High-temperature-resistant and high-pressure-resistant self-operated corrugated pipe type pressure regulating valve

Abstract

The utility model discloses a self-operated corrugated pipe type pressure regulating valve resistant to high temperature and high pressure. The self-operated corrugated pipe type pressure regulating valve comprises a valve body, a valve deck installed on the valve body, a valve rod penetrating through the valve deck to be installed in the valve body and a valve element arranged on the valve rod. The check valve is characterized in that a middle valve cover is arranged between the valve body and the valve cover; the middle valve cover is internally sleeved on the valve rod, one end of the middle valve cover is fixed between the valve cover and the middle valve cover, and the other end of the middle valve cover is fixed on a corrugated pipe assembly between the valve body and the middle valve cover; the corrugated pipe assembly comprises a corrugated pipe base, a corrugated pipe upper cover, a corrugated pipe fitting detachably inserted between the middle valve covers and a fixing piece for fixing the corrugated pipe fitting. According to the utility model, one end of the corrugated pipe assembly is fixed between the middle valve cover and the valve cover, and the other end of the corrugated pipe assembly is fixed between the middle valve cover and the valve body, so that the corrugated pipe assembly is convenient to mount and replace in the later period, and the mounting convenience is improved.

Description

Technical Field

[0001] This utility model relates to the field of regulating valve technology, specifically to a high-temperature and high-pressure resistant self-operated bellows-type pressure regulating valve. Background Technology

[0002] Self-operated control valves, also known as self-pressurized control valves, are valves that rely on the pressure and temperature of the medium flowing through the valve as their energy source to operate automatically. They do not require an external power supply or secondary instruments. To prevent medium leakage, self-operated control valves use a double-layer seal achieved through packing and bellows. However, in existing technologies, the bellows assembly is typically welded to the valve stem. This makes replacement inconvenient and adds welding steps to the installation process, increasing assembly time. Therefore, a high-temperature and high-pressure resistant self-operated bellows-type pressure regulating valve is proposed, which facilitates bellows assembly installation and replacement. Summary of the Invention

[0003] The purpose of this invention is to solve the above problems by proposing a high-temperature and high-pressure resistant self-operated bellows-type pressure regulating valve.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-temperature and high-pressure resistant self-operated bellows-type pressure regulating valve, comprising a valve body, a valve cover mounted on the valve body, a valve stem installed inside the valve body through the valve cover, and a valve core disposed on the valve stem; characterized in that an intermediate valve cover is installed between the valve body and the valve cover; the intermediate valve cover is fitted inside the valve stem and fixed at one end between the valve cover and the intermediate valve cover, and the other end is fixed between the valve body and the intermediate valve cover in a bellows assembly; the bellows assembly includes a bellows base and a bellows top cover, a bellows fitting detachably inserted between the intermediate valve covers, and a fixing member for fixing the bellows fitting.

[0005] Preferably, both the corrugated pipe base and the corrugated pipe cover are provided with insertion slots to facilitate the insertion of corrugated pipe fittings; a sealing ring is installed in the insertion slot.

[0006] Preferably, the corrugated pipe fitting is provided with an insertion boss that matches the insertion slot.

[0007] Preferably, the valve body is also equipped with a valve seat that is compatible with the valve core.

[0008] Preferably, the valve core is also provided with several sealing elements that improve the sealing performance between the valve core and the valve seat and are resistant to high temperature and high pressure.

[0009] Preferably, the sealing element can be a flexible graphite or metal sealing ring.

[0010] Preferably, packing is also installed between the valve stem and the valve cover; a packing gland fixed to the valve cover is installed on the packing.

[0011] The beneficial effects of this utility model are: by fixing one end of the bellows assembly between the intermediate valve cover and the valve cover, and fixing the other end between the intermediate valve cover and the valve body, it is convenient to install the bellows assembly and to replace it later, thus improving the convenience of installation.

[0012] The corrugated pipe fitting is inserted into the corrugated pipe base and the corrugated pipe cover at both ends, and then fixed with fasteners, which facilitates the installation of the corrugated pipe fitting. Attached Figure Description

[0013] Figure 1 This is a schematic diagram of the structure of this utility model.

[0014] Figure 2 This is a utility model Figure 1 A magnified view of a portion of point A in the middle.

[0015] Figure 3 This is a utility model Figure 1 A magnified view of a section at point B.

[0016] Legend: 1. Valve body; 2. Valve cover; 3. Valve stem; 301. Valve core; 4. Intermediate valve cover; 5. Bellows assembly; 501. Bellows base; 502. Bellows top cover; 503. Bellows fitting; 504. Fixing component; 505. Cartridge groove; 506. Sealing ring; 507. Cartridge boss; 6. Valve seat; 7. Sealing component; 8. Packing; 801. Packing gland. Detailed Implementation

[0017] The following description, in conjunction with the accompanying drawings, further illustrates the high-temperature and high-pressure resistant self-operated bellows-type pressure regulating valve of this utility model.

[0018] It should be noted that all directional indications in the embodiments of the present invention, such as up, down, left, right, front, back, etc., are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indication will also change accordingly.

[0019] See appendix Figure 1-3As shown in this embodiment, a high-temperature and high-pressure resistant self-operated bellows-type pressure regulating valve includes a valve body 1, a valve cover 2 mounted on the valve body 1, a valve stem 3 passing through the valve cover 2 and mounted inside the valve body 1, and a valve core 301 disposed on the valve stem 3. Its characteristic is that an intermediate valve cover 4 is installed between the valve body 1 and the valve cover 2; the intermediate valve cover 4 is fitted inside the valve stem 3 and fixed at one end between the valve cover 2 and the intermediate valve cover 4, and the other end is fixed between the valve body 1 and the intermediate valve cover 4, forming a bellows assembly 5; the bellows assembly 5 includes a bellows base 501 and a bellows top cover 502, a bellows fitting 503 detachably inserted between the intermediate valve covers 4, and a mechanism for fixing the bellows fitting 503. The bellows base 501 and bellows cover 502 are sealed with seals between the valve cover 2 and the intermediate valve cover 4, and between the valve body 1 and the intermediate valve cover 4. By fixing one end of the bellows assembly 5 between the intermediate valve cover 4 and the valve cover 2, and the other end between the intermediate valve cover 4 and the valve body 1, the installation of the bellows assembly 5 is facilitated and the replacement is made easier, thus improving the ease of installation. The bellows fitting 503 is installed by inserting both ends into the bellows base 501 and the bellows cover 502, and is fixed with the bellows fitting 504, thus facilitating the installation of the bellows fitting 503. The fixing part 504 can be a screw.

[0020] See appendix Figure 2 As shown, both the corrugated pipe base 501 and the corrugated pipe cover 502 are provided with insertion slots 505 to facilitate the insertion of the corrugated pipe fitting 503; a sealing ring 506 is installed in the insertion slot 505; the corrugated pipe fitting 503 is provided with an insertion boss 507 that matches the insertion slot 505; by inserting the insertion boss 507 on the corrugated pipe fitting 503 into the insertion slots 505 on the corrugated pipe base 501 and the corrugated pipe cover 502 respectively, and fixing it with the fixing member 504, the corrugated pipe fitting is secured. 503 is installed between the bellows base 501 and the bellows cover 502, which facilitates the installation of the bellows fitting 503. When replacing it, the fixing part 504 needs to be removed to replace the bellows fitting 503, which facilitates the replacement of the bellows fitting 503. By using the sealing ring 506 to seal between the bellows base 501 and the bellows cover 502 and the bellows fitting 503, the sealing performance between the bellows base 501 and the bellows cover 502 and the bellows fitting 503 is improved.

[0021] See appendix Figure 1 , 3As shown, a valve seat 6 adapted to the valve core 301 is also installed inside the valve body 1; the valve core 301 is also provided with a plurality of sealing elements 7 to improve the sealing performance between the valve core 301 and the valve seat 6 and to withstand high temperature and high pressure; the sealing elements 7 can be flexible graphite or metal sealing rings; a packing 8 is also installed between the valve stem 3 and the valve cover 2; a packing gland 801 fixed on the valve cover 2 is installed on the packing 8; by providing multiple sealing elements 7 on the valve core 301, the sealing performance between the valve core 301 and the valve seat 6 is improved, preventing leakage when the valve is not in use; by also installing the packing 8 between the valve stem 3 and the valve cover 2, and installing the packing gland 801 fixed on the valve cover 2 on the packing 8, the sealing performance of the valve is further improved, preventing leakage.

[0022] In this invention, when installing the bellows assembly, the insertion bosses 507 on the bellows fitting 503 are inserted into the insertion slots 505 on the bellows base 501 and the bellows cover 502, respectively, and fixed using the fixing member 504. The bellows fitting 503 is then installed between the bellows base 501 and the bellows cover 502. The completed bellows assembly is then fitted onto the valve stem, and the bellows base 501 is installed between the intermediate valve cover 4 and the valve body 1. The bellows top cover 502 is installed between the intermediate valve cover 4 and the valve cover 2. At the same time, sealing rings are used to seal between the bellows base 501 and the intermediate valve cover 4 and the valve body 1, and between the bellows top cover 502 and the intermediate valve cover 4 and the valve cover 2. When the bellows component 503 is damaged and needs to be replaced, the intermediate valve cover 4 and the valve cover 2 are removed from the valve body 1, and then the fasteners are loosened, so that the bellows component 503 can be removed and replaced between the bellows top cover 502 and the bellows base 501.

[0023] The above embodiments are illustrative of the present invention and are not intended to limit the present invention. Any simple modifications to the present invention are within the protection scope of the present invention.

Claims

1. A high-temperature and high-pressure resistant self-operated bellows-type pressure regulating valve, comprising a valve body (1), a valve cover (2) mounted on the valve body (1), a valve stem (3) passing through the valve cover (2) and mounted inside the valve body (1), and a valve core (301) disposed on the valve stem (3); characterized in that... An intermediate valve cover (4) is installed between the valve body (1) and the valve cover (2); the intermediate valve cover (4) is fitted inside the valve stem (3) and one end is fixed between the valve cover (2) and the intermediate valve cover (4), and the other end is fixed between the valve body (1) and the intermediate valve cover (4). The bellows assembly (5) includes a bellows base (501) and a bellows top cover (502), which is detachably inserted into the intermediate valve cover (4). The corrugated pipe fitting (503) and the fixing member (504) for fixing the corrugated pipe fitting (503) are provided; the corrugated pipe base (501) and the corrugated pipe cover (502) are both provided with insertion slots (505) to facilitate the insertion of the corrugated pipe fitting (503); a sealing ring (506) is installed in the insertion slot (505); the corrugated pipe fitting (503) is provided with an insertion boss (507) that matches the insertion slot (505).

2. The high-temperature and high-pressure resistant self-operated bellows-type pressure regulating valve according to claim 1, characterized in that: The valve body (1) is also equipped with a valve seat (6) that is compatible with the valve core (301).

3. The high-temperature and high-pressure resistant self-operated bellows-type pressure regulating valve according to claim 2, characterized in that: The valve core (301) is also provided with several sealing elements (7) to improve the sealing between the valve core (6) and the valve seat (6) and to withstand high temperature and high pressure.

4. The high-temperature and high-pressure resistant self-operated bellows-type pressure regulating valve according to claim 3, characterized in that: The sealing element (7) may be a flexible graphite or metal sealing ring.

5. A high-temperature and high-pressure resistant self-operated bellows-type pressure regulating valve according to claim 1, characterized in that: A packing (8) is also installed between the valve stem (3) and the valve cover (2); a packing gland (801) fixed on the valve cover (2) is installed on the packing (8).

Images