Nuclear-grade pressure-resistant temperature and pressure switch

Abstract

The invention relates to the technical field of pressure switches, in particular to a nuclear-grade pressure-resistant temperature pressure switch, which comprises a shell, a control element, a detection cylinder and a detection probe, the detection probe is mounted in the detection cylinder; the control element is mounted in the shell; a buffer cavity is formed in the detection cylinder; a sealing block is slidably connected into the buffer cavity, and a first spring is installed in the buffer cavity. The first spring is fixedly connected with the sealing block; a detection pressure sensor is fixedly connected in the buffer cavity; the contact block is fixedly connected with the first spring. The buffer cavity is formed in the detection cylinder, so that the sealing block and the first spring in the buffer cavity share the pressure change in the detection cylinder when the pressure in the pipeline is suddenly changed, and the detection probe is protected; and meanwhile, a first spring, a second spring and a third spring are arranged in the buffer cavity, so that more pressure is accommodated step by step, and the limited buffer stroke in the buffer cavity can buffer larger pressure.

Description

Technical Field

[0001] The present invention relates to the technical field of pressure switches, and in particular to a nuclear-grade pressure-resistant temperature pressure switch. Background Art

[0002] The nuclear-grade pressure-resistant temperature and pressure switch is a precision control device designed for high-demand fields such as the nuclear industry. It has excellent pressure resistance and can operate stably under extreme pressure and temperature conditions to ensure the safety and reliability of nuclear facilities. It uses high-precision sensors that can accurately sense subtle changes in temperature and pressure, triggering the switch action with high accuracy and rapid response; The nuclear-grade pressure-resistant temperature and pressure switch uses special sealing and protective materials, which can effectively resist the influence of nuclear radiation, chemical corrosion and various harsh environmental factors. In addition, in order to ensure its long-term stable operation, the design also fully considers the needs of easy maintenance and replacement of parts, reducing the risk of nuclear facility shutdown due to equipment failure; In practical applications, nuclear-grade pressure-resistant temperature and pressure switches will be connected to complex monitoring systems to achieve real-time data transmission and remote monitoring; The nuclear-grade pressure-resistant temperature and pressure switch is installed on the pipeline to detect the temperature and pressure of the medium flowing in the pipeline. When the temperature or pressure of the medium flowing in the pipeline reaches the set value, the nuclear-grade pressure-resistant temperature and pressure switch controls the connected electrical components; When the flow rate of the medium in the pipeline changes suddenly, such as the rapid closing or opening of the valve, the sudden start or stop of the pump, the pressure will increase or decrease sharply in a short period of time. When the pressure change is transmitted to the position of the nuclear-grade pressure-resistant temperature and pressure switch, it will cause damage to the nuclear-grade pressure-resistant temperature and pressure switch, thereby causing limitations.

[0003] To this end, we propose a nuclear-grade pressure-resistant temperature and pressure switch. Summary of the invention

[0004] In view of the deficiencies of the prior art, the present invention provides a nuclear-grade pressure-resistant temperature and pressure switch, which overcomes the deficiencies of the prior art and aims to solve the problems in the background technology.

[0005] To achieve the above object, the present invention provides the following technical solution: a nuclear-grade pressure-resistant temperature and pressure switch, comprising: A housing, a control element, a detection cylinder and a detection probe; the detection probe is installed in the detection cylinder; the control element is installed in the housing; a buffer cavity is provided in the detection cylinder; a sealing block is slidably connected in the buffer cavity, and a No. 1 spring is installed in the buffer cavity; the No. 1 spring is fixedly connected to the sealing block.

[0006] Preferably, a detection pressure sensor is fixedly connected in the buffer cavity; a contact block is fixedly connected to the detection pressure sensor; and the contact block is fixedly connected to the No. 1 spring.

[0007] Preferably, a pair of No. 1 springs are symmetrically arranged in the buffer cavity; a pair of No. 2 springs and a pair of No. 3 springs are symmetrically arranged in the buffer cavity; the No. 2 spring and the No. 3 spring are both fixedly connected to the contact block; the lengths of the No. 1 spring, the No. 2 spring and the No. 3 spring decrease successively.

[0008] Preferably, a receiving groove is provided in the buffer cavity; a spacer plate is evenly slidably connected in the receiving groove; a connecting rope is fixedly connected between the spacer plates; and the sealing block is fixedly connected to the spacer plate via the connecting rope.

[0009] By arranging a buffer chamber in the detection cylinder, the sealing block and the No. 1 spring in the buffer chamber can share the pressure change in the detection cylinder when the pressure in the pipeline changes suddenly, thereby protecting the detection probe; at the same time, the No. 1 spring, the No. 2 spring and the No. 3 spring are arranged in the buffer chamber to accommodate more pressure in a step-by-step manner. Therefore, the limited buffer stroke in the buffer chamber of the present invention can buffer a larger pressure.

[0010] Preferably, the opening of the buffer cavity in the detection cylinder is at the same height as the detection probe, and the sealing block, the No. 1 spring, the No. 2 spring, the No. 3 spring and the pressure sensor in the buffer cavity are all located at the rear end of the detection cylinder.

[0011] By arranging the buffer cavity in the rear half of the detection tube, the volume of the front half of the detection tube is small, which is convenient for installation on the pipeline. The buffer cavity opening is close to the position of the detection probe, which can respond to pressure shocks more quickly and disperse them.

[0012] Preferably, a No. 1 sealing ring and a No. 2 sealing ring are installed on the detection cylinder; the end faces of the No. 1 sealing ring and the No. 2 sealing ring close to each other are arranged in a curved shape so as to fit with the inner and outer walls of the pipeline.

[0013] Preferably, a mounting groove is provided on the detection cylinder; a push block is slidably connected in the mounting groove; a support rod is fixedly connected to the No. 2 sealing ring; a connecting rod is hinged between the support rod and the push block; and the No. 2 sealing ring is fixedly connected in the mounting groove.

[0014] Preferably, a push ring is threadedly connected to the detection tube; the push ring is threadably matched with the push block; when the push ring rotates, it moves toward the second sealing ring and drives the push block to move toward the direction close to the push ring.

[0015] A No. 1 sealing ring and a No. 2 sealing ring are arranged on the detection tube, and the No. 2 sealing ring is pulled by a push block so that the No. 2 sealing ring is folded, so that the No. 2 sealing ring can be inserted into the hole on the pipeline, and the No. 2 sealing ring is then unfolded in the pipeline, thereby sealing the hole inside and outside the pipeline hole.

[0016] Beneficial effects of the present invention: 1. The present invention provides a buffer chamber in the detection tube, so that the sealing block and the No. 1 spring in the buffer chamber can share the pressure change in the detection tube when the pressure in the pipeline changes suddenly, thereby protecting the detection probe; at the same time, the No. 1 spring, the No. 2 spring and the No. 3 spring are provided in the buffer chamber, so as to accommodate more pressure in a step-by-step manner. Therefore, the limited buffer stroke in the buffer chamber of the present invention can buffer a larger pressure.

[0017] 2. The present invention sets spring No. 1, spring No. 2 and spring No. 3 to different lengths, so that the sealing block, spring No. 1, spring No. 2 and spring No. 3 in the buffer cavity of the present invention can accommodate more pressure in a stepped manner, so the limited buffer stroke in the buffer cavity of the present invention can buffer a larger pressure; the present invention sets the buffer cavity in the rear half of the detection tube, so that the volume of the front half of the detection tube is small, which is convenient for installation on the pipeline, and the buffer cavity opening is close to the position of the detection probe, which can respond to pressure shocks more quickly and disperse them.

[0018] 3. The present invention arranges a No. 1 sealing ring and a No. 2 sealing ring on the detection tube, and pulls the No. 2 sealing ring through a push block, so that the No. 2 sealing ring is folded, so that the No. 2 sealing ring can be inserted into the hole on the pipeline, and the No. 2 sealing ring is then unfolded in the pipeline, thereby sealing the hole inside and outside the pipeline hole. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural schematic diagram of the present invention; Figure 2 It is a structural schematic diagram of the detection tube, the first sealing ring, the second sealing ring and the push ring in another perspective of the present invention; Figure 3 for Figure 2 The enlarged view of point A in the middle; Figure 4 It is a cross-sectional view of the detection tube, the first sealing ring, the second sealing ring, the push ring and the push block in the present invention; Figure 5 for Figure 4 The enlarged view of point B in the middle; Figure 6 for Figure 5 Enlarged view of point C in the middle.

[0020] In the figure: 11, housing; 12, detection tube; 13, detection probe; 14, buffer chamber; 15, sealing block; 16, spring No. 1; 17, detection pressure sensor; 18, spring No. 2; 19, spring No. 3; 2, contact block; 21, receiving groove; 22, spacer; 23, connecting rope; 3, sealing ring No. 1; 31, sealing ring No. 2; 4, mounting groove; 41, pushing block; 42, supporting rod; 43, connecting rod; 44, pushing ring. DETAILED DESCRIPTION

[0021] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] Embodiment 1: Refer to the attached specification Figure 1 , 2 , 3, 4, 5 and 6, a nuclear grade pressure-resistant temperature and pressure switch, comprising: A housing 11, a control element, a detection tube 12 and a detection probe 13; the detection probe 13 is installed in the detection tube 12; the control element is installed in the housing 11; a buffer cavity 14 is provided in the detection tube 12; a sealing block 15 is slidably connected in the buffer cavity 14, and a No. 1 spring 16 is installed in the buffer cavity 14; the No. 1 spring 16 is fixedly connected to the sealing block 15.

[0023] In the present invention, a detection pressure sensor 17 is fixedly connected in the buffer cavity 14 ; a contact block 2 is fixedly connected to the detection pressure sensor 17 ; and the contact block 2 is fixedly connected to a No. 1 spring 16 .

[0024] In the present invention, a pair of No. 1 springs 16 are symmetrically arranged in the buffer cavity 14; a pair of No. 2 springs 18 and a pair of No. 3 springs 19 are symmetrically arranged in the buffer cavity 14; the No. 2 spring 18 and the No. 3 spring 19 are both fixedly connected to the contact block 2; the lengths of the No. 1 spring 16, the No. 2 spring 18 and the No. 3 spring 19 decrease successively.

[0025] In the present invention, a receiving groove 21 is provided in the buffer cavity 14 ; a partition plate 22 is evenly slidably connected in the receiving groove 21 ; a connecting rope 23 is fixedly connected between the partition plates 22 ; and the sealing block 15 is fixedly connected to the partition plates 22 via the connecting rope 23 .

[0026] In the present invention, the detection cylinder 12 is installed on the pipeline. When the medium in the pipeline passes through the position of the detection cylinder 12, the detection probe 13 in the detection cylinder 12 detects the temperature and pressure of the medium in the pipeline. When the pressure of the medium in the pipeline increases sharply in a short time, the sealing block 15 in the buffer cavity 14 moves toward the direction close to the detection pressure sensor 17, so that the sealing block 15 in the buffer cavity 14 shares the pressure in the detection tube 12, so that when the pressure of the medium in the pipeline increases sharply, the instantaneous pressure change received by the detection probe 13 becomes smaller than before, thereby protecting the detection probe 13. At the same time, during the movement of the sealing block 15 in the buffer cavity 14, the No. 1 spring 16 is squeezed, and the No. 1 spring 16 transmits the pressure to the detection pressure sensor 17, so that the detection pressure sensor 17 detects the pressure change, thereby obtaining the pressure shared by the buffer cavity 14, and combining the pressure change of the detection pressure sensor 17 with the pressure of the detection probe 13 to obtain the pressure value in the detection tube 12; In the present invention, a No. 2 spring 18 and a No. 3 spring 19 are arranged in the accommodating cavity, and the lengths of the No. 1 spring 16, the No. 2 spring 18 and the No. 3 spring 19 are successively reduced, so that after the No. 1 spring 16 is compressed to a certain extent, the No. 2 spring 18 is also compressed until the No. 3 spring 19 is also compressed, so that the sealing block 15, the No. 1 spring 16, the No. 2 spring 18 and the No. 3 spring 19 in the buffer cavity 14 of the present invention can accommodate more pressure in a stepwise manner, so the limited buffer stroke in the buffer cavity 14 of the present invention can buffer a greater pressure; In the present invention, the spacer plates 22 between the No. 1 spring 16, the No. 2 spring 18 and the No. 3 spring 19 can separate the No. 1 spring 16, the No. 2 spring 18 and the No. 3 spring 19, and prevent the No. 1 spring 16, the No. 2 spring 18 and the No. 3 spring 19 from bending when compressed, thereby affecting the movement of the sealing block 15; the spacer plates 22 are connected by connecting ropes 23, and the spacer plates 22 are slidably connected in the receiving groove 21, so as not to affect the movement of the sealing block 15; The present invention provides a buffer chamber 14 in the detection tube 12, so that the sealing block 15 and the No. 1 spring 16 in the buffer chamber 14 share the pressure change in the detection tube 12 when the pressure in the pipeline changes suddenly, thereby protecting the detection probe 13; at the same time, the No. 1 spring 16, the No. 2 spring 18 and the No. 3 spring 19 are provided in the buffer chamber 14, so as to accommodate more pressure in a step-by-step manner. Therefore, the limited buffer stroke in the buffer chamber 14 of the present invention can buffer a larger pressure.

[0027] Embodiment 2: Based on Embodiment 1, refer to the attached Figure 1 , 2 , 3, 4, 5 and 6, in the present invention, the opening of the buffer cavity 14 located in the detection tube 12 is at the same height as the detection probe 13, and the sealing block 15, the No. 1 spring 16, the No. 2 spring 18, the No. 3 spring 19 and the pressure sensor in the buffer cavity 14 are all located at the rear end of the detection tube 12.

[0028] In the present invention, the buffer cavity 14 is arranged in the rear half of the detection tube 12, so that the volume of the front half of the detection tube 12 is small, which is convenient for installation on the pipeline, and the opening of the buffer cavity 14 is close to the position of the detection probe 13, which can respond to pressure shocks more quickly and disperse them.

[0029] In the present invention, a first sealing ring 3 and a second sealing ring 31 are installed on the detection tube 12; the end surfaces of the first sealing ring 3 and the second sealing ring 31 close to each other are arranged in a curved shape, which can fit with the inner and outer walls of the pipeline.

[0030] In the present invention, a mounting groove 4 is provided on the detection tube 12; a push block 41 is slidably connected in the mounting groove 4; a support rod 42 is fixedly connected to the second sealing ring 31; a connecting rod 43 is hinged between the support rod 42 and the push block 41; and the second sealing ring 31 is fixedly connected in the mounting groove 4.

[0031] In the present invention, a push ring 44 is threadedly connected to the detection tube 12 ; the push ring 44 is threadedly matched with the push block 41 ; when the push ring 44 rotates, it moves toward the second sealing ring 31 and drives the push block 41 to move toward the push ring 44 .

[0032] In the present invention, a No. 1 sealing ring 3 and a No. 2 sealing ring 31 are arranged on the detection tube 12. When installing the detection tube 12, a hole is drilled on the pipeline, and then the push ring 44 is rotated in the reverse direction, so that the push block 41 pulls the No. 2 sealing ring 31, so that the No. 2 sealing ring 31 bends in the direction close to the push block 41, and the diameter of the No. 2 sealing ring 31 is reduced, so that the front end of the detection tube 12 is conveniently inserted into the hole opened in the pipeline, and then the push ring 44 is rotated forwardly, so that the push block 41 pushes the No. 2 sealing ring 31, so that the No. 2 sealing ring 31 is expanded, so that the No. 2 sealing ring 31 is in the pipeline, and the No. 1 sealing ring 3 is outside the pipeline, so that the No. 1 sealing ring 3 and the No. 2 sealing ring 31 are respectively located above and below the pipeline hole, and then the push ring 44 is continuously rotated, so that the No. 1 sealing ring 3 and the No. 2 sealing ring 31 close the hole in the pipeline, so when installing the detection tube 12 of the present invention, a hole can be opened on the pipeline at will, and then installed; The present invention arranges a No. 1 sealing ring 3 and a No. 2 sealing ring 31 on the detection tube 12, and pulls the No. 2 sealing ring 31 through the push block 41, so that the No. 2 sealing ring 31 is folded, so that the No. 2 sealing ring 31 can be inserted into the hole on the pipeline, and the No. 2 sealing ring 31 is then unfolded in the pipeline, so as to seal the hole inside and outside the pipeline hole.

[0033] Those skilled in the art should understand that the present invention is not limited to the above-mentioned embodiments. The above-mentioned embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which shall fall within the scope of the present invention to be protected. The scope of protection claimed in the present invention is defined by the attached claims and their equivalents.

Claims

1. A nuclear grade pressure-resistant temperature and pressure switch, characterized in that: include A housing (11), a control element, a detection cylinder (12) and a detection probe (13); the detection probe (13) is installed in the detection cylinder (12); the control element is installed in the housing (11); a buffer cavity (14) is provided in the detection cylinder (12); a sealing block (15) is slidably connected in the buffer cavity (14), and a No. 1 spring (16) is installed in the buffer cavity (14); the No. 1 spring (16) is fixedly connected to the sealing block (15).

2. A nuclear grade pressure-resistant temperature and pressure switch according to claim 1, characterized in that: A detection pressure sensor (17) is fixedly connected in the buffer cavity (14); a contact block (2) is fixedly connected to the detection pressure sensor (17); and the contact block (2) is fixedly connected to the No. 1 spring (16).

3. A nuclear grade pressure-resistant temperature and pressure switch according to claim 2, characterized in that: A pair of the No. 1 springs (16) are symmetrically arranged in the buffer cavity (14); a pair of No. 2 springs (18) and a pair of No. 3 springs (19) are symmetrically arranged in the buffer cavity (14); the No. 2 springs (18) and the No. 3 springs (19) are both fixedly connected to the contact block (2); the lengths of the No. 1 spring (16), the No. 2 spring (18) and the No. 3 spring (19) decrease in sequence.

4. A nuclear grade pressure-resistant temperature and pressure switch according to claim 3, characterized in that: The buffer cavity (14) is provided with a receiving groove (21); a spacer plate (22) is evenly slidably connected in the receiving groove (21); a connecting rope (23) is fixedly connected between the spacer plates (22); and the sealing block (15) is fixedly connected to the spacer plates (22) via the connecting rope (23).

5. A nuclear grade pressure-resistant temperature and pressure switch according to claim 4, characterized in that: The opening of the buffer chamber (14) in the detection tube (12) is at the same height as the detection probe (13); the sealing block (15), the No. 1 spring (16), the No. 2 spring (18), the No. 3 spring (19) and the pressure sensor in the buffer chamber (14) are all located at the rear end of the detection tube (12).

6. A nuclear grade pressure-resistant temperature and pressure switch according to claim 5, characterized in that: A first sealing ring (3) and a second sealing ring (31) are mounted on the detection cylinder (12); the end surfaces of the first sealing ring (3) and the second sealing ring (31) close to each other are arranged in a curved shape so as to fit against the inner and outer walls of the pipeline.

7. The nuclear grade pressure-resistant temperature and pressure switch according to claim 6, characterized in that: The detection cylinder (12) is provided with a mounting groove (4); a push block (41) is slidably connected in the mounting groove (4); a support rod (42) is fixedly connected to the second sealing ring (31); a connecting rod (43) is hingedly connected between the support rod (42) and the push block (41); and the second sealing ring (31) is fixedly connected in the mounting groove (4).

8. The nuclear grade pressure-resistant temperature and pressure switch according to claim 7, characterized in that: A push ring (44) is threadedly connected to the detection cylinder (12); the push ring (44) is threadedly matched with the push block (41); when the push ring (44) rotates, it moves toward the second sealing ring (31) and drives the push block (41) to move in a direction close to the push ring (44).

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