Valve leakage under-pressure sealing device

Abstract

The utility model relates to a valve leakage under-pressure sealing device which comprises a gland side clamping component, a copper sleeve side clamping component and a tensioning component, and the gland side clamping component is composed of a plurality of first clamping blocks which are detachably connected in the circumferential direction. The gland side clamping component is provided with a first assembly hole used for hooping a valve rod and a plurality of first installation structures evenly distributed in the circumferential direction of the first assembly hole. The copper sleeve side clamping component is composed of a plurality of second clamping blocks detachably connected in the circumferential direction, and the copper sleeve side clamping component is provided with a second assembling hole used for hooping the valve rod and a plurality of second mounting structures evenly distributed in the circumferential direction of the second assembling hole. The tensioning component is connected with the first mounting structure and the second mounting structure, and the length of the tensioning component is adjustable. According to the valve leakage under-pressure sealing device, a plugging agent does not need to be injected, the valve is not damaged, a new effective sealing structure can be rebuilt at a leakage defect part under the condition that normal operation of the valve is not affected, an equipment unit is prevented from being forced to stop, and economic losses are reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of valve sealing, in particular to a valve leakage pressure sealing device. Background Art

[0002] High-temperature and high-pressure valves are commonly used in thermal power plants. They are generally sealed with packings. The packings are usually woven from softer threads and wrapped around the valve stem. The two ends of the packings are respectively compressed by the packing gland and the copper sleeve. When used, the packings of high-temperature and high-pressure valves often leak. Generally, this problem is solved by tightening the packing gland bolts to further compress the packing gland. However, under high temperature conditions, the packing gland bolts often bite or rust, making them unable to be tightened, or even breaking the packing gland bolts, which forces the equipment unit to shut down and causes economic losses.

[0003] At present, the sealing effect is usually achieved by injecting plugging agents into the stuffing box. However, the plugging agent has a high hardness after solidification, which makes the valve stem unable to rotate and the valve unable to operate. It can only maintain the current opening, and it is difficult to clean and repair after shutdown. Utility Model Content

[0004] The utility model aims to provide a valve leakage pressure sealing device, so as to re-establish a new effective sealing structure at the leakage defective part without affecting the normal operation of the valve, so as to avoid the forced shutdown of the equipment unit and reduce economic losses.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A valve leakage pressure sealing device, comprising:

[0007] A gland side clamping member, the gland side clamping member is composed of a plurality of first clamping blocks detachably connected along the circumferential direction, the gland side clamping member is provided with a first assembly hole and a first mounting structure, the first assembly hole is used to clamp the valve stem of the valve, and a plurality of the first mounting structures are evenly distributed around the first assembly hole in the circumferential direction;

[0008] A copper sleeve side clamping member, the copper sleeve side clamping member is composed of a plurality of second clamping blocks detachably connected along the circumferential direction, the copper sleeve side clamping member is provided with a second assembly hole and a second mounting structure, the second assembly hole is used to clamp the valve stem of the valve, and a plurality of the second mounting structures are evenly distributed around the second assembly hole in the circumferential direction;

[0009] A tensioning member, two ends of which are respectively connected to the first mounting structure and the second mounting structure, and the length of the tensioning member is adjustable.

[0010] In one embodiment of the present application, one of the mating surfaces of two adjacent first clamping blocks is provided with a first dovetail tenon, and the other of the mating surfaces of two adjacent first clamping blocks is provided with a first dovetail slot, and the first dovetail tenon cooperates with the first dovetail slot to detachably connect the two adjacent first clamping blocks;

[0011] A second dovetail tenon is provided on one of the mating surfaces of two adjacent second clamping blocks, and a second dovetail slot is provided on the other of the mating surfaces of two adjacent first clamping blocks. The second dovetail tenon cooperates with the second dovetail slot to detachably connect the two adjacent first clamping blocks.

[0012] In one embodiment of the present application, one of the two mating surfaces at both ends of the first clamping block is provided with the first dovetail tenon, and the other is provided with the first dovetail slot;

[0013] One of the two matching surfaces at both ends of the second clamping block is provided with the second dovetail tenon, and the other matching surface is provided with the second dovetail groove.

[0014] In one embodiment of the present application, the gland-side clamping member is provided with a plurality of avoidance structures arranged at intervals along the circumferential direction, and the avoidance structures are used to avoid the bolts of the packing gland of the valve.

[0015] In one embodiment of the present application, the clamping member on the pressure cover side is provided with a first packing structure coaxial with the first assembly hole, and the first packing structure is used to seal the gap between the clamping member on the pressure cover side and the valve stem of the valve, and / or, the clamping member on the copper sleeve side is provided with a second packing structure coaxial with the second assembly hole, and the second packing structure is used to seal the gap between the clamping member on the copper sleeve side and the valve stem of the valve.

[0016] In one embodiment of the present application, the first packing structure includes a packing groove and a packing gland, the packing groove is arranged on a side surface of the gland side clamping member away from the copper sleeve side clamping member, the packing groove is coaxial with the first assembly hole, and the packing gland is detachably connected to the gland side clamping member to compress the packing in the packing groove.

[0017] In one embodiment of the present application, the tensioning member comprises:

[0018] A positive wire screw rod, one of the first mounting structure and the second mounting structure is connected to a first end of the positive wire screw rod;

[0019] A reverse screw rod, the other of the first mounting structure and the second mounting structure being connected to a first end of the reverse screw rod;

[0020] A sleeve, wherein two ends of the sleeve are respectively provided with a positive thread hole and a negative thread hole, the positive thread hole is threadedly connected to the second end of the positive thread rod, and the negative thread hole is threadedly connected to the second end of the negative thread rod.

[0021] In one embodiment of the present application, the first mounting structure is a first threaded hole that cooperates with the positive screw thread, and the second mounting structure is a second threaded hole that cooperates with the negative screw thread.

[0022] In one embodiment of the present application, a rotation auxiliary structure is provided on the outer peripheral tube wall of the sleeve, and the rotation auxiliary structure is used to cooperate with a tool to drive the sleeve to rotate.

[0023] In one embodiment of the present application, the rotation auxiliary structure includes a plurality of drive holes arranged at intervals along the circumference of the sleeve; or, the rotation auxiliary structure includes a plurality of drive rods arranged at intervals along the circumference of the sleeve; or, the rotation auxiliary structure includes an external hexagonal structure arranged on the sleeve.

[0024] It can be seen from the above technical scheme that the utility model discloses a valve leakage pressure sealing device, including a gland side clamping member, a copper sleeve side clamping member and a tensioning member, wherein the gland side clamping member is composed of a plurality of first clamping blocks detachably connected along the circumferential direction, the gland side clamping member is provided with a first assembly hole and a first mounting structure, the first assembly hole is used to clamp the valve stem of the valve, and the plurality of first mounting structures are evenly distributed around the first assembly hole; the copper sleeve side clamping member is composed of a plurality of second clamping blocks detachably connected along the circumferential direction, the copper sleeve side clamping member is provided with a second assembly hole and a second mounting structure, the second assembly hole is used to clamp the valve stem of the valve, and the plurality of second mounting structures are evenly distributed around the second assembly hole; the two ends of the tensioning member are respectively connected to the first mounting structure and the second mounting structure, and the length of the tensioning member is adjustable.

[0025] When in use, the clamping member on the gland side is installed on the valve stem of the valve from the side of the packing gland away from the copper sleeve, and the clamping member on the copper sleeve side is installed on the valve stem from the side of the copper sleeve away from the packing gland. Then, the two ends of the tensioning member are respectively installed on the clamping member on the gland side and the clamping member on the copper sleeve side. Then, the length of the tensioning member is adjusted so that the tensioning member applies tension to the clamping member on the gland side and the clamping member on the copper sleeve side, thereby applying pressure to the packing teeth and the copper sleeve to further tighten the packing. It can be seen that this valve leakage pressure sealing device does not require the injection of plugging agents and does not cause any damage to the valve. A new effective sealing structure can be re-established at the leakage defect location without affecting the normal operation of the valve, thereby avoiding forced shutdown of the equipment unit and reducing economic losses. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0027] Figure 1 A schematic diagram of the structure of a valve leakage pressure sealing device provided by an embodiment of the utility model;

[0028] Figure 2 A schematic structural diagram of a clamping member on the gland side of a valve leakage pressure sealing device provided by an embodiment of the utility model;

[0029] Figure 3 A schematic structural diagram of one of the two first clamping blocks that cooperate with each other in the clamping member on the gland side of the valve leakage pressure sealing device provided by the embodiment of the utility model;

[0030] Figure 4 A structural schematic diagram of the other of the two first clamping blocks that cooperate with each other in the clamping member on the gland side of the valve leakage pressure sealing device provided by the embodiment of the utility model;

[0031] Figure 5 A schematic structural diagram of the copper sleeve side clamping member of the valve leakage pressure sealing device provided by the embodiment of the utility model;

[0032] Figure 6 A schematic structural diagram of one of the two second clamping blocks that cooperate with each other in the copper sleeve side clamping member of the valve leakage pressure sealing device provided by the embodiment of the utility model;

[0033] Figure 7 A schematic structural diagram of another one of the two second clamping blocks that cooperate with each other in the copper sleeve side clamping member of the valve leakage pressure sealing device provided by an embodiment of the utility model;

[0034] Figure 8 A schematic structural diagram of a tensioning member of a valve leakage pressure sealing device provided in an embodiment of the utility model.

[0035] In the figure:

[0036] 1 is a clamping member on the gland side; 101 is a first clamping block; 102 is a first dovetail tenon; 103 is a first dovetail slot; 104 is a first assembly hole; 105 is a stuffing slot; 106 is a U-shaped opening slot; 107 is a first threaded hole; 2 is a clamping member on the copper sleeve side; 201 is a second clamping block; 202 is a second dovetail tenon; 203 is a second dovetail slot; 204 is a second assembly hole; 205 is a second threaded hole; 3 is a tensioning member; 301 is a positive screw rod; 302 is a negative screw rod; 303 is a sleeve; 3031 is a lumen; 3032 is an external hexagonal structure; 4 is a valve stem. DETAILED DESCRIPTION

[0037] The core of the utility model is to provide a valve leakage pressure sealing device. The structural design of the valve leakage pressure sealing device enables it to re-establish a new effective sealing structure at the leakage defect location without affecting the normal operation of the valve, thereby avoiding forced shutdown of the equipment unit and reducing economic losses.

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] See also Figure 1 , Figure 1 A schematic structural diagram of a valve leakage pressure sealing device provided in an embodiment of the utility model.

[0040] The first embodiment of the utility model discloses a valve leakage pressure sealing device, which comprises a gland side clamping component 1, a copper sleeve side clamping component 2 and a tensioning component 3.

[0041] Among them, the gland side clamping member 1 is composed of multiple first clamping blocks 101 that are detachably connected along the circumferential direction, that is, the gland side clamping member 1 includes at least two first clamping blocks 101, and the gland side clamping member 1 is provided with a first assembly hole 104 and a first mounting structure. The first assembly hole 104 is used to clamp the valve stem 4 of the valve, and multiple first mounting structures are evenly distributed around the first assembly hole 104 in the circumferential direction. The first mounting structure includes but is not limited to structures such as holes, grooves, rods, and rings.

[0042] The copper sleeve side clamping member 2 is composed of a plurality of second clamping blocks 201 detachably connected along the circumferential direction, that is, the copper sleeve side clamping member 2 includes at least two second clamping blocks 201, and the copper sleeve side clamping member 2 is provided with a second assembly hole 204 and a second mounting structure, the second assembly hole 204 is used to clamp the valve stem 4 of the valve, and a plurality of second mounting structures are evenly distributed around the second assembly hole 204 in the circumferential direction, and the second mounting structure includes but is not limited to structures such as holes, grooves, rods, and lifting rings.

[0043] The two ends of the tensioning member 3 are respectively connected to the first mounting structure and the second mounting structure. The length of the tensioning member 3 is adjustable. The tensioning member 3 can adopt a hard structure, such as a rod-shaped structure, or a soft structure, such as a steel cable. The tensioning member 3 can be arranged parallel to the valve stem 4, or can be arranged inclined relative to the valve stem 4.

[0044] Compared with the prior art, the valve leakage pressure sealing device provided by the embodiment of the utility model is used. The clamping member 1 on the gland side is installed on the valve stem 4 of the valve from the side of the packing gland away from the copper sleeve, and the clamping member 2 on the copper sleeve is installed on the valve stem 4 of the valve from the side of the copper sleeve away from the packing gland. Then, the two ends of the tensioning member 3 are respectively installed on the gland side clamping member 1 and the copper sleeve side clamping member 2. Then, the length of the tensioning member 3 is adjusted so that the tensioning member 3 applies tension to the gland side clamping member 1 and the copper sleeve side clamping member 2, thereby applying pressure to the packing tooth sleeve and the copper sleeve to further tighten the packing. It can be seen that this valve leakage pressure sealing device does not require the injection of plugging agent and does not cause any damage to the valve. A new effective sealing structure can be re-established at the leakage defect location without affecting the normal operation of the valve, thereby avoiding forced shutdown of the equipment unit and reducing economic losses.

[0045] The first clamping blocks 101 and the second clamping blocks 201 can be detachably connected in a variety of ways. In one embodiment of the present invention, for example, Figures 2 to 4 As shown, one of the mating surfaces of two adjacent first clamping blocks 101 is provided with a first dovetail tenon 102, and the other of the mating surfaces of two adjacent first clamping blocks 101 is provided with a first dovetail slot 103. The number of the first dovetail tenon 102 and the first dovetail slot 103 can be one or more, and the first dovetail tenon 102 and the first dovetail slot 103 cooperate to detachably connect the two adjacent first clamping blocks 101.

[0046] Specifically, Figures 2 to 4As shown, the gland side clamping member 1 includes two semicircular first clamping blocks 101, wherein a first dovetail tenon 102 is arranged on the mating surface of one of the first clamping blocks 101, and a first dovetail groove 103 is arranged on the mating surface of the other first clamping block 101, and the two first clamping blocks 101 are respectively provided with first assembly grooves for enclosing a first assembly hole 104. During installation, the two first clamping blocks 101 are matched with the valve stem 4 from both sides of the valve stem 4 through the first assembly grooves in an axially displaced manner along the valve stem 4, and then after the first dovetail tenon 102 is aligned with the first dovetail groove 103, the two first clamping blocks 101 are moved along the axial direction of the valve stem 4 so that the first dovetail tenon 102 is engaged with the first dovetail groove 103. This structure is also applicable to the case where the number of the first clamping blocks 101 is three, four or more.

[0047] like Figures 5 to 7 As shown, a second dovetail tenon 202 is provided on one of the mating surfaces of two adjacent second clamping blocks 201, and a second dovetail slot 203 is provided on the other mating surfaces of two adjacent first clamping blocks 101. The number of the second dovetail tenon 202 and the second dovetail slot 203 can be one or more, and the second dovetail tenon 202 and the second dovetail slot 203 cooperate to detachably connect the two adjacent first clamping blocks 101.

[0048] Specifically, Figures 5 to 7 As shown, the copper sleeve side clamping member 2 includes two semicircular second clamping blocks 201, wherein a second dovetail tenon 202 is arranged on the mating surface of one of the second clamping blocks 201, and a second dovetail groove 203 is arranged on the mating surface of the other second clamping block 201. The two second clamping blocks 201 are respectively provided with second assembly grooves for enclosing a second assembly hole 204. During installation, the two second clamping blocks 201 are matched with the valve stem 4 from both sides of the valve stem 4 through the second assembly grooves in an axially displaced manner along the valve stem 4, and then the second dovetail tenon 202 is aligned with the second dovetail groove 203, and then the two second clamping blocks 201 are moved along the axial direction of the valve stem 4 so that the second dovetail tenon 202 is engaged with the second dovetail groove 203. This structure is also applicable to the case where the number of the second clamping blocks 201 is three, four or more.

[0049] from Figures 2 to 7It can be seen that in this embodiment, the structures of the two first clamping blocks 101 are different, and the structures of the two second clamping blocks 201 are different. Therefore, during the manufacturing process, it is necessary to separately manufacture two first clamping blocks 101 and two second clamping blocks 201, which increases the cost. During the assembly process, it is also necessary to distinguish between the two clamping blocks with different structures so that they can be installed smoothly, which is inconvenient to operate. To avoid the above situation, in this embodiment of the utility model, one of the two mating surfaces at both ends of the first clamping block 101 is provided with a first dovetail tenon 102, and the other is provided with a first dovetail groove 103; one of the two mating surfaces at both ends of the second clamping block 201 is provided with a second dovetail tenon 202, and the other is provided with a second dovetail groove 203, so that each first clamping block 101 can have the same structure and each second clamping block 201 can have the same structure, which is convenient for manufacturing and installation.

[0050] It should be noted that the first dovetail slot 103 and the first dovetail tenon 102 can be simultaneously provided on the mating surface of the first clamping block 101 , and similarly, the second dovetail slot 203 and the second dovetail tenon 202 can be simultaneously provided on the mating surface of the second clamping block 201 .

[0051] It is foreseeable that bolts are usually provided on the packing gland. In order to avoid interference between the gland side clamping member 1 and the bolts, in the embodiment of the utility model, the gland side clamping member 1 is provided with a plurality of avoidance structures arranged at intervals along the circumferential direction. The avoidance structures are used to avoid the bolts of the packing gland of the valve. The avoidance structures include but are not limited to holes and grooves. Specifically, Figure 2 As shown, the avoidance structure is a U-shaped opening groove 106 , which axially penetrates the gland side clamping member 1 , and its opening is arranged at the edge of the gland side clamping member 1 and extends radially of the gland side clamping member 1 .

[0052] To further optimize the above technical solution, in an embodiment of the utility model, the clamping member 1 on the gland side is provided with a first packing structure coaxial with the first assembly hole 104, and the first packing structure is used to seal the gap between the clamping member 1 on the gland side and the valve stem 4 of the valve, and / or, the clamping member 2 on the copper sleeve side is provided with a second packing structure coaxial with the second assembly hole 204, and the second packing structure is used to seal the gap between the clamping member 2 on the copper sleeve side and the valve stem 4 of the valve. When in use, the first packing structure can be sealed with packing as needed.

[0053] Specifically, in a specific embodiment of the utility model, a first packing structure is only provided on the clamping member 1 on the gland side, and the first packing structure includes a packing groove 105 and a packing gland. The packing groove 105 is provided on a side surface of the clamping member 1 on the gland side away from the clamping member 2 on the copper sleeve side, and the packing groove 105 is coaxial with the first assembly hole 104. The packing gland is detachably connected to the clamping member 1 on the gland side to compress the packing in the packing groove 105.

[0054] like Figure 8 As shown, in the embodiment of the utility model, the tensioning member 3 includes a positive screw rod 301, a negative screw rod 302 and a sleeve 303, wherein one of the first mounting structure and the second mounting structure is connected to the first end of the positive screw rod 301, and one of the first mounting structure and the second mounting structure can be integrated with the first end of the positive screw rod 301, or one of the first mounting structure and the second mounting structure can be rotatably connected to the first end of the positive screw rod 301, or one of the first mounting structure and the second mounting structure can be detachably connected to the first end of the positive screw rod 301, and the other of the first mounting structure and the second mounting structure is connected to the first end of the negative screw rod 302, and the other of the first mounting structure and the second mounting structure can be integrated with the first end of the negative screw rod 302, or The other of the first mounting structure and the second mounting structure can be rotatably connected to the first end of the reverse screw rod 302, or the other of the first mounting structure and the second mounting structure can be detachably connected to the first end of the reverse screw rod 302, and the two ends of the sleeve 303 are respectively provided with a positive screw hole and a reverse screw hole, and the sleeve 303 is provided with an axially penetrating tubular cavity 3031, and the two ends of the tubular cavity 3031 are respectively formed with a positive screw hole and a reverse screw hole, the positive screw hole is threadedly connected to the second end of the positive screw rod 301, and the reverse screw hole is threadedly connected to the second end of the reverse screw rod 302. When in use, the positive screw rod 301 and the reverse screw rod 302 can be made to approach or move away from each other along the axial direction of the sleeve 303 by rotating the sleeve 303, thereby realizing the tightening of the clamping component 1 on the pressure cover side and the clamping component 2 on the copper sleeve side or the disassembly of the valve leakage pressure sealing device.

[0055] In a specific implementation scheme, the first mounting structure is a first threaded hole 107 threadedly matched with the positive screw rod 301, and the second mounting structure is a second threaded hole 205 threadedly matched with the negative screw rod 302. Of course, in other embodiments, since it is difficult to achieve complete alignment of the first mounting structure and the second mounting structure, the first mounting structure and the second mounting structure can be set as a universal ball head structure, or a universal ball head structure can be set on the positive screw rod 301 and the negative screw rod 302 to compensate for the axial misalignment of the first mounting structure and the second mounting structure for easy installation.

[0056] To further optimize the above technical solution, in order to facilitate the rotation of the sleeve 303, in an embodiment of the utility model, the outer peripheral tube wall of the sleeve 303 is provided with a rotation auxiliary structure, which is used to cooperate with a tool to drive the sleeve 303 to rotate.

[0057] Specifically, the rotation auxiliary structure includes a plurality of drive holes arranged at intervals along the circumference of the sleeve 303. The drive holes may be through holes or screw holes. When the drive holes are through holes, a drive rod may be inserted into the drive holes to increase the force arm, so as to facilitate the rotation of the sleeve 303. When the drive holes are screw holes, a bolt or a screw may be inserted into the drive holes, and then a sleeve may be used to cover the bolt or the screw to increase the force arm. Alternatively, the rotation auxiliary structure includes a plurality of drive rods arranged at intervals along the circumference of the sleeve 303, so that the force arm may be directly increased by the drive rod to drive the sleeve 303 to rotate, or a sleeve may be arranged outside the drive rod to increase the length and further extend the force arm. Alternatively, Figure 8 As shown, the rotation auxiliary structure includes an outer hexagonal structure 3032 disposed on the sleeve 303, so that the sleeve 303 is driven to rotate by the wrench and the outer hexagonal structure 3032. Figure 8 In the illustrated embodiment, both ends of the sleeve 303 are respectively provided with external hexagonal structures 3032 .

[0058] It should be noted that the various embodiments in this specification are described in a progressive manner, and each embodiment focuses on the differences from other embodiments. The same or similar parts between the various embodiments can be referenced to each other.

[0059] This article uses specific examples to illustrate the principles and implementation methods of the utility model. The above examples are only used to help understand the core idea of ​​the utility model. It should be pointed out that for ordinary technicians in this technical field, without departing from the principle of the utility model, the utility model can also be improved and modified, and these improvements and modifications also fall within the scope of protection of the claims of the utility model.

Claims

1. A valve leakage pressure sealing device, characterized in that: include: A gland side clamping member, the gland side clamping member is composed of a plurality of first clamping blocks detachably connected along the circumferential direction, the gland side clamping member is provided with a first assembly hole and a first mounting structure, the first assembly hole is used to clamp the valve stem of the valve, and a plurality of the first mounting structures are evenly distributed around the first assembly hole in the circumferential direction; A copper sleeve side clamping member, the copper sleeve side clamping member is composed of a plurality of second clamping blocks detachably connected along the circumferential direction, the copper sleeve side clamping member is provided with a second assembly hole and a second mounting structure, the second assembly hole is used to clamp the valve stem of the valve, and a plurality of the second mounting structures are evenly distributed around the second assembly hole in the circumferential direction; A tensioning member, two ends of which are respectively connected to the first mounting structure and the second mounting structure, and the length of the tensioning member is adjustable.

2. The valve leakage pressure sealing device according to claim 1, characterized in that: A first dovetail tenon is provided on one of the mating surfaces of two adjacent first clamping blocks, and a first dovetail slot is provided on the other of the mating surfaces of two adjacent first clamping blocks. The first dovetail tenon cooperates with the first dovetail slot to detachably connect the two adjacent first clamping blocks. A second dovetail tenon is provided on one of the mating surfaces of two adjacent second clamping blocks, and a second dovetail slot is provided on the other of the mating surfaces of two adjacent first clamping blocks. The second dovetail tenon cooperates with the second dovetail slot to detachably connect the two adjacent first clamping blocks.

3. The valve leakage pressure sealing device according to claim 2, characterized in that: One of the two matching surfaces at both ends of the first clamping block is provided with the first dovetail tenon, and the other is provided with the first dovetail slot; One of the two matching surfaces at both ends of the second clamping block is provided with the second dovetail tenon, and the other matching surface is provided with the second dovetail groove.

4. The valve leakage pressure sealing device according to any one of claims 1 to 3, characterized in that: The gland-side clamping component is provided with a plurality of avoidance structures arranged at intervals along the circumferential direction, and the avoidance structures are used to avoid the bolts of the packing gland of the valve.

5. The valve leakage pressure sealing device according to any one of claims 1 to 3, characterized in that: The clamping member on the gland side is provided with a first packing structure coaxial with the first assembly hole, and the first packing structure is used to seal the gap between the clamping member on the gland side and the valve stem of the valve, and / or, the clamping member on the copper sleeve side is provided with a second packing structure coaxial with the second assembly hole, and the second packing structure is used to seal the gap between the clamping member on the copper sleeve side and the valve stem of the valve.

6. The valve leakage pressure sealing device according to claim 5, characterized in that: The first packing structure includes a packing groove and a packing gland. The packing groove is arranged on a side surface of the gland side clamping member away from the copper sleeve side clamping member. The packing groove is coaxial with the first assembly hole. The packing gland is detachably connected to the gland side clamping member to compress the packing in the packing groove.

7. The valve leakage pressure sealing device according to any one of claims 1 to 3 and 6, characterized in that: The tensioning member comprises: A positive wire screw rod, one of the first mounting structure and the second mounting structure is connected to a first end of the positive wire screw rod; A reverse screw rod, the other of the first mounting structure and the second mounting structure being connected to a first end of the reverse screw rod; A sleeve, wherein two ends of the sleeve are respectively provided with a positive thread hole and a negative thread hole, the positive thread hole is threadedly connected to the second end of the positive thread rod, and the negative thread hole is threadedly connected to the second end of the negative thread rod.

8. The valve leakage pressure sealing device according to claim 7, characterized in that: The first mounting structure is a first threaded hole that is threadably matched with the positive threaded rod, and the second mounting structure is a second threaded hole that is threadably matched with the negative threaded rod.

9. The valve leakage pressure sealing device according to claim 7, characterized in that: The outer peripheral wall of the sleeve is provided with a rotation auxiliary structure, and the rotation auxiliary structure is used to cooperate with a tool to drive the sleeve to rotate.

10. The valve leakage pressure sealing device according to claim 9, characterized in that: The rotation auxiliary structure comprises a plurality of drive holes spaced apart along the circumference of the sleeve; or, the rotation auxiliary structure comprises a plurality of drive rods spaced apart along the circumference of the sleeve; or, the rotation auxiliary structure comprises an outer hexagonal structure provided on the sleeve.

Images