Novel injection valve assembly

Abstract

The utility model provides a novel injection valve assembly, and belongs to the technical field of pipeline control. The novel injection valve assembly comprises a valve body, a guide part and a columnar part, the valve body comprises a shell and a valve rod, the shell is provided with a water inlet cavity, a valve rod travel auxiliary cavity and a water outlet cavity, one part of the valve rod can slide and is installed in the valve rod travel auxiliary cavity in a sealed mode, and when the valve rod is located at the first position, the valve rod separates the water inlet cavity from the water outlet cavity in a sealed mode; when the valve rod is located at the second position, the water inlet cavity communicates with the water outlet cavity; the guiding part comprises a flange assembly and at least two shaft sleeves, a cavity with two through ends is formed in the middle of the flange assembly, the flange assembly surrounds the valve rod and is fixedly connected to the shell, the valve rod is sleeved with the two shaft sleeves in a spaced and sealed mode, the outer ring faces of the shaft sleeves abut against the wall face of the cavity in a sealed mode, and an annular groove is formed in the position, between the two shaft sleeves, of the wall face of the cavity. The annular groove is configured to store lubricating oil, and the flange assembly is provided with an oil hole communicating the inside and the outside of the cavity corresponding to the annular groove.

Description

Technical Field

[0001] The utility model relates to the technical field of pipeline control, in particular to a novel injection valve assembly. Background Art

[0002] At present, high-pressure water descaling technology has become an important part of controlling the quality of steel billets, and the descaling injection valve is a key equipment in the high-pressure water descaling technology system. The injection valve assembly, as the main structure of the descaling injection valve, is mainly used to control the on and off of the descaling high-pressure water. Its quality affects the production efficiency of the steel plant to a certain extent.

[0003] At present, the high-pressure water descaling system of steel mills generally uses turbid water as the medium. There are many impurities in the descaling water. At present, most steel mills use injection valves with plunger soft seals. The frequent up and down movement of the plunger causes the seal to be damaged due to friction, thus shortening the service life of the injection valve. Utility Model Content

[0004] The utility model aims to provide a novel injection valve assembly.

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

[0006] According to one aspect of the utility model, a new type of injection valve assembly is provided, including a valve body, a guide part and a columnar part, the valve body includes a shell and a valve stem, the shell is provided with a water inlet chamber, a valve stem stroke auxiliary chamber and a water outlet chamber, a part of the valve stem can be slidably and sealedly installed in the valve stem stroke auxiliary chamber, when the valve stem is in a first position, the valve stem seals and separates the water inlet chamber and the water outlet chamber, when the valve stem is in a second position, the water inlet chamber and the water outlet chamber are connected; the guide part includes a flange assembly and at least two sleeves, the middle part of the flange assembly is provided with a cavity with two through ends, the flange assembly is fixed to the shell around the valve stem, two sleeves are spaced apart and a sealing sleeve is arranged on the valve stem, and the outer annular surface of the sleeve is in sealing contact with the wall of the cavity, the wall of the cavity is provided with an annular groove between the two sleeves, the annular groove is configured to store lubricating oil, and the flange assembly is provided with an oil hole connecting the inside and outside of the cavity corresponding to the annular groove.

[0007] According to an embodiment of the utility model, it further comprises a columnar portion, which can be detachably installed in the oil hole to open and close the oil hole.

[0008] According to an embodiment of the utility model, the oil hole is located at the upper part of the annular groove.

[0009] According to one embodiment of the utility model, the flange assembly includes, from bottom to top, a two-way flange, a support, a cylinder body and a connecting flange, the two-way flange, the support, the cylinder body and the connecting flange all have the same center, the two-way flange is fixed to the shell body cocentrically with the valve stem, the lower end face of the support is sealingly abutted against the two-way flange, the lower end face of the cylinder body is sealingly abutted against the upper end face of the support, the lower end face of the connecting flange is sealingly abutted against the upper end face of the cylinder body, and the two-way flange, the support, the cylinder body and the connecting flange are all fixed by bolts, and the annular groove is located in the support.

[0010] According to one embodiment of the utility model, there are three sleeves, which are respectively recorded as the first sleeve, the second sleeve and the third sleeve. The first sleeve is located in the middle of the two-way flange, and the upper and lower ends of the first sleeve are respectively sealed against the two-way flange and the support. The second sleeve is located at the upper end of the support, and the upper and lower ends of the second sleeve are respectively sealed against the support and the cylinder body. The third sleeve is located at the lower end of the connecting flange, and the upper and lower ends of the third sleeve are respectively sealed against the connecting flange and the cylinder body.

[0011] According to one embodiment of the utility model, a first plunger is provided at the lower end of the valve stem. When the first plunger is in a first position, the first plunger seals and separates the water inlet chamber and the water outlet chamber. When the first plunger is in a second position, the water inlet chamber and the water outlet chamber are connected.

[0012] According to one embodiment of the utility model, it also includes a second plunger, and the cavity located at the position of the cylinder body is a balancing cavity. The second plunger is fixed to the valve stem corresponding to the cylinder body and is located in the balancing cavity. The second plunger surrounds the valve stem and can move up and down in the balancing cavity. There is a water channel in the valve stem, the lower water inlet of the water channel is connected to the water inlet cavity, and the upper water outlet of the water channel is connected to the balancing cavity. When the valve stem is in the first position, the water in the water inlet cavity applies upward pressure to the valve stem, and the water in the balancing cavity applies downward pressure to the second plunger.

[0013] According to an embodiment of the utility model, at least two first sealing rings are arranged between the second plunger and the valve stem.

[0014] According to one embodiment of the utility model, the inner annular surfaces of the first sleeve, the second sleeve and the third sleeve are each provided with at least one second sealing ring, and the outer annular surfaces of the first sleeve, the second sleeve and the third sleeve are each provided with at least one third sealing ring.

[0015] According to one embodiment of the utility model, it also includes a driving device and a mounting seat, the lower end of the mounting seat is fixedly connected to the upper end of the guide portion, the driving device is installed on the mounting seat, and the driving device is fixedly connected to the upper end of the valve stem to drive the valve stem to move up and down.

[0016] An embodiment of the present invention has the following advantages or beneficial effects:

[0017] The utility model discloses a new type of injection valve assembly, comprising a valve body, a guide part and a columnar part, the valve body comprises a shell and a valve stem, the shell is provided with a water inlet cavity, a valve stem stroke auxiliary cavity and a water outlet cavity, a part of the valve stem can be slidably and sealedly installed in the valve stem stroke auxiliary cavity, when the valve stem is in a first position, the valve stem seals and separates the water inlet cavity and the water outlet cavity, when the valve stem is in a second position, the water inlet cavity and the water outlet cavity are connected; the guide part comprises a flange assembly and at least two sleeves, the middle part of the flange assembly is provided with a cavity with two ends passing through, the flange assembly is fixed on the shell around the valve stem, two sleeves are arranged on the valve stem with sealing sleeves, and the outer annular surface of the sleeve is sealed against the wall of the cavity, the wall of the cavity is provided with an annular groove between the two sleeves, the annular groove is configured to store lubricating oil, and the flange assembly is provided with an oil hole communicating with the inside and outside of the cavity corresponding to the annular groove. Since the annular groove is configured to store lubricating oil, the friction between the valve stem and the sleeve is lubricated, the seal between the valve stem and the sleeve is avoided to be damaged, and the service life of the sleeve is improved. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The above and other features and advantages of the present invention will become more apparent by describing in detail example embodiments thereof with reference to the attached drawings.

[0019] Figure 1 is a cross-sectional view showing a novel injection valve assembly according to an exemplary embodiment.

[0020] Figure 2 yes Figure 1 A partial enlarged view of .

[0021] The reference numerals are described as follows:

[0022] 1. Valve body; 11. Shell; 111. Water inlet chamber; 112. Water outlet chamber; 12. Valve stem; 121. First plunger; 2. Guide portion; 21. Flange assembly; 211. Cavity; 212. Annular groove; 213. Oil hole; 214. Bidirectional flange; 215. Support; 216. Cylinder body; 217. Connecting flange; 22. Bushing; 221. First bushing; 222. Second bushing; 223. Third bushing; 3. Columnar portion; 4. Second plunger; 5. Driving device; 6. Mounting seat. DETAILED DESCRIPTION

[0023] Example embodiments will now be described more fully with reference to the accompanying drawings. However, example embodiments can be implemented in a variety of forms and should not be construed as limited to the embodiments set forth herein; rather, these embodiments are provided so that the present invention will be comprehensive and complete and fully convey the concepts of the example embodiments to those skilled in the art. The same reference numerals in the figures represent the same or similar structures, and thus their detailed description will be omitted.

[0024] The terms "a", "an", "the", and "said" are used to indicate the presence of one or more elements / components / etc.; the terms "comprising" and "having" are used to express an open-ended inclusive meaning and mean that additional elements / components / etc. may be present in addition to the listed elements / components / etc.

[0025] like Figure 1 , 2 As shown, a new type of injection valve assembly according to an embodiment of the utility model includes a valve body 1 and a guide part 2.

[0026] The valve body 1 includes a shell 11 and a valve stem 12. The shell 11 is provided with a water inlet chamber 111, a valve stem stroke auxiliary chamber and a water outlet chamber 112. A part of the valve stem 12 is slidably and sealingly installed in the valve stem stroke auxiliary chamber. When the valve stem 12 is in a first position, the valve stem 12 seals and separates the water inlet chamber 111 and the water outlet chamber 112. When the valve stem 12 is in a second position, the water inlet chamber 111 and the water outlet chamber 112 are connected.

[0027] The guide portion 2 is used to straighten the valve stem 12. Specifically, the guide portion 2 includes a flange assembly 21 and at least two sleeves 22. A cavity 211 with two through ends is opened in the middle of the flange assembly 21. The flange assembly 21 surrounds the valve stem 12 and is fixed to the housing 11. Two sleeves 22 are arranged on the valve stem 12 with sealing sleeves in between. The outer annular surface of the sleeve 22 is sealed against the wall of the cavity 211. An annular groove 212 is opened on the wall of the cavity 211 between the two sleeves 22. The annular groove 212 is configured to store lubricating oil to lubricate the friction between the valve stem 12 and the sleeve 22, avoid damaging the seal between the valve stem 12 and the sleeve 22, and improve the service life of the sleeve 22.

[0028] The flange assembly 21 is provided with an oil hole 213 corresponding to the annular groove 212 , which is connected with the inside and outside of the cavity 211 , and lubricating oil is injected into the annular groove 212 through the oil hole 213 .

[0029] When the seal of the lower sleeve 22 is damaged, water in the housing 11 will enter the annular groove 212 and flow out through the oil hole 213, which is easy to observe, so that the damage of the seal of the sleeve 22 can be grasped in time.

[0030] like Figure 1 , 2 As shown, in a preferred embodiment of the present utility model, it also includes a columnar portion 3 , which can be detachably installed in the oil hole 213 to open and close the oil hole 213 .

[0031] Preferably, the inner wall of the oil hole 213 is provided with an internal thread, and the columnar portion 3 is a bolt.

[0032] like Figure 1 , 2As shown, in a preferred embodiment of the present invention, the oil hole 213 is located at the upper portion of the annular groove 212 to prevent the lubricating oil from easily flowing out.

[0033] like Figure 1 , 2 As shown, in a preferred embodiment of the present utility model, the flange assembly 21 includes a bidirectional flange 214, a support 215, a cylinder body 216 and a connecting flange 217 from bottom to top.

[0034] The two-way flange 214 , the support 215 , the cylinder body 216 and the connecting flange 217 are all co-centered, and the two-way flange 214 is fixedly connected to the housing 11 co-centered with the valve stem 12 .

[0035] The lower end surface of the support 215 is sealed against the bidirectional flange 214 , the lower end surface of the cylinder body 216 is sealed against the upper end surface of the support 215 , and the lower end surface of the connecting flange 217 is sealed against the upper end surface of the cylinder body 216 .

[0036] The bidirectional flange 214 , the support 215 , the cylinder body 216 and the connecting flange 217 are all fixed by bolts, and the annular groove 212 is located in the support 215 .

[0037] For example, one end of the bolt passes through the connecting flange 217 , the cylinder body 216 , and the support 215 in sequence and is fixedly connected to the bidirectional flange 214 .

[0038] like Figure 1 , 2 As shown, in a preferred embodiment of the present invention, when there are three shaft sleeves 22, they are respectively recorded as a first shaft sleeve 221, a second shaft sleeve 222 and a third shaft sleeve 223.

[0039] The first sleeve 221 is located in the middle of the two-way flange 214, and the upper and lower ends of the first sleeve 221 are respectively sealed and abutted with the two-way flange 214 and the support 215. The second sleeve 222 is located at the upper end of the support 215, and the upper and lower ends of the second sleeve 222 are respectively sealed and abutted with the support 215 and the cylinder body 216. The third sleeve 223 is located at the lower end of the connecting flange 217, and the upper and lower ends of the third sleeve 223 are respectively sealed and abutted with the connecting flange 217 and the cylinder body 216. The annular groove 212 is located between the first sleeve 221 and the second sleeve 222.

[0040] Preferably, the bidirectional flange 214, the support 215, the cylinder body 216 and the connecting flange 217 are all provided with annular steps around the central hole, and the first sleeve 221, the second sleeve 222 and the third sleeve 223 are respectively located in the annular steps.

[0041] like Figure 1 , 2As shown, in a preferred embodiment of the utility model, a first plunger 121 is provided at the lower end of the valve stem 12. When the first plunger 121 is located at the first position, the first plunger 121 seals and separates the water inlet chamber 111 and the water outlet chamber 112. When the first plunger 121 is located at the second position, the water inlet chamber 111 and the water outlet chamber 112 are connected.

[0042] like Figure 1 , 2 As shown, in a preferred embodiment of the present invention, a second plunger 4 is also included, and the cavity 211 is located at the position of the cylinder 216 as a balance cavity.

[0043] The second plunger 4 corresponds to the cylinder body 216 which is fixed on the valve stem 12 and is located in the balancing chamber. The second plunger 4 surrounds the valve stem 12 and can move up and down in the balancing chamber. There is a water channel in the valve stem 12. The lower water inlet of the water channel is connected to the water inlet chamber 111, and the upper water outlet of the water channel is connected to the balancing chamber.

[0044] When the valve stem 12 is in the first position, the upper end of the second plunger 4 is located at the lower part of the balancing chamber, the water in the water inlet chamber 111 applies upward pressure to the valve stem 12, and the water in the balancing chamber applies downward pressure to the upper end of the second plunger 4, so as to reduce the impact on the driving device and extend the service life of the driving device.

[0045] like Figure 1 , 2 As shown, in a preferred embodiment of the utility model, at least two first sealing rings, preferably three first sealing rings are arranged between the second plunger 4 and the valve stem 12, and the three first sealing rings are respectively arranged at the upper, middle and lower positions to prevent water from entering the gap between them and destroying the balance performance.

[0046] like Figure 1 , 2 As shown, in a preferred embodiment of the utility model, the inner annular surfaces of the first sleeve 221, the second sleeve 222 and the third sleeve 223 are each provided with at least one second sealing ring, and the outer annular surfaces of the first sleeve 221, the second sleeve 222 and the third sleeve 223 are each provided with at least one third sealing ring to further improve the sealing performance.

[0047] like Figure 1 As shown, in a preferred embodiment of the utility model, it also includes a driving device 5 and a mounting seat 6, the lower end of the mounting seat 6 is fixedly connected to the upper end of the guide portion 2, the driving device 5 is installed on the mounting seat 6, and the driving device 5 is fixedly connected to the upper end of the valve stem 12 to drive the valve stem 12 to move up and down.

[0048] The driving device is a cylinder or a hydraulic cylinder. Preferably, the driving device is a cylinder, which has the effect of facilitating precise control of the stroke.

[0049] In the embodiments of the present invention, the term "multiple" refers to two or more than two, unless otherwise clearly defined. The terms "installation", "connection", "fixation" and the like should be understood in a broad sense. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection. For those of ordinary skill in the art, the specific meanings of the above terms in the embodiments of the present invention can be understood according to the specific circumstances.

[0050] In the description of the embodiments of the present invention, it is necessary to understand that the terms "upper" and "lower" etc. indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the embodiments of the present invention and simplifying the description, rather than indicating or implying that the device or unit referred to must have a specific direction, be constructed and operated in a specific orientation. Therefore, it cannot be understood as a limitation on the embodiments of the present invention.

[0051] In the description of this specification, the description of the terms "one embodiment", "a preferred embodiment", etc. means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the embodiment of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described can be combined in any one or more embodiments or examples in a suitable manner.

[0052] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A new type of injection valve assembly, characterized in that: include: A valve body (1) comprises a shell (11) and a valve stem (12); the shell (11) is provided with a water inlet chamber (111), a valve stem stroke auxiliary chamber and a water outlet chamber (112); a portion of the valve stem (12) is slidably and sealingly installed in the valve stem stroke auxiliary chamber; when the valve stem (12) is located at a first position, the valve stem (12) seals and separates the water inlet chamber (111) from the water outlet chamber (112); when the valve stem (12) is located at a second position, the water inlet chamber (111) and the water outlet chamber (112) are connected; The guide portion (2) comprises a flange component (21) and at least two shaft sleeves (22). A cavity (211) with two through-holes is provided in the middle of the flange component (21). The flange component (21) surrounds the valve stem (12) and is fixed to the housing (11). Two shaft sleeves (22) are provided on the valve stem (12) with sealing sleeves therebetween. The outer annular surface of the shaft sleeve (22) is in sealing contact with the wall surface of the cavity (211). An annular groove (212) is provided on the wall surface of the cavity (211) between the two shaft sleeves (22). The annular groove (212) is configured to store lubricating oil. The flange component (21) is provided with an oil hole (213) corresponding to the annular groove (212) and communicating with the inside and outside of the cavity (211).

2. The new injection valve assembly according to claim 1 is characterized in that: It also comprises a columnar portion (3), wherein the columnar portion (3) is detachably mounted in the oil hole (213) to open and close the oil hole (213).

3. The new injection valve assembly according to claim 1 is characterized in that: The oil hole (213) is located at the upper portion of the annular groove (212).

4. The new injection valve assembly according to claim 1 is characterized in that: The flange assembly (21) comprises, from bottom to top, a bidirectional flange (214), a support (215), a cylinder body (216) and a connecting flange (217); the bidirectional flange (214), the support (215), the cylinder body (216) and the connecting flange (217) are all co-centered; the bidirectional flange (214) and the valve stem (12) are co-centeredly fixed to the housing (11); the lower end surface of the support (215) is co-centered with the bidirectional flange (214). The flange (214) is in sealing contact, the lower end surface of the cylinder body (216) is in sealing contact with the upper end surface of the support (215), the lower end surface of the connecting flange (217) is in sealing contact with the upper end surface of the cylinder body (216), and the bidirectional flange (214), the support (215), the cylinder body (216) and the connecting flange (217) are all fixed by bolts, and the annular groove (212) is located in the support (215).

5. The new injection valve assembly according to claim 4 is characterized in that: The shaft sleeves (22) are three in number, which are respectively denoted as a first shaft sleeve (221), a second shaft sleeve (222) and a third shaft sleeve (223). The first shaft sleeve (221) is located in the middle of the bidirectional flange (214), and the upper and lower ends of the first shaft sleeve (221) are respectively sealed against the bidirectional flange (214) and the support (215). The second shaft sleeve (222) is located at the upper end of the support (215), and the upper and lower ends of the second shaft sleeve (222) are respectively sealed against the support (215) and the cylinder body (216). The third shaft sleeve (223) is located at the lower end of the connecting flange (217), and the upper and lower ends of the third shaft sleeve (223) are respectively sealed against the connecting flange (217) and the cylinder body (216). The annular groove (212) is located between the first shaft sleeve (221) and the second shaft sleeve (222).

6. The new injection valve assembly according to claim 5 is characterized in that: A first plunger (121) is provided at the lower end of the valve stem (12); when the first plunger (121) is located at a first position, the first plunger (121) seals and separates the water inlet chamber (111) and the water outlet chamber (112); when the first plunger (121) is located at a second position, the water inlet chamber (111) and the water outlet chamber (112) are connected.

7. The new injection valve assembly according to claim 5 is characterized in that: The valve body (211) further comprises a second plunger (4); the cavity (211) is located at the position of the cylinder body (216) as a balancing cavity; the second plunger (4) is fixedly connected to the valve stem (12) corresponding to the cylinder body (216) and is located in the balancing cavity; the second plunger (4) surrounds the valve stem (12), and the second plunger (4) can move up and down in the balancing cavity; the valve stem (12) has a water channel; the lower water inlet of the water channel is connected to the water inlet cavity (111), and the upper water outlet of the water channel is connected to the balancing cavity; when the valve stem (12) is located in the first position, the water in the water inlet cavity (111) applies an upward pressure to the valve stem (12), and the water in the balancing cavity applies a downward pressure to the second plunger (4).

8. The new injection valve assembly according to claim 7 is characterized in that: At least two first sealing rings are arranged between the second plunger (4) and the valve stem (12).

9. The new injection valve assembly according to claim 5 is characterized in that: The inner annular surfaces of the first shaft sleeve (221), the second shaft sleeve (222) and the third shaft sleeve (223) are each provided with at least one second sealing ring, and the outer annular surfaces of the first shaft sleeve (221), the second shaft sleeve (222) and the third shaft sleeve (223) are each provided with at least one third sealing ring.

10. The novel injection valve assembly according to any one of claims 1 to 9, characterized in that: It also includes a driving device (5) and a mounting seat (6), wherein the lower end of the mounting seat (6) is fixedly connected to the upper end of the guide portion (2), the driving device (5) is installed on the mounting seat (6), and the driving device (5) is fixedly connected to the upper end of the valve stem (12) to drive the valve stem (12) to move up and down.

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