Novel low-temperature lengthened corrugated pipe sealing stop valve

Abstract

The utility model discloses a novel low-temperature lengthened corrugated pipe sealing stop valve. One end of a connecting pipe in the length direction is welded to a valve body and is communicated to a window; the support is welded to the other end of the connecting pipe in the length direction. The valve rod assembly is installed on the support and comprises a valve rod movably arranged corresponding to the valve seat, and a valve clack matched with the valve seat in an opening and closing mode is arranged at the inner end of the valve rod in the length direction. The guide block is clamped between the connecting pipe and the window, and the valve rod penetrates through the guide block and is slidably arranged; according to the novel low-temperature lengthened corrugated pipe sealing stop valve, the effect of a valve cover is achieved through the barrel-shaped connecting pipe, independent manufacturing of the valve cover is omitted, the connecting pipe plays a role in connection between the valve body and the support, the barrel-shaped connecting pipe has the advantage that the size structure is easy to adjust, meanwhile, the two ends of the connecting pipe are fixed in a welded mode, and the sealing effect is good. Therefore, the structure is simple, the installation convenience is high, and the sealing effect meets the requirement. And the guide block is matched with the inner wall of the connecting pipe, so that the stroke of the valve rod is accurately limited.

Description

Technical Field

[0001] The utility model relates to the field of bellows stop valves, in particular to a low-temperature lengthened novel bellows sealed stop valve. Background Art

[0002] The low temperature extended stop valve, with its unique design and excellent performance, plays an irreplaceable role in the oil, natural gas and other industrial fields. The valve not only has excellent low temperature resistance, but also has the advantages of easy operation, good sealing performance, small fluid resistance and long service life, so that it can work stably and efficiently in low temperature environment.

[0003] The low temperature resistance of the low temperature extended stop valve is a highlight. Made of advanced low temperature materials, it ensures that the valve can maintain good working performance at extremely low temperatures, effectively avoiding performance degradation or failure caused by temperature changes. The extended design of the valve makes operation more convenient. By lengthening the valve stem, operators can more conveniently perform switch operations, improving work efficiency. At the same time, the precise adjustment mechanism makes the valve opening adjustable to meet different process requirements.

[0004] However, the valve cover of the extended valve needs to be specially designed and the mold needs to be designed separately, which is disadvantageous to the overall cost and design flexibility. In addition, the connection structure between the valve cover and the valve body also has the risk of failure in a low temperature environment. Utility Model Content

[0005] The main purpose of the utility model is to provide a new low-temperature extended bellows sealed stop valve, aiming to solve the problem of extended valves and separately designing a valve cover mold, which is disadvantageous to the overall cost and design flexibility, and the connection structure between the valve cover and the valve body also has the risk of failure in a low-temperature environment.

[0006] In order to achieve the above object, the utility model provides a low temperature lengthened new bellows sealed stop valve, comprising:

[0007] A valve body having a flow channel running through it, a valve seat being arranged in the middle of the flow channel in the length direction, and a window corresponding to the valve seat being opened on the outer wall of the valve body;

[0008] A connecting pipe is in a cylindrical shape, one end of which in the length direction is welded to the valve body and connected to the window;

[0009] A bracket, welded to the other end of the pipe in the length direction;

[0010] A valve stem assembly is mounted on the bracket, the valve stem assembly comprises a valve stem movably arranged corresponding to the valve seat, and a valve flap cooperating with the valve seat is arranged at the inner end of the valve stem in the length direction;

[0011] A guide block is clamped between the connecting pipe and the window, and the valve stem passes through the guide block and is slidably arranged;

[0012] The bellows has two ends in the length direction respectively connected to the valve stem and the bracket.

[0013] Furthermore, a sealant is coated on the connection between the valve seat and the connecting pipe.

[0014] Furthermore, a sealant is coated on the connection between the connecting pipe and the bracket.

[0015] Furthermore, a spiral wound gasket is clamped between the connecting end surface of the connecting pipe and the valve body.

[0016] Furthermore, the spiral wound gasket is made of graphite.

[0017] Furthermore, the connecting pipe is a flange connection structure in the length direction.

[0018] Furthermore, the connecting pipe includes a plurality of sub-pipes, and the sub-pipes are connected to each other through two flange rings, and the flange rings are welded to the sub-pipes.

[0019] Furthermore, the number of the sub-pipes is two, and the number of the flange rings is two.

[0020] Furthermore, the material of the connecting pipe is consistent with that of the guide block.

[0021] Furthermore, a sealing gasket is clamped between the guide block and the window.

[0022] The low-temperature extended new bellows sealed stop valve provided by the utility model provides the effect of a valve cover through a cylindrical connecting pipe, eliminating the need for separate production of the valve cover. The connecting pipe plays a connecting role between the valve body and the bracket, and the cylindrical connecting pipe has the advantage of simple size and structure adjustment. At the same time, both ends of the connecting pipe are welded and fixed, so while the structure is simple, the installation convenience is high, and the sealing effect also meets the requirements; through the cooperation of the guide block and the inner wall of the connecting pipe, accurate limitation of the stroke of the valve stem is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a cross-sectional schematic diagram of a low-temperature lengthened novel bellows-sealed stop valve according to an embodiment of the utility model;

[0024] Figure 2 yes Figure 1 Middle partial enlarged picture;

[0025] Figure 3 It is a cross-sectional schematic diagram of a connecting pipe in a low-temperature lengthened novel bellows-sealed stop valve according to an embodiment of the utility model;

[0026] Figure 4 The utility model is a cross-sectional schematic diagram of a connecting pipe in a low-temperature lengthened novel bellows sealed stop valve according to an embodiment of the utility model.

[0027] The realization of the purpose, functional features and advantages of the utility model will be further explained in conjunction with embodiments and with reference to the accompanying drawings. DETAILED DESCRIPTION

[0028] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0029] Those skilled in the art will appreciate that, unless expressly stated, the singular forms "one", "said", "above", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present utility model refers to the presence of the features, integers, steps, operations, elements, units, modules, and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, units, modules, components, and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be intermediate elements. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0030] Those skilled in the art will understand that, unless otherwise defined, all terms (including technical terms and scientific terms) used herein have the same meaning as the general understanding of ordinary technicians in the field to which the utility model belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have the same meaning as the meaning in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0031] Reference Figures 1 to 4 In one embodiment of the utility model, a low-temperature lengthened new bellows sealed stop valve comprises:

[0032] The valve body 100 has a flow channel 110 passing through it. A valve seat 120 is disposed in the middle of the flow channel 110 in the longitudinal direction. A window 130 corresponding to the valve seat 120 is provided on the outer wall of the valve body 100.

[0033] The connecting pipe 200 is in a cylindrical shape, and one end of the connecting pipe 200 in the length direction is welded to the valve body 100 and connected to the window 130.

[0034] The bracket 300 is welded to the other end of the pipe 200 in the length direction;

[0035] A valve stem assembly 400 is mounted on the bracket 300. The valve stem assembly 400 includes a valve stem 410 movably arranged corresponding to the valve seat 120. The inner end of the valve stem 410 in the length direction is provided with a valve flap 420 that cooperates with the valve seat 120.

[0036] A guide block 500 is clamped between the pipe 200 and the window 130, and the valve stem 410 is slidably disposed through the guide block 500;

[0037] The bellows 600 has two ends in the length direction connected to the valve stem 410 and the bracket 300 respectively.

[0038] In the prior art, the valve cover of the extended valve needs to be specially designed and the mold needs to be designed separately, which is disadvantageous to the overall cost and design flexibility; and the connection structure between the valve cover and the valve body also has the risk of failure in a low temperature environment.

[0039] In the present invention, a flow channel 110 is passed through the valve body 100, and a valve seat 120 is provided in the middle of the length direction of the flow channel 110. A window 130 corresponding to the valve seat 120 is provided on the outer wall of the valve body 100. In the general prior art, a valve cover seat for mounting a valve cover is provided on the outer wall of the valve body 100, but in the present invention, a window structure is provided.

[0040] The connecting pipe 200 is cylindrical in shape. One end of the connecting pipe 200 in the length direction is welded to the valve body 100 and communicates with the window 130 .

[0041] The bracket 300 is welded to the other end of the pipe 200 in the length direction. The bracket 300 is used to fix the subsequent valve stem assembly 400. The pipe 200 plays a connecting role between the valve body 100 and the bracket 300. The cylindrical pipe 200 has the advantage of simple size and structure adjustment. At the same time, both ends of the pipe 200 are welded and fixed, so the structure is simple, the installation convenience is high, and the sealing effect also meets the requirements.

[0042] The valve stem assembly 400 is mounted on the bracket 300. The valve stem assembly 400 includes a valve stem 410 movably arranged corresponding to the valve seat 120. The inner end of the valve stem 410 in the length direction is provided with a valve flap 420 that cooperates with the valve seat 120. The main working structure of the valve stem assembly 400 is consistent with the existing design, but a guide block 500 is introduced. Through the cooperation between the guide block 500 and the inner wall of the pipe 200, the stroke of the valve stem 410 is accurately limited.

[0043] The guide block 500 is clamped between the pipe 200 and the window 130. The valve stem 410 is slidably arranged through the guide block 500. The guide block 500 limits the movement process of the valve stem 410 accurately, so that the working effect of the valve stem 410 is better.

[0044] The two ends of the bellows 600 in the length direction are respectively connected to the valve stem 410 and the bracket 300. The bellows 600 provides a sealing effect at the valve stem 410.

[0045] In summary, the effect of a valve cover is provided by the cylindrical connecting pipe 200, which eliminates the need for separate production of the valve cover. The connecting pipe 200 serves as a connection between the valve body 100 and the bracket 300, and the cylindrical connecting pipe 200 has the advantage of simple size and structure adjustment. At the same time, both ends of the connecting pipe 200 are welded and fixed, so the structure is simple, the installation is convenient, and the sealing effect meets the requirements. Through the cooperation of the guide block 500 and the inner wall of the connecting pipe 200, accurate limitation of the stroke of the valve stem 410 is achieved.

[0046] In one embodiment, a sealant is coated on the connection between the valve seat 120 and the connecting pipe 200 .

[0047] In this embodiment, considering the presence of gaps in welding, there is a risk of rust under certain circumstances. A sealant is provided at the connection between the connecting pipe 200 and the valve seat 120, and sealing protection is achieved by the sealant. As a result, the environment in the area between the connecting pipe 200 and the valve seat 120 is affected by the outside world, and the possibility of negative effects such as rust is reduced. The sealant coating can be performed after the welding is completed and the temperature of the welding part returns to normal temperature. The material selection of the sealant can also be diverse, with specific reference to its bonding and weather resistance.

[0048] In one embodiment, the connection between the connecting pipe 200 and the bracket 300 is coated with sealant.

[0049] Similar to the above-mentioned embodiment, in this embodiment, considering the existence of gaps in welding, there is a risk of rust in certain circumstances. A sealant is provided at the connection between the pipe 200 and the bracket 300, and a sealing protection is achieved by the sealant. Thus, the possibility of negative effects such as rust, etc., generated by the environment in the area between the pipe 200 and the bracket 300 being affected by the outside world, is reduced.

[0050] Reference Figures 1 to 2 In one embodiment, a spiral wound gasket 700 is clamped between the connecting end faces of the connecting pipe 200 and the valve body 100 .

[0051] In this embodiment, in order to improve the sealing effect between the pipe 200 and the valve body 100, in addition to the welding structure, a spiral wound gasket 700 is provided between the connecting end faces of the two. The sealing effect is increased by the elastic effect of the spiral wound gasket 700. It should be noted that the spiral wound gasket 700 should have a relatively superior high temperature resistance effect, otherwise there is a risk of being corroded during the welding process. The material selection of the spiral wound gasket 700 can be alloy steel or high temperature resistant inorganic materials.

[0052] In one embodiment, the spiral wound gasket 700 is made of graphite.

[0053] In this embodiment, the spiral wound gasket 700 made of graphite material can achieve a good sealing effect, and the processing technology and construction technology are also relatively mature. Specifically, before the welding process, the spiral wound gasket 700 can be arranged between the end surface of the pipe 200 and the valve body 100. Specifically, the spiral wound gasket 700 can be made of graphite material, so that the integrity of the material can be maintained during the welding process.

[0054] Reference Figure 3 In one embodiment, the connecting pipe 200 is a flange connection structure in the length direction.

[0055] In this embodiment, considering that the length of the pipe 200 is relatively long in some cases, if the pipe 200 is an integrated structure, it will be a challenge to the accuracy and difficulty of processing. Therefore, the pipe 200 is set as a connection structure, which is specifically realized by flange connection. This allows the length of the pipe 200 to be easily increased under the premise of simple connection.

[0056] Reference Figure 4 In one embodiment, the connecting pipe 200 includes a plurality of sub-pipes 210 , and the sub-pipes 210 are connected by two flange rings 220 , and the flange rings 220 are welded to the sub-pipes 210 .

[0057] Considering that the pipe 200 is installed by welding in the present invention, in this embodiment, the flange ring 220 on the sub-pipe 210 is also installed by welding, which is smooth and convenient for the installation process. For example, at the construction site, the flange ring 220 is first welded to the sub-pipe 210 to complete the production of the entire pipe 200, and then the entire pipe 200 is welded to the valve body 100.

[0058] In one embodiment, the number of the sub-pipes 210 is two, and the number of the flange rings 220 is two.

[0059] In this embodiment, a suitable number of sub-pipes 210 and flange rings 220 are provided. Specifically, during the installation process, first, the flange ring 220 is welded to one end of the sub-pipe 210 in the length direction to form a welded structure, and then the two flange rings 220 are used to connect the two welded structures.

[0060] In one embodiment, the connecting pipe 200 and the guide block 500 are made of the same material.

[0061] The guide block 500 is introduced because the structure of the pipe 200 is simpler than that of the traditional valve cover structure, but loses the limiting and guiding function on the valve stem 410. In this embodiment, the materials of the pipe 200 and the guide block 500 are made uniform, so that at different temperatures, the contraction and expansion of the two can be approximately synchronized, and the size matching effect between the two is better, the position guiding effect of the guide block 500 is better, and the movement of the valve stem 410 in its length direction is more accurate.

[0062] Reference Figures 1 to 2 In one embodiment, a sealing gasket 800 is clamped between the guide block 500 and the window 130 .

[0063] In this embodiment, the presence of the sealing gasket 800 reduces the possibility of contact between the guide block 500 and the fluid, thereby ensuring the operation of the guide block 500.

[0064] In summary, the low-temperature extended new bellows sealed stop valve provided by the utility model provides the effect of a valve cover through the cylindrical connecting pipe 200, eliminating the need for separate production of the valve cover. The connecting pipe 200 serves as a connection between the valve body 100 and the bracket 300, and the cylindrical connecting pipe 200 has the advantage of simple size and structure adjustment. At the same time, both ends of the connecting pipe 200 are welded and fixed, so the structure is simple, the installation convenience is high, and the sealing effect also meets the requirements; through the cooperation of the guide block 500 and the inner wall of the connecting pipe 200, accurate limitation of the stroke of the valve stem 410 is achieved.

[0065] The above description is only a preferred embodiment of the present invention, and does not limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made by using the contents of the specification and drawings of the present invention, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A new type of low temperature extended bellows sealed stop valve, characterized in that: include: A valve body (100) having a flow channel (110) passing through it, a valve seat (120) being provided in the middle of the flow channel (110) in the longitudinal direction, and a window (130) corresponding to the valve seat (120) being provided on the outer wall of the valve body (100); A connecting pipe (200) is in a cylindrical shape, and one end of the connecting pipe (200) in the length direction is welded to the valve body (100) and connected to the window (130); A bracket (300) is welded to the other end of the pipe (200) in the length direction; A valve stem assembly (400) is mounted on the bracket (300), the valve stem assembly (400) comprising a valve stem (410) movably arranged corresponding to the valve seat (120), and a valve flap (420) is arranged at the inner end of the valve stem (410) in the length direction and is engaged with the valve seat (120); A guide block (500) is clamped between the connecting pipe (200) and the window (130), and the valve stem (410) is slidably disposed through the guide block (500); The bellows (600) has two ends in the length direction connected to the valve stem (410) and the bracket (300) respectively.

2. The low-temperature extended new bellows sealed stop valve according to claim 1 is characterized in that: The connection between the valve seat (120) and the connecting pipe (200) is coated with sealant.

3. The low-temperature extended new bellows sealed stop valve according to claim 2 is characterized in that: The connection between the connecting pipe (200) and the bracket (300) is coated with sealant.

4. The low-temperature extended new bellows sealed stop valve according to claim 1 is characterized in that: A spiral wound gasket (700) is clamped between the connecting end surfaces of the connecting pipe (200) and the valve body (100).

5. The low-temperature lengthened new bellows sealed stop valve according to claim 4 is characterized in that: The spiral wound gasket (700) is made of graphite.

6. The low-temperature extended new bellows sealed stop valve according to any one of claims 1 to 5, characterized in that: The connecting pipe (200) is a flange connection structure in the length direction.

7. The low-temperature extended new bellows sealed stop valve according to claim 6 is characterized in that: The connecting pipe (200) comprises a plurality of sub-pipes (210), the sub-pipes (210) are connected to each other via two flange rings (220), and the flange rings (220) are welded to the sub-pipes (210).

8. The low-temperature lengthened new bellows sealed stop valve according to claim 7 is characterized in that: The number of the sub-pipes (210) is two, and the number of the flange rings (220) is two.

9. The low-temperature lengthened new bellows sealed stop valve according to any one of claims 1 to 5, characterized in that: The material of the connecting pipe (200) is consistent with that of the guide block (500).

10. The low-temperature lengthened new bellows sealed stop valve according to any one of claims 1 to 5, characterized in that: A sealing gasket (800) is clamped between the guide block (500) and the window (130).

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