CN216789244U - Stop valve - Google Patents

Abstract

The utility model discloses a stop valve, which belongs to the technical field of refrigeration, and comprises a valve body and a valve cap, wherein a connecting block is fixedly arranged on the valve body, at least part of the connecting block extends out of the valve body, an installation part is arranged on the outer wall of the connecting block extending out of the valve body, a matching part matched and connected with the installation part is arranged on the inner wall of the valve cap, the valve cap is sleeved on the connecting block and detachably connected with the installation part of the connecting block through the matching part, the connecting block is additionally arranged on the valve body in the scheme, an assembly structure such as a thread and the like does not need to be processed on the valve body, the processing technology of the valve body is reduced, the processing difficulty of the valve body is reduced, the strength of the valve body is ensured, the requirements on the performance of all aspects such as the material and the thickness of the valve body are reduced, meanwhile, the connecting block has strong plasticity, the design and the processing can be carried out on the connecting block as required, the connecting block is more beneficial to the operation, and the installation effect is improved.

Description

Stop valve

Technical Field

The utility model relates to the technical field of refrigeration, in particular to a stop valve.

Background

The stop valve is widely applied to equipment such as air conditioners, hydraulic mechanisms and the like as a common throttling element, generally comprises a valve body and a valve core arranged in the valve body, a valve seat with a valve port is arranged in a valve pipe in the valve body, the valve core moves up and down in the valve body to realize the opening and closing of the valve port, in order to protect components in the valve body such as the valve core and the like, the upper end of the valve body is provided with a valve cap which is generally made of plastic, in the prior art, the valve cap is sleeved on the valve body and is in interference fit with the valve body, the valve cap is fixed through expansion deformation of the valve cap, the valve cap is easy to drop, the thermal stability of plastic is poor, and the valve cap is greatly influenced by temperature, so that the condition that the valve cap is too tight or too loose along with the change of the temperature.

In order to improve the stability of valve cap installation, valve cap and valve body also can adopt threaded connection among the prior art, concretely, be equipped with the external screw thread on the valve body, be equipped with on the valve cap with external screw thread complex internal thread, the firmness of valve cap on the valve body has been improved through the screw thread closes, nevertheless just so can improve performance and the processing requirement to the valve body, if in order to realize the setting of screw thread, the valve body need adopt specific material, valve pipe thickness also can not be too thin, especially to the stainless steel valve body, the thread machining degree of difficulty is bigger, be difficult to realize.

SUMMERY OF THE UTILITY MODEL

The object of the present invention is to disclose a shut-off valve that at least partly solves the above mentioned problems.

In order to solve the technical problem, the utility model adopts the following technical scheme:

the utility model provides a stop valve, includes valve body and valve cap, set firmly the connecting block on the valve body, the connecting block is at least partly stretched out outside the valve body, stretches out the valve body is external the outer wall of connecting block is equipped with the installation department, the inner wall of valve cap be equipped with the cooperation portion that the installation department cooperation is connected, the valve cap cover is established on the connecting block and pass through the cooperation portion with the connection can be dismantled to the installation department of connecting block.

The beneficial effect of this scheme of adoption:

based on prior art, the valve cap leads to cooperation poor stability with valve body lug connection, the high problem of valve body processing requirement, establish the connecting block in addition on the valve body in this scheme, the cooperation of the installation department through the connecting block and the cooperation portion of valve cap, realize the installation of valve cap, need not assembly structure such as processing screw thread again on the valve body, reduce the processing technology of valve body, the valve body processing degree of difficulty has been reduced, the intensity of valve body has been guaranteed, reduce the requirement to each side performance such as valve body material and thickness, connecting block plasticity is strong simultaneously, can design and process on it as required, more do benefit to the operation, promote the installation effect.

As preferred, the valve cap with the cooperation of connecting block joint, joint cooperation firm in connection, the valve cap is difficult for droing, has improved the stability after the valve cap installation.

Preferably, the mounting portion with one of the cooperation portion be the arch, another be with protruding complex recess, protruding card is gone into form joint cooperation structure in the recess, protruding and groove structure are simple, easily processing, the operation of being convenient for.

Preferably, the protrusions comprise annular protrusions which extend continuously along the circumferential direction, the protrusions are of a continuous uninterrupted structure, the protrusion strength is guaranteed, the protrusions are not prone to abrasion when the protrusions are clamped and pulled out, the contact area of the annular protrusions and the grooves is larger, friction force is large, and the axial limiting effect is better.

Preferably, the protrusions comprise a plurality of protrusions arranged at intervals along the circumferential direction, the protrusions are easier to process, and materials are saved.

As preferred, the valve cap with connecting block screw-thread fit, be equipped with first external screw thread on the connecting block and form the installation department, be equipped with on the valve cap with first external screw thread complex's first internal thread, first internal thread forms cooperation portion, threaded connection simple structure, easily processing, connect reliably, easy dismounting, and through adjusting first external screw thread and the spiral shell position of first internal thread and adjusting the insertion stroke of connecting block in the valve cap.

Preferably, the valve body comprises an upper port, the connecting block is inserted into the upper port, the connecting block is partially overlapped with the valve body, the fixed area is increased, the connecting strength of the connecting block on the valve body is guaranteed, meanwhile, stress concentration is avoided, and the possibility that the connecting block is broken and separated from the valve body is reduced.

Preferably, the lower terminal surface of valve cap with the up end butt of going up the port, the up end of valve body upper port plays axial limiting displacement to the valve cap, prevents that the valve cap pressurization from excessively being damaged, simultaneously, because the valve cap generally adopts plastics material, deformation volume is great during the butt extrusion to play better sealed effect, prevent that impurity such as external dust and powder from getting into inside the valve body.

Preferably, the valve body is further provided with a valve core, the valve core penetrates through the connecting block, a second external thread is arranged on the valve core, a second internal thread is arranged on the connecting block, the second external thread is screwed with the second internal thread to realize the movement of the valve core in the valve body, the valve opening and the valve closing are realized through the movement of the valve core, an internal thread matched with the external thread of the valve core is arranged on the connecting block, an internal thread or an internal thread sleeve does not need to be arranged on the valve body, the valve body is multipurpose integrally, hardware materials are saved, the processing and mounting steps are reduced, and meanwhile, the mounting hole and the valve core are matched to seal the valve body so as to prevent impurities such as external dust and powder from entering the interior of the valve body under the condition that the valve cap needs to be operated and taken down.

Preferably, the end face, far away from the valve cap, of the connecting block is provided with a limiting part for limiting the axial stroke of the valve core.

These features and advantages of the present invention will be disclosed in more detail in the following detailed description and the accompanying drawings.

Drawings

The utility model is further described with the following drawings:

fig. 1 is a schematic perspective view of the stop valve of the present invention.

Fig. 2 is an exploded view of a stop valve according to an embodiment of the present invention.

Fig. 3 is a cross-sectional view of a shut-off valve according to an embodiment of the present invention.

Fig. 4 is an enlarged view of a portion a in fig. 3.

FIG. 5 is a perspective view of a bonnet according to an embodiment of the utility model.

Fig. 6 is a schematic perspective view of a connection block according to an embodiment of the present invention.

Fig. 7 is a cross-sectional view of a shut-off valve according to an embodiment of the present invention.

Fig. 8 is an enlarged view of fig. 7 at B.

FIG. 9 is a perspective view of a bonnet according to an embodiment of the utility model.

Fig. 10 is a schematic perspective view of a connection block according to an embodiment of the utility model.

Fig. 11 is a schematic perspective view of the valve core of the present invention.

Reference numerals:

100. a stop valve;

10. a valve body; 11. an upper port; 11a, the upper end face of the upper port; 12. a first opening; 13. a second opening;

20. a valve seat; 21. a valve port;

30. a valve core; 31. a valve stem; 311. a second external thread; 32. a connecting portion; 321. a step; 332. a second seal member; 323. mounting grooves; 334. a third seal member; 33. a sealing part; 34. an operation section;

40. a bonnet; 40a, the lower end face of the bonnet; 41. a first internal thread; 411. a first internal thread; 412. a first internal thread socket; 42. an annular projection;

50. a first adapter tube;

60. a second adapter tube;

70. connecting blocks; 71. a first external thread; 711. a first external thread; 712. a first external thread socket; 72. a second internal thread; 73. an annular groove; 74. a limiting part;

80. a first seal member;

90. a valve assembly; 91. a linker; 92. a valve core; 93. a housing; 94. a fourth seal member; 95. an elastic member.

Detailed Description

The technical solutions of the embodiments of the present invention are explained and illustrated below with reference to the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention, and not all embodiments. Based on the embodiments in the implementation, other embodiments obtained by those skilled in the art without any creative effort belong to the protection scope of the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of the present invention, unless otherwise specified, "a plurality" means two or more unless explicitly defined otherwise.

In the present invention, unless otherwise expressly specified or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, "above" or "below" a first feature means that the first and second features are in direct contact, or that the first and second features are not in direct contact but are in contact with each other via another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

In this embodiment, when referring to the orientation words such as up, down, left, and right, the stop valve is the vertical installation state shown in the attached drawings by default, and when referring to the axial direction, the stop valve is the central axis direction along the valve core by default, and the description is omitted below.

The shutoff valve 100 and refrigeration system of the present invention will be described in further detail with reference to the following detailed description and accompanying drawings:

the utility model provides a stop valve 100, which can be applied to a medium passage of an air-conditioning refrigeration system, circularly transfers heat in a circulating system through a refrigerant to realize temperature reduction, controls the cut-off and the circulation of the passage, and is used for supplementing a medium to the refrigeration system.

Referring to fig. 1 to 11, the shutoff valve 100 includes: the valve comprises a valve body 10, a valve seat 20, a valve core 30 and a valve cap 40, wherein the valve body 10 is of a hollow structure provided with an upper port 11 and comprises a first opening 12 and a second opening 13, and the first opening 12 and the second opening 13 form a circulation passage for a refrigerant medium to flow; the valve seat 20 is arranged in the valve body 10 and is positioned at the first opening 12, a valve port 21 is arranged on the valve seat 20, and the valve port 21 and the second opening 13 form a circulation channel; the valve core 30 is installed on the valve body 10 and can move axially relative to the valve body 10 to open or close the valve port 21; the valve cap 40 is disposed at the upper end of the valve body 10 and covers the valve core 30 to protect the valve core 30 from dust and moisture.

In the prior art, the stop valve is a brass valve body, but the cost of brass is high, so the valve body 10 is a stainless steel valve body.

Referring to fig. 1 to 3 and 7, in the present embodiment, the upper port 11 is located at an upper side of the valve body 10, and the first opening 12 and the second opening 13 are opened at a lower side and a right side of the valve body 10. One side of the first opening 12, which is far away from the valve body 10, is connected with a first connecting pipe 50, and the first opening 12 is communicated with the outside through the first connecting pipe 50; a second connecting pipe 60 is connected to a side of the second opening 13 away from the valve body 10, and the second opening 13 is communicated with the outside through the second connecting pipe 60. The first connection pipe 50 and the second connection pipe 60 serve as an inlet or an outlet, respectively, for the refrigerant medium. When the first connection pipe 50 is used as an inlet of the refrigerant medium, the refrigerant medium enters the stop valve 100 from the first connection pipe 50 and enters the valve body 10 through the first opening 12, and if the stop valve 100 is in an open state, the refrigerant medium passes through the first opening 12 and flows out of the stop valve 100 through the second connection pipe 60; vice versa, the refrigerant medium can also enter the valve body 10 from the second connecting pipe 60 via the second opening 13 and then flow out of the shut-off valve 100 via the first opening 12 and the first connecting pipe 50.

Alternatively, the positions of the first opening 12 and the second opening 13 are not limited to being opened on the lower side and the right side of the valve body 10 in the present embodiment. In other embodiments, the first opening 12 and the second opening 13 may be disposed on the left and right sides, the upper and lower sides, and the like of the valve body 10, as long as the communication or the blocking between the two valve ports 21 can be achieved by the axial movement of the valve spool 30.

The valve cap 40 is generally made of plastic, in the prior art, the valve cap 40 is directly sleeved on the valve body 10 and is fixed to the valve body 10 in an interference fit or threaded connection mode, but the valve cap 40 is easy to drop in the interference fit mode, the valve cap 40 is too tight or too loose along with temperature change, the difficulty of forming threads on the stainless steel valve body 10 is large, and the strength of the valve body 10 is affected.

In order to solve the problems in the prior art, referring to fig. 2, fig. 3 and fig. 7, according to an embodiment of the present invention, in order to implement the installation of the bonnet 40, a connecting block 70 is further fixedly installed on the valve body 10, at least a portion of the connecting block 70 extends out of the valve body 10, an outer wall of the connecting block 70 extending out of the valve body 10 is provided with an installation portion, an inner wall of the bonnet 40 is provided with a matching portion in matching connection with the installation portion, and the bonnet 40 is sleeved on the connecting block 70 and detachably connected with the installation portion of the connecting block 70 through the matching portion.

In this embodiment, establish connecting block 70 in addition on valve body 10, need not to process assembly structures such as screw on valve body 10 again, reduce the processing technology of valve body 10, reduced the valve body 10 processing degree of difficulty, guaranteed the intensity of valve body 10, reduce the requirement to aspects performance such as valve body 10 material and thickness, connecting block 70 plasticity is strong simultaneously, can design and process on it as required, more do benefit to the operation, the assembly effect is better, promote the installation effect.

Referring to fig. 3 and 7, the valve body 10 includes a valve tube with two open ends, the two open ends of the valve tube form the upper port 11 and the first opening 12, the second opening 13 is opened on the side wall of the valve tube, the connecting block 70 is arranged at the upper port 11 of the valve tube, preferably, the connecting block 70 is inserted in the upper port 11, the part of the connecting block 70 inserted in the upper port 11 is fixedly connected with the upper port 11, such as welding, and the connecting block 70 is partially overlapped with the valve body 10, the fixing area is increased, the connecting strength of the connecting block 70 on the valve body 10 is ensured, and meanwhile, the problem that the connecting block 70 is broken and separated from the valve body 10 due to stress concentration caused by butt welding the bottom end of the connecting block 70 and the upper port 11 is avoided.

In order to improve the stability of the bonnet 40 after installation, the bonnet 40 is in clamping fit with the connecting block 70, the clamping fit is firm in connection, and the bonnet 40 is not easy to fall off.

According to the embodiment of the utility model, in order to simplify the structure and reduce the processing and operation difficulty, the clamping structure is a matching structure of a protrusion and a groove, the matching part is the protrusion, the mounting part is the groove, specifically, the inner wall of the valve cap 40 is provided with the protrusion, the outer wall of the connecting block 70 is provided with the groove matched with the protrusion, when the valve cap is mounted, the protrusion is clamped into the groove, clamping can be realized, the protrusion is preferably an annular protrusion 42 continuously extending along the circumferential direction, the connecting block 70 is correspondingly provided with an annular groove 73 matched with the annular protrusion 42, the protrusion is of a continuous structure, the protrusion strength is ensured, the valve cap is not easily worn when the valve cap is clamped and pulled out, the contact area between the annular protrusion 42 and the annular groove 73 is larger, the friction force is large, and the axial limiting effect is better.

Of course, in other embodiments, an annular projection may be provided on the connecting block, and an annular groove may be correspondingly provided on the valve cap to cooperate with the annular projection.

Of course, in other embodiments, the protrusions may also be a plurality of protrusions arranged at intervals in the circumferential direction, so that the protrusions are easier to process and material is saved.

If the bonnet 40 is excessively pressed downwards during assembly, which is likely to damage the snap-fit structure, the bonnet 40 is also broken, so as to, as shown in fig. 1, 3 and 4, limit the bonnet 40 to be snapped to the connecting block 70 in this embodiment, the lower end surface 40a of the bonnet abuts against the upper end surface 11a of the upper port, so that the upper end surface 11a of the upper port of the valve body 10 has an axial limiting effect on the bonnet 40, meanwhile, because the bonnet 40 is generally made of plastic, the deformation amount is large during abutting extrusion, so as to achieve a good sealing effect, and prevent foreign matters such as external dust and powder from entering the valve body 10.

Of course, in other embodiments, other snap features, such as a snap-fit configuration, may be used for the bonnet 40 and the connector block 70.

Referring to fig. 7 to 10, according to an embodiment of the present invention, the bonnet 40 is threadedly engaged with the connection block 70, a portion of the connection block 70 protruding out of the valve body 10 is provided with a first external thread 71 to form a mounting portion, the bonnet 40 is provided with a first internal thread 41 engaged with the first external thread 71, and the first internal thread 41 forms an engaging portion.

The threaded connection structure is simple, easy to process, reliable in connection and convenient to disassemble and assemble, and the matching depth between the connecting block 70 and the bonnet 40 is adjusted by adjusting the screwing position of the first external thread 71 and the first internal thread 41. Simultaneously, adopt screw-thread fit, valve cap 40 can also regard as compressing tightly the piece to use, through spiral shell valve cap 40 downwards, makes the lower terminal surface of valve cap 40 and the up end butt of last port 11 compress tightly the butt, guarantees sealed effect.

Referring to fig. 3, 4, 7 and 8, the valve element 30 of the present embodiment is inserted into the connecting block 70, the valve element 30 is provided with an external thread, i.e., a second external thread 311, the connecting block 70 is provided with an internal thread, i.e., a second internal thread 72, the second external thread 311 is screwed with the second internal thread 72 to realize the movement of the valve element 30 in the valve body 10, and the valve opening and closing is realized by the movement of the valve element 30.

Specifically, as shown in fig. 2-4, 7, 8 and 11, the valve element 30 includes a valve rod 31, a connecting portion 32 and a sealing portion 33, the valve rod 31 and the sealing portion 33 are disposed at two ends of the connecting portion 32, the sealing portion 33 is closer to the valve seat 20, the valve rod 31 is provided with a second external thread 311 engaged with a second internal thread 72 of the connecting block 70, the connecting portion 32 and the sealing portion 33 are driven to move axially by driving the valve rod 31 to screw on the connecting block 70, so that the sealing portion 33 is inserted into the valve port 21 or removed from the valve port 21, thereby realizing valve closing or opening. Referring to fig. 4, 8 and 11, the valve rod 31 partially extends out of the connecting block 70, and the valve rod 31 is provided with an operating portion 34 for operating the valve plug 30, specifically, the valve rod 31 is a hollow structure extending inward from the upper end surface of the valve rod 31, and a plurality of planes are uniformly distributed on the inner surface of the valve rod 31 at intervals, so that the valve plug can be adapted to a tool such as a hexagon socket wrench.

In other embodiments, the flat surfaces of the inner surface of the valve stem 31 may be arranged to be unevenly spaced to accommodate irregular wrenches.

The second internal thread 72 matched with the second external thread 311 of the valve core 30 is arranged on the connecting block 70, the valve body 10 is integrated and multipurpose, an internal thread or an internal thread sleeve does not need to be arranged on the valve body 10, hardware materials are saved, machining and installation steps are reduced, and meanwhile, the connecting block 70 is matched with the valve core 30 to seal the valve body 10 so as to prevent impurities such as external dust and powder from entering the interior of the valve body 10 under the condition that the valve cap 40 needs to be operated and taken down.

Referring to fig. 3 and 7, the outer side wall of the connecting portion 32 abuts against the inner wall of the valve body 10, so that the valve element 30 can move axially along the inner wall of the valve body 10. The diameter of connecting portion 32 is greater than the diameter of valve rod 31 for form step 321 between connecting portion 32 and the valve rod 31, be equipped with first sealing member 80 on the step 321, when the circulation passageway was opened to the biggest, first sealing member 80 centre gripping was between step 321 and connecting block 70, above-mentioned first sealing member 80 butt live connecting block 70 promptly, first sealing member 80 can play the cushioning effect, and strengthen the leakproofness between the two, the terminal surface of connecting block 70 far away from the valve cap 40, the lower terminal surface of connecting block 70 is equipped with spacing portion 74 promptly, play the upper limit effect to case 30 axial displacement stroke.

A second seal 332 is further provided at one end of the connecting portion 32 close to the valve rod 31, the second seal 332 circumferentially surrounds an outer circumferential side of the connecting portion 32, and the outer circumferential side of the second seal 332 circumferentially abuts against an inner wall of the valve body 10, thereby sealing the valve body 10 so that the medium does not leak during the flow of the medium between the first opening 12 and the second opening 13. In other embodiments, the second sealing member 332 may be replaced with a gasket or the like that also serves as a sealing member.

Referring to fig. 3 and 7, an end surface of the connection portion 32 facing the notch of the valve port 21 is provided with an installation groove 323, a third sealing member 334 is embedded in the annular installation groove 323, and the third sealing member 334 can abut against the valve seat 20 and can seal the valve port 21 in the closed state of the shutoff valve 100.

Further, as shown in fig. 1-3 and 7, the shut-off valve 100 further includes a valve assembly 90, the valve assembly 90 being connected to the valve body 10. In this embodiment, the valve assembly 90 is disposed opposite the second opening 13, and serves as a charging inlet or a discharging outlet for charging or discharging the entire refrigeration system with medium. In other embodiments, the axis of the valve assembly 90 may be perpendicular to the axis of the second opening 13, and the valve assembly 90 may be disposed at other positions of the valve body 10.

The valve assembly 90 comprises a connecting body 91, the connecting body 91 is connected to the valve body 10, and the connecting body 91 serves as a passage for a medium to pass into the valve body 10.

The valve assembly 90 also includes a valve core 92, a cover 93, and a fourth seal 94. The valve core 92 is arranged in the connecting body 91, so that the interior of the valve body 10 can be communicated with or separated from the interior of the connecting body 91, and the cover 93 is sleeved on the outer peripheral side of the connecting body 91 and used for protecting the valve core 92 and preventing external impurities from entering; a fourth seal 94 is located between the housing 93 and the connecting body 91 and cooperates with the housing 93 to seal the connecting body 91.

Specifically, the valve core 92 is provided with an elastic member 95 at one end thereof, which maintains a closed state when the valve core 92 is not subjected to an external pressure, and at this time, the connecting body 91 maintains a seal to block the interior of the valve body 10 from the outside. When the valve core 92 is pressurized, the valve core 92 presses the elastic member 95 and moves toward the direction close to the valve body 10, thereby releasing the seal, so that the inside of the valve body 10 communicates with the inside of the connecting body 91, thereby allowing the medium to flow into the inside of the valve body 10 or flow out of the inside of the valve body 10. The elastic member 95 is used for resetting the valve core 92.

The above embodiments are merely examples and do not limit the scope of the utility model. On the basis of this, a person skilled in the art can envision other embodiments that perform the same function within the scope of the claims of the present invention.

Claims (10)

1. The utility model provides a stop valve, includes valve body and valve cap, a serial communication port, the connecting block sets firmly on the valve body, the connecting block at least part stretches out outside the valve body, stretches out the valve body is external the connecting block outer wall is equipped with the installation department, the valve cap inner wall be equipped with the cooperation portion that the installation department cooperation is connected, the valve cap cover is established on the connecting block and pass through cooperation portion with the connection can be dismantled to the installation department of connecting block.

2. The shut-off valve of claim 1, wherein the bonnet snap-fits to the connector block.

3. The stop valve of claim 2, wherein one of the mounting portion and the engagement portion is a protrusion, and the other of the mounting portion and the engagement portion is a groove engaged with the protrusion, and the protrusion is engaged with the groove to form a snap engagement structure.

4. The shut-off valve of claim 3, wherein the projection comprises an annular projection extending continuously in the circumferential direction.

5. The shut-off valve of claim 3, wherein the projection comprises a plurality of circumferentially spaced projections.

6. The shut-off valve of claim 1, wherein the bonnet is threadably engaged with the connecting block, the connecting block is provided with a first external thread forming the mounting portion, the bonnet is provided with a first internal thread engaged with the first external thread, and the first internal thread forms the engaging portion.

7. The shut-off valve of any one of claims 1 to 6, wherein the valve body includes an upper port in which the connecting block is inserted.

8. The shut-off valve of claim 7, wherein a lower end surface of the bonnet abuts an upper end surface of the upper port.

9. The stop valve according to any one of claims 1 to 6, characterized in that the valve body is further provided with a valve core, the valve core is arranged on the connecting block in a penetrating manner, the valve core is provided with a second external thread, the connecting block is provided with a second internal thread, and the second external thread is screwed with the second internal thread to realize the movement of the valve core in the valve body.

10. The shut-off valve of claim 9, wherein an end surface of the connecting block remote from the bonnet is provided with a limiting portion for limiting axial travel of the valve spool.

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