Valve with stainless steel surfacing layer

Abstract

The utility model discloses a valve with a stainless steel surfacing layer, which comprises a valve body, a valve cover, a valve rod and a valve core, the valve body is provided with a valve cavity, two sides of the valve body are provided with an inlet and an outlet which are communicated with the valve cavity, the valve cavity of the valve body is provided with a valve seat for dividing the inlet and the outlet, and the valve body is provided with a valve cover connecting part; the valve cover is detachably mounted on the valve cover connecting part of the valve body; the valve rod is in threaded connection with the valve cover, penetrates through the valve cover and extends into the valve cavity; the valve element is fixedly installed at the lower end of the valve rod and located in a valve cavity of the valve body, and a stainless steel surfacing layer is arranged at the joint of the valve element and the valve rod. The valve rod is suitable for driving the valve element to make contact with a valve seat in the valve cavity in a matched mode through rotation action, and the communication state between the inlet and the outlet is controlled through cooperation of the valve element and the valve seat. The service life of the valve can be prolonged, and meanwhile visual inspection of the abrasion state is achieved.

Description

Technical Field

[0001] This utility model relates to a valve with a stainless steel weld overlay, belonging to the field of valve technology. Background Technology

[0002] Currently, valves are crucial control devices in industrial pipeline systems, widely used in industries such as petroleum, chemical, power, metallurgy, and wastewater treatment. Especially in wastewater treatment plants, valves need to handle wastewater containing suspended solids, corrosive substances, and abrasive particles for extended periods, operating in extremely harsh environments.

[0003] After searching the existing technology, it was found that Chinese patent CN214119002U discloses a valve with a stainless steel weld overlay. In this patent, a stainless steel weld overlay is welded on the inside of the valve body. However, it was found during use that the connection between the valve stem and the valve core is more prone to wear and corrosion, becoming a weak point for valve failure. Summary of the Invention

[0004] The technical problem to be solved by this utility model is to overcome the defects of the prior art and provide a valve with a stainless steel overlay layer, which can improve the service life of the valve and at the same time realize the visual inspection of wear condition.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is: a valve with a stainless steel overlay layer, comprising:

[0006] The valve body has a valve cavity, and the valve body has an inlet and an outlet on both sides that communicate with the valve cavity. The valve cavity of the valve body has a valve seat that divides the inlet and outlet. The valve body has a valve cover connection part.

[0007] A valve cover, which is detachably mounted on the valve cover connection portion of the valve body;

[0008] A valve stem, which is threaded onto the valve cover and extends through the valve cover into the valve cavity;

[0009] The valve core is fixedly installed at the lower end of the valve stem and located in the valve cavity of the valve body. The connection between the valve core and the valve stem is provided with a stainless steel weld overlay.

[0010] The valve stem is adapted to rotate to drive the valve core to engage with the valve seat in the valve cavity, thereby controlling the connection between the inlet and the outlet through the engagement of the valve core and the valve seat.

[0011] The valve seat and valve core have at least one annular wear depth indicator groove concentrically arranged on the contact surface of the valve seat.

[0012] Furthermore, a first conical flange is provided on the outer periphery of the top of the valve body;

[0013] The bottom outer periphery of the valve cover is provided with a second conical flange that mates with the first conical flange;

[0014] After the first tapered flange and the second tapered flange are joined together, they together form an annular boss on their outer periphery;

[0015] The valve having a stainless steel weld overlay also includes a connection mechanism adapted to connect the valve body and the valve cover, the connection mechanism comprising:

[0016] The split clamp has a groove on its inner circumference that matches the annular boss.

[0017] Fasteners, the fasteners being disposed on the split clamps;

[0018] The segmented clamp is adapted to be tightened by the fastener, so that the groove of the segmented clamp presses against the annular boss, thereby tightly fixing the first tapered flange and the second tapered flange together.

[0019] Furthermore, the annular boss formed by the docking of the first conical flange and the second conical flange is a V-shaped boss, and the groove on the inner circumference of the segmented clamp is a V-shaped groove that matches the V-shaped boss.

[0020] Furthermore, a specific structure for a segmented clamp is provided, wherein the segmented clamp consists of two symmetrically arranged semi-annular segments.

[0021] Furthermore, the fastener includes a connecting bolt disposed on the connecting lug of one of the semi-annular snap-fit ​​segments and a nut threaded onto the connecting bolt. The nut is adapted to engage with the connecting bolt by rotation, thereby pressing the connecting lugs of the two semi-annular snap-fit ​​segments together.

[0022] Furthermore, the nut is provided with a butterfly-shaped handle.

[0023] Furthermore, the valve with the stainless steel weld overlay also includes an operating handle, which is mounted on the valve stem.

[0024] By adopting the above technical solution, this utility model has the following beneficial effects:

[0025] In this invention, when the valve stem rotates to drive the valve core to contact the valve seat, the stainless steel weld overlay can resist the scouring and erosion of suspended solids and corrosive media in the sewage. At the same time, the annular wear depth indicator groove provides the operator with a visual indication of the wear status. When the sealing surface wears to the depth of the annular wear depth indicator groove, it can be visually detected and maintained, avoiding sealing failure caused by excessive wear.

[0026] By setting the first and second conical flanges to form a V-shaped boss, and using a split clamp and V-shaped groove matching structure, the valve body and valve cover can be quickly connected; the split clamp consists of two symmetrically arranged semi-annular clamps, which can improve the stability of the connection through the tightening action of connecting bolts and nuts; the butterfly handle on the outside of the nut facilitates manual operation.

[0027] In summary, this invention not only improves the wear resistance and corrosion resistance of valves under harsh working conditions, but also enables easy visualization of wear status, and improves the efficiency of valve installation and maintenance. It is particularly suitable for applications such as sewage treatment that require frequent maintenance and operate under harsh conditions. Attached Figure Description

[0028] Figure 1 This is a three-dimensional structural diagram of the valve with a stainless steel weld overlay layer according to the present invention.

[0029] Figure 2 This is a cross-sectional view of the valve with a stainless steel weld overlay of this utility model. Detailed Implementation

[0030] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0031] like Figure 1-2 As shown, a valve with a stainless steel weld overlay includes:

[0032] Valve body 1, valve body 1 is provided with valve cavity, valve body 1 has inlet and outlet on both sides that are connected to valve cavity, valve cavity of valve body 1 is provided with valve seat that divides inlet and outlet, valve body 1 is provided with valve cover connection part.

[0033] Valve cover 2, which is detachably mounted on the valve cover connection part of valve body 1;

[0034] Valve stem 3 is threaded onto valve cover 2 and extends through valve cover 2 into valve cavity;

[0035] Valve core 4 is fixedly installed at the lower end of valve stem 3 and located in the valve cavity of valve body 1. Stainless steel weld overlay layer 6 is provided at the connection between valve core 4 and valve stem 3.

[0036] The valve stem 3 is adapted to drive the valve core 4 to engage with the valve seat in the valve cavity through rotation, thereby controlling the connection between the inlet and outlet through the engagement of the valve core 4 and the valve seat.

[0037] Among them, an annular wear depth indicator groove 7 is provided on the contact surface between the valve seat and the valve core 4, which is concentrically arranged with the sealing surface of the valve seat.

[0038] In this embodiment, as Figure 1 As shown, when the valve stem 3 rotates to drive the valve core 4 to engage with the valve seat, the stainless steel weld overlay 6 can resist the scouring and erosion of suspended solids and corrosive media in the sewage. At the same time, the annular wear depth indicator groove 7 provides the operator with an intuitive view of the wear status. When the sealing surface wears to the depth of the annular wear depth indicator groove 7, it can be detected and maintained, avoiding sealing failure caused by excessive wear.

[0039] In addition, a packing seal is provided between the valve cover 2 and the valve stem 3 to prevent leakage of the medium along the gap between the valve stem 3 and the valve cover 2. The valve cover connection part of the valve body 1 has multiple bolt holes, and the valve cover 2 has corresponding through holes at the corresponding positions. The valve cover 2 can be fastened to the valve body 1 using bolts and nuts. A sealing gasket is provided between the valve body 1 and the valve cover 2. Flange connection structures are provided at both the inlet and outlet of the valve body 1. In this embodiment, the stainless steel overlay layer 6 at the connection between the valve core 4 and the valve stem 3 is manually welded using 304 stainless steel welding rods after the valve core 4 and valve stem 3 are installed. After the overlay is completed, it is ground to remove the surface oxide layer and burrs, ensuring the dimensional accuracy and surface finish of the valve core 4 and valve stem 3.

[0040] Specifically, such as Figure 1-2 As shown, a first conical flange 8 is provided on the outer periphery of the top of the valve body 1;

[0041] The bottom outer periphery of the valve cover 2 is provided with a second conical flange 9 that mates with the first conical flange 8;

[0042] After the first conical flange 8 and the second conical flange 9 are joined together, they together form an annular boss on their outer periphery;

[0043] The valve having a stainless steel weld overlay also includes a connection mechanism suitable for connecting the valve body 1 and the valve cover 2, the connection mechanism including:

[0044] The split clamp 21 has a groove on its inner circumference that matches the annular boss.

[0045] Fasteners are provided on the split clamp 21;

[0046] The segmented clamp 21 is suitable for tightening by fasteners, so that the groove of the segmented clamp 21 presses against the annular boss, thereby tightly fixing the first conical flange 8 and the second conical flange 9 together.

[0047] Specifically, such as Figure 1-2 As shown, the annular boss formed by the first conical flange 8 and the second conical flange 9 after docking is a V-shaped boss, and the groove on the inner circumference of the segmented clamp 21 is a V-shaped groove that matches the V-shaped boss.

[0048] Specifically, such as Figure 1-2As shown, the segmented clamp 21 consists of two symmetrically arranged semi-annular clamp segments.

[0049] Specifically, such as Figure 1-2 As shown, the fastener includes a connecting bolt 25 disposed on a connecting lug plate of one of the semi-annular snap-fit ​​segments and a nut threaded onto the connecting bolt 25. The nut is adapted to engage with the connecting bolt 25 by rotation, so that the connecting lug plates of the two semi-annular snap-fit ​​segments press against each other.

[0050] Specifically, such as Figure 1-2 As shown, the nut is provided with a butterfly handle 26.

[0051] In this embodiment, as Figure 1-2 As shown, during the installation and disassembly of the valve, the valve body 1 and valve cover 2 are first joined together via the first conical flange 8 and the second conical flange 9 to form a V-shaped annular boss. Then, the two semi-annular flaps of the split clamp 21 surround the V-shaped boss from both sides, causing the V-shaped groove on the inner circumference of the split clamp 21 to fit against the V-shaped boss. By rotating the nut, the connecting bolt 25 causes the connecting lugs of the two semi-annular flaps to gradually approach each other, and the split clamp 21 tightens and presses against the V-shaped boss, achieving a fixed connection between the valve body 1 and the valve cover 2. During disassembly, rotating the nut in the opposite direction separates the connecting lugs, and the split clamp 21 is then released, allowing the valve body 1 and valve cover 2 to be separated.

[0052] The butterfly handle 26 is located on the outside of the nut, allowing the operator to directly hold and rotate it without the need for wrenches or other tools. The operating handle 30 is mounted on the upper end of the valve stem 3. Rotating the operating handle 30 causes the valve stem 3 to rotate. The threaded structure of the valve stem 3 causes axial displacement during rotation, which in turn causes the valve core 4 to move up and down within the valve cavity, achieving contact or separation with the valve seat and controlling the opening and closing state of the valve.

[0053] In other embodiments, the number of segmented clamps 21 is not limited to two semi-annular segments; they can be configured as three or more segments depending on specific requirements. Fasteners can also be combinations of multiple connecting bolts 25 and nuts, distributed on connecting lugs at different locations.

[0054] Specifically, such as Figure 1-2 As shown, the valve with a stainless steel weld overlay also includes an operating handle 30, which is mounted on the valve stem 3.

[0055] In this embodiment, as Figure 1-2 As shown, the operating handle 30 is fixed to the upper end of the valve stem 3 by a bolt and nut connection. When the operator rotates the operating handle 30, the valve stem 3 rotates synchronously and moves axially within the valve cover 2 through the threaded structure, causing the valve core 4 to rise and fall within the valve cavity, thereby controlling the opening and closing state of the valve.

[0056] The specific embodiments described above further illustrate the technical problems, technical solutions, and beneficial effects of this utility model. It should be understood that the above descriptions are merely specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A valve having a stainless steel weld overlay, characterized in that, include: The valve body (1) is provided with a valve cavity. The valve body (1) has an inlet and an outlet connected to the valve cavity on both sides. The valve cavity of the valve body (1) is provided with a valve seat that divides the inlet and outlet. The valve body (1) is provided with a valve cover connection part. Valve cover (2), which is detachably mounted on the valve cover connection part of the valve body (1); A valve stem (3) is threaded onto the valve cover (2) and extends through the valve cover (2) into the valve cavity; The valve core (4) is fixedly installed at the lower end of the valve stem (3) and located in the valve cavity of the valve body (1). The connection between the valve core (4) and the valve stem (3) is provided with a stainless steel weld overlay (6). The valve stem (3) is adapted to drive the valve core (4) to engage with the valve seat in the valve cavity through rotation, thereby controlling the communication state between the inlet and outlet through the engagement of the valve core (4) and the valve seat; Among them, at least one annular wear depth indicator groove (7) is provided on the contact surface between the valve seat and the valve core (4) and is concentrically arranged with the sealing surface of the valve seat.

2. The valve with a stainless steel weld overlay as claimed in claim 1, characterized in that, The valve body (1) has a first conical flange (8) on the outer periphery of its top; The valve cover (2) has a second conical flange (9) on its bottom outer periphery that mates with the first conical flange (8); After the first conical flange (8) and the second conical flange (9) are joined together, they together form an annular boss on their outer periphery; It also includes a connecting mechanism suitable for connecting the valve body (1) and the valve cover (2), the connecting mechanism comprising: The split clamp (21) has a groove on its inner circumference that matches the annular boss. Fasteners, the fasteners being disposed on the split clamp (21); The segmented clamp (21) is adapted to be tightened by the fastener, so that the groove of the segmented clamp (21) presses against the annular boss, thereby tightly fixing the first conical flange (8) and the second conical flange (9) together.

3. The valve with a stainless steel weld overlay as described in claim 2, characterized in that, The annular boss formed by the first conical flange (8) and the second conical flange (9) is a V-shaped boss, and the groove on the inner circumference of the segmented clamp (21) is a V-shaped groove that matches the V-shaped boss.

4. The valve with a stainless steel weld overlay as described in claim 2, characterized in that, The segmented clamp (21) consists of two symmetrically arranged semi-annular clamp segments.

5. The valve with a stainless steel weld overlay according to claim 4, characterized in that, The fastener includes a connecting bolt (25) disposed on a connecting lug of one of the semi-annular snap-fit ​​segments and a nut threaded onto the connecting bolt (25), the nut being adapted to engage with the connecting bolt (25) by rotation, thereby pressing the connecting lugs of the two semi-annular snap-fit ​​segments together.

6. The valve with a stainless steel weld overlay according to claim 5, characterized in that, The nut is provided with a butterfly handle (26).

7. The valve with a stainless steel weld overlay according to claim 1, characterized in that, It also includes an operating handle (30) mounted on the valve stem (3).

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