlet 503, and the position of the valve plug assembly 505 is adjusted to adjust the flow rate of the valve body 500;

next, during installation, as shown in fig. 9, the flow pipe outlet 503 is connected with the christmas tree, so that collected oil can be conveyed into the christmas tree, and the piston hydraulic cylinder 100 can lift the valve plug assembly 505, so that the flow of the throttle valve can be adjusted, and the flow of the christmas tree can be adjusted.

In summary, the guide plate 504 and the clamping plate 505b are adopted to cooperate for use, after the sealing plate is closed, the clamping plate 505b drives the sealing plug 505a to rotate along the guide plate 504, so that the sealing plug 505a and the flow tube inlet 502 can be completely closed, even if the sealing plug 505a is used for a long time, the middle part of the sealing plug 505a is worn, and the guide plate 504 and the clamping plate 505b at the outer end also have a secondary sealing effect, so that the leakage is avoided.

Example 3

Referring to FIG. 4, a third embodiment of the present utility model is provided that, unlike the previous embodiment, provides for specific operation of the valve position feedback assembly 300;

specifically, the valve position feedback assembly 300 includes a viewing window 301, a scale mark 302 disposed on the surface of the viewing window 301, a scale 303 disposed inside the viewing window 301, and a support rod 304 disposed at the bottom of the lower side of the scale 303;

wherein the lower end bottom of the support rod 304 and the moving assembly 103 are connected to each other by a set screw.

When the hydraulic jack is used, the piston plate 103c rises to drive the connected supporting rod 304 to move upwards, the top of the upper end of the supporting rod 304 is provided with the scale 303, the scale 303 is overlapped with the scale mark 302 on the outer side, the corresponding scale mark 302 can be read through the observation window 301, the current valve position is obtained, the higher the position of the scale 303 is, the higher the flow of the throttle valve for the christmas tree is, the lower the position of the scale 303 is, and the flow of the throttle valve for the christmas tree is smaller.

In conclusion, the operator can conveniently observe the valve position through the observation window 301, and then the valve position can be adjusted, so that the valve position is convenient to use.

It is important to note that the construction and arrangement of the present application as shown in a variety of different exemplary embodiments is illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications are possible, for example, variations in the sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, such as temperature, pressure, etc., mounting arrangements, use of materials, colors, orientations, etc., without materially departing from the novel teachings and advantages of the subject matter described in this application. For example, elements shown as integrally formed may be constructed of multiple parts or elements, the position of elements may be reversed or otherwise varied, and the nature or number of discrete elements or positions may be altered or varied. Accordingly, all such modifications are intended to be included within the scope of present utility model. The order or sequence of any process or method steps may be varied or re-sequenced according to alternative embodiments. In the claims, any means-plus-function clause is intended to cover the structures described herein as performing the function and not only structural equivalents but also equivalent structures. Other substitutions, modifications, changes and omissions may be made in the design, operating conditions and arrangement of the exemplary embodiments without departing from the scope of the present utility models. Therefore, the utility model is not limited to the specific embodiments, but extends to various modifications that nevertheless fall within the scope of the appended claims.

Furthermore, in order to provide a concise description of the exemplary embodiments, all features of an actual implementation may not be described (i.e., those not associated with the best mode presently contemplated for carrying out the utility model, or those not associated with practicing the utility model).

It should be appreciated that in the development of any such actual implementation, as in any engineering or design project, numerous implementation-specific decisions may be made. Such a development effort might be complex and time consuming, but would nevertheless be a routine undertaking of design, fabrication, and manufacture for those of ordinary skill having the benefit of this disclosure.

It should be noted that the above embodiments are only for illustrating the technical solution of the present utility model and not for limiting the same, and although the present utility model has been described in detail with reference to the preferred embodiments, it should be understood by those skilled in the art that the technical solution of the present utility model may be modified or substituted without departing from the spirit and scope of the technical solution of the present utility model, which is intended to be covered in the scope of the claims of the present utility model.

Claims (10)

1. A closed sealing mechanism for a pipeline is characterized in that: comprising the steps of (a) a step of,

the piston hydraulic cylinder (100) comprises a cylinder body (101), sealing assemblies (102) arranged on the outer end surfaces of two sides of the cylinder body (101), a moving assembly (103) arranged on the inner side of the middle part of the cylinder body (101), and a fixing frame (104) arranged at the bottom of the lower end of the cylinder body (101);

the hydraulic control system further comprises a servo control assembly (200) arranged at the outer end of the side face of the piston hydraulic cylinder (100), and a valve position feedback assembly (300) arranged on the upper end face of the piston hydraulic cylinder (100).

2. The closure seal mechanism for a pipe as defined in claim 1, wherein: the sealing assembly (102) comprises a sealing cover plate (102 a), sealing strips (102 b) arranged on two sides of the sealing cover plate (102 a), and sealing bolts (102 c) arranged between the cylinder body (101) and the sealing strips (102 b);

the sealing bolt (102 c) penetrates through the cylinder body (101) and the sealing strip (102 b) respectively, and the top end of the sealing bolt (102 c) is inserted into the cylinder body (101).

3. The closure seal mechanism for a pipe as claimed in claim 2, wherein: the motion assembly (103) comprises a flow cavity (103 a) arranged between the cylinder body (101) and the sealing assembly (102), a cavity (103 b) arranged in the cylinder body (101), a piston plate (103 c) movably arranged in the middle of the cavity (103 b), and a piston rod (103 d) arranged at the bottom of the lower end of the piston plate (103 c);

wherein the piston plate (103 c) and the piston rod (103 d) are connected with each other by adopting a fixed screw.

4. A closing seal mechanism for a pipe according to any one of claims 1 to 3, wherein: the servo control assembly (200) comprises a shell (201), a double-shaft motor (202) arranged in the left end of the shell (201), a shaft lever (203) arranged outside the double-shaft motor (202), a blocking component (204) arranged at the outer end of the shaft lever (203), and a guide frame (210) arranged at the outer end face of the blocking component (204);

the servo control assembly (200) further comprises a liquid inlet pipe (205) arranged on the right side surface of the shell (201), two groups of liquid outlet pipes (206) arranged on the top end of the other side of the liquid inlet pipe (205), a baffle plate (207) arranged in the middle of the shell (201), and a first connecting pipe (208) and a second connecting pipe (209) respectively arranged on the tops of two ends of the shell (201);

wherein the baffle plate (207) divides the inside of the shell (201) into two parts, the outer sides of the first connecting pipe (208) and the second connecting pipe (209) are connected with the flow cavity (103 a), and the shaft rod (203) is connected with the inner wall of the blocking component (204) through threads at the top end.

5. The closure seal mechanism for a pipe as defined in claim 4, wherein: the blocking component (204) comprises a sleeve (204 a), a stop block (204 b) arranged at the top of the outer end of the sleeve (204 a), and limit strips (204 c) arranged on the two side surfaces of the sleeve (204 a);

the stop block (204 b) is of a truncated cone-shaped structure, the inclined planes of the stop block (204 b) and the liquid outlet pipe (206) are the same, and the limit strip (204 c) is mutually clamped and connected with the inner wall of the guide frame (210).

6. A closing seal mechanism for a pipe according to any one of claims 1 to 3 and 5, wherein: the valve position feedback assembly (300) comprises an observation window (301), scale marks (302) arranged on the surface of the observation window (301), a scale (303) arranged inside the observation window (301), and a supporting rod (304) arranged at the bottom of the lower side of the scale (303);

wherein the bottom of the lower end of the supporting rod (304) is connected with the moving component (103) through a fixed screw.

7. A throttle valve for a christmas tree, characterized by: comprises the closing and sealing mechanism for the pipeline according to any one of claims 1 to 6, further comprises a connecting mechanism (400) arranged at the lower side end of the piston hydraulic cylinder (100), and a valve body (500) arranged at the lower end surface of the connecting mechanism (400);

the valve body (500) comprises a frame body (501), a flow pipe inlet (502) arranged at the bottom of the lower end of the frame body (501), and a flow pipe outlet (503) arranged outside the side surface of the frame body (501);

the valve body (500) further includes a guide plate (504) disposed at an upper end of the flow tube inlet (502), and a valve plug assembly (505) disposed at an upper portion of the guide plate (504).

8. A throttle for a christmas tree according to claim 7, wherein: the valve plug assembly (505) comprises a sealing plug (505 a) and a clamping plate (505 b) arranged on the lower end surface of the sealing plug (505 a);

the upper side face of the guide plate (504) is of an arc-shaped structure, and the radian of the upper end face of the guide plate (504) is the same as that of the lower end face of the clamping plate (505 b).

9. A throttle for a christmas tree according to claim 8, wherein: the connecting mechanism (400) comprises a connecting frame (401), a leakage-proof strip (402) arranged on the lower side of the connecting frame (401), and a mounting rod (403) arranged in the middle of the connecting frame (401);

wherein the top of the upper end of the mounting rod (403) is connected with the piston rod (103 d), and the leak-proof strip (402) is assembled on the connecting surface of the connecting frame (401) and the frame body (501).

10. A throttle for a christmas tree according to claim 9, wherein: the connecting mechanism (400) further comprises a mounting block (404) arranged at the bottom of the lower end of the mounting rod (403);

wherein the mounting block (404) is located inside the sealing plug (505 a).